CA1037543A - Sheet reversing apparatus and a duplex reproducing apparatus employing same - Google Patents
Sheet reversing apparatus and a duplex reproducing apparatus employing sameInfo
- Publication number
- CA1037543A CA1037543A CA198,829A CA198829A CA1037543A CA 1037543 A CA1037543 A CA 1037543A CA 198829 A CA198829 A CA 198829A CA 1037543 A CA1037543 A CA 1037543A
- Authority
- CA
- Canada
- Prior art keywords
- web
- sheets
- storage
- sheet
- roll
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/22—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20
- G03G15/23—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 specially adapted for copying both sides of an original or for copying on both sides of a recording or image-receiving material
- G03G15/231—Arrangements for copying on both sides of a recording or image-receiving material
- G03G15/232—Arrangements for copying on both sides of a recording or image-receiving material using a single reusable electrographic recording member
- G03G15/234—Arrangements for copying on both sides of a recording or image-receiving material using a single reusable electrographic recording member by inverting and refeeding the image receiving material with an image on one face to the recording member to transfer a second image on its second face, e.g. by using a duplex tray; Details of duplex trays or inverters
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Exposure Or Original Feeding In Electrophotography (AREA)
- Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)
- Discharge By Other Means (AREA)
- Registering Or Overturning Sheets (AREA)
- Sheets, Magazines, And Separation Thereof (AREA)
- Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
- Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
- Holders For Sensitive Materials And Originals (AREA)
- Counters In Electrophotography And Two-Sided Copying (AREA)
- Paper Feeding For Electrophotography (AREA)
- Control Or Security For Electrophotography (AREA)
- Conveyance By Endless Belt Conveyors (AREA)
- Delivering By Means Of Belts And Rollers (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A sheet reversing apparatus for reorienting sheets so that a first side and an opposing side of the sheets may be operated upon is provided including means for storing the sheets. The storing means comprises a web wherein the sheets are supported between adjacent layers. Means are provided which act on the web to deliver the sheets therefrom in a reversed orientation. Preferably the delivering means deflects the web through an arcuate path to reposition it so that the sheets may be ejected with the proper orientation.
A reproducing apparatus employing the above sheet reversing system forooriginal documents and/or copy sheets is also provided as well as a process for reversing and reproducing sheets.
A sheet reversing apparatus for reorienting sheets so that a first side and an opposing side of the sheets may be operated upon is provided including means for storing the sheets. The storing means comprises a web wherein the sheets are supported between adjacent layers. Means are provided which act on the web to deliver the sheets therefrom in a reversed orientation. Preferably the delivering means deflects the web through an arcuate path to reposition it so that the sheets may be ejected with the proper orientation.
A reproducing apparatus employing the above sheet reversing system forooriginal documents and/or copy sheets is also provided as well as a process for reversing and reproducing sheets.
Description
This invention relates to a sheet reversing apparatus and to a reproducing machine incorporating the sheet reversing apparatus. `
A wide variety of reproducing mac~ines o~ the xero-graphic type have been developed which are capable of forming images on both sides of the copy sheets. This process is commonly referred to in the art as duplexing. Illustrative o~ these mach~nes are those set forth in U. S. Patent Nos.
3,227,444~3,318,212, 3,506,347, 3,580,670, 3,615,129, and 3,645,615.
The art has also developed a vaxiety of apparatuses capable of storing, transporting and delivering articles as exemplified by those set forth in U. S. Patent Nos. 1,835,065,
A wide variety of reproducing mac~ines o~ the xero-graphic type have been developed which are capable of forming images on both sides of the copy sheets. This process is commonly referred to in the art as duplexing. Illustrative o~ these mach~nes are those set forth in U. S. Patent Nos.
3,227,444~3,318,212, 3,506,347, 3,580,670, 3,615,129, and 3,645,615.
The art has also developed a vaxiety of apparatuses capable of storing, transporting and delivering articles as exemplified by those set forth in U. S. Patent Nos. 1,835,065,
2,981,492, 3,074,663. These patent~3 all disclose the use of a we~ type member for storing articles. U. S, Pateht No.
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1,838~065 discloses the storage transpoxting and delivering `~
of articles to an accounting type machine, The articles are stored and supported between the ad;acent layers of a band of material in roll form and are delivered from the storage roll by ejection from the band as it is being unrolled.
~ ' .' ' .SUMMARY OF THE INVENTION
In accordance with this invention a sheet reversing apparatus and a process employing the apparatus is provided which is capable of turning over sheets to expose a first ~ide and then an opposing side for processing. The apparatus may include means for processing the sicles of the sheet.
The sheet reversing apparatus includes means for storing the sheets after they have been processed on the first side. The storage means comprises a web in-thelform of a roll ~`~
wherein the sheets are supported bet:ween adjacent layers of the web. The apparatus also includes means for delivering the sheets from the storage means to a processing means with the ppposing side of the sheet being orientea for processing 2Q by the processing means, The delivering means preferably ` `
in~ludes a recycling memher which deflects the web through an `~
arcuate path to reposition the web so that the sheet may be ejected from the storage roll with the opposing side oriented ~;
for processing. The web material is comparatively thin so that a large number of sheets can be stored in this manner without having the storage roll become too large in diameter. `~
The sheet reversing apparatus is used in accordance with one embodiment of this invention in a reproducing machine wherein it is desired to produce an image on both sides of the sheet. The apparatus may be employed in such a machine for reversing the orientation of the copy sheets and/or the original ''."'~' `' '` ` ' - 2 _ ~
:.`. .
~037S43 documents. The process in accordance with this invention includes processing the sheets on a first side, storing the sheets between adjacent layers of a web, deflecting the web . - ~ . , through a desired path to deliver the sheets oriented for processing on their opposing sides. The processing may `~
comprise reproducing an original.
The aforenoted sheet reversing apparatus and ;
process and the reproducing machines and reproducing processes of this invention provide an improved duplexing mode of operation. Problems of multi-feeding associated with various of the prior art devices for duplexing are avoided in accordance with this invention since the copy sheets and/or the documents ;
are spaced along the web in the sequence in which they are to be acted upon so that there is no possibility of multi-feeding.
This is a particularly important improvement since multi-feeding in a duplexing operation is disastrous/ since it results in an improper sequence of images on the respective sheets.
Thus, in accordance with the present teachings, there is provided a sheet reversing apparatus for orienting sheets so that a first side and opposing side of the sheets may be operated upon. The apparatus comprises a web means for storing the sheets wherein the sheets are supported between adjacent layers with means being provided to act upon the web to deliver the sheets stored on the web in a reversed orientation. ;
By a more specific embodiment an improvement is provided in a reproducing apparatus which includes means for supporting an original document, means for feeding the document to the support means and means for forming an image on the document. The improvement resides in communicating means with the support means comprising a web for receiving and storing the document after the first side has been imaged, the document being supported between adjacent layers thereof. Means ~3~
. . , : . ; . ~: ~ . . . . . .
, . . .. . . .. . . .. . ..
i~37543 are provided to act on the web to deliver the documents stored on the web in a reversed orientation to the support surface for imaging the opposite side of the document.
In accordance with a further aspect of the present teachings a process is provided for reversing the orientation of a sheet so that the first and the opposing side of the sheet may be operated upon. The process comprises storing the sheet on a web wherein the sheets are supported between adjacent layers thereof and deflecting the web to reposition the web so that the sheets may be ejected therefrom . ~ ..
with the opposing side orientated to be operated upon and delivering the sheets from the web.
These and other aspects will become more apparent from the following description and drawings in which: ~ -BRIEF DESCRIPTION OF THE DRAWINGS , Figure 1 is a schematic view of an automatic reproducing machine incorporating the sheet reversing apparatus of this invention.
Figure 2 is a perspective view of the recycling 20 member which forms part of the reversing apparatus. "`~
Figure 3 shows a series of schematic views ,~
illustrating the operation of the recycling member. r, Figure 4 shows a schematic view of the ~ .
reproducing apparatus of Figure 1 wherein the reversing apparatus is positioned to deliver the sheets for processing on the opposing side of the sheet.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring now to Figure 1, there is shown by way of ?~
of example an electrostatographic reproducing machine 1 which incorporates the improved sheet reversing apparatus 2 of the present invention. The reproducing machine 1 depicted in -3a-' ' `~, ~ ' ,' ' ' ~' `
' '' ' ' `~ ' ` ' '` ' ` .
~1 ~3`75~3 ~ :
Fîgure 1 illustrates the various components utili2ed therein .
for xerographically reproducing copies from an original document~
Although the sheet reversing apparatus of the present invention is particularly well adapted for use in an automatic xerographic reproducing machine 1, it should become evident from the following description that it is equally well suited for use in a wide variety of processing systems including other ' ~""
' '~
":
, ~' - ~: , ' :' ' . .: , . . . :
electrostatographic systems and it is not necessarily limited in its application to the- particular embodiment or embodiments shown herein.
The reproducing machine illustrated in Figure 1 employs an image recording drum like member 10, the outer ;~
periphery of which is coated with a suitable photoconductive material 11, One type of suitable photoconductive material is disclosed in V.S, Patent No. 2,970,9Q6, issued to Bixby in 1961. The drum 10 is suitably journaled ~or rotation within a machine frame tnot shown) by means of a shaft 12 and rotates --in the direction indicated by arrow 13, to bring the image retaining surface thereon past a plurality of xerographic processing stations. Suitable drive means (not shown) are provided to power and coordinate the motion of the various cooperating machine components whereby a faithful reproduction of the original input scene information is recorded upon a sheet 14 of final support material such as paper or the like.
The practice of xerography is well-known in the `;
art, and is the subject of numerous patents and texts, -including~r ~tr~l~h~ rA~v by Schaffert, published in 1965, and ~ by Dessauer and Clark, published in 1965. The various processing stations for pro~
ducing a copy of an original are herein represented in Figure 1 as blocks A to E. Initially~ the drum 10 moves photoconduc-tive surface 11 through charging station A. I~ charging station A an electrostatic charge is placed uniform~ over -~
the photoconductive surface 11 of the drum 10 preparatory to ;
imaging. The charging may-be provided by a corona generating ;
device of a type described in U,S. Patent No. 2,836~725 issued to Vyverberg in 1958. ;~
Thereafter~ the drum 10 is rotated to exposure station B where the charged photoconductive surface 11 is - ?
~()375~3 ::
exposed to a light image of the original input scene information, whereby the charge is selectively dissipated in the light exposed regions to rec0rd the original inpu~ scene in the form of a latent electrostatic image, A suitable exposure system may be of the type described in U.S. Patent No. `~
-- 1 -- .
~ ~.
,~ , . . ~
~'''' . i : . , . . . ~ . . , lV3~ii43 ~ ~
1,838~065 discloses the storage transpoxting and delivering `~
of articles to an accounting type machine, The articles are stored and supported between the ad;acent layers of a band of material in roll form and are delivered from the storage roll by ejection from the band as it is being unrolled.
~ ' .' ' .SUMMARY OF THE INVENTION
In accordance with this invention a sheet reversing apparatus and a process employing the apparatus is provided which is capable of turning over sheets to expose a first ~ide and then an opposing side for processing. The apparatus may include means for processing the sicles of the sheet.
The sheet reversing apparatus includes means for storing the sheets after they have been processed on the first side. The storage means comprises a web in-thelform of a roll ~`~
wherein the sheets are supported bet:ween adjacent layers of the web. The apparatus also includes means for delivering the sheets from the storage means to a processing means with the ppposing side of the sheet being orientea for processing 2Q by the processing means, The delivering means preferably ` `
in~ludes a recycling memher which deflects the web through an `~
arcuate path to reposition the web so that the sheet may be ejected from the storage roll with the opposing side oriented ~;
for processing. The web material is comparatively thin so that a large number of sheets can be stored in this manner without having the storage roll become too large in diameter. `~
The sheet reversing apparatus is used in accordance with one embodiment of this invention in a reproducing machine wherein it is desired to produce an image on both sides of the sheet. The apparatus may be employed in such a machine for reversing the orientation of the copy sheets and/or the original ''."'~' `' '` ` ' - 2 _ ~
:.`. .
~037S43 documents. The process in accordance with this invention includes processing the sheets on a first side, storing the sheets between adjacent layers of a web, deflecting the web . - ~ . , through a desired path to deliver the sheets oriented for processing on their opposing sides. The processing may `~
comprise reproducing an original.
The aforenoted sheet reversing apparatus and ;
process and the reproducing machines and reproducing processes of this invention provide an improved duplexing mode of operation. Problems of multi-feeding associated with various of the prior art devices for duplexing are avoided in accordance with this invention since the copy sheets and/or the documents ;
are spaced along the web in the sequence in which they are to be acted upon so that there is no possibility of multi-feeding.
This is a particularly important improvement since multi-feeding in a duplexing operation is disastrous/ since it results in an improper sequence of images on the respective sheets.
Thus, in accordance with the present teachings, there is provided a sheet reversing apparatus for orienting sheets so that a first side and opposing side of the sheets may be operated upon. The apparatus comprises a web means for storing the sheets wherein the sheets are supported between adjacent layers with means being provided to act upon the web to deliver the sheets stored on the web in a reversed orientation. ;
By a more specific embodiment an improvement is provided in a reproducing apparatus which includes means for supporting an original document, means for feeding the document to the support means and means for forming an image on the document. The improvement resides in communicating means with the support means comprising a web for receiving and storing the document after the first side has been imaged, the document being supported between adjacent layers thereof. Means ~3~
. . , : . ; . ~: ~ . . . . . .
, . . .. . . .. . . .. . ..
i~37543 are provided to act on the web to deliver the documents stored on the web in a reversed orientation to the support surface for imaging the opposite side of the document.
In accordance with a further aspect of the present teachings a process is provided for reversing the orientation of a sheet so that the first and the opposing side of the sheet may be operated upon. The process comprises storing the sheet on a web wherein the sheets are supported between adjacent layers thereof and deflecting the web to reposition the web so that the sheets may be ejected therefrom . ~ ..
with the opposing side orientated to be operated upon and delivering the sheets from the web.
These and other aspects will become more apparent from the following description and drawings in which: ~ -BRIEF DESCRIPTION OF THE DRAWINGS , Figure 1 is a schematic view of an automatic reproducing machine incorporating the sheet reversing apparatus of this invention.
Figure 2 is a perspective view of the recycling 20 member which forms part of the reversing apparatus. "`~
Figure 3 shows a series of schematic views ,~
illustrating the operation of the recycling member. r, Figure 4 shows a schematic view of the ~ .
reproducing apparatus of Figure 1 wherein the reversing apparatus is positioned to deliver the sheets for processing on the opposing side of the sheet.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring now to Figure 1, there is shown by way of ?~
of example an electrostatographic reproducing machine 1 which incorporates the improved sheet reversing apparatus 2 of the present invention. The reproducing machine 1 depicted in -3a-' ' `~, ~ ' ,' ' ' ~' `
' '' ' ' `~ ' ` ' '` ' ` .
~1 ~3`75~3 ~ :
Fîgure 1 illustrates the various components utili2ed therein .
for xerographically reproducing copies from an original document~
Although the sheet reversing apparatus of the present invention is particularly well adapted for use in an automatic xerographic reproducing machine 1, it should become evident from the following description that it is equally well suited for use in a wide variety of processing systems including other ' ~""
' '~
":
, ~' - ~: , ' :' ' . .: , . . . :
electrostatographic systems and it is not necessarily limited in its application to the- particular embodiment or embodiments shown herein.
The reproducing machine illustrated in Figure 1 employs an image recording drum like member 10, the outer ;~
periphery of which is coated with a suitable photoconductive material 11, One type of suitable photoconductive material is disclosed in V.S, Patent No. 2,970,9Q6, issued to Bixby in 1961. The drum 10 is suitably journaled ~or rotation within a machine frame tnot shown) by means of a shaft 12 and rotates --in the direction indicated by arrow 13, to bring the image retaining surface thereon past a plurality of xerographic processing stations. Suitable drive means (not shown) are provided to power and coordinate the motion of the various cooperating machine components whereby a faithful reproduction of the original input scene information is recorded upon a sheet 14 of final support material such as paper or the like.
The practice of xerography is well-known in the `;
art, and is the subject of numerous patents and texts, -including~r ~tr~l~h~ rA~v by Schaffert, published in 1965, and ~ by Dessauer and Clark, published in 1965. The various processing stations for pro~
ducing a copy of an original are herein represented in Figure 1 as blocks A to E. Initially~ the drum 10 moves photoconduc-tive surface 11 through charging station A. I~ charging station A an electrostatic charge is placed uniform~ over -~
the photoconductive surface 11 of the drum 10 preparatory to ;
imaging. The charging may-be provided by a corona generating ;
device of a type described in U,S. Patent No. 2,836~725 issued to Vyverberg in 1958. ;~
Thereafter~ the drum 10 is rotated to exposure station B where the charged photoconductive surface 11 is - ?
~()375~3 ::
exposed to a light image of the original input scene information, whereby the charge is selectively dissipated in the light exposed regions to rec0rd the original inpu~ scene in the form of a latent electrostatic image, A suitable exposure system may be of the type described in U.S. Patent No. `~
3,062,110, issued to Shepardson, et al in 1962. After exposure, drum 10 rotates the electrostatic latent image recorded on the photoconductive surfa~e 11 to development station C wherein a conventional developer mix is applied to the photoconductive ~ -surface 11 of the drum 10 rendering the latent image visible.
A suitable development station is disclosed in U.S. Patent No.
3,707,947, issued to Reichart in 1973 The patent describes a magnetic brush development system utilizing a magnetizable developer mix having carrier granules and a toner colorant.
The developer mix is continuously brought through a directional flux field to form a brush thereof. The electrostatic latent image recorded on photoconductive surface 11 is developed by bringing the brush of developer mix into contact therewith.
The developed image on the photoconductive surface 11 is then brought into contact with a sheet 14 of final support material within a transfer statiQn D and the toner image is transferred from the photoconductive surface 11 to the-contacting side of the final support sheet 14. The final support material may be paper~ plastic, etc., as desired.
After the toner image has been transferred to the sheet of .,--'. ~':
final support material 14, the sheet with the image thereon is advanced to a suitable fuser 15 which coalesces the trans~
ferred powder image thereto, One type of sutable fuser is described in U.S, Patent No. 2,701,76S, issued to Codichini, et al in 1955. After the fus~n~ process the sheet 14 is advanced by rolls 16 to catch tra~ 17 for subsequent removal therefrom by the machine operator, 6 - ;
, .
~37S43 : ~"
Although a preponderan~e of the toner pow~er is transferred to the final support material 14, invariably some ;~
residual toner remains on the photoconductive surface ll after .~.
the transfbr of toner pow~er image to the final support material ~
14. The residual toner particles remainingn~the photoconduc- :
tive surface ll after the transfer operation are removed from the drum 10 as it moves through cleaning station E. The neutralized toner particles are then mechanically cleaned from -. -the photoconductive surface ll by conventional means as, for `
example~ the use of a brush as set forth in U.S. Patent No.
3~572,923, issued to Fisher in 1971.
It is believed that the foregoing description is sufficient for purposes of the present application to illus~
trate the general operation of an automatic xerographic copier 1 which can embody the sheet reversing apparatus of the present .
invention.
The sheet reversing apparatus 2 in accordance with .~.
this invention will now be descri~ed in greater detail by ;~
reference to Figures l th~ough 3. The sheet reversing apparatus 2 comprises a long web or belt-type member 20 supported between two rolls 21 and 22. The web member 20 is supported between the rolls 21 and 22 by me~ans of a support plate ,23,- The roll 21 comprises the supply roll and is -^ :
driven by a sulta~le means such as motor 24 which is connected to the roll by means of a clutch 25 such as a conventional .~
electromagnetic clutch, Similarly, the roll 22 which comprises .
the storage roll is driven by mea~s of a motor 26 oonnected :~
to the roll through clutch 27. ,;
In the storage mode of operation for thes~heet 3Q reversing apparatus 2~ the storage ro~l 22 is driven and the supply roll 21 is disengaged f~.om its d`rlve~ motor 24 so that the web is unwound from the supply roll and wound up on the :::
:, . i.'.- : . ` ' ' ' ' ' '' : ::`
. . : . , , , , . : .
1~375~3 storage roll. In the sheet delivering mode of operation the supply roll 21 is driven and the storage roll 22 is disconnected f~om its drive motor so that the web member is unwound from the storage roll and wound up on the sup~ly roll. The clut~hes -25 and 27, when disengaged are arranged to provide a frictional ~:
drag on the web member 20 to keep it taut between the rolls 21 ~
and 22. Both the supply roll 21 and the storage roll 22 are ~ :
journaled for rotation in a machine ~rame (not shown). :.
An essential aspect of the present invention com~
prises a recycling member 30 which acts upon the storage web 20 in a ~anne~ which will be described in more detail here- ~.
inafter to provide for delivery of the sheets in a reversed or .
~. :
turned over orientation. Referring to Figure 2, the recycling .~ : :
member 30 is shown in greater detail. It comprises a sub-stantially cylindrical she~l 31 having a longitudinally extending opening 32 therein to provide access to the storage .:
roll 22. A lip 33 is provided extending out tangentially from the shell 31 coextensive with lonitudinal opening 33.
The lip 33 inc~udes at its free end a bulbous rounded po~tion 34 coextensive with the lip 33 which is adapted to eng~ge the ~ .
web 20. End plates 35 and 36 are provided at the respective ends of the shell 31O The sha.ft 28 of the storage roll 22 . .
extends through each of the end plates 35 and 36. The shell .
31 is journaled for rotation about the storage roll shaft 28 by means of bearings 37 in the end plates 35 and 3.6. As aforenoted, the storage roll 22 is connected to a drive motor 26 by me~ns of a suitable clutch 27, The dr~ve for the re~
:
cycling member 30, comprises a gear 38 affixed to end wall . ~ ~
35, which in turn engages the drive ~ear 39 mounted to the .` ~ ;.
shaft of motor 40, The motor 40 is a reversing type motor and is adapted to rotate the drive gear 39 in opposing directions .
.
~;)37S~
as shown by the arrow 41. This motion is transmitted by means of meshin~ gear 38 to the recycling member 30 so that it may be rotated in opposing directions about the storage roll shaft 28 as shown by arrow 42. The recycling member 30 rotates freely about the storage roll sh~t 28 and motion is imparted to it only by means o the drive motor 40 which is locked in position by any conventional means when the member 30 is not being actuated.
Referring now to Figures 1 and 3, the op~ration of the sheet reversing apparatus 2 of the present invention will be illustrated. The copy sheets 14 or original documents 16 after processing on a irst side are fed from the respective processing station D or 17 onto the moving web member 20 ~hich is be~ng unwound from the supply foll 21 and wound onto the storage roll 22. The sheets are caused to adhere ~o the ;~
web member 20 by any conventional means as will be descrihed in more detail hereinafter. The sheets 14 and 16 are trans-ported by the web member 20 until they reach the storage roll -~
22 where they are wound up on the s~orage roll 22. In this manner the sheets 14 or 16 are supported between adjacent layers of the web m~mber 29 for storage.
Referring now to Figure 3, sheet reversing is accomplished by rotating the recycling member 30 as shown in ;~
Figures 3A through 3D. Bu~bous portion 34 of the lip 33 engages the web member 20 so âs to deflect it through an arcuat~ path as the recycling member 30 is rotated in the `
direction shown by arrow 43. As the recycling member 30 is progressively rotated through a portion of one revolution as shown in Figures 3A ~h~ough 3D, the web member 20 is caused to wrap around the shell 31 which acts to support add guide it during the sheet delivering mode o~ operation, A sharp sub-_9 `~
~375g~3 stantially U-shaped bend 44 is formed in the web member 20 between the nip 45 formed between the web and the storage roll 22 and the portion 46 of the web which is supported ~hout the shell 31. This U-shaped portion 44 of the web 20 enhances stripping of the sheets from the web during sheet delivering as will be described in more detail hereinafter. The recycling member 30 is rotated until it achieves an appropriate orienta-tion for sheet delivery to the desired processing station as shown, for example, in Figure 3D.
An examination of Figures 1 and 3 will clearly reveal the sheet reversing action of the apparatus 2 of this invention. The sheets 14 or 16 which have been fed to the web 20 with the processed first side F fac~ng down and the opposing side O contacting the web are fed from the web with the processed first side F facing up and the opposing side O which contacted the web facing down.
In the sheet delivering position as shown in Figure 3D, the supply roll 21 is driven and the storage roll 22 is disengaged, The web member 20 is recoiled on the supply roll 21 and the sheets stored between the adjacent layers of the web 20 on the storage roll 22 are ejected and delivered from the storage roll 22 to the appropriate processing station.
A reproducing machine in accordance with this invention incorporating the sheet reversing apparatus 2 will now be described in greater detail by referenee to Figures 1 and 4. Referring first to the processing station 60 where a light image is created of an original document there is shown an automatic document feeder 61 which is capable of ~eeding ., .
original documents 16 one at a time to a ~iewing platen 62 -;~
wherein a light image of the original input scene information is created for transmission to the charged photoconductive.
surface 11 by means of the scanning light source 63 and lens . - 10 -.. . . . . . . . .
~ ~375~3 :~
64 andrmirro~s 65 and 66 as shown.
The document feeder 61 may have any desired ~;
configuration as are well known in the art. Parti~ularly ~-useful document feeders are described and shown in U. S.
Paten~-tNos. 3,506,257 and 3,567,214~ A document feeder substantially of the t~pe described in U. S. Patent No.
3,506,257 is shown schematically in Figures 1 and 4.
The feeder 61 includes a tray 67 for supporting a stack of original documents 16, a belt feeder 68 adapted to frictionally engage the bottom most document in the tray.
A sheet separator 69 of the friction retard type is located downstream of the belt feeder 68 and is adapted to limit the sheet feeding to a single document at a time. The separator comprises an advancing roll 70 and a retard roll 71. The documents 16 are guided by means of guide plates 72 to a belt transport 73 which positions the document ontthe platen 62.
After the document 15 has been scanned the desired number of times the belt transp0rt 73 is energized to clear the document from the platen 62 and feed it either to the sheet reversing apparatus 2 in accordance with this invention, as shown in Figure 1, or the discharge tray 74 as shown in Figure 4.
Further details of the feeder 61 and its mode of operation including document registration may be obtained by reference to U. S~ Pate~t No. 3,506,257. In the storage mode of operation as shown in Figure 1, the documents 16 are trans-ported off the platen 62 by the belt transport 73 and are then transported to the web 20 by means of pinch rolls 75. A ~ -pivotable gate 76 is provided to close the sheet transport path and guide the sheet 16 into contact w~th the web member 20.
The documents 16 may be affixed to the web member 20 by any desired means such as , fox example r the use of a plurality ~ spaced apart transport rolls similar to those :
` 11 ` :
. . . , , ,; , , . ~ ,: .
~Q37543 shown for feeding the documents ~nto the apparatus 2, Preferably, in accordance with this invention, the documents 16 are tacked or caused to ~dhere to the web 20 electrosta-tically. The electrostatic tacking in accordance with this invention may be provided by any desired means, as for example, those described in U. S. P~tent Nos. 2,576,882 and 3,717,801. The former patent shows electrostatic ta~king of articles to a belt or web type transport device~ The latter patent describes the use of a corona generating device for providing the requisite electrostatic tacking. -In accordance with the embodiment shown in Figure 1, a corona generating device 80 is usad to electrostatically tack the sheets 16 to the web 20. The tacking device 80 is positioned at the entran0e to the sheet r~versing apparatus 2.
The web, in accordance with this invention, is preferably formed of a non-conductive material such as Teflon*
or Mylar* to provide effective electrostatic ta~ging. The electrostatic tacking is effectiYe to maintain the adherence between the sheet 16 and the web 20 even as it ~asses about ~ the curved portion 81 o the conductive support plate 23.
The corona generatingddevice 80 includes a plurality of spaced apart guide wires 82 about its opening to pr~ventithe lead edge of the sheet 16 from jamming into the s~eld of the device and to properly guide the sheet into contact with the web 20.
Referring now to Figure 4, the apparatus 2 is shown in the sheet delivery mode ofooperation. The recyclin~ ~ ;
member 30 has bèen rotated to the sheet delivery position. `
In this positinn the web 20 includes a sharp U-shaped bend portion 44 which acts to strip the sheets 16 from the web 20 as they are fed from the storage roll 22. In operation, sheet delivering is accomplished by disengaging the storage * Trademark ,:.. . . . .
~037543 roll clutch 27 and engaging the supply roll clutch 25 followed by dri~ing the supply roll.21 to unwind the web 20 from the storage roll 22 and rewind it upon the supply roll. As the web 20 is unwound from the storage roll222, the documents 16 .:. '.
which have been sandwiched between the adjacent layers of the web 20 on the storage roll are fed out from the sheet `' ~ , reversing apparatus 2 to the transport belt 73 of the document ::
feeder 61. The transport belt 73 registers the document 16 as it is fed from the web 20 onto the platen 62. The document ` ~, is oriented so that its opposing side is adapted to be scanned to:form.a light.:image thereo.;!in the same'manner in~ !n. . ~ ~' which its first side ~s~acanned.
It is evident that the operation of the sheet reversing apparatus 2 of hhe present invention must be appropriatsly sequenced in order to receive and feed sheets in an appropriately timed relations1l.ip to the operation of ,' the desired processing station. The se~uencing may be ~:
accomplished by ~onventional means, as for example, those ,.
described in U. S. Patent No. 1,838,065.
~ One.,approach, for example, which could be employed ~
is to use sensing devices 83 and 84 to detect the sheets at .-appropriate points in the apparatus 2 to thereby activate .
an appropriate control circuit (not shown) of conventional ' '~
design which would operate t~e apparatus 2 for the desired ,,,: .:
- timed sequences. ,'~
Referring to Figure 1~ in the sheet storage mode=
of operation a sheet 16 exiting from the document feeder 61 is ',: -~
sensed by an optical sensor 33 which signals the control ¢ircuit to activate the sheet reversing apparatus 2 or more specifically to drive the storage roll 22 for a period'~ :
sufficient to affix the sheèt to the we~ 20. In the storage mode of operation thé gate 76 is in its closed position and - 13 ~
1(33754;~
the motor 24 for the-;supply roll 21 i5 disengaged while the motor 26 for the storage roll 22 i5 engaged by means of clutch 27. A selector switch (not shown) is employed to signal the control circuit to select and change modes of operation, namely, sheet storage, sheet delivery and changing from one to the other. The mode cha~ging first includes winding a further portion of the web 20 onto the storage roll 22 to insure that all sheets 16 tacked hbrthe web are wound on the roll prior to rotati~g the recycling member 30. After this period the control circuitry would activate the recycling member 30 causing it to rotate to its sheet delivery position.
After the recycling member 30 has been properly positioned, the storage roll motor 26 would be disengaged from the storage roll 22 and the supply roll motor 24 would be engaged to the supply roll 21 through clutch 25.
Referring to Figure 4, the supply roll motor 24 would then be dxiven until the trailing edge of the sheet 16 is sensed by an optical sensor 84 which signals the control circuit- to provide a timed sequence du~ing which the apparatus ~-~
2 is inactivated to allow the sheet 16 to be registered on the platen 62 and scanned the desired number of times depending on the number o~ copies to be produced. After the scanning has ;~;
been completed,-the supply roll motor 24 would again drive the supply roll 21 to cause a second sheet 16 to be ejected from the storage roll 22 and sensed and processed as in the case of the previous sheet, In this manner sheets 16 can be stored and delivered from the sheet reversing apparatus 2 of this invention in an appropr~ate sequence for processing.
Further, this sequencing of the movement of the web 2~ allows the greatest density of sheets 16 to be stored on the web.
Various types of conventional control circuitr~ and sensing devices could be employed, to obtain the desired sequencing.
' .
~ 14 -:;:, ,, ' ' - , ' ' :
~37S~43 ~
The aforenoted example is meant to bel~erely illustrative, and other approaches could be employed/ as for example~ those set `-forth in V. S. Patent No. 1,838,065.
Referring again to Figures 1 and 4, the operation of the sheet reversing apparatus 2 of the present invention will be described with respect to the handling of the copy sheets 14. The operation of the apparatus 2 for copy sheets 14 is in most respects similar to that for original documents 16, A copy sheet from the stack 90 is separated and trans~
ported therefrom by means of a vacuum transport 91 to a pair of req stration pinch rol~s 92. The pinch rolls 92 feed the sheet 14 in an appropriately timed sequence to the transfer station D of the reproducing machine 1. The developed latent electrostatic image present on the drum 10 is transferred to the sheet 14 under the action of a trans~er corona generating . . .
device 933 Following transfer, the sheet 14 is transported :~ :
by means of pinch rolls 94 through a fusing apparatus 15 and then to pinch rolls 16 which transport the sheet to the sheet ~, reversing apparatus 2. A pivoting gate 95 is positioned to ;
close the sheet transpoxt path and guides the sheet 14 into contact with the storage web 20 to which it is tacked by means of the corona generating device 80 as in accordance .~
with the-doC~-e~ handling apparatus. The sheet 14 tacked .; ~ .
to the stoxage web 20 is then transported to and~wound up on .
the storage roll 22~
In the copy sheet delivery mode of opexationr as shown in Figure 4, therrecycling member 30 has been rotated :-to the sheet delivery position~ The copy sheet 14 lS delivered from the storage roll 22 by unwinding the web 20 therefrom. :
The copy sheet 14 is delivered to the pinch ro~ls 9~ which . :-serve to register the sheet in appropriàte sequence for ;
transfer of the developed image to the opposing side of the ~ ~
- 15 ~ ~ :
~L~375~3 sheet, After image transfer, the shee~ 14 is then transported to the pinch rolls 94 which transport it through the fuser 15, The pivoting gate 95 is now positioned to deflect the sheet 14 so that it will fall into the output tray 17.
The various aspects of the copy sheet ha~dling following delivery from the storage apparatus 2 inc~udi~g transport and registration prior to imaging may be accomplished by any desired means, as for example, those shown and de-scribed in U. S. Patent Nos. 3,615,129 and 3,645,615, In normal operation the sheets 14 or 16 should re~
main tacked to the web 20 as they are fed off the storage -:-roll 22. In order to prevent any possibility of the sheets 14 or 16 adhering to the backside of the storage roll 22 instead of to the original web surface to which they were tacked, preferably some means is provided for stxipping the sheets o~f the roll 22~ as for axample, the use of puffers 100 as shown. The puffers 100 provide a stream of air which is effective to strip the sheets 14 or 16 from the roll 22. While a puffer 100 is preferred in accordance with this invention,....... ; .
2Q other approaches could ba employed as for axample the usa of a detacking corona generatmng device or mechanical stripping fingers, Therefore, in accordance with this invention a sheet reversing apparatus 2 has been provided which is capable of storing/transporting and delivering sheets so that the .~ ~
sheets may be processed on their first and opposing sides.
In a reproducing machine the sheet reversing apparatus may be employed in conjunction with a document feeding apparatus 61 to enable the documents to be imaged on both their first and ~:
3Q opposing sides and similarly it can be employed to enable the copyshheets to be imaged on their first and opposing sides, ~ .
The appar;atu`s of thts in~ëntl'o^n ls a~'àp~ted to mà~e mùltipIe ~ ~:
~ 16 :, ~, . .. .
:103754~
duplex copies of a plurality of originals in a given arrange-ment or single duplex copies of a plurality of originals.
Where multiple copies of the originals are made, the plurality of copy sheets for each original are stored on the storage web in the sequence in which they are made and are delivered from the storage web in the same sequence to the transfer station for imaging on their reverse sides. Where a plurality of copies are made from each respective original document, a suitable sorting apparatus, as are known in the art, can be employed to obtain fully collated copies of the documents or reports.
Storage rolls employed in accordance with this invention are capable of storing in a relatively small volume `
a comparatively large number of documents or copy sheets.
For example, if 200 sheets, 5 mils thick, plus a storage web 5 mils thick, are wound onto a storage roll which is initially 4 inches in diameter, the final diameter of the roller will be approximately 6 inches. The storage capacity of the sheet reversing apparatus of this invention is governed ;~
solely by the diameter of the roll which can be accomodated in the machine.
Preferably, the recycling member is rotated to the sheet delivery position over a path of from about 18~ to about 36~0 and more preferably from about 27~ to about 360. ~-The term "processing" as applied to the work per~
formed on the first and opposing sides of the sheet includes any means or process for acting or operating on the sides of the sheet. The term "sheet reversing" refers to the operation of turning over the sheet with respect to a given point or `~
work station to expose the opposing side of the sheet thereto.
The term "reversed orientation" refers to a sheet which has been turned over with respect to a given point or work station ~ 17 -~375~3 -:
to expose the opposing side of the sheet thereto. The terms "sheet" and "document" as used in this application are meant to include both singular and plural sheets and documents irrespective of whether the berms are expressed in the singular or plural form.
It is apparent that there has been provided in ;
accordance with this invention, a sheet reversing apparatus and a reprodusing machine incorporating the sheet reversing apparatus which fully satisfies the objects, means and advantages set forth hereinbefore. While the invention has been described in conjunction with specific embodiments thereof, it is evident that many al~ernatives, modifications and varia-tions wlll be apparent to those skilled in the art in light of the foregoing description~ Accordingly, it is intended to embraae all ~uch alte~n~tive~, modi~ications and variations ~ ` :
as fall within the splrit and broad saope of the appended claim~
: 3~
~
' ' '' ~ ~ .
~, . . ..
''`,''. ~ '~
,,~,,.: .'' ~' ; :
'' : . . " , ~ : : ~ :
A suitable development station is disclosed in U.S. Patent No.
3,707,947, issued to Reichart in 1973 The patent describes a magnetic brush development system utilizing a magnetizable developer mix having carrier granules and a toner colorant.
The developer mix is continuously brought through a directional flux field to form a brush thereof. The electrostatic latent image recorded on photoconductive surface 11 is developed by bringing the brush of developer mix into contact therewith.
The developed image on the photoconductive surface 11 is then brought into contact with a sheet 14 of final support material within a transfer statiQn D and the toner image is transferred from the photoconductive surface 11 to the-contacting side of the final support sheet 14. The final support material may be paper~ plastic, etc., as desired.
After the toner image has been transferred to the sheet of .,--'. ~':
final support material 14, the sheet with the image thereon is advanced to a suitable fuser 15 which coalesces the trans~
ferred powder image thereto, One type of sutable fuser is described in U.S, Patent No. 2,701,76S, issued to Codichini, et al in 1955. After the fus~n~ process the sheet 14 is advanced by rolls 16 to catch tra~ 17 for subsequent removal therefrom by the machine operator, 6 - ;
, .
~37S43 : ~"
Although a preponderan~e of the toner pow~er is transferred to the final support material 14, invariably some ;~
residual toner remains on the photoconductive surface ll after .~.
the transfbr of toner pow~er image to the final support material ~
14. The residual toner particles remainingn~the photoconduc- :
tive surface ll after the transfer operation are removed from the drum 10 as it moves through cleaning station E. The neutralized toner particles are then mechanically cleaned from -. -the photoconductive surface ll by conventional means as, for `
example~ the use of a brush as set forth in U.S. Patent No.
3~572,923, issued to Fisher in 1971.
It is believed that the foregoing description is sufficient for purposes of the present application to illus~
trate the general operation of an automatic xerographic copier 1 which can embody the sheet reversing apparatus of the present .
invention.
The sheet reversing apparatus 2 in accordance with .~.
this invention will now be descri~ed in greater detail by ;~
reference to Figures l th~ough 3. The sheet reversing apparatus 2 comprises a long web or belt-type member 20 supported between two rolls 21 and 22. The web member 20 is supported between the rolls 21 and 22 by me~ans of a support plate ,23,- The roll 21 comprises the supply roll and is -^ :
driven by a sulta~le means such as motor 24 which is connected to the roll by means of a clutch 25 such as a conventional .~
electromagnetic clutch, Similarly, the roll 22 which comprises .
the storage roll is driven by mea~s of a motor 26 oonnected :~
to the roll through clutch 27. ,;
In the storage mode of operation for thes~heet 3Q reversing apparatus 2~ the storage ro~l 22 is driven and the supply roll 21 is disengaged f~.om its d`rlve~ motor 24 so that the web is unwound from the supply roll and wound up on the :::
:, . i.'.- : . ` ' ' ' ' ' '' : ::`
. . : . , , , , . : .
1~375~3 storage roll. In the sheet delivering mode of operation the supply roll 21 is driven and the storage roll 22 is disconnected f~om its drive motor so that the web member is unwound from the storage roll and wound up on the sup~ly roll. The clut~hes -25 and 27, when disengaged are arranged to provide a frictional ~:
drag on the web member 20 to keep it taut between the rolls 21 ~
and 22. Both the supply roll 21 and the storage roll 22 are ~ :
journaled for rotation in a machine ~rame (not shown). :.
An essential aspect of the present invention com~
prises a recycling member 30 which acts upon the storage web 20 in a ~anne~ which will be described in more detail here- ~.
inafter to provide for delivery of the sheets in a reversed or .
~. :
turned over orientation. Referring to Figure 2, the recycling .~ : :
member 30 is shown in greater detail. It comprises a sub-stantially cylindrical she~l 31 having a longitudinally extending opening 32 therein to provide access to the storage .:
roll 22. A lip 33 is provided extending out tangentially from the shell 31 coextensive with lonitudinal opening 33.
The lip 33 inc~udes at its free end a bulbous rounded po~tion 34 coextensive with the lip 33 which is adapted to eng~ge the ~ .
web 20. End plates 35 and 36 are provided at the respective ends of the shell 31O The sha.ft 28 of the storage roll 22 . .
extends through each of the end plates 35 and 36. The shell .
31 is journaled for rotation about the storage roll shaft 28 by means of bearings 37 in the end plates 35 and 3.6. As aforenoted, the storage roll 22 is connected to a drive motor 26 by me~ns of a suitable clutch 27, The dr~ve for the re~
:
cycling member 30, comprises a gear 38 affixed to end wall . ~ ~
35, which in turn engages the drive ~ear 39 mounted to the .` ~ ;.
shaft of motor 40, The motor 40 is a reversing type motor and is adapted to rotate the drive gear 39 in opposing directions .
.
~;)37S~
as shown by the arrow 41. This motion is transmitted by means of meshin~ gear 38 to the recycling member 30 so that it may be rotated in opposing directions about the storage roll shaft 28 as shown by arrow 42. The recycling member 30 rotates freely about the storage roll sh~t 28 and motion is imparted to it only by means o the drive motor 40 which is locked in position by any conventional means when the member 30 is not being actuated.
Referring now to Figures 1 and 3, the op~ration of the sheet reversing apparatus 2 of the present invention will be illustrated. The copy sheets 14 or original documents 16 after processing on a irst side are fed from the respective processing station D or 17 onto the moving web member 20 ~hich is be~ng unwound from the supply foll 21 and wound onto the storage roll 22. The sheets are caused to adhere ~o the ;~
web member 20 by any conventional means as will be descrihed in more detail hereinafter. The sheets 14 and 16 are trans-ported by the web member 20 until they reach the storage roll -~
22 where they are wound up on the s~orage roll 22. In this manner the sheets 14 or 16 are supported between adjacent layers of the web m~mber 29 for storage.
Referring now to Figure 3, sheet reversing is accomplished by rotating the recycling member 30 as shown in ;~
Figures 3A through 3D. Bu~bous portion 34 of the lip 33 engages the web member 20 so âs to deflect it through an arcuat~ path as the recycling member 30 is rotated in the `
direction shown by arrow 43. As the recycling member 30 is progressively rotated through a portion of one revolution as shown in Figures 3A ~h~ough 3D, the web member 20 is caused to wrap around the shell 31 which acts to support add guide it during the sheet delivering mode o~ operation, A sharp sub-_9 `~
~375g~3 stantially U-shaped bend 44 is formed in the web member 20 between the nip 45 formed between the web and the storage roll 22 and the portion 46 of the web which is supported ~hout the shell 31. This U-shaped portion 44 of the web 20 enhances stripping of the sheets from the web during sheet delivering as will be described in more detail hereinafter. The recycling member 30 is rotated until it achieves an appropriate orienta-tion for sheet delivery to the desired processing station as shown, for example, in Figure 3D.
An examination of Figures 1 and 3 will clearly reveal the sheet reversing action of the apparatus 2 of this invention. The sheets 14 or 16 which have been fed to the web 20 with the processed first side F fac~ng down and the opposing side O contacting the web are fed from the web with the processed first side F facing up and the opposing side O which contacted the web facing down.
In the sheet delivering position as shown in Figure 3D, the supply roll 21 is driven and the storage roll 22 is disengaged, The web member 20 is recoiled on the supply roll 21 and the sheets stored between the adjacent layers of the web 20 on the storage roll 22 are ejected and delivered from the storage roll 22 to the appropriate processing station.
A reproducing machine in accordance with this invention incorporating the sheet reversing apparatus 2 will now be described in greater detail by referenee to Figures 1 and 4. Referring first to the processing station 60 where a light image is created of an original document there is shown an automatic document feeder 61 which is capable of ~eeding ., .
original documents 16 one at a time to a ~iewing platen 62 -;~
wherein a light image of the original input scene information is created for transmission to the charged photoconductive.
surface 11 by means of the scanning light source 63 and lens . - 10 -.. . . . . . . . .
~ ~375~3 :~
64 andrmirro~s 65 and 66 as shown.
The document feeder 61 may have any desired ~;
configuration as are well known in the art. Parti~ularly ~-useful document feeders are described and shown in U. S.
Paten~-tNos. 3,506,257 and 3,567,214~ A document feeder substantially of the t~pe described in U. S. Patent No.
3,506,257 is shown schematically in Figures 1 and 4.
The feeder 61 includes a tray 67 for supporting a stack of original documents 16, a belt feeder 68 adapted to frictionally engage the bottom most document in the tray.
A sheet separator 69 of the friction retard type is located downstream of the belt feeder 68 and is adapted to limit the sheet feeding to a single document at a time. The separator comprises an advancing roll 70 and a retard roll 71. The documents 16 are guided by means of guide plates 72 to a belt transport 73 which positions the document ontthe platen 62.
After the document 15 has been scanned the desired number of times the belt transp0rt 73 is energized to clear the document from the platen 62 and feed it either to the sheet reversing apparatus 2 in accordance with this invention, as shown in Figure 1, or the discharge tray 74 as shown in Figure 4.
Further details of the feeder 61 and its mode of operation including document registration may be obtained by reference to U. S~ Pate~t No. 3,506,257. In the storage mode of operation as shown in Figure 1, the documents 16 are trans-ported off the platen 62 by the belt transport 73 and are then transported to the web 20 by means of pinch rolls 75. A ~ -pivotable gate 76 is provided to close the sheet transport path and guide the sheet 16 into contact w~th the web member 20.
The documents 16 may be affixed to the web member 20 by any desired means such as , fox example r the use of a plurality ~ spaced apart transport rolls similar to those :
` 11 ` :
. . . , , ,; , , . ~ ,: .
~Q37543 shown for feeding the documents ~nto the apparatus 2, Preferably, in accordance with this invention, the documents 16 are tacked or caused to ~dhere to the web 20 electrosta-tically. The electrostatic tacking in accordance with this invention may be provided by any desired means, as for example, those described in U. S. P~tent Nos. 2,576,882 and 3,717,801. The former patent shows electrostatic ta~king of articles to a belt or web type transport device~ The latter patent describes the use of a corona generating device for providing the requisite electrostatic tacking. -In accordance with the embodiment shown in Figure 1, a corona generating device 80 is usad to electrostatically tack the sheets 16 to the web 20. The tacking device 80 is positioned at the entran0e to the sheet r~versing apparatus 2.
The web, in accordance with this invention, is preferably formed of a non-conductive material such as Teflon*
or Mylar* to provide effective electrostatic ta~ging. The electrostatic tacking is effectiYe to maintain the adherence between the sheet 16 and the web 20 even as it ~asses about ~ the curved portion 81 o the conductive support plate 23.
The corona generatingddevice 80 includes a plurality of spaced apart guide wires 82 about its opening to pr~ventithe lead edge of the sheet 16 from jamming into the s~eld of the device and to properly guide the sheet into contact with the web 20.
Referring now to Figure 4, the apparatus 2 is shown in the sheet delivery mode ofooperation. The recyclin~ ~ ;
member 30 has bèen rotated to the sheet delivery position. `
In this positinn the web 20 includes a sharp U-shaped bend portion 44 which acts to strip the sheets 16 from the web 20 as they are fed from the storage roll 22. In operation, sheet delivering is accomplished by disengaging the storage * Trademark ,:.. . . . .
~037543 roll clutch 27 and engaging the supply roll clutch 25 followed by dri~ing the supply roll.21 to unwind the web 20 from the storage roll 22 and rewind it upon the supply roll. As the web 20 is unwound from the storage roll222, the documents 16 .:. '.
which have been sandwiched between the adjacent layers of the web 20 on the storage roll are fed out from the sheet `' ~ , reversing apparatus 2 to the transport belt 73 of the document ::
feeder 61. The transport belt 73 registers the document 16 as it is fed from the web 20 onto the platen 62. The document ` ~, is oriented so that its opposing side is adapted to be scanned to:form.a light.:image thereo.;!in the same'manner in~ !n. . ~ ~' which its first side ~s~acanned.
It is evident that the operation of the sheet reversing apparatus 2 of hhe present invention must be appropriatsly sequenced in order to receive and feed sheets in an appropriately timed relations1l.ip to the operation of ,' the desired processing station. The se~uencing may be ~:
accomplished by ~onventional means, as for example, those ,.
described in U. S. Patent No. 1,838,065.
~ One.,approach, for example, which could be employed ~
is to use sensing devices 83 and 84 to detect the sheets at .-appropriate points in the apparatus 2 to thereby activate .
an appropriate control circuit (not shown) of conventional ' '~
design which would operate t~e apparatus 2 for the desired ,,,: .:
- timed sequences. ,'~
Referring to Figure 1~ in the sheet storage mode=
of operation a sheet 16 exiting from the document feeder 61 is ',: -~
sensed by an optical sensor 33 which signals the control ¢ircuit to activate the sheet reversing apparatus 2 or more specifically to drive the storage roll 22 for a period'~ :
sufficient to affix the sheèt to the we~ 20. In the storage mode of operation thé gate 76 is in its closed position and - 13 ~
1(33754;~
the motor 24 for the-;supply roll 21 i5 disengaged while the motor 26 for the storage roll 22 i5 engaged by means of clutch 27. A selector switch (not shown) is employed to signal the control circuit to select and change modes of operation, namely, sheet storage, sheet delivery and changing from one to the other. The mode cha~ging first includes winding a further portion of the web 20 onto the storage roll 22 to insure that all sheets 16 tacked hbrthe web are wound on the roll prior to rotati~g the recycling member 30. After this period the control circuitry would activate the recycling member 30 causing it to rotate to its sheet delivery position.
After the recycling member 30 has been properly positioned, the storage roll motor 26 would be disengaged from the storage roll 22 and the supply roll motor 24 would be engaged to the supply roll 21 through clutch 25.
Referring to Figure 4, the supply roll motor 24 would then be dxiven until the trailing edge of the sheet 16 is sensed by an optical sensor 84 which signals the control circuit- to provide a timed sequence du~ing which the apparatus ~-~
2 is inactivated to allow the sheet 16 to be registered on the platen 62 and scanned the desired number of times depending on the number o~ copies to be produced. After the scanning has ;~;
been completed,-the supply roll motor 24 would again drive the supply roll 21 to cause a second sheet 16 to be ejected from the storage roll 22 and sensed and processed as in the case of the previous sheet, In this manner sheets 16 can be stored and delivered from the sheet reversing apparatus 2 of this invention in an appropr~ate sequence for processing.
Further, this sequencing of the movement of the web 2~ allows the greatest density of sheets 16 to be stored on the web.
Various types of conventional control circuitr~ and sensing devices could be employed, to obtain the desired sequencing.
' .
~ 14 -:;:, ,, ' ' - , ' ' :
~37S~43 ~
The aforenoted example is meant to bel~erely illustrative, and other approaches could be employed/ as for example~ those set `-forth in V. S. Patent No. 1,838,065.
Referring again to Figures 1 and 4, the operation of the sheet reversing apparatus 2 of the present invention will be described with respect to the handling of the copy sheets 14. The operation of the apparatus 2 for copy sheets 14 is in most respects similar to that for original documents 16, A copy sheet from the stack 90 is separated and trans~
ported therefrom by means of a vacuum transport 91 to a pair of req stration pinch rol~s 92. The pinch rolls 92 feed the sheet 14 in an appropriately timed sequence to the transfer station D of the reproducing machine 1. The developed latent electrostatic image present on the drum 10 is transferred to the sheet 14 under the action of a trans~er corona generating . . .
device 933 Following transfer, the sheet 14 is transported :~ :
by means of pinch rolls 94 through a fusing apparatus 15 and then to pinch rolls 16 which transport the sheet to the sheet ~, reversing apparatus 2. A pivoting gate 95 is positioned to ;
close the sheet transpoxt path and guides the sheet 14 into contact with the storage web 20 to which it is tacked by means of the corona generating device 80 as in accordance .~
with the-doC~-e~ handling apparatus. The sheet 14 tacked .; ~ .
to the stoxage web 20 is then transported to and~wound up on .
the storage roll 22~
In the copy sheet delivery mode of opexationr as shown in Figure 4, therrecycling member 30 has been rotated :-to the sheet delivery position~ The copy sheet 14 lS delivered from the storage roll 22 by unwinding the web 20 therefrom. :
The copy sheet 14 is delivered to the pinch ro~ls 9~ which . :-serve to register the sheet in appropriàte sequence for ;
transfer of the developed image to the opposing side of the ~ ~
- 15 ~ ~ :
~L~375~3 sheet, After image transfer, the shee~ 14 is then transported to the pinch rolls 94 which transport it through the fuser 15, The pivoting gate 95 is now positioned to deflect the sheet 14 so that it will fall into the output tray 17.
The various aspects of the copy sheet ha~dling following delivery from the storage apparatus 2 inc~udi~g transport and registration prior to imaging may be accomplished by any desired means, as for example, those shown and de-scribed in U. S. Patent Nos. 3,615,129 and 3,645,615, In normal operation the sheets 14 or 16 should re~
main tacked to the web 20 as they are fed off the storage -:-roll 22. In order to prevent any possibility of the sheets 14 or 16 adhering to the backside of the storage roll 22 instead of to the original web surface to which they were tacked, preferably some means is provided for stxipping the sheets o~f the roll 22~ as for axample, the use of puffers 100 as shown. The puffers 100 provide a stream of air which is effective to strip the sheets 14 or 16 from the roll 22. While a puffer 100 is preferred in accordance with this invention,....... ; .
2Q other approaches could ba employed as for axample the usa of a detacking corona generatmng device or mechanical stripping fingers, Therefore, in accordance with this invention a sheet reversing apparatus 2 has been provided which is capable of storing/transporting and delivering sheets so that the .~ ~
sheets may be processed on their first and opposing sides.
In a reproducing machine the sheet reversing apparatus may be employed in conjunction with a document feeding apparatus 61 to enable the documents to be imaged on both their first and ~:
3Q opposing sides and similarly it can be employed to enable the copyshheets to be imaged on their first and opposing sides, ~ .
The appar;atu`s of thts in~ëntl'o^n ls a~'àp~ted to mà~e mùltipIe ~ ~:
~ 16 :, ~, . .. .
:103754~
duplex copies of a plurality of originals in a given arrange-ment or single duplex copies of a plurality of originals.
Where multiple copies of the originals are made, the plurality of copy sheets for each original are stored on the storage web in the sequence in which they are made and are delivered from the storage web in the same sequence to the transfer station for imaging on their reverse sides. Where a plurality of copies are made from each respective original document, a suitable sorting apparatus, as are known in the art, can be employed to obtain fully collated copies of the documents or reports.
Storage rolls employed in accordance with this invention are capable of storing in a relatively small volume `
a comparatively large number of documents or copy sheets.
For example, if 200 sheets, 5 mils thick, plus a storage web 5 mils thick, are wound onto a storage roll which is initially 4 inches in diameter, the final diameter of the roller will be approximately 6 inches. The storage capacity of the sheet reversing apparatus of this invention is governed ;~
solely by the diameter of the roll which can be accomodated in the machine.
Preferably, the recycling member is rotated to the sheet delivery position over a path of from about 18~ to about 36~0 and more preferably from about 27~ to about 360. ~-The term "processing" as applied to the work per~
formed on the first and opposing sides of the sheet includes any means or process for acting or operating on the sides of the sheet. The term "sheet reversing" refers to the operation of turning over the sheet with respect to a given point or `~
work station to expose the opposing side of the sheet thereto.
The term "reversed orientation" refers to a sheet which has been turned over with respect to a given point or work station ~ 17 -~375~3 -:
to expose the opposing side of the sheet thereto. The terms "sheet" and "document" as used in this application are meant to include both singular and plural sheets and documents irrespective of whether the berms are expressed in the singular or plural form.
It is apparent that there has been provided in ;
accordance with this invention, a sheet reversing apparatus and a reprodusing machine incorporating the sheet reversing apparatus which fully satisfies the objects, means and advantages set forth hereinbefore. While the invention has been described in conjunction with specific embodiments thereof, it is evident that many al~ernatives, modifications and varia-tions wlll be apparent to those skilled in the art in light of the foregoing description~ Accordingly, it is intended to embraae all ~uch alte~n~tive~, modi~ications and variations ~ ` :
as fall within the splrit and broad saope of the appended claim~
: 3~
~
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~, . . ..
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Claims (50)
- The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:
I. A sheet reversing apparatus for reorienting sheets so that a first side and an opposing side of the sheets may be operated upon comprising:
means for storing said sheets comprising a web wherein the sheets are supported between adjacent layers thereof;
and means acting on said web to deliver therefrom the sheets stored thereon in a reversed orientation, - 2. An apparatus as in Claim 1, wherein said delivering means deflects said web through an arcuate path to reposition the web so that the sheets may be ejected from the storage means with the ppposing side oriented to be operated upon.
- 3. An apparatus as in Claim 2, wherein the deflec-tion of said web is provided by a recyclingmmember which is adapted to rotate from about 180° to about 360°.
- 4. An apparatus as in Claim 1, wherein said web having said sheets supported between adjacent layers thereof is in the form of a storage roll.
- 5. An apparatus as in Claim 4, wherein said web is supported between a supply roll and the storage roll, said storage means further including means for driving said storage roll for winding said web upon said storage roll and storing said sheets between the adjacent layers thereof and means for driving said supply roll for winding said web upon said supply roll and unwinding said web from said storage roll for ejecting said sheets from said storage roll.
- 6. An apparatus as in Claim 5, further including conductive means for supporting said web positioned between said supply roll and said storage roll.
- 7. An apparatus as in Claim 6, further including means for affixing said sheets to said web.
- 8. An apparatus as in Claim 7, wherein said affixing means comprises a corona generating device.
- 9. An apparatus as in Claim 4, wherein said re-cycling member is adapted to form a sharp bend in said web to aid in stripping said sheets from said web during sheet delivery.
- 10. An apparatus as in Claim 9, wherein said recycling member comprises a substantially cylindrical shell having a longitudinally extending opening therein to provide access to said storage means, a lip extending out tangentially from said shell coextensive with said longitudinal opening and a bulbous rounded portion at the free end of said lip coextensive with said lip; said bulbous rounded portion being adapted to engage said web to deflect it about said arcuate path.
- 11. A reproducing apparatus for providing an image on a field side and an opposing side of a copy sheet or sheets comprising:
means for forming an image on said sides of said sheets;
means communicating with said imaging means for storing said sheet following imaging on a first side thereof, and storing means comprising a web wherein the sheet is supported between adjacent layers thereof;
and means acting on said web to deliver therefrom the sheet stored thereon in a reversed orientation to said imaging means so that an image may be formed on the opposing side thereof. - 12. An apparatus as in Claim 11, wherein said delivering means deflects said web through an arcuate path to reposition the web so that the sheets may be ejected from the storage means with the opposing side oriented to be operated upon.
- 13. An apparatus as in Claim 12, wherein the deflection of said web is provided by a recycling member which is adapted to rotate from about 180° to about 360°.
- 14. An apparatus as in Claim 11, wherein said web having said sheets supported between adjacent layers thereof is in the form of a storage roll.
- 15. An apparatus as in Claim 14, wherein said web is supported between a supply roll and the storage roll, said storage means further including means for driving said storage roll for winding said web upon said storage roll and storing said sheets between the adjacent layers thereof and means for driving said supply roll for winding said web upon said supply roll and unwinding said web from said storage roll for ejecting said sheets from said storage roll.
- 16. An apparatus as in Claim 15, further including conductive means for supporting said web positioned between said supply roll and said storage roll.
- 17. An apparatus as in Claim 16, further including means for affixing said sheets to said web.
- 18. An apparatus as in Claim 17, wherein said affixing means comprises a corona generating device.
- 19. An apparatus as in Claim 14, wherein said recycling member is adapted to form a sharp bend in said web to aid in stripping said sheets from said web during sheet delivery.
- 20. An apparatus as in Claim 19, wherein said recycling member comprises a substantially cylindrical shell having a longitudinally extending opening therein to provide access to said storage means, a lip extending out tangentially from said shell coextensive with said longitudinal opening and a bulbous rounded portion at the free end of said lip coextensive with said lip, said bulbous rounded portion being adapted to engage said web to deflect it about said arcuate path.
- 21. In a reproducing apparatus including means for supporting an original document, means for feeding said document to said support means and means for forming an image of said document, the improvement wherein said apparatus includes:
means communicating with said support means for receiving and storing said document after a first side thereof has been imaged, said receiving and storing means comprising a web wherein the document is supported between adjacent layers thereof;
and means acting on said web to deliver therefrom the document stored thereon in a reversed orientation to said support surface for imaging the opposing side thereof. - 22. An apparatus as in Claim 21, wherein said delivering means deflects said web through an arcuate path to reposition the web so that the sheets may be ejected from the storage means with the opposing side oriented to be operated upon.
- 23. An apparatus as in Claim 22, wherein the deflection of said web is provided by a recycling member which is adapted to rotate from about 180° to about 360°.
- 24. An apparatus as in Claim 21, wherein said web having said sheets supported between adjacent layers thereof is in the form of a storage roll.
- 25. An apparatus as in Claim 24, wherein said web is supported between a supply roll and the storage roll, said storage means further including means for driving said storage roll for winding said web upon said storage roll and storing said sheets between the adjacent layers thereof and means for driving said supply roll for winding said web upon said supply roll and unwinding said web from said storage roll for ejecting said sheets from said storage roll.
- 26. An apparatus as in Claim 25, further including conductive means for supporting said web positioned between said supply roll and said storage roll.
- 27. An apparatus as in Claim 26, further including means for affixing said sheets to said web.
- 28. An apparatus as in Claim 27, wherein said affixing means comprises a corona generating device,
- 29. An apparatus as in Claim 24, wherein said recycling member is adapted to form a sharp bend in said web to aid in stripping said sheets from said web during sheet delivery,
- 30. An apparatus as in Claim 29, wherein said recycling member comprises a substantially cylindrical shell having a longitudinally extending opening therein to provide access to said storage means, a lip extending out tangentially from said shell coextensive with said longitudinal opening and a bulbous rounded portion at the free end of said lip coextensive with said lip, said bulbous rounded portion being adapted to engage said web to deflect it about said arcuate path.
- 31. In a reproducing apparatus for forming images on a first and an opposing side of a copy sheet or sheets comprising:
means for supporting an original document having a first and an opposing side;
means for reproducing the original input scene information on said first and opposing sides of said document on the respective first and opposing sides of said copy sheet, the improvement wherein:
a first means communicating with said support means are provided reclaiming and storing said document after a first side thereof has been reproduced, said first reclaiming and storing means comprising a web wherein the document is supported between adjacent layers thereof;
and a first means acting on said first web to deliver therefrom the document stored thereon in a reversed orienta-tion to said support surface for reproducing said opposing side thereof;
and wherein said apparatus further includes a second means for receiving and storing said copy sheet after said first side has been provided with said reproduction of said first side of said document, said second receiving and storing means comprising a web wherein the sheet is supported between adjacent layers thereof;
and a second means acting on aid second web to deliver therefrom the sheet stored thereon in a reversed orientation so that the opposing side thereof may be provided with a reproduction of said opposing side of said document. - 32. An apparatus as in Claim 31, wherein each of said first and second delivering means deflects said first and second webs through an arcuate path to reposition said webs so that the document or sheet respectively may be ejected from each of the first and second storing means with the opposing sides oriented to be operated upon.
- 33. An apparatus as in Claim 32, wherein the deflec-tion of said first and second webs are provided by respective recycling members which are adapted to rotate from about 18°°
to about 360°. - 34. An apparatus as in Claim 31, wherein said first and second webs having said document or sheet supported between adjacent layers thereof are in the form of respective storage rolls,
- 35. An apparatus as in Claim 34, wherein said first and second webs are each supported between a supply roll and the respective storage roll, each of said first and second storage means further including means for driving each of said storage rolls for winding said first and second webs upon said storage rolls and storing said documents or sheet between the adjacent layers thereof and means for driving each of said supply rolls for winding said first and second webs upon said supply rolls and unwinding said webs from said storage rolls for ejecting said document or sheet from said storage rolls.
- 36. An apparatus as in Claim 35, further including a conductive means for supporting each of said first and second webs, said support means being positioned between each of said supply rolls and each of said respective storage rolls.
- 37. An apparatus as in Claim 36, further including a means for affixing said document or sheet to each of said webs.
- 38. An apparatus as in Claim 37, wherein said affixing means comprises corona generating devices.
- 39. An apparatus as in Claim 34, wherein each of said recycling members is adapted to form a sharp bend in each of said webs to aid in stripping said documents or sheets from their respective said webs during sheet delivery.
- 40. An apparatus as in Claim 39, wherein each of said recycling members comprises a substantially cylindrical shell having a longitudinally extending opening therein to provide access to said storage means, a lip extending out tangentially from said shell coextensive with said longi-tudinal opening and a bulbous rounded portion at the free end of said lip coextensive with said lip, said bulbous rounded portion being adapted to engage said web to deflect it about said arcuate path.
- 41. A process of reversing the orientation of a sheet so that a first and an opposing side of the sheet may be operated upon comprising;
storing said sheets on a web wherein the sheets are supported between adjacent layers thereof;
deflecting said web to reposition it so that sheets may be ejected therefrom with the opposing side oriented to be operated upon;
and delivering said sheets from said web. - 42. A process as in Claim 41, wherein said web is deflected through an arcuate path.
- 43. A process as in Claim 42, wherein said arcuate path traverses from about 180° to about 360°,
- 44. An apparatus as in Claim 42, wherein said storing step comprises winding up said web on a roll with said sheets sandwiched between adjacent layers thereof.
- 45. A process as in Claim 44, wherein said delivery step comprises unwinding said web from said roll to eject the sheets therefrom.
- 46. A process as in Claim 45, wherein said delivery step further includes winding up said web upon a supply roll.
- 47. A process as in Claim 46, further including the step of electrostatically tacking said sheets to said web.
- 48. A process as in Claim 47, wherein said step of deflecting said web further includes forming a sharp bend therein which operates to strip said tacked sheets from said web during said delivery step.
- 49. A process as in Claim 48, wherein prior to said storing step said sheets are imaged on said first side and wherein subsequent to said delivery step said sheets are imaged on said opposing side.
- 50. A process as in Claim 48, wherein prior to said storing step a light image of the original input scene information on said first side of said sheet is formed and wherein subsequent to said delivery step a light image of the original input scene information on the opposing side of said sheet is formed.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US390650A US3862802A (en) | 1973-08-22 | 1973-08-22 | Sheet reversing apparatus and a duplex reproducing apparatus employing same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1037543A true CA1037543A (en) | 1978-08-29 |
Family
ID=23543368
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA198,829A Expired CA1037543A (en) | 1973-08-22 | 1974-05-03 | Sheet reversing apparatus and a duplex reproducing apparatus employing same |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US3862802A (en) |
| JP (1) | JPS5742861B2 (en) |
| BE (1) | BE818894A (en) |
| CA (1) | CA1037543A (en) |
| DE (1) | DE2425207C3 (en) |
| FR (1) | FR2257523B1 (en) |
| GB (1) | GB1481429A (en) |
| NL (1) | NL182250C (en) |
| SE (1) | SE406754B (en) |
| SU (1) | SU579954A3 (en) |
Families Citing this family (41)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4098551A (en) * | 1975-02-13 | 1978-07-04 | Canon Kabushiki Kaisha | Both side copying machine |
| US4008956A (en) * | 1975-03-24 | 1977-02-22 | Xerox Corporation | Document handling system for pre-collation copying |
| US3963345A (en) * | 1975-03-24 | 1976-06-15 | Xerox Corporation | Pre-collation copying |
| ES445640A1 (en) * | 1975-03-24 | 1977-11-01 | Xerox Corp | Document handling system |
| DE2521932A1 (en) * | 1975-05-16 | 1976-11-25 | Agfa Gevaert Ag | COPY DEVICE |
| US4080060A (en) * | 1975-08-01 | 1978-03-21 | Addressograph-Multigraph Corporation | Copy system |
| USRE32541E (en) * | 1976-01-15 | 1987-11-10 | Xerox Corporation | Fluidic feeding of documents to an exposure station |
| USRE32284E (en) * | 1976-01-15 | 1986-11-11 | Xerox Corporation | Document storage and transport apparatus |
| CA1083655A (en) * | 1976-06-01 | 1980-08-12 | Gary B. Gustafson | Apparatus for producing collated copies from two sided originals |
| US4099150A (en) * | 1976-06-01 | 1978-07-04 | Eastman Kodak Company | Apparatus for producing duplex collated copies |
| GB1599774A (en) * | 1977-02-10 | 1981-10-07 | Ricoh Kk | Document feeding apparatus |
| US4095979A (en) * | 1977-02-14 | 1978-06-20 | Eastman Kodak Company | Method and apparatus for producing duplex copies |
| CA1105980A (en) * | 1977-02-14 | 1981-07-28 | Alphonse B. Difrancesco | Apparatus for producing collated copies in page sequential order |
| US4512651A (en) * | 1977-07-05 | 1985-04-23 | Eastman Kodak Company | Collating document feeder and reproduction apparatus having copy duplexing capabilities |
| US4459013A (en) * | 1977-08-18 | 1984-07-10 | Xerox Corporation | Duplex/simplex precollation copying system |
| JPS54130939A (en) * | 1978-03-31 | 1979-10-11 | Ricoh Co Ltd | Automatic original feeder for copier |
| US4191465A (en) * | 1978-07-03 | 1980-03-04 | Eastman Kodak Company | Apparatus for producing simplex of duplex copies |
| US4272181A (en) * | 1978-12-29 | 1981-06-09 | International Business Machines Corporation | Electrophotographic printer with duplex printed sheet output |
| US4193685A (en) * | 1979-03-30 | 1980-03-18 | Terminal Data Corporation | Fixed message carrier |
| CH642602A5 (en) * | 1980-07-15 | 1984-04-30 | Ferag Ag | DEVICE FOR STACKING PRINTED PRODUCTS INCLUDED IN THE DOMESTIC FLOW, LIKE NEWSPAPERS, MAGAZINES AND THE LIKE. |
| US4348101A (en) * | 1980-09-30 | 1982-09-07 | Sperry Corporation | Duplex printing apparatus |
| CH652701A5 (en) * | 1981-02-03 | 1985-11-29 | Ferag Ag | METHOD AND DEVICE FOR OBTAINING A LONG-TERM PRESSING EFFECT IN PRINTED PRODUCTS, IN PARTICULAR NEWSPAPERS. |
| CH652105A5 (en) * | 1981-07-15 | 1985-10-31 | Grapha Holding Ag | METHOD AND DEVICE FOR STORING PRINTED SHEETS. |
| US4431303A (en) * | 1981-11-04 | 1984-02-14 | Xerox Corporation | Sheet handling apparatus for use with a very high speed duplicator |
| GB2122973B (en) * | 1982-04-22 | 1986-04-09 | Fuji Xerox Co Ltd | Sheet supplying device for two-sided copying |
| US4487506A (en) * | 1982-08-23 | 1984-12-11 | Xerox Corporation | Reversing roll inverter with bypass capability |
| JPS5875163A (en) * | 1982-09-08 | 1983-05-06 | Canon Inc | Copying machine for serving both for one side and both sides |
| JPS5977454A (en) * | 1983-05-13 | 1984-05-02 | Canon Inc | Both-side copying controller |
| JPS5977455A (en) * | 1983-05-13 | 1984-05-02 | Canon Inc | Both-surface copying machine |
| US4727398A (en) * | 1983-07-22 | 1988-02-23 | Canon Kabushiki Kaisha | Automatic original feeding apparatus |
| US4660963A (en) * | 1985-12-30 | 1987-04-28 | Xerox Corporation | Auto duplex reproduction machine |
| US4708468A (en) * | 1985-12-30 | 1987-11-24 | Xerox Corporation | Self adjusting paper guide |
| US4708462A (en) * | 1985-12-30 | 1987-11-24 | Xerox Corporation | Auto duplex reproduction machine |
| US5028965A (en) * | 1988-09-22 | 1991-07-02 | Minolta Camera Kabushiki Kaisha | Copying system having a sheet refeed device |
| US5099269A (en) * | 1989-02-14 | 1992-03-24 | Minolta Camera Kabushiki Kaisha | Copying apparatus provided with a roll-up type sheet refeeding unit |
| SE501812C2 (en) * | 1992-09-25 | 1995-05-22 | Plannja Hardtech Ab | Safety bar in vehicle |
| US5374049A (en) * | 1994-05-27 | 1994-12-20 | Xerox Corporation | Compact inverter |
| US5415391A (en) * | 1994-05-31 | 1995-05-16 | Xerox Corporation | Low cost compact inverter |
| US6493098B1 (en) | 1996-06-05 | 2002-12-10 | John S. Cornell | Desk-top printer and related method for two-sided printing |
| US6297886B1 (en) * | 1996-06-05 | 2001-10-02 | John S. Cornell | Tandem printer printing apparatus |
| US6476923B1 (en) | 1996-06-05 | 2002-11-05 | John S. Cornell | Tandem printer printing apparatus |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2194808A (en) * | 1938-09-14 | 1940-03-26 | Jr Frank D Pooley | Machine for photographing documents |
| US3222057A (en) * | 1961-11-29 | 1965-12-07 | Joseph M Couri | Apparatus and method for controlling and receiving and/or dispensing paper money |
| US3227444A (en) * | 1963-08-30 | 1966-01-04 | Eastman Kodak Co | Reversal unit for document copying apparatus |
| US3337213A (en) * | 1965-07-02 | 1967-08-22 | Hewlett Packard Co | Transport apparatus |
| US3743200A (en) * | 1970-08-04 | 1973-07-03 | Radiologie Cie Gle | Magazine for bare film sheets for use in x-ray film handling apparatus |
| NL140989B (en) * | 1970-12-07 | 1974-01-15 | Oce Van Der Grinten Nv | COPIER. |
-
1973
- 1973-08-22 US US390650A patent/US3862802A/en not_active Expired - Lifetime
-
1974
- 1974-05-03 CA CA198,829A patent/CA1037543A/en not_active Expired
- 1974-05-24 DE DE2425207A patent/DE2425207C3/en not_active Expired
- 1974-06-20 NL NLAANVRAGE7408315,A patent/NL182250C/en not_active IP Right Cessation
- 1974-07-08 SU SU7402042240A patent/SU579954A3/en active
- 1974-08-14 BE BE147649A patent/BE818894A/en not_active IP Right Cessation
- 1974-08-14 SE SE7410355A patent/SE406754B/en not_active IP Right Cessation
- 1974-08-15 JP JP49093803A patent/JPS5742861B2/ja not_active Expired
- 1974-08-19 GB GB36395/74A patent/GB1481429A/en not_active Expired
- 1974-08-22 FR FR7428891A patent/FR2257523B1/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| BE818894A (en) | 1974-12-02 |
| SE7410355L (en) | 1975-02-24 |
| DE2425207C3 (en) | 1979-07-19 |
| FR2257523B1 (en) | 1978-12-29 |
| NL182250C (en) | 1988-02-01 |
| US3862802A (en) | 1975-01-28 |
| JPS5051332A (en) | 1975-05-08 |
| DE2425207A1 (en) | 1975-02-27 |
| DE2425207B2 (en) | 1978-11-16 |
| NL7408315A (en) | 1974-09-25 |
| GB1481429A (en) | 1977-07-27 |
| FR2257523A1 (en) | 1975-08-08 |
| SE406754B (en) | 1979-02-26 |
| JPS5742861B2 (en) | 1982-09-10 |
| SU579954A3 (en) | 1977-11-05 |
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