US3578859A - Mechanical stripping apparatus - Google Patents

Mechanical stripping apparatus Download PDF

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Publication number
US3578859A
US3578859A US838902A US3578859DA US3578859A US 3578859 A US3578859 A US 3578859A US 838902 A US838902 A US 838902A US 3578859D A US3578859D A US 3578859DA US 3578859 A US3578859 A US 3578859A
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US
United States
Prior art keywords
sheet
platen
contact
drum
finger
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 - Lifetime
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US838902A
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English (en)
Inventor
William K Stillings
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xerox Corp
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Xerox Corp
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Filing date
Publication date
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Application granted granted Critical
Publication of US3578859A publication Critical patent/US3578859A/en
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    • 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
    • G03G15/65—Apparatus which relate to the handling of copy material
    • G03G15/6532—Removing a copy sheet form a xerographic drum, band or plate
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S271/00—Sheet feeding or delivering
    • Y10S271/90—Stripper

Definitions

  • This invention generally relates to xerography, and, in particular, to apparatus for stripping a final support material having an electrostatically transferred toner image thereon from a moving photoconductive surface.
  • this invention relates to apparatus which is particularly well adapted to removing an insulating copy sheet having an electrostatically transferred toner image loosely adhered thereto from the top surface of a moving photoconductor.
  • a photoconductive surface is unifonnly charged and the charged surface then exposed to a light image of an original to be reproduced. Under the in- 'fluence of the light image, the charge on the surface is selectively dissipated to produce what is known as a latent electrostatic image.
  • the charged latent image is developed, or made visible, by attracting oppositely charged toner particles, which are brought into close proximity to the plate surface, into the image areas.
  • the developed image is then generally transferred to a final support material and the image affixed thereto to form a permanent record of the original document.
  • An insulating material such as paper, is more conveniently utilized as the final support material in the xerographic art.
  • the copy sheet is placed over the image bearing photoconductive surface and the backside of the sheet subjected to a spray of ionized air.
  • a charge is built up on the sheet having a magnitude and polarity sufficient to electrostatically attract the toner particles from the photoconductive surface to the copy sheet.
  • a charge opposite to the charge found in the nonimaged areas on thedrum surface is induced in the paper causing the copy sheet to become electrostatically tacked to the drum surface. Removal of the copy sheet and the toner image loosely adhering thereto has long been a problem in the xerographic art.
  • Electrostatic stripping a method of stripping in which the electrostatic tacking forces holding the support material to the photoconductive surface are eliminated or neutralized by subjecting the support material to a second corona discharge of sufficient magnitude and polarity to overcome the electro' static bond holding the sheets to the photoconductive surface technique, the insulating copy sheet, loosely supporting a transferred toner image, is moved past a detacking corotron. After the electrostatic charge bonding the sheet to the drum is neutralized, the copy sheet is allowed to fall under the forces of gravity away from the photoconductive surface. The sheet is then picked up by forwarding means and advanced to a subsequent processing station.
  • the operation must be performed while the photoconductor is in an inverted position so that the copy sheet does not fall back into contact with the photoconductive surface.
  • Yet another object of this invention is to improve sheet stripping apparatus whereby a copy sheet can be readily removed from the upper portion of a rotating xerographic drum surface.
  • a still further object of this invention is to reduce the dirt level in automatic xerographic machines.
  • V the present invention are attained by means of a thin wedgeshaped stripper finger riding in contact with a moving photoconductive surface and being arranged so that the apex of the wedge moves between the surface and a copy sheet electrostatically tacked thereto to lift the leading edge of the sheet and direct the sheet away from the moving surface, a stationary transport having a flat smooth working surface thereon supported in close proximity to the stripper and positioned to intercept the leading edge of a stripped sheet and direct the sheet towards a subsequent processing station, vacuum means arranged to pull the contacting sheet away from the stripper finger to hold the sheet in intimate contact with the platen wherein further movement of the surface causes the sheet to slide along the platen and to be pulled from the surface, and means to remove the stripper finger from contact with the photoconductive surface.
  • FIG. I illustrates schematically an automatic xerographic reproducing apparatus employing a preferred embodiment of the paper stripping apparatus of the present invention
  • FIG. 2 is a partial side elevation in section of the stripping mechanism shown in FIG. 1 illustrating the leading edge of a copy sheet being lifted from a rotating drum surface;
  • FIG. 3' is a partial side elevation in section of the stripping mechanism shown in FIG. 1 illustrating a copy sheet being advanced along the stationary transport and showing the stripping finger moved out of contact with the rotating drum surface;
  • FIG. 4 is a partial perspective view illustrating the stripping finger support and lifting mechanism
  • FIG. 5 is a sectional view illustrating the internal construction of the stationary transport.
  • the automatic xerographic reproducing apparatus comprises a xerographic plate including a photoconductive layer of a light receiving surface 10 placed on a conductive backing and formed in the shape of a drum, generally designated 11, which is joumaled for rotation in the frame of the machine (not shown) about the horizontal axis of shaft 12.
  • the xerographic plate is rotated in the direction indicated to cause a photoconductive surface to pass sequentially through a plurality of xerographic processing stations.
  • a charging station A in which a uniform electrostatic charge is deposited on the photoconductive layer on the xerographic drum; an exposure station B, wherein light or radiation pattern of an original document to be reproduced is projectedonto the drum surface to dissipate the charge found thereon in the exposed areas to form a latent electrostatic image;
  • a development station C at which a xerographic developing material having toner particles possessing an electrostatic charge opposite to the charge found on the drum surface in the latent image areas are cascaded over the moving drum surface whereby the toner particles adhere to the electrostatic latent image thus making the image visible in the configuration of the original document to be reproduced;
  • a transfer station D in which the xerographic powder image is electrostatically transferred from the drum surface to a .final support material and the final support material removed from the drum surface;
  • drum cleaning and toner collecting station E wherein the drum surface is first treated with corona and then wiped with a doctor blade to remove any residual toner particles remaining thereon after image transfer and collected for reuse in the xerographic process and wherein the drum surface is exposed to an incandescent panel to effect substantially complete discharge of any residual electrostatic charge remaining thereon.
  • the charging station is preferably located at near the bottom or 6 o'clock drum position which is generally referenced A in FIG. ll.
  • the charging arrangement consists of a corona charging device 13 including a corona discharge array of one or more corona discharge electrodes extending transversely across the drum surface and which are energized from a high potential source (not shown).
  • the corona discharge electrode is substantially enclosed within a shielding member and is adapted to generate a charge confined to the specific exposure area.
  • the optical scanning and projecting assembly comprises a stationary transparent copy board M adapted to support the original to be copied, an illuminating means LMP-l to uniformly illuminate the original supported on the copy board, an optical scanning system including an object mirror 16 and an image mirror l8 having lens 17 and being arranged in light projecting relationship with the moving drum surface to project successive incremental areas of the original onto the drum surface.
  • the lens element is positioned beneath the copy board and is arranged to move through a path of travel parallel to the plane of the copy board whereby the subject image of the original is scanned in timed relation to the movement of the light receiving drum surface.
  • a de ⁇ eloping station C in which is positioned developing apparatus 20 including a housing 28 having a lower sump portion therein capable of supporting a quantity of two-component developer material.
  • a bucket-type conveyor 27, having any suitable drive means associated therewith, is employed to carry the developer material from the sump area to the upper part of the developer housing where it is deposited into hopper 29.
  • the developer material moves downwardly into contact with the upwardly moving photoconductive drum surface where the toner particles are deposited on the image areas in relation to the charge found thereon to form a developed xerographic image.
  • the unused developer material passes from the development zone back into the lower portion of the developer housing where fresh xerographic toner material is supplied in proportion to the amount deposited on the drum surface from dispensing bottle 21.
  • the image transfer station D Positioned next and adjacent to the developing station is the image transfer station D. Individual sheets of final insulating copy sheets are fed seriatim into the sheet registering and forwarding apparatus 22 from either upper feed tray 35 or lower feed tray 34. Once registered, the sheets are advanced from the register stop rolls 52, 53 into moving contact with the drum surface. The developed image is often then electrostatically transferred from the drum to a copy sheet by means of transfer corotron 24. As will be explained in greater detail below, the sheet is stripped from the drum surface and forwarded along stationary transport 26 into fuser assembly 30.
  • the image bearing support material stripped from the drum surface is forwarded along stationary transport 26 into the nip between upper fuser roll 31 and lower fuser roll 32. As the roll is rotated in the direction indicated, the rolls deliver both pressure and heat energy stored therein to the copy sheet to fix th image to the support material.
  • the fused copy sheet After leaving the fuser assembly, the fused copy sheet is transported through a curved path into a movable guide and drive roll assembly 36.
  • the movable guides can be prepositioned' to either feed a sheet delivered from the fuser into upper feed tray 35 or into a discharge catch tray 37.
  • the machine can be programmed by means of its control logic system to precondition the paper handling equipment to accept simplex copy into the upper tray 35 from which the copy is once again reprocessed as explained above, through the xerographic transfer station to form a duplex image thereon.
  • the next and final station in the automatic xerographic reproducing apparatus is a drum cleaning and toner recovery station E at which time residual toner on the drum surface is first subjected to a corona generating device 39 which acts to neutralize the electrostatic bond holding the residual toner to the drum station.
  • the residual toner on the drum is then transported into toner cleaning and recovery housing 40 where the residual is removed from the drum surface by means of a doctor blade (not shown).
  • the removed toner is conveyed longitudinally along the drum surface by means of a screw conveyor and deposited in the collecting area in housing 40.
  • the collected toner is then transported through conveyor tubes 41 back into the developer housing by means of an endless chain belt.
  • a paper support material 50 is first fed from either of the two supply trays 34, 35 (FIG. 1) into stop means 51 of sheet registering roll 52.
  • the forward movement of the leading edge of the individual sheet is momentarily interrupted by the stops for a period of time to allow the edge of the sheet to be properly aligned against the stop.
  • Pinch rolls 53 are then cammed into friction driving contact with the sheet and through means of a control mechanism acting through gears 54 and 55 the sheet rapidly accelerated to drum speed.
  • auxiliary drive means continue to advance the sheet into contact with the drum surface so that the drum and the copy sheet move into transfer station D at the same linear speed.
  • a transfer corotron 24 is positioned in the transfer station just downstream from the point at which the paper insulating sufficient strength on the backside of the copy sheet to attract the toner particles from the drum surface to the insulating material.
  • the transfer corotron also-tends to build a uniform charge overlying the nonimaged areas on the drum surface.
  • the transfer emissions accepted by the paper in regions overline these nonimaged areas induce a charge in the paper opposite that found in the substrate portion of the xerographic drum.
  • the net charge distribution therefore, in the nonimage areas creates an electrostatic attraction which tacks the support material to the drum surface.
  • the total'charge between various copy sheets and xerographic surfaces may vary in proportion to the total amount of nonimaged areas available which can accept a charge. For instance, when the copy has relatively small image areas thereon, the background area is increased to thereby increase the total electrostatic attraction between the paper and the drum. Conversely, when large solid area portions are being developed and transferred-there is a minimum of background area and as such the total amount of induced electrostaticattraction between the insulating material and the drum is proportionally minimized.
  • a puffer adapted to separate copy from a drum must be capable of separating the strongest charge bond possible if it is to function correctly. However, maximum puffing pressures acting on sheets with a minimum bond often time result in image smears. Furthermore, maximum puffing pressures also increase the amount of dirt produced by increasing the amount of toner particles broadcast throughout the machine.
  • the image bearing copy sheet which is now tacked to the drum surface, is forwarded from under the transfer corotron 24 and the copy sheet is now in a condition to be stripped.
  • lnitial sheet stripping is accomplished in the present invention ;by means of a stripper finger 25.
  • the finger is fabricated from a relatively thin material having nonstick or adhesive properties so that the finger will ride freely on the drum surface in nonfriction contact therewith.
  • the finger is supported upon a shafti60 with the thin member in substantially perpendicular relationship to the drum surface. As shown in FIG. 4, the finger is rotatably supported on the free end of the shaft between stationary member 61 and retaining member 62.
  • the stripper finger is movably supported in the shaft upon a screw 63 passing through an elongated aperture 64 in the finger and the screw threaded in stationary member 61.
  • the top of the elongated aperture rests upon screw 63 to support'the finger as shown in FIG. 4.
  • shaft 60 is journaled for rotation intthe sidewalls of support housing 68 and the housing, in tum, supported by mounting bracket 69 which is secured to the machine frame by screws 67 (P16. 2).
  • Mounting bracket 69 also carries a dependent horizontal support flange 70 in which is secured solenoid SOL-1.
  • the solenoid is single acting device which is arranged to act in opposition to torsion spring 72.
  • Spring 72 is coupled to shaft 60 by means of coupling member 74.
  • a crank arm 71 is secured to one end to shaft 60 with the opposite end of the crank pinned to actuating arm 73 of solenoid SOL-1. With the solenoid deenergized, torsion spring 72 is allowed to assume its equilibrium position.
  • the spring acting through coupling 74 normally supports the finger above the drum as illustrated in FIG. 3. Energization of solenoid SOL-1, pulls crank arm 71 downwardlyto move the stripper finger to a second drum contacting position as shown in FIG. 2.
  • solenoid SOL-l is energized by means of the machine logic circuitry (not shown) to move the stripper finger 25 down into contact withthe rotating drum surface just prior to the arrival of the leading edge of a copy sheet.
  • the stripper finger is basically shaped in the form of a wedge and is positioned in the machine so that the apex of the wedge moves between the copy sheet and the rotating drum I which. in turn, extends longitudinally substantially across the width of the platen.
  • the platen 78 forms the bottom of a housing 79 in which is located a vacuum chamber 80 (HO.
  • the vacuum chamber 80 is connected to a vacuum pump (not shown) through tubing 82 connected to exhaust port 81.
  • the top of the vacuum chamber is described by an incline baffle 86 which acts to uniforrnly decrease the cross-sectional area of the vacuum chamber as you move away from the exhaust port 81. The decrease in area is related proportionally to the head loss in negative pressure across the chamber so that a substantially uniform pressure is maintained at exhaust port 89.
  • solenoid SOL-1 is deenergized allowing torsion spring 72 to return to its equilibrium position thereby lifting stripper finger 25 away from the drum surface.
  • the copy sheet is held in sliding relationship with the flat platen 78 so that further rotation of the drum surface advances the copy sheet along the platen towards the next subsequent processing station.
  • the negative-pressure acting on the sheet permits the copy sheet to be freely moved along the stationary platen, it nevertheless is strong enough to pull or strip the electrostatically tacked copysheet from the drum surface.
  • the copy sheet is forwarded between upper fuser roll 31 and lower fuser roll 32 of fuser assembly 30.
  • Lower fuser roll 32 is coated with an elastomeric resilient material of a lower durometer than the coating placed on upper fuser roll 31. with the rolls placed in a cooperative pressure driving condition, as shown-in HQ. 2, contact between the roll is maintained over several degrees of arc.
  • a radiant heat source 33 is placed in close proximity with the lower fuser roll and functions to maintain the surface of the roll as a temperature sufficient to heat fuse the toner image supported on the copy sheet. The fuser rolls are rotated so that the copy sheet being forwarded along platen 78 and the rolls are moving at the same linear speed.
  • the trailing edge of the sheet is free to pass, through the transfer station. Because either the trailing'edge or leading edge of the sheet is being positively driven at sometime during the transfer and stripping operation the present apparatus is fully able to handle cut sheets of support material.
  • the only limitation as to the size sheet that can be handled by the apparatus of the present'invention is the distance that the fuser rolls are located from the transfer station, which in practice is relatively short.
  • a switch 83 is mounted within transport housing 79 above vacuum chamber 80.
  • Switch actuator arm 84 passes through the vacuum chamber and platen 78 and extends into the copy sheet path of travel.
  • Switch 83 functions as a sensing device to detect the passage of a copy-sheet through the transport station. Failure of a copy sheet to pass through the station at a predetermined time indicated to the machine control circuitry that a misfeed has occurred causing the machine to be shutdown.
  • a xerographic transfer device of the type wherein an insulating sheet is electrostatically tacked to a moving image support member by means of a corona generating device apparatus to remove the tacked sheet from the moving member including: i
  • a thin wedge-shaped finger positioned substantially perpendicular to the image support surface of the member with 'the apex of the wedge being arranged to lift the leading edge of the electrostatically tacked sheet from the member and direct the sheet away from said surface
  • a stationary transport supported in close proximity to said finger to intercept the leading edge of the stripped sheet and further direct said sheet along a predetermined path of travel
  • vacuum means associated with said transport to lift said sheet directly into contact therewith from said wedgeshaped finger and support the sheet in intimate sliding contact with said transport.
  • Apparatus for transferring a developed toner image from a horizontally supported rotating image support including:
  • a corona generator positioned adjacent to the top of said rotating drum and being arranged to s ray the back of said sheet moving in contact with said rum with an ion discharge of a polarity and strength sufficient to transfer toner material from the drum surface to the support material
  • a stripper hinge positioned adjacent said corona generating device in the direction of drum rotation and being adapted to ride in contact with the drum surface to move between the drum surface and the support sheet wherein the sheet is lifted from the rotating surface and directed upwardly away from said surface
  • a stationary platen supported in close proximity to said stripper finger to intercept the leading edge of the upwardly moving sheet and direct said sheet along a predetermined path of travel
  • a vacuum port extending across said platen transverse to the direction of sheet travel and being positioned behind the point on said platen where the leading edge of the sheet is intercepted
  • the apparatus of claim 10 further including means to lift said stripper finger from the drum surface when said sheet is lifted into close sliding contact with said platen.
  • the apparatus of claim 12 further including subsequent sheet advancing means to engage a sheet directed along the predetermined path of travel and further forward said sheet.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
  • Electrostatic Charge, Transfer And Separation In Electrography (AREA)
  • Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
  • Paper Feeding For Electrophotography (AREA)
US838902A 1969-07-03 1969-07-03 Mechanical stripping apparatus Expired - Lifetime US3578859A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US83890269A 1969-07-03 1969-07-03

Publications (1)

Publication Number Publication Date
US3578859A true US3578859A (en) 1971-05-18

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Family Applications (1)

Application Number Title Priority Date Filing Date
US838902A Expired - Lifetime US3578859A (en) 1969-07-03 1969-07-03 Mechanical stripping apparatus

Country Status (12)

Country Link
US (1) US3578859A (de)
JP (1) JPS4931335B1 (de)
BE (1) BE752938A (de)
CA (1) CA922771A (de)
CH (1) CH523150A (de)
DE (1) DE2032371C3 (de)
ES (1) ES381384A1 (de)
FR (1) FR2054091A5 (de)
GB (1) GB1296763A (de)
NL (1) NL168962C (de)
PL (1) PL81340B1 (de)
SE (1) SE366849B (de)

Cited By (38)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3774907A (en) * 1971-09-16 1973-11-27 Xerox Corp Vacuum sheet stripping apparatus
US3784190A (en) * 1971-12-27 1974-01-08 Ibm Sheet removing apparatus
JPS4914440U (de) * 1972-05-11 1974-02-06
US3791729A (en) * 1972-07-11 1974-02-12 Xerox Corp Apparatus for monitoring a sheet transport mechanism
US3797929A (en) * 1973-01-29 1974-03-19 Sperry Rand Corp Gripper-bar bumper pads
US3804401A (en) * 1972-10-30 1974-04-16 Xerox Corp Pneumatic stripping apparatus
US3837640A (en) * 1972-11-13 1974-09-24 Xerox Corp Stripper finger with air cushion
US3850519A (en) * 1973-01-12 1974-11-26 Xerox Corp Xerographic image transfer apparatus
US3851962A (en) * 1973-08-29 1974-12-03 Savin Business Machines Corp Electrostatic hold down apparatus
US3856462A (en) * 1973-10-18 1974-12-24 Xerox Corp Reproduction machine fuser
JPS49149750U (de) * 1973-04-25 1974-12-25
US3857560A (en) * 1973-07-23 1974-12-31 Xerox Corp Adhesive paper pick-off system
JPS505644U (de) * 1973-05-10 1975-01-21
JPS5011537U (de) * 1973-05-28 1975-02-06
JPS5061039U (de) * 1973-10-03 1975-06-05
JPS5075341U (de) * 1973-11-10 1975-07-01
JPS5094717U (de) * 1973-12-21 1975-08-08
JPS50156938A (de) * 1974-06-07 1975-12-18
US3960446A (en) * 1973-05-08 1976-06-01 Minolta Camera Kabushiki Kaisha Electrostatic copying apparatus
US3992000A (en) * 1974-11-20 1976-11-16 Xerox Corporation Sheet stripper
US4013359A (en) * 1974-08-23 1977-03-22 Pitney-Bowes, Inc. Electrostatic copier including means for detaching paper from a photoconductor
US4017067A (en) * 1976-07-20 1977-04-12 Xerox Corporation Transfer-fusing speed compensation
US4017065A (en) * 1976-04-29 1977-04-12 Xerox Corporation Transfer-fusing speed compensation
JPS5263044U (de) * 1975-11-06 1977-05-10
US4058306A (en) * 1976-05-24 1977-11-15 Xerox Corporation Detack and stripping system
US4084806A (en) * 1976-11-10 1978-04-18 Eastman Kodak Company Sheet handling apparatus
US4265445A (en) * 1979-06-08 1981-05-05 Langner Fred R Photocopier collator
US4278341A (en) * 1979-07-09 1981-07-14 Nashua Corporation Sheet stripping apparatus
US4288070A (en) * 1979-06-08 1981-09-08 Langner Fred R Chute return mechanism for a photocopier collator
US4320953A (en) * 1977-12-07 1982-03-23 Savin Corporation Pick-off device for electrostatic copier
US4387981A (en) * 1980-12-23 1983-06-14 Nashua Corporation Sheet stripping apparatus and method
USRE32422E (en) * 1977-02-14 1987-05-19 Eastman Kodak Company Method and apparatus for producing duplex copies
US4806985A (en) * 1986-07-11 1989-02-21 Xerox Corporation Stripper fingers
US4828713A (en) * 1988-03-15 1989-05-09 Betz Laboratories, Inc. Boiler water treatment
EP0578901A1 (de) * 1992-07-16 1994-01-19 BULL HN INFORMATION SYSTEMS ITALIA S.p.A. Elektrophotographisches Druckgerät
US20040151521A1 (en) * 2003-01-30 2004-08-05 Xerox Corporation Intermittent stripper fingers and baffle for stripping copy media from a heated fuser roll
US20050156377A1 (en) * 2004-01-21 2005-07-21 Xerox Corporation Fuser sheet stripping system
US11119433B2 (en) * 2019-05-11 2021-09-14 Canon Kabushiki Kaisha Image forming apparatus

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US3215056A (en) * 1963-06-28 1965-11-02 Addressograph Multigraph Automatic copying machine
US3459477A (en) * 1966-03-07 1969-08-05 Electrocopy Corp Copy machine and method of electrostatic copying

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US3138374A (en) * 1961-08-07 1964-06-23 Frederick Post Co Pick-up and separating apparatus
US3409367A (en) * 1962-07-31 1968-11-05 Dietzgen Co Eugene Apparatus for making prints
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US2895552A (en) * 1955-08-10 1959-07-21 John Waldron Corp Transverse web cutting apparatus having sheet delivery mechanism using timed vacuum belts
US3215056A (en) * 1963-06-28 1965-11-02 Addressograph Multigraph Automatic copying machine
US3459477A (en) * 1966-03-07 1969-08-05 Electrocopy Corp Copy machine and method of electrostatic copying

Cited By (45)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3774907A (en) * 1971-09-16 1973-11-27 Xerox Corp Vacuum sheet stripping apparatus
US3784190A (en) * 1971-12-27 1974-01-08 Ibm Sheet removing apparatus
JPS4914440U (de) * 1972-05-11 1974-02-06
US3791729A (en) * 1972-07-11 1974-02-12 Xerox Corp Apparatus for monitoring a sheet transport mechanism
US3804401A (en) * 1972-10-30 1974-04-16 Xerox Corp Pneumatic stripping apparatus
JPS49102350A (de) * 1972-10-30 1974-09-27
US3837640A (en) * 1972-11-13 1974-09-24 Xerox Corp Stripper finger with air cushion
US3850519A (en) * 1973-01-12 1974-11-26 Xerox Corp Xerographic image transfer apparatus
US3797929A (en) * 1973-01-29 1974-03-19 Sperry Rand Corp Gripper-bar bumper pads
JPS49149750U (de) * 1973-04-25 1974-12-25
US3960446A (en) * 1973-05-08 1976-06-01 Minolta Camera Kabushiki Kaisha Electrostatic copying apparatus
JPS505644U (de) * 1973-05-10 1975-01-21
JPS5011537U (de) * 1973-05-28 1975-02-06
JPS5815935Y2 (ja) * 1973-05-28 1983-03-31 キヤノン株式会社 デンシフクシヤキ ニオケル テンシヤザイブンリソウチ
US4050691A (en) * 1973-05-28 1977-09-27 Canon Kabushiki Kaisha Separator device in a copying machine
US3857560A (en) * 1973-07-23 1974-12-31 Xerox Corp Adhesive paper pick-off system
US3851962A (en) * 1973-08-29 1974-12-03 Savin Business Machines Corp Electrostatic hold down apparatus
JPS5061039U (de) * 1973-10-03 1975-06-05
US3856462A (en) * 1973-10-18 1974-12-24 Xerox Corp Reproduction machine fuser
JPS5075341U (de) * 1973-11-10 1975-07-01
JPS5094717U (de) * 1973-12-21 1975-08-08
JPS50156938A (de) * 1974-06-07 1975-12-18
JPS5438896B2 (de) * 1974-06-07 1979-11-24
US4013359A (en) * 1974-08-23 1977-03-22 Pitney-Bowes, Inc. Electrostatic copier including means for detaching paper from a photoconductor
US3992000A (en) * 1974-11-20 1976-11-16 Xerox Corporation Sheet stripper
JPS5263044U (de) * 1975-11-06 1977-05-10
JPS5539410Y2 (de) * 1975-11-06 1980-09-13
US4017065A (en) * 1976-04-29 1977-04-12 Xerox Corporation Transfer-fusing speed compensation
US4058306A (en) * 1976-05-24 1977-11-15 Xerox Corporation Detack and stripping system
DE2723426A1 (de) * 1976-05-24 1977-12-08 Xerox Corp Abloese- und abstreifvorrichtung fuer ein bildempfangsmaterial in einem elektrostatographischen kopiergeraet
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Also Published As

Publication number Publication date
GB1296763A (de) 1972-11-15
CH523150A (de) 1972-05-31
SU443525A3 (ru) 1974-09-15
NL7009831A (de) 1971-01-05
DE2032371C3 (de) 1980-03-20
NL168962C (nl) 1982-05-17
DE2032371B2 (de) 1979-07-05
CA922771A (en) 1973-03-13
DE2032371A1 (de) 1971-01-21
BE752938A (de) 1971-01-04
PL81340B1 (de) 1975-08-30
NL168962B (nl) 1981-12-16
JPS4931335B1 (de) 1974-08-21
SE366849B (de) 1974-05-06
ES381384A1 (es) 1972-12-01
FR2054091A5 (de) 1971-04-16

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