US3702482A - Bias roll transfer - Google Patents
Bias roll transfer Download PDFInfo
- Publication number
- US3702482A US3702482A US100969A US3702482DA US3702482A US 3702482 A US3702482 A US 3702482A US 100969 A US100969 A US 100969A US 3702482D A US3702482D A US 3702482DA US 3702482 A US3702482 A US 3702482A
- Authority
- US
- United States
- Prior art keywords
- blanket
- roll
- transfer
- resistivity
- transfer 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 - Lifetime
Links
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Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G13/00—Electrographic processes using a charge pattern
- G03G13/22—Processes involving a combination of more than one step according to groups G03G13/02 - G03G13/20
-
- 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
- G03G15/14—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base
- G03G15/16—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer
- G03G15/1665—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer by introducing the second base in the nip formed by the recording member and at least one transfer member, e.g. in combination with bias or heat
- G03G15/167—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer by introducing the second base in the nip formed by the recording member and at least one transfer member, e.g. in combination with bias or heat at least one of the recording member or the transfer member being rotatable during the transfer
- G03G15/1685—Structure, details of the transfer member, e.g. chemical composition
-
- 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
- Y10S101/00—Printing
- Y10S101/37—Printing employing electrostatic force
Definitions
- a biasable transfer member is herein disclosed suitable for use in transferring xerographic images from a photoconductor to a final support sheet;
- the member is adapted to electrically cooperate with the photoconductor to establish a directional force field therebetween capable of attracting toner from the photoconductor toward the member and features a structure which provides for a more efficient transfer operation while at the same time accurately matching the speed of the support sheet to the photoconductor.
- Thisinvention relates to xerography and, in particu- I lar, to apparatus for transferring xerographic toner 1 images from one support surface to another.
- atphotosensitive plate which consists ofv a photoconductive coating placed 2 over a conductivebacking ischarged uniformly. and the charge plate then exposed to a light image of an 1 original. Under the influence of. the light image, the
- the charge on the plate is selectively, dissipated to record 1 the original input scene information on the plate in the 'form of a latent electrostatic image.
- the latent image is developed, or made visible, n by .1 applying oppositely 5 charged toner particles to the plate surface in a manner sothatthe toner particles are attracted into the imaged areas.
- the developed images are generally transferred from the photoconductor to a final support material, such as paper or the like, and affixed thereto to form a r permanent record of the original.
- the resilient coating have a resistivity of between l0l0 ohms cm.
- the coating in order to give the roll the needed resiliency required in most practical applications, the coating must be relatively thick. A thick coating of high resistivity acts to build up I a surface charge on the roll resulting in air breakdown in the transfer region and eventually copy degradation.
- a biased transfer member being capable of electrically cooperating with a conductive support surface to attract charge toner particles from the support surface towardsthe member, the member having a conductive substrate for supporting a biased "potential thereon, an intermediate blanket placed in contact with the substrate having an electrical resistivity capable of readily transmitting the bias potential on the-substrate to the outer periphery of the blanket and a relatively thin outer coating placed over the blanket having an electrical resistivity to minimize ionization of the atmosphere when thetransferred member is placed in electrical cooperation with the image support surface and provides a good toner release property enabling the device to be cleaned of said toner.
- FIG. 1 is a schematic view in partial section illustrating an automatic xerographic reproducing apparatus embodying the present invention
- 7 I I FIG. 2 is a perspective view inpartial section showing the construction of .a transfer roll embodyingythe teachingsof the present invention that is suitable for with the accompanying drawings
- FIG. 3 isv a partial sectional view showinga paper gripping mechanism associated with the transfer roll illustrated in FIG. 2 with the paper gripper extended in a paper stripping position.
- the apparatus of the present invention has application in any number of xerographic devices in which a plurality of images are to be applied to a single sheetof support material, it will nevertheless be dis closed, for explanatory reasons, with reference to an automatic machine having a duplex capability and it should be clear that this particular machine environment is in no way intended to limit the present invention.
- the drum basically comprises an outer surface 13 of a photoconductive insulating material such as vitreous selenium or the like that is placed upon a grounded conductive substrate 14'.
- a uniform electrostatic charge is placed on the photoconductive surface by means of a conventional corona charging device similar to that disclosed by Vyverberg in the above noted U. S. patent.
- the uniformly charged surface is then moved past an exposure means, generally referenced 17, capable of exposing the charged surface to a flowing light image of the original input scene information to be reproduced thus forming a latent electrostatic image on the photoconductor.
- the optical system herein utilized is similar to that disclosed in U. S. ,Pat. No. 2,940,358 and is of the type wherein the original input scene information to be reproduced is stored as minified data upon a film input 18.
- A' movable mirror system 19 is positioned in the optical light path and is arranged to redirect theflowing light image of the original onto the bottom portion of the drum surface.
- the mirror system comprises a plane mirror surface 20 and a roof mirror 21 which, in operation, are alternately interposed into the light path of the optical system so that each successive image presented to the drum surface is optically reversed.
- the optical means exposes the photoconductive drum to a first input wherein a right reading latent image is formulated thereon. Following the formation of the first right reading latent image, the image is moved past a conventional xerographic developing device 25 wherein the latent image is brought in contact with oppositely charged toner particles and the particles are attracted'into the imaged areas thus making the image visible.
- the now visible first right reading image is transported on the drum to' a transfer station I 26 where the image is temporarily transferred .to and stored in image configuration upon the surface of an intermediate biased transfer roll 30.
- the transfer roll is arranged to extend transversely across the photoconductive drum surface and to move in intimate contact therewith as shown in FIG. 1.
- the. roll which is initially placed ata relatively high bias potential, is arranged to coact electrically. with the grounded photoconductive drum to establish an electrostatic force field. in and about'the contact region.
- the force field is of sufficient strength to attract the charged toner particles moving through. this region from the photoconductive surface towards the transfer member.
- FIG. 2 there is shown a cut-away view of the transfer roll 30 clearly illustrating the internal construction thereof.
- the roll is basically formed upon a rigid hollow cylinder 31 that is fabricated of a conductive metal, such as aluminum or the like, capable of readily responding to a biasing potential placed thereon.
- a rela tively thick intermediate blanket 32 of elastomeric material having a hardness of between 15-25 durometers.
- the intermediate blanket is preferably formed of a polyurethane rubber approximately 0.25 in thickness having sufficient resiliency to allow the roll to deform when brought into moving contact with the photoconductive drum surface to provide an extended contact region in which the toner particles can be transferredbetween the contacting bodies.
- the intermediate blanket should be capable of responding rapidly to the biasing potential to electrically impart the charge potential on the core to the outer extremities of the roll surface.
- the blanket therefore should have a resistivity of blanket is placed a relatively outer coating 33 which is also formed of an elastomeric material being approximately 0.0025 in thickness and having a hardness in the 65-75 D durometer range.
- the outer coating have a resistivityof about 3.2 X 10 ohms cm or, alternatively, in a range between 10 and 10" ohm cm. It is further preferred that the outer coating of the roll should be formulated of a material capable of providing a'relatively smooth surface exhibiting relatively good mechanical release properties'in respect to the toner materials employed.
- a polyurethane material manufactured by the duPont Company under the tradename Adiprene has been found .to possess the heretofore mentioned desired properties and shows extremely good release characteristics in respect to most commercially availabletoners.
- the transfer roll member is closed atboth ends by means of a pair of dielectric end caps 35, 36 which serveto electrically isolate the transfer roll member from the supporting machine frame.
- Segmented shafts 37 are secured in both end caps and are mounted in coaxial alignment with the cylindrical core 31.
- the shafts are joumaled for rotation in the machine frame in bearing means provided (not shown) so that the outer surface of the roll continually moves'through the transfer zone in contact with the photoconductive surface 13.
- a pulley 38 operatively connected to the machines main drive system, is secured to one end of the shaft and causes the transfer roll to be rotated in with the moving shown in FIG.
- a commutating brush 41 which is electrically connected to a suitable source of DC power 42 via electrical connector 43, is arranged to ride in contact with theouter surface of the commutator ring and provides a moving contact by which theconductive core is electrically connected to the biasing source.
- the transfer force field associated with the electrically isolated roll is dependent upon the establishment of a voltage contrast between the roll and the photoconductor. The strength of the field is proportional to the initial charge placed on the roll and inversely proportional to the distance between the two coacting bodies.
- the roll is biased to about 3,500 volts DC, the polarity of which is, of course, opposite to that of the charged toner particles, whereby the first image delivered into the transfer zone is transferred, in image configuration, from the photoconductor to the surface of the-transfer roll.
- the time sequence 'of charging, exposing and- 1 developing the two oppositely .reading images on the drumsurfac e is controlled in predetermined timed rela- 82, preferably paper, are forwarded from a supply bin 'tionf by means of ,the machine-control logic circuitry ;(not shown).
- the machine-control logic circuitry preferably paper
- sheets of individual support material orthelikeintoa sheet'receiving station 83 (FIG. 1) by means of a feed roll assembly27.
- the entire gripping mechanism is sufficientlyretractedbelow the "roll surface to allow the roll to'move freely through the times sequence of operation may be dependent 'on many factors, such as the location ofsthe various processing stations around the drum surface, thelength and velocity of the image storage member relative to .sthezsiz e of the drum surface, and-the like. Eorconvenienceof illustration, however, the circumference of the transfer .roll -isherein deemed to be one'half that of the ,photoconductive drum.
- the support sheet is moved onthe roll surface to a region of low voltage contrast wherein there-is positioned a corona generator 55 similar to that described in the previously noted Vyverberg patent.
- region of low .voltage contrast is a regionwherein the gripping-device is providedwithin the roll to properly align and secure individual sheetsof material to theroll surface.
- two sheet aligning and gripping assemblies 60 (516.3.) are supported'in spaced parallel alignment within the roll-to act ,upon the two leading edge corners of a support sheet that is broughtinto operative communication therewith.
- Each assembly is made up of two components, alever arm component bias roll surface does not electrically communicate with another voltage source.
- -voltage sourcej as herein used is broad enough to' include a .groundedjbody or the like.
- corona generator is dapted o' apply corona to the top and a lifting component 64 .tha't are supported upon a common base plate 65 by means of a mounting bracket 66.
- the base plate is rigidly affixed to the interior walls of the roll and is arranged to move in unison with the roll member.
- Mounting bracket 66 also serves to rotatably support a control shaft 67 which runs longitudinally across the interior of the roll and eittends through the end cap 36 (FIG. 2).
- Each of the lever, arm components are rotatably secured to bracket 66 by means of a pin 68 and the arms arranged to rotate freely in openings '69 I provided in the roll surface.
- Lifting elements '64 are secured to the control shaft 67 and move in accordance therewith.
- a 'cam face 70 is machined on the lifting ele .ment and is forced to ride in contact with the bottom surface of the lever arm by means of a spring 71 so that the lifting arm is raised and lowered in response to the movement of the control, shaft.
- the portion of the control shaft that extends beyond end cap 36 is provided with a cam followed 78 arranged to ride in contact with 1 impart a predetermined motion- Ea profile surface 79 to to thelever arm.
- the bias potential on the roll can be removed prior to the corona induced transferstep.
- the sheet is once again moved on the roll surface into the sheet receiving station 83.
- the lever arm 63 of the gripping mechanism is moved to a fully extended position, as shown in FIG. 3, causing the .sheet to be elevated 'well above the roll surface.
- the elevated sheet is carried over a stripping bar 89 which guides the sheet into a fuser assembly 90.v
- the sheet is advanced through the fuserassembly by means of a transport 91 and the images are permanently fixed to both sides of the support 'sheet.
- the now duplexed copies are taken from the fuser and stored in a collecting tray 83.
- the rotating photoconductive surface as it moves out of transfer station is brought into operative communication with a fibrous brush member 50 that is moving at'a speed sufficient to dislodge any residual toner remaining on the drum surface after the transfer operation.
- the residual toner is collected and removed from "the machine environment by means of conventional apparatus'known and used in the art.
- v t 1.
- a transfer member forv electrically cooperating with a conductive support surface to electrically attract charge particles from the support surface towards the member including, I I I va conductive substrate for supporting a uniform bias I potential thereon,
- an intermediate resilient blanket placed in contact with said substrate having an electrical resistivity such that the blanket is capable of transmitting said bias potential on said substrate to the outer periphery of said blanket, and I an outer coating placed over saidblanket having an electrical resistivity to minimize ionization of the surrounding atmosphere when said transfer member is placed in electrical cooperation with said support surface.
- a transfer roll for electrically cooperating with a photoconductive plate when brought into contact therewith to attract charged toner particles from the plate toward the roll including a rigid cylindrical core or electrically conductive material
- a resilient intermediate blanket placed over said I core, in contact therewith, having an electrical re- I sistivity such that the blanket is capable of trans- Imittingsaid bias potential from said conductive core to the outer periphery of said blanket,
- the transfer roll of claim 7 further including dielectric end caps for rotatably supporting and electrically isolating said transfer roll.
- the apparatus-of claim 8 further including sheet gripping means to secure a sheet of final support material to the outer surface of said transfer roll.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electrostatic Charge, Transfer And Separation In Electrography (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10096970A | 1970-12-23 | 1970-12-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3702482A true US3702482A (en) | 1972-11-07 |
Family
ID=22282455
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US100969A Expired - Lifetime US3702482A (en) | 1970-12-23 | 1970-12-23 | Bias roll transfer |
Country Status (9)
Country | Link |
---|---|
US (1) | US3702482A (xx) |
BE (1) | BE777017A (xx) |
BR (1) | BR7107506D0 (xx) |
CA (1) | CA962890A (xx) |
DE (1) | DE2163531C3 (xx) |
FR (1) | FR2119657A5 (xx) |
GB (1) | GB1368500A (xx) |
IT (1) | IT944209B (xx) |
NL (1) | NL162757C (xx) |
Cited By (60)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3879121A (en) * | 1973-12-13 | 1975-04-22 | Ibm | Transfer system |
JPS50150437A (xx) * | 1974-04-26 | 1975-12-02 | ||
JPS50150438A (xx) * | 1974-04-26 | 1975-12-02 | ||
JPS5159636A (en) * | 1974-09-09 | 1976-05-24 | Xerox Corp | Tonaazono teshinshahohooyobi tenshabuzai |
US4038665A (en) * | 1975-09-26 | 1977-07-26 | Xerox Corporation | Recording with donor transfer of magnetic toner |
US4058879A (en) * | 1976-07-01 | 1977-11-22 | Xerox Corporation | Compositions and method for enhancing electrical life of polymers used in xerographic devices |
US4174905A (en) * | 1977-02-14 | 1979-11-20 | Eastman Kodak Company | Method and apparatus for producing duplex copies |
US4291970A (en) * | 1979-11-29 | 1981-09-29 | Eastman Kodak Company | Apparatus for producing duplex copies |
US4297716A (en) * | 1976-07-30 | 1981-10-27 | Canon Kabushiki Kaisha | Recording apparatus including a continuous transfer web |
US4322734A (en) * | 1977-02-02 | 1982-03-30 | Ricoh Company, Ltd. | Variable speed electrostatographic apparatus |
US4326792A (en) * | 1979-12-28 | 1982-04-27 | Savin Corporation | Combined registration image transfer and pickoff assembly for electrophotographic copier |
US4522866A (en) * | 1981-04-23 | 1985-06-11 | Olympus Optical Co., Ltd. | Elastomer member with non-tacky surface treating layer and method of manufacturing same |
WO1985004963A1 (en) * | 1984-04-18 | 1985-11-07 | Eastman Kodak Company | Roller transfer apparatus |
US4557583A (en) * | 1981-12-16 | 1985-12-10 | Coulter Stork Patents B.V. | Apparatus for transferring a toner image from a photoconductive coating to a print sheet |
US4712906A (en) * | 1987-01-27 | 1987-12-15 | Eastman Kodak Company | Electrostatographic apparatus having a transfer drum |
US4724458A (en) * | 1986-12-09 | 1988-02-09 | Eastman Kodak Company | Articulating roller transfer apparatus |
US4875069A (en) * | 1987-01-19 | 1989-10-17 | Canon Kabushiki Kaisha | Anti-fouling device for sheet gripper |
US4937635A (en) * | 1989-10-23 | 1990-06-26 | Eastman Kodak Company | Multiple image registration |
US4984025A (en) * | 1989-02-06 | 1991-01-08 | Spectrum Sciences B.V. | Imaging system with intermediate transfer member |
US5011739A (en) * | 1989-10-02 | 1991-04-30 | Eastman Kodak Company | Moisture stable biasable transfer members and method for making same |
US5016056A (en) * | 1990-05-07 | 1991-05-14 | Eastman Kodak Company | Multicolor image forming apparatus and transfer roller |
US5038178A (en) * | 1987-10-20 | 1991-08-06 | Kabushiki Kaisha Toshiba | Image transfer member including an electroconductive layer |
US5040029A (en) * | 1989-11-01 | 1991-08-13 | Eastman Kodak Company | Multicolor image transfer method and apparatus |
US5084737A (en) * | 1990-09-24 | 1992-01-28 | Eastman Kodak Company | Image transfer method and apparatus wherein the application of the transfer bias is delayed as a function of humidity |
WO1992008170A1 (en) * | 1990-10-25 | 1992-05-14 | Eastman Kodak Company | Intermediate transfer method and roller |
US5132737A (en) * | 1988-12-09 | 1992-07-21 | Canon Kabushiki Kaisha | Image forming apparatus with adsorption means |
US5150165A (en) * | 1990-04-10 | 1992-09-22 | Canon Kabushiki Kaisha | Image forming apparatus having image transfer member |
US5156915A (en) * | 1991-11-26 | 1992-10-20 | Eastman Kodak Company | Moisture stable polyurethane biasable members |
US5168313A (en) * | 1988-04-28 | 1992-12-01 | Kabushiki Kaisha Toshiba | Toner image transfer method and device for electrophotographic printing apparatus |
US5212032A (en) * | 1991-11-26 | 1993-05-18 | Eastman Kodak Company | Moisture stable polyurethane biasable transfer members |
US5217838A (en) * | 1991-11-26 | 1993-06-08 | Eastman Kodak Company | Moisture stable biasable transfer members |
US5250357A (en) * | 1991-11-26 | 1993-10-05 | Eastman Kodak Company | Moisture stable elastomeric polyurethane biasable transfer members |
US5378525A (en) * | 1992-07-23 | 1995-01-03 | Tokai Rubber Industries, Ltd. | Crowned resilient roll with coating layer and method of producing the same |
US5390012A (en) * | 1991-12-25 | 1995-02-14 | Canon Kabushiki Kaisha | Image forming apparatus having transfer material carrying member |
EP0666518A2 (en) * | 1994-02-04 | 1995-08-09 | Sharp Kabushiki Kaisha | Image forming apparatus |
EP0690360A2 (en) | 1994-06-30 | 1996-01-03 | Eastman Kodak Company | Polyurethane biasable transfer members |
EP0690359A2 (en) | 1994-06-30 | 1996-01-03 | Eastman Kodak Company | Polyurethane biasable transfer members having improved moisture stability |
EP0695975A1 (en) | 1994-08-01 | 1996-02-07 | Xerox Corporation | Self biasing charging member |
US5497222A (en) * | 1989-02-06 | 1996-03-05 | Indigo N.V. | Image transfer apparatus incorporating an integral heater |
US5506745A (en) * | 1994-08-05 | 1996-04-09 | Xerox Corporation | Hollow conformable charge roll |
US5536352A (en) * | 1994-11-14 | 1996-07-16 | Eastman Kodak Company | Methods of making centrifugally cast parts |
US5643706A (en) * | 1995-11-30 | 1997-07-01 | Xerox Corporation | Process for preparing electroconductive members |
US5677022A (en) * | 1994-11-14 | 1997-10-14 | Eastman Kodak Company | Electrostatographic roller mask |
US5702852A (en) * | 1995-08-31 | 1997-12-30 | Eastman Kodak Company | Multi-color method of toner transfer using non-marking toner and high pigment marking toner |
US5729810A (en) * | 1993-01-22 | 1998-03-17 | Xerox Corporation | Overcoated transfer roller for transferring developed images from one surface to another |
US5745829A (en) * | 1989-01-04 | 1998-04-28 | Indigo N.V. | Imaging apparatus and intermediate transfer blanket therefor |
US5794111A (en) * | 1995-12-14 | 1998-08-11 | Eastman Kodak Company | Apparatus and method of transfering toner using non-marking toner and marking toner |
US5849399A (en) * | 1996-04-19 | 1998-12-15 | Xerox Corporation | Bias transfer members with fluorinated carbon filled fluoroelastomer outer layer |
US6074756A (en) * | 1997-04-25 | 2000-06-13 | Eastman Kodak Company | Transfer member for electrostatography |
US6074704A (en) * | 1994-08-17 | 2000-06-13 | 3M Innovative Properties Company | Apparatus and method for applying coating materials to individual sheet members |
US6500260B2 (en) | 1993-02-19 | 2002-12-31 | Minnesota Mining & Mfg | Apparatus for applying a coating material to sheets |
US6548154B1 (en) | 2000-11-28 | 2003-04-15 | Xerox Corporation | Electrical charge relaxable wear resistant coating for bias charging or transfer member |
US6584296B1 (en) | 2001-11-30 | 2003-06-24 | Xerox Corporation | Electro-mechanical roll with core and segments |
US20030133828A1 (en) * | 2001-12-31 | 2003-07-17 | Lockheed Martin Corporation | Method for reducing airborne biological agents while processing mail |
US20050286934A1 (en) * | 2004-06-25 | 2005-12-29 | Xerox Corporation | Biased charge roller with embedded electrodes with post-nip breakdown to enable improved charge uniformity |
US7067027B2 (en) | 2001-11-30 | 2006-06-27 | Xerox Corporation | Method of making an electro-mechanical roll |
US20090274479A1 (en) * | 2008-04-30 | 2009-11-05 | Xerox Corporation | Web fed charging roll cleaner |
US20090274480A1 (en) * | 2008-04-30 | 2009-11-05 | Xerox Corporation | Web fed charging roll cleaner |
US20100266318A1 (en) * | 2009-04-17 | 2010-10-21 | Seiko Epson Corporation | Image forming method and image forming apparatus |
US20170356404A1 (en) * | 2016-06-14 | 2017-12-14 | Dayco Ip Holdings, Llc | Bypass valve in an apparatus for producing vacuum |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4431303A (en) * | 1981-11-04 | 1984-02-14 | Xerox Corporation | Sheet handling apparatus for use with a very high speed duplicator |
EP0104203B1 (en) * | 1982-03-01 | 1986-12-17 | EASTMAN KODAK COMPANY (a New Jersey corporation) | Image transfer apparatus with sheet handling device for elctrographic copier |
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US3281857A (en) * | 1962-01-12 | 1966-10-25 | Xerox Corp | Xerographic transfer platen |
US3285168A (en) * | 1963-05-07 | 1966-11-15 | Crocker Citizens Nat Bank | Powder image transfer system |
US3316555A (en) * | 1963-04-29 | 1967-04-25 | Burroughs Corp | Electrostatic page printer |
US3441938A (en) * | 1964-06-01 | 1969-04-29 | Burroughs Corp | Electrostatic and magnetic recording method |
US3534383A (en) * | 1964-12-14 | 1970-10-13 | Fujitsu Ltd | Method of electrostatic recording and electrostatic recording apparatus |
-
1970
- 1970-12-23 US US100969A patent/US3702482A/en not_active Expired - Lifetime
-
1971
- 1971-09-14 CA CA122,792A patent/CA962890A/en not_active Expired
- 1971-11-10 BR BR7506/71A patent/BR7107506D0/pt unknown
- 1971-12-17 FR FR7146257A patent/FR2119657A5/fr not_active Expired
- 1971-12-20 GB GB5911971A patent/GB1368500A/en not_active Expired
- 1971-12-21 IT IT32719/71A patent/IT944209B/it active
- 1971-12-21 NL NL7117550.A patent/NL162757C/xx active
- 1971-12-21 BE BE777017A patent/BE777017A/xx unknown
- 1971-12-21 DE DE2163531A patent/DE2163531C3/de not_active Expired
Patent Citations (5)
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---|---|---|---|---|
US3281857A (en) * | 1962-01-12 | 1966-10-25 | Xerox Corp | Xerographic transfer platen |
US3316555A (en) * | 1963-04-29 | 1967-04-25 | Burroughs Corp | Electrostatic page printer |
US3285168A (en) * | 1963-05-07 | 1966-11-15 | Crocker Citizens Nat Bank | Powder image transfer system |
US3441938A (en) * | 1964-06-01 | 1969-04-29 | Burroughs Corp | Electrostatic and magnetic recording method |
US3534383A (en) * | 1964-12-14 | 1970-10-13 | Fujitsu Ltd | Method of electrostatic recording and electrostatic recording apparatus |
Cited By (73)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3879121A (en) * | 1973-12-13 | 1975-04-22 | Ibm | Transfer system |
JPS50150437A (xx) * | 1974-04-26 | 1975-12-02 | ||
JPS50150438A (xx) * | 1974-04-26 | 1975-12-02 | ||
US3959574A (en) * | 1974-04-26 | 1976-05-25 | Xerox Corporation | Biasable member and method for making |
US3959573A (en) * | 1974-04-26 | 1976-05-25 | Xerox Corporation | Biasable member and method for making |
JPS5159636A (en) * | 1974-09-09 | 1976-05-24 | Xerox Corp | Tonaazono teshinshahohooyobi tenshabuzai |
US4038665A (en) * | 1975-09-26 | 1977-07-26 | Xerox Corporation | Recording with donor transfer of magnetic toner |
US4058879A (en) * | 1976-07-01 | 1977-11-22 | Xerox Corporation | Compositions and method for enhancing electrical life of polymers used in xerographic devices |
US4297716A (en) * | 1976-07-30 | 1981-10-27 | Canon Kabushiki Kaisha | Recording apparatus including a continuous transfer web |
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Also Published As
Publication number | Publication date |
---|---|
DE2163531C3 (de) | 1979-11-22 |
NL162757C (nl) | 1980-06-16 |
GB1368500A (en) | 1974-09-25 |
CA962890A (en) | 1975-02-18 |
NL7117550A (xx) | 1972-06-27 |
BR7107506D0 (pt) | 1973-06-07 |
DE2163531B2 (de) | 1979-03-29 |
NL162757B (nl) | 1980-01-15 |
IT944209B (it) | 1973-04-20 |
DE2163531A1 (de) | 1972-07-13 |
BE777017A (fr) | 1972-06-21 |
FR2119657A5 (xx) | 1972-08-04 |
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