US3847119A - Transfer roller assembly - Google Patents

Transfer roller assembly Download PDF

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Publication number
US3847119A
US3847119A US00238045A US23804572A US3847119A US 3847119 A US3847119 A US 3847119A US 00238045 A US00238045 A US 00238045A US 23804572 A US23804572 A US 23804572A US 3847119 A US3847119 A US 3847119A
Authority
US
United States
Prior art keywords
roller
transfer roller
assembly
transfer
brush
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
Application number
US00238045A
Other languages
English (en)
Inventor
D Hoffman
G Koch
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
Original Assignee
Xerox Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Xerox Corp filed Critical Xerox Corp
Priority to US00238045A priority Critical patent/US3847119A/en
Priority to CA157,422A priority patent/CA977206A/en
Priority to AR245996A priority patent/AR196224A1/es
Priority to DE2301068A priority patent/DE2301068A1/de
Priority to AT41673*#A priority patent/AT327002B/de
Priority to JP48010611A priority patent/JPS6034111B2/ja
Priority to FR7305277A priority patent/FR2177746B1/fr
Priority to BR731314A priority patent/BR7301314D0/pt
Priority to NL7303662A priority patent/NL7303662A/xx
Priority to BE128959A priority patent/BE796983A/fr
Priority to IL41830A priority patent/IL41830A/en
Priority to SE7304021A priority patent/SE378041B/xx
Priority to AU53694/73A priority patent/AU464751B2/en
Priority to CH429273A priority patent/CH558033A/xx
Priority to IT22146/73A priority patent/IT983617B/it
Priority to ES413018A priority patent/ES413018A1/es
Priority to ZA732068A priority patent/ZA732068B/xx
Priority to DD169716A priority patent/DD103979A5/xx
Priority to GB1470473A priority patent/GB1413711A/en
Application granted granted Critical
Publication of US3847119A publication Critical patent/US3847119A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • G03G15/14—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
    • G03G15/168—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 with means for conditioning the transfer element, e.g. cleaning

Definitions

  • ABSTRACT A transfer roller assembly including a transfer roller and arotary cleaning brush for an electrostatographic machine.
  • the transfer roller assembly is rotated abouta support shaft and in pressure contact with the photoconductive surface during the image transfer mode therefor.
  • the transfer roller assembly includes a rotating cleaning brush in cleaning contact with the transfer roller and is movable with the roller about the support shaft. Separate drive mechanisms from a single drive member on the assembly provide independent rotation to the roller and the brush.
  • an electrostatographic plate having a surface comprising a layer of photoconductive insulating material affixed to a conductive backing is used to support electrostatic images.
  • the plate is electrostatically charged uniformly over its surface and then exposed to a light pattern of the image being reproduced to thereby discharge the charge in the areas where light strikes the layer.
  • the undischarged areas of the layer thus form an electrostatic charge pattern in conformity with the configuration of the original light pattern.
  • the latent electrostatic image may then be developed by contacting it with a finely divided electrostatically attractable material, such as a resinous powder.
  • a finely divided electrostatically attractable material such as a resinous powder.
  • the powder is held in the image areas by the electrostatic fields on the layer. Where the field is greatest, the
  • a powder image is produced in conformity with the light image of the copy being reproduced.
  • the powder is subsequently transferred to a sheet of paper or other surface and suitably affixed to thereby form a permanent print.
  • the toner may be fixed by passing the sheet of paper or other surface including the transferred image between a heated roller and a second roller in pressure contact therewith whereby the toner becomes fused to the sheet of paper.
  • the image is generally transferred to an image receiving member by passing sucha member between the photoconductive surface including the developed image and a roller in contact therewith.
  • an image receiving member By passing sucha member between the photoconductive surface including the developed image and a roller in contact therewith.
  • An object of this invention is to provide a novel, unitized transfer assembly.
  • Another object of this invention is to provide a novel transfer assembly including a cleaning roller which may 7 be readily placed in operational contact with a transfer roller to be driven therewith and movable as a unit with the roller and drive means therefor.
  • a transfer assembly rotatably supported within thehousing of an electrostatographic machine in juxtaposition to a photoconductive surface therefor.
  • the transfer assembly is provided with a transfer roller, a rotary cleaning brush in brushing engagement with the surface of the roller.
  • FIG. 1 is a schematic sectional view of an electrostatic reproduction machine embodying the principles of the invention
  • FIG. 2 is a view of one end of the transfer assembly showing the motion imparting means for the transfer roller;
  • FIG. 3 is an isometric view (greatly simplified) of the transfer roller assembly
  • FIG. 4 is a view of the other end of the assembly showing the motion imparting means for the rotary brush
  • FIG. 5 is a rear view of the locking shaft assembly
  • FIG. 6 is a side elevation view of a mounting frame for the transfer roller assembly.
  • FIG. 7 is a side view of the transfer roller assembly illustrating the movement thereof when disposed in juxtaposition to a photoconductive belt of an electrostatographic machine.
  • FIG. 1 For a general understanding of the illustrated copier/reproduction machine in which the invention may be incorporated, reference is had to FIG. 1 in which the various system components for the machines are schematically illustrated.
  • a document D to be copied is placed upon a transparent support platen P fixedly arranged in an illumination assembly, generally indicated by the reference numeral 10, positioned at the left end of the machine.
  • Light rays from an illumination system are flashed upon the document to produce image rays corresponding to the informational areas.
  • the image rays are projected by means of an optical system onto the photosensitive surface of a xerographic plate in the form of a flexible photoconductive belt 12 arranged on a belt assembly, generally indicated by the reference numeral 14.
  • the belt 12 comprises a photoconductive layer of se lenium which is the light receiving surface and imaging medium for the apparatus, on a conductive backing.
  • the surface of the photoconductive belt is made photosensitive by a previous step of uniformly charging the same by means of a corona generating device or corotron 13.
  • the belt is journaled for continuous movement upon three rollers 20, 21 and 22 positioned with their axes in parallel.
  • the photoconductive belt assembly 14 is 'slidably mounted upon two support shafts 23 and 24 with the roller 22 rotatably supported on the shaft 23 which is-secured to the frame of the apparatus and is rotatably driven by a suitable motor and drive assembly (not shown) in the direction of the arrow at a constant rate.
  • a suitable motor and drive assembly (not shown) in the direction of the arrow at a constant rate.
  • the portion exposed is that portion of the belt running between rollers 20 and 21.
  • the reflected light image of such original document positioned on the platen is flashed on the surface of the belt to produce an electrostatic latent image thereon at exposure station A.
  • the electrostatic image passes through a developing station B in which there is positioned a developerassembly generally indicated by the reference numeral 15, and which provides development of the electrostatic image by means of multiple brushes 16 as the same moves through the development zone.
  • the developed electrostatic image is transported by the belt to a transfer station C wherein the presentinvention may be positioned and whereat a sheet of copy paper is moved between a transfer roller and the belt at a speed in synchronism with the moving belt in order to accomplish transfer of the developed image solely by an electrical bias on the transfer roller.
  • a sheet transport mechanism generally indicated at 17 adapted to transport sheets of paper from a paper handling mechanism generally indicated by the reference numeral 18 to the developed image on the belt at the station C.
  • the sheet After the sheet is stripped from the belt 12, it is con- Y veyed into a fuser assembly, generally indicated by the reference numeral 19, wherein the developed and transferred xerographic powder image on the sheet material is permanently affixed thereto. After fusing, the
  • finished copy is discharged from the apparatus at a suitable point for collection externally of the apparatus.
  • FIGS. 2, 3 and 4 there is illustrated retaining asemblies 76 in which is positioned one end pressure contact with the photoconductive surface 12,
  • Such rotation a transfer assembly generally indicated as 30, having a I transfer roller 32 secured to a shaft 34 which is mounted for rotation in suitable bearings supported in hub assemblies 36, 37.
  • a pulley 38 is affixed to one end of the shaft 34 extending through the hub assembly 36 and engages an endless timing belt 40 entrained around an idler pulley 41 and a drive pulley 42.
  • the pulley 42 is secured to one end of a drive shaft 44 which also supports the transfer assembly.
  • the drive shaft 44 is mounted for rotation in the hub assemblies 36, 37 above' the transfer roller 32 in parallel with the shaft 34 and extends outwardly beyond the hub assemblies 36,
  • the other end of the drive shaft 44 beyond the hub assembly 37 is suitably connected to the main drive system for the machine.
  • Bearings 48 are positioned on the ends of the shaft 44 and are positioned. in frame support assemblies, generally indicated as 50 and 52 (see FIGS. 5 and 6).
  • Each of the frame support assemblies 50 and 52 is comprised of a frame section-54 having a cylindrically shaped machined surface56 for receiving the bearings 48 of the support shaft 44.
  • An upwardly extending tab section 58 is formed on the frame section to receive a clamp 60 pivotally mounted to the tab section 58, such as by a pin 62.
  • the clamp 60 is held in locking relationship to the frame section 54 by ascrew 64.
  • the frame section 54 is provided with a shaft receiving opening 66 and mounting holes 68 for affixing the frame assembly 52 to the main body (not shown) of the electrostato graphic machine.
  • the frame section 50 is similarly formed with respect to frame section v of the locking shaft causes the lever elements to rotate clockwise about the shaft 72 forcing the pin section 82 thereof to press against one side of the cooperating grooves 84 on the hub assemblies thereby causing slight rocking movement or rotation of the entire transfer assembly about the shaft 44. This, in turn, forces under spring tension the transfer roller assembly 30 against the photoconductive surface 12.
  • This relationship of pressure contact of the transfer roller 32 with the photoconductive member 12 facilitates image transfer and permits the transfer roller 32 and photoconductive member 12 to function as part of the transport system for image receiving members.
  • a cleaning brush having stub shafts 102, one at each end thereof, extending into the hub assemblies 36, 37.
  • the hub assembly 37 includes the drive train for effecting rotation of the brush 100'in accordance with the transfer roller 32.
  • a semi-cylindricalcovering or housing 104 for containing the brush is suitably mounted in the hub assemblies 36, 37. The bristles of the brush are in interferring engagement with the surface of the roller 32 and upon relative rotation between the roller and the rotary brush, a sweeping action is accomplished.
  • the housing 104 is connected by way of a vacuum duct 106 to a vacuum source in the machine
  • the drive train for producing rotation of the rotary brush 100 includes a drive gear 108 mounted on the drive shaft 44 to be driven thereby.
  • the gear 108 is in mesh with an idler gear 110 which, in turn, is in mesh with a gear 112 secured to the adjacent stub shaft 102 for the rotary brush 100.
  • the transfer roller 32 and the brush 100 rotate in the same direction during brushing operation giving maximum difference in relative surface velocity.
  • the relationship of the diameters of the gears 108, 110 and 112 is such as to provide an approximate ratio of :1 to the rotary speed relationship of the cleaning brush to the transfer roller, which ratio has been found to be optimum in cleaning efficiency.
  • This provides an impact velocity for the brush bristles relative to the toner particles which is of sufficient force to dislodge the particles dependently of the rotation imparted to the rotary cleaning brush.
  • Other modifications of the present invention will occur to those skilled in the art upon a reading of the present disclosure which modifications are intended to be included within the scope of this invention.
  • a transfer assembly having a transfer roller mounted proximate to said photoconductive member, a rotary cleaning brush mounted adjacent said roller and having bristles in interferring engagement with the surface of said roller, said roller and said brush being mounted to rotate in the same direction, and means for pivotally supporting said assembly so that said roller can be moved into and out of contact with said photoconductive member, said pivotally supporting means permitting said roller and said brush to be moved as a unit.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electrostatic Charge, Transfer And Separation In Electrography (AREA)
  • Cleaning In Electrography (AREA)
US00238045A 1972-03-27 1972-03-27 Transfer roller assembly Expired - Lifetime US3847119A (en)

Priority Applications (19)

Application Number Priority Date Filing Date Title
US00238045A US3847119A (en) 1972-03-27 1972-03-27 Transfer roller assembly
CA157,422A CA977206A (en) 1972-03-27 1972-11-24 Cleaning brush assembly
AR245996A AR196224A1 (es) 1972-03-27 1973-01-05 Un conjunto de transferencia de imagen
DE2301068A DE2301068A1 (de) 1972-03-27 1973-01-10 Elektrostatografische kopiermaschine
AT41673*#A AT327002B (de) 1972-03-27 1973-01-18 Bildubertragungseinrichtung fur eine elektrostatographische kopiermaschine
JP48010611A JPS6034111B2 (ja) 1972-03-27 1973-01-25 静電写真装置の転写装置
FR7305277A FR2177746B1 (fr) 1972-03-27 1973-02-15
BR731314A BR7301314D0 (pt) 1972-03-27 1973-02-22 Maquina eletrostatografica com uma peca fotocondutora da maquina
NL7303662A NL7303662A (fr) 1972-03-27 1973-03-15
IL41830A IL41830A (en) 1972-03-27 1973-03-19 Transmission roller system for electrostatographic device
BE128959A BE796983A (fr) 1972-03-27 1973-03-19 Perfectionnement aux machines de reproduction electrostatographiques
SE7304021A SE378041B (fr) 1972-03-27 1973-03-22
AU53694/73A AU464751B2 (en) 1972-03-27 1973-03-22 Transfer member assembly
CH429273A CH558033A (de) 1972-03-27 1973-03-23 Elektrostatografische kopiermaschine.
ES413018A ES413018A1 (es) 1972-03-27 1973-03-26 Una maquina electrostatografica.
IT22146/73A IT983617B (it) 1972-03-27 1973-03-26 Macchina elettrostatografica con gruppo a rullo di trasferimento pereezionato
ZA732068A ZA732068B (en) 1972-03-27 1973-03-26 Transfer roller assembly
DD169716A DD103979A5 (fr) 1972-03-27 1973-03-26
GB1470473A GB1413711A (en) 1972-03-27 1973-03-27 Transfer member assembly

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00238045A US3847119A (en) 1972-03-27 1972-03-27 Transfer roller assembly

Publications (1)

Publication Number Publication Date
US3847119A true US3847119A (en) 1974-11-12

Family

ID=22896274

Family Applications (1)

Application Number Title Priority Date Filing Date
US00238045A Expired - Lifetime US3847119A (en) 1972-03-27 1972-03-27 Transfer roller assembly

Country Status (18)

Country Link
US (1) US3847119A (fr)
JP (1) JPS6034111B2 (fr)
AR (1) AR196224A1 (fr)
AT (1) AT327002B (fr)
BE (1) BE796983A (fr)
BR (1) BR7301314D0 (fr)
CA (1) CA977206A (fr)
CH (1) CH558033A (fr)
DD (1) DD103979A5 (fr)
DE (1) DE2301068A1 (fr)
ES (1) ES413018A1 (fr)
FR (1) FR2177746B1 (fr)
GB (1) GB1413711A (fr)
IL (1) IL41830A (fr)
IT (1) IT983617B (fr)
NL (1) NL7303662A (fr)
SE (1) SE378041B (fr)
ZA (1) ZA732068B (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4382673A (en) * 1980-03-25 1983-05-10 Tokyo Shibaura Denki Kabushiki Kaisha Transfer device
US4998143A (en) * 1988-09-20 1991-03-05 Hitachi, Ltd. Electrophotographic image transfer member, electrophotographic image transfer device and electrophotographic recording apparatus
US5070370A (en) * 1990-12-24 1991-12-03 Eastman Kodak Company Image-forming apparatus having a replaceable cartridge and a transfer member cleaning device
US5101238A (en) * 1991-01-18 1992-03-31 Eastman Kodak Company Roller transfer assembly
US5303014A (en) * 1992-11-20 1994-04-12 Xerox Corporation Biasable member having low surface energy
US6381427B1 (en) * 2001-03-14 2002-04-30 Heidelberg Digital L.L.C. Transfer roller cleaning
US20050214021A1 (en) * 2004-03-26 2005-09-29 Eastman Kodak Company Method and apparatus for discharging a conductive brush cleaning assembly for a transfer roller
US20080179786A1 (en) * 2007-01-17 2008-07-31 Sperry Charles R Cartridge for solid imaging apparatus and method

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5027435A (fr) * 1973-07-09 1975-03-20
JPS5128725A (fr) * 1974-09-04 1976-03-11 Nippon Telegraph & Telephone
JPS51101415A (en) * 1975-03-05 1976-09-07 Mitsubishi Electric Corp Gazogoseisochi
JPS57188058A (en) * 1981-08-14 1982-11-18 Konishiroku Photo Ind Co Ltd Copy paper feeding device of copying machine
US5315358A (en) * 1993-04-19 1994-05-24 Xerox Corporation Flicker bar with an integral air channel

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2859673A (en) * 1954-03-29 1958-11-11 Ibm Electrophotographic printer
US3105777A (en) * 1960-04-04 1963-10-01 Xerox Corp Xerographic developing apparatus
US3592642A (en) * 1966-11-21 1971-07-13 Xerox Corp Duplicating method wherein a paper sheet heated to the melting point of a toner image simultaneously causes the transfer of the toner from the photoconductor and fusing of the toner image on the paper sheet
US3642364A (en) * 1969-11-14 1972-02-15 Xerox Corp Transfer apparatus
US3691993A (en) * 1970-11-23 1972-09-19 Ibm Apparatus for transferring developed image
US3724422A (en) * 1970-12-14 1973-04-03 Xerox Corp Magnetic brush developing apparatus

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4634779Y1 (fr) * 1968-02-02 1971-12-01

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2859673A (en) * 1954-03-29 1958-11-11 Ibm Electrophotographic printer
US3105777A (en) * 1960-04-04 1963-10-01 Xerox Corp Xerographic developing apparatus
US3592642A (en) * 1966-11-21 1971-07-13 Xerox Corp Duplicating method wherein a paper sheet heated to the melting point of a toner image simultaneously causes the transfer of the toner from the photoconductor and fusing of the toner image on the paper sheet
US3642364A (en) * 1969-11-14 1972-02-15 Xerox Corp Transfer apparatus
US3691993A (en) * 1970-11-23 1972-09-19 Ibm Apparatus for transferring developed image
US3724422A (en) * 1970-12-14 1973-04-03 Xerox Corp Magnetic brush developing apparatus

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
D. J. Oldenboom, Electromechanical Transfer Mechanism , IBM Tech. Disclosure, Vol. 1, No. 3, Oct 1958. *

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4382673A (en) * 1980-03-25 1983-05-10 Tokyo Shibaura Denki Kabushiki Kaisha Transfer device
US4998143A (en) * 1988-09-20 1991-03-05 Hitachi, Ltd. Electrophotographic image transfer member, electrophotographic image transfer device and electrophotographic recording apparatus
US5070370A (en) * 1990-12-24 1991-12-03 Eastman Kodak Company Image-forming apparatus having a replaceable cartridge and a transfer member cleaning device
US5101238A (en) * 1991-01-18 1992-03-31 Eastman Kodak Company Roller transfer assembly
US5303014A (en) * 1992-11-20 1994-04-12 Xerox Corporation Biasable member having low surface energy
US6381427B1 (en) * 2001-03-14 2002-04-30 Heidelberg Digital L.L.C. Transfer roller cleaning
US20050214021A1 (en) * 2004-03-26 2005-09-29 Eastman Kodak Company Method and apparatus for discharging a conductive brush cleaning assembly for a transfer roller
US7245848B2 (en) * 2004-03-26 2007-07-17 Eastman Kodak Company Method and apparatus for discharging a conductive brush cleaning assembly for a transfer roller
US20080179786A1 (en) * 2007-01-17 2008-07-31 Sperry Charles R Cartridge for solid imaging apparatus and method
US8105066B2 (en) * 2007-01-17 2012-01-31 3D Systems, Inc. Cartridge for solid imaging apparatus and method

Also Published As

Publication number Publication date
BR7301314D0 (pt) 1974-07-25
JPS6034111B2 (ja) 1985-08-07
ES413018A1 (es) 1976-01-01
FR2177746A1 (fr) 1973-11-09
CA977206A (en) 1975-11-04
IL41830A0 (en) 1973-05-31
ZA732068B (en) 1973-12-19
AT327002B (de) 1976-01-12
FR2177746B1 (fr) 1977-04-29
AR196224A1 (es) 1973-12-10
CH558033A (de) 1975-01-15
DD103979A5 (fr) 1974-02-12
IL41830A (en) 1976-02-29
IT983617B (it) 1974-11-11
DE2301068A1 (de) 1973-10-11
BE796983A (fr) 1973-09-19
JPS499244A (fr) 1974-01-26
SE378041B (fr) 1975-08-11
NL7303662A (fr) 1973-10-01
AU5369473A (en) 1974-09-26
GB1413711A (en) 1975-11-12
ATA41673A (de) 1975-03-15

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