US3883293A - Pressure roll construction - Google Patents

Pressure roll construction Download PDF

Info

Publication number
US3883293A
US3883293A US458159A US45815974A US3883293A US 3883293 A US3883293 A US 3883293A US 458159 A US458159 A US 458159A US 45815974 A US45815974 A US 45815974A US 3883293 A US3883293 A US 3883293A
Authority
US
United States
Prior art keywords
pressure
roll
pressure roll
fusing
heated
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
US458159A
Other languages
English (en)
Inventor
Alan F Mccarroll
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 US458159A priority Critical patent/US3883293A/en
Priority to CA222,186A priority patent/CA1065388A/fr
Priority to GB1362775A priority patent/GB1474325A/en
Application granted granted Critical
Publication of US3883293A publication Critical patent/US3883293A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • G03G15/20—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat
    • G03G15/2003—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat
    • G03G15/2014—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat using contact heat
    • G03G15/206—Structural details or chemical composition of the pressure elements and layers thereof

Definitions

  • ABSTRACT An improved pressure roll construction for a pressure heated fusing apparatus in where the pressure roll is formed with reinforcing elements at the ends thereof.
  • SHEET 30F 3 [a PRIOR 551 FIG. .3 f 34 WT NWT PRESSURE I I I I I I I I I I I I I I I I I I I I I I I l I I I I I I I I I l I I I l l I I I I I I I I II PRESSURE PRESSURE ROLL CONSTRUCTION
  • This application relates to heated pressure fusing systems and in particular to an improved pressure roll construction which resists bulging at the roll ends thereby minimizing any deviation from uniform loading along the roll.
  • a xerr graphic surface comprising a layer of photoconductive insulating material affixed to a conductive backing is used to support electrostatic images.
  • the xerographic surface 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 the 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 can then be developed by contacting it with a finely divided electrostatically attractable material such as a powder.
  • a finely divided electrostatically attractable material such as a powder.
  • the powder is held in image areas by the electrostatic charges on the layer. Where the charge field is greatest. the greatest amount of powder is deposited.
  • a powder image is produced in conformity with the light image of the document or object being reproduced.
  • the powder is subsequently transferred to a sheet of paper or other surface and suitably affixed thereto to form a permanent print.
  • a typical device for fixing the toner particles to the backing sheet is by passing it through pressure rolls at least one of which is heated.
  • the copy sheet is passed through the nip of a relatively hard metallic heated fuser roll and a relatively soft rubber backup roll as described, for example, in US. Pat. Nos. 3,256,002 and 3,268,351.
  • a problem may result particularly in the case of higher processing speeds and increased pressures when the soft pressure roll bulges out at the ends causing nonuniform loading on the ends and thus an unsatisfactory fused image and paper wrinkling.
  • the present invention is to obviate this bulging of the pressure roll at the ends so as to produce uniform loading along the entire length of the roll.
  • FIG. 1 is a schematic representation of an automatic xerographic reproducing machine incorporating a pressure heated fusing apparatus utilizing the improved pressure roll construction of the present invention
  • FIG. 2 is a side elevational view of the pressure heated fusing apparatus
  • FIG. 3 is a side elevational view of a prior art pressure roll construction
  • FIG. 4 is an elevational view of the pressure roll construction according to the present invention.
  • FIG. 1 of the drawings there is shown an embodiment of the invention in a suitable environment such as an automatic xerographic reproducing machine.
  • the automatic reproducing machine includes a xerographic plate or surface 10 formed in the shape of a drum.
  • the plate has a photoconductive layer or light receiving surface on a conductive backing journaled in a frame to rotate in the direction indicated by the arrow. The rotation will cause the plate surface to sequentially pass a series of xerographic processing stations.
  • the several xerographic processing stations in the path of movement of the plate surface may be described functionally as follows:
  • a transfer station D which the powdered image is electrostatically transferred from the plate surface to a transfer material such as paper which is then passed through a heated pressure fusing system having an improved oil applicating pad according to the present invention as will be described hereinafter;
  • Fuser roll 16 is a hollow circular cylinder with a metallic core 20 and a Teflon layer 22.
  • a quartz lamp 24 serves as a source of thermal energy and is located at the center of the fuser roll. Power to the lamp is controlled by a thermal sensor generally called a thermistor contacting the pe riphery of the fuser roll as described, for example, in US. Pat. No. 3,357,249.
  • the backup roll 18 is also a circular cylinder and is made up of a metal core 30 surrounded by a thick rubber layer 32 and also a Teflon layer 34 to prevent soaking silicone oil into rubber layer 32 and subsequent swelling.
  • the applied load deforms the rubber in the pressure roll to provide the nip with a finite width.
  • the copy sheet 40 electrostatically bearing the toner images 42 on the underside is brought into contact with the nip of the rolls with the toner image contacting the fuser roll 16.
  • the fusing rate will depend upon the contact arc length of the support material against the dwell time. i.e. the time the toner images remain between the fuser roll 16 and the backup roll 18. Dwell time can be varied either by changing the surface velocity of the rolls or by varying the contact arc length and holding the speed of the roll the same.
  • Contact arc length depends on the softness of the rubber on backup roll 18 and on the amount of pressure between the rolls l6 and 18.
  • the mechanism for driving the rolls and for lowering and raising the rolls into contact can be accomplished by any suitable means as that described. for example, in US. Pat. No. 3,29l .466 or by a suitable mechanical camming device.
  • the toner images on the support material will contact the peripheral heated surface of the roll 16 whereby the toner images become tackified and in this tackified condition the toner will tend to offset on this roll except that it is partially prevented from doing so by the Teflon coating on the roll.
  • An oil dispensing apparatus 45 includes wicking as sembly 48, an oil pan 50 for maintaining a supply of silicone oil 51 and an applicator roll 52.
  • the oil pan is loaded against the heated fuser roll 16 by a spring action mounting (not shown) as details of the mounting form no part of the present invention.
  • Applicator roll 52 is used to convey a thin film of oil to the bottom face 55 of the wicking assembly as the applicator roll is rotated in the direction shown by the arrow.
  • the applicator roll 52 is driven by an oil dispensing motor 58 which is energized during the fusing operation for a period depending upon the number of copies being produced.
  • the bulging is best shown by numeral in FIG. 3.
  • one or more thin stiffening members 92 are molded with the rubber of the pressure roll 18.
  • Members 92 are circular or spiral or any other desired shape and arranged around the axis of roll 18.
  • the stiffening members can be made of any suitable material. Preferred materials are stainless steel. aluminum, plasitc. fiber glass or combinations thereof.
  • the thickness of the members ranges from about 0.001 to about 0.0l0 inches. It has been found that bulging is minimized by the above construction with an accompanying improvement in copy quality.
  • an improved pressure roll device comprising.
  • said cylindrical member being formed with at least one thin stiffening member inserted at each of the ends thereof said stiffening members being circular in shape and having a thickness ranging from about .001 inches to about .010 inches to minimize end bulge to improve fusing and reduce wear.
  • stiffening members are made of stainless steel, aluminum, plastic, fiberglass or combinations thereof.
  • a pressure roll device according to claim 1 wherein said cylindrical member has an exterior layer which is impervious to oil.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fixing For Electrophotography (AREA)
US458159A 1974-04-05 1974-04-05 Pressure roll construction Expired - Lifetime US3883293A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US458159A US3883293A (en) 1974-04-05 1974-04-05 Pressure roll construction
CA222,186A CA1065388A (fr) 1974-04-05 1975-03-17 Structure d'un rouleau presseur
GB1362775A GB1474325A (en) 1974-04-05 1975-04-03 Pressure roll fusing system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US458159A US3883293A (en) 1974-04-05 1974-04-05 Pressure roll construction

Publications (1)

Publication Number Publication Date
US3883293A true US3883293A (en) 1975-05-13

Family

ID=23819618

Family Applications (1)

Application Number Title Priority Date Filing Date
US458159A Expired - Lifetime US3883293A (en) 1974-04-05 1974-04-05 Pressure roll construction

Country Status (3)

Country Link
US (1) US3883293A (fr)
CA (1) CA1065388A (fr)
GB (1) GB1474325A (fr)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4098631A (en) * 1976-08-18 1978-07-04 Eastman Kodak Company Method for manufacturing a compliant roller for use in an electrographic apparatus
US4253392A (en) * 1979-04-09 1981-03-03 International Business Machines Corporation Hollow fuser roll with variable taper
US4375505A (en) * 1981-10-22 1983-03-01 Eastman Kodak Company Fuser member
EP0077991A3 (en) * 1981-10-22 1983-07-27 Eastman Kodak Company Multilayer fuser member and method of making
US4430406A (en) 1981-10-22 1984-02-07 Eastman Kodak Company Fuser member
US5142760A (en) * 1989-06-01 1992-09-01 Xerox Corporation Articulating idler roll
US5267008A (en) * 1991-12-23 1993-11-30 Xerox Corporation Friction retard feeder with a composite feed element
US5807004A (en) * 1995-03-31 1998-09-15 Seiko Epson Corporation Roller for image forming apparatus
US5857643A (en) * 1995-06-07 1999-01-12 Eastman Kodak Company Core for winding a web of deformable material
US6311615B1 (en) * 1998-07-14 2001-11-06 Heidelberger Druckmaschinen Ag Composite nip roll and nip ring
USD463135S1 (en) 2000-10-19 2002-09-24 Susan Goans Driggers Roller cover
US20040157717A1 (en) * 2003-02-11 2004-08-12 Oh Hieyoung W. Fuser roll with improved heating performance
EP1916572A1 (fr) 2006-10-27 2008-04-30 Samsung Electronics Co., Ltd. Appareil de formation d'images avec une unité de fixage comprenant un rouleau de pression renforcé

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2123524B (en) * 1982-07-07 1985-12-18 Xerox Corp Rollers

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2031872A (en) * 1934-07-30 1936-02-25 Rapid Roller Company Roller
US2257025A (en) * 1936-07-15 1941-09-23 Schuster Fritz Rubber-faced roller
US2369635A (en) * 1941-04-19 1945-02-20 Dayton Rubber Mfg Co Covering for worsted type spinning rolls
US2374194A (en) * 1941-08-30 1945-04-24 Interchem Corp Pressure roller
US2501780A (en) * 1948-04-16 1950-03-28 Herbert J Lowe Cork printer's roller
US3141817A (en) * 1962-08-22 1964-07-21 Raybestos Manhattan Inc Suction press roll
US3368482A (en) * 1966-08-08 1968-02-13 Owens Illinois Inc Intaglio printing from stencil wrapped about cylinder
US3416435A (en) * 1966-06-13 1968-12-17 Beloit Corp Roller press
US3467009A (en) * 1965-07-06 1969-09-16 Grace W R & Co Compressible printing roll
US3718116A (en) * 1971-07-20 1973-02-27 Xerox Corp Oil dispensing apparatus
US3785286A (en) * 1964-06-18 1974-01-15 De La Rue Giori Sa Wiping cylinder of steel engraving printing machine and method of making it

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2031872A (en) * 1934-07-30 1936-02-25 Rapid Roller Company Roller
US2257025A (en) * 1936-07-15 1941-09-23 Schuster Fritz Rubber-faced roller
US2369635A (en) * 1941-04-19 1945-02-20 Dayton Rubber Mfg Co Covering for worsted type spinning rolls
US2374194A (en) * 1941-08-30 1945-04-24 Interchem Corp Pressure roller
US2501780A (en) * 1948-04-16 1950-03-28 Herbert J Lowe Cork printer's roller
US3141817A (en) * 1962-08-22 1964-07-21 Raybestos Manhattan Inc Suction press roll
US3785286A (en) * 1964-06-18 1974-01-15 De La Rue Giori Sa Wiping cylinder of steel engraving printing machine and method of making it
US3467009A (en) * 1965-07-06 1969-09-16 Grace W R & Co Compressible printing roll
US3416435A (en) * 1966-06-13 1968-12-17 Beloit Corp Roller press
US3368482A (en) * 1966-08-08 1968-02-13 Owens Illinois Inc Intaglio printing from stencil wrapped about cylinder
US3718116A (en) * 1971-07-20 1973-02-27 Xerox Corp Oil dispensing apparatus

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4098631A (en) * 1976-08-18 1978-07-04 Eastman Kodak Company Method for manufacturing a compliant roller for use in an electrographic apparatus
US4253392A (en) * 1979-04-09 1981-03-03 International Business Machines Corporation Hollow fuser roll with variable taper
US4375505A (en) * 1981-10-22 1983-03-01 Eastman Kodak Company Fuser member
EP0077991A3 (en) * 1981-10-22 1983-07-27 Eastman Kodak Company Multilayer fuser member and method of making
US4430406A (en) 1981-10-22 1984-02-07 Eastman Kodak Company Fuser member
US5142760A (en) * 1989-06-01 1992-09-01 Xerox Corporation Articulating idler roll
US5267008A (en) * 1991-12-23 1993-11-30 Xerox Corporation Friction retard feeder with a composite feed element
US5807004A (en) * 1995-03-31 1998-09-15 Seiko Epson Corporation Roller for image forming apparatus
US5857643A (en) * 1995-06-07 1999-01-12 Eastman Kodak Company Core for winding a web of deformable material
US6042048A (en) * 1995-06-07 2000-03-28 Eastman Kodak Company Core for winding a web of deformable material
US6311615B1 (en) * 1998-07-14 2001-11-06 Heidelberger Druckmaschinen Ag Composite nip roll and nip ring
USD463135S1 (en) 2000-10-19 2002-09-24 Susan Goans Driggers Roller cover
US20040157717A1 (en) * 2003-02-11 2004-08-12 Oh Hieyoung W. Fuser roll with improved heating performance
US7241253B2 (en) * 2003-02-11 2007-07-10 Illinois Tool Works Inc Fuser roll with improved heating performance
EP1916572A1 (fr) 2006-10-27 2008-04-30 Samsung Electronics Co., Ltd. Appareil de formation d'images avec une unité de fixage comprenant un rouleau de pression renforcé
US20080101829A1 (en) * 2006-10-27 2008-05-01 Samsung Electronics Co., Ltd. Image forming apparatus and method of manufacturing the same
US7650106B2 (en) 2006-10-27 2010-01-19 Samsung Electronics Co., Ltd. Pressure roller for an image forming apparatus and method of manufacturing the same
CN101169611B (zh) * 2006-10-27 2010-12-22 三星电子株式会社 成像设备以及用于制造该成像设备的方法
KR101287529B1 (ko) * 2006-10-27 2013-07-19 삼성전자주식회사 화상형성장치와 그 제조방법

Also Published As

Publication number Publication date
GB1474325A (en) 1977-05-25
CA1065388A (fr) 1979-10-30

Similar Documents

Publication Publication Date Title
US3718116A (en) Oil dispensing apparatus
US3989005A (en) Oil metering blade device
US3666247A (en) Fusing device and method
US4242566A (en) Heat-pressure fusing device
US3883293A (en) Pressure roll construction
US3649992A (en) Cleaning apparatus for fusing system
US3796183A (en) Free floating pressure biasing apparatus for cleaning roll fuser
US3745972A (en) Wicking apparatus
US3883292A (en) Sleeveless pressure roll cleaner
US3980424A (en) Fuser cleaning roller
US3868744A (en) Cleaning apparatus for heated pressure roll fuser
US3988817A (en) Pressure roll for dry fuser apparatus
US3831553A (en) Wick for oil dispensing apparatus
US3883921A (en) Cleaning roll apparatus having rejuvenated cleaning surface
US3841827A (en) Toner release oil transfer pad
US3743403A (en) Transport assembly
US3795441A (en) Transfer roller
US4082137A (en) Method and apparatus for fuser assembly cooling in an electrostatographic machine
US3961951A (en) Electrophotographic method for producing multiple copies from the same electrostatic image
US4339194A (en) Cold pressure fusing apparatus
US4335951A (en) Fusing apparatus
US3799401A (en) Silicone oil capacity control using polyurethane belt
US3770346A (en) Method and apparatus for fuser assembly cooling in an electrostatographic machine
US4057666A (en) Magnetic brush developer roll for electrostatic reproduction machines
US3954332A (en) Reproduction machine with improved transfer roll