US3841827A - Toner release oil transfer pad - Google Patents

Toner release oil transfer pad Download PDF

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Publication number
US3841827A
US3841827A US00369024A US36902473A US3841827A US 3841827 A US3841827 A US 3841827A US 00369024 A US00369024 A US 00369024A US 36902473 A US36902473 A US 36902473A US 3841827 A US3841827 A US 3841827A
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US
United States
Prior art keywords
pad
oil
fuser roll
visual
toner
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
US00369024A
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English (en)
Inventor
T Thettu
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 US00369024A priority Critical patent/US3841827A/en
Priority to CA194,652A priority patent/CA1025041A/en
Priority to DE19747409422U priority patent/DE7409422U/de
Priority to DE2418538A priority patent/DE2418538C3/de
Priority to FR7419739A priority patent/FR2232787B1/fr
Priority to IT23739/74A priority patent/IT1014869B/it
Priority to GB2572974A priority patent/GB1441370A/en
Priority to NL7407800A priority patent/NL7407800A/xx
Priority to BE145269A priority patent/BE816155A/xx
Application granted granted Critical
Publication of US3841827A publication Critical patent/US3841827A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • G03G15/20—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
    • G03G15/2017—Structural details of the fixing unit in general, e.g. cooling means, heat shielding means
    • G03G15/2025—Structural details of the fixing unit in general, e.g. cooling means, heat shielding means with special means for lubricating and/or cleaning the fixing unit, e.g. applying offset preventing fluid

Definitions

  • ABSTRACT An improved oil applicating pad for use in applying oil to the fuser roll surface of a heated pressure fusing system for fusing toner images.
  • the pad has a working surface made of silicone rubber material which resists visual and non-visual toner offset on the surface thereof.
  • the pad construction includes different embodiments which comprise sponge, reinforced fabric, and multiple layers of different material.
  • a xerographic 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.
  • One typical device for fixing the toner particles to the backing sheet is by a heated pressure fuser roll system in which the copy sheet is passed through the nip of a Teflon coated heated fuser roll and a backup roll as described in US. Pat. Nos. 3,256,002 and 3,268,35l.
  • care must be taken to remove unwanted toner particles from the heated fuser roll prior to its contact with the copy being fused. If care is not taken to keep the fuser roll free of toner particles, these toner particles can build up on the face of the fuser roll and degrade the quality of the fix by removing the fusing properties on the surface of the roll contacting the copy sheet and toner images.
  • a wick is generally used to dispense silicone oil on the external surface of the heated fuser roll by a pad overlying the heated fuser roll.
  • a new and improved wicking assembly which comprises a layer of silicone rubber which contacts the heated fuser roll on one side and is in contact with silicone oil on the other side.
  • FIG. 1 is a schematic representation of an automatic xerographic reproducing machine incorporating a heated pressure fusing system utilizing the improved wicking assembly of the present invention
  • FIG. 2 is a side elevational view of the heated pressure fusing system
  • FIG. 3 (a) is an exploded view of the silicone rubber pad of the present invention.
  • FIG. 3 (b) is an exploded view similar to FIG. 3 (a) illustrating an alternative embodiment of the pad.
  • FIG. 4 is an isometric view of an alternative embodiment of the oil applicating pad assembly illustrating a plurality of applicating layers.
  • 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 a 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 charging station A which the uniform electrostatic charge is deposited onto the photoconductive plate
  • 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 thermister contacting the periphery of the fuser roll as described, for example, in U.S. Pat. No. 3,357,249.
  • the backup roll 18 is also a circular cylinder and is made up of a metal core 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 mil 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 16 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 U.S. Pat. No. 3,291,466 or by a suitable mechanical cumming 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 65 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 assembly 48, an oil pan 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 wicking assembly 48 includes an oil applicating layer 62 made of silicone rubber with an embossed or rippled pattern 63 which contacts the surface of the heated fuser roll 16.
  • the oil applicating layer 62 prevents both visual and non-visual toner collection on its surface so that no restriction is placed on its ability to continually apply a thin film of silicone oil as a release agent on the fuser roll surface. While the phenomena of nonadhesion of toner to silicone rubber material is not completely understood, it has been observed that toner when tackified adheres to the fuser roll surface rather than to the silicone material surface.
  • the silicone rubber layer 62 can take the form of aunitary pad construction as shown in H0. 3(b).
  • the reinforced construction includes a iayer of silicone rubber 81 having a reinforced fiber 82 arranged in a crossed, woven or knitted pattern andwhich is molded in the silicone rubber layer.
  • Fiber members 82 may be made of any suitable heat stable material. Suitable material are ceramic, metallic, plastic or combinations thereof.
  • FIG. 4 A further embodiment of the invention is shown in FIG. 4 which incorporates a plurality of oil applicating layers 92 and 94.
  • Layer 94 is made of a suitable heat stable material with high oil transfer properties.
  • Layer 94 has its underside 55 in contact with the applicator roll 52 and its upperside in contact with silicone rubber layer 92.
  • Layers 92 and 94 are assembled in overlapping relationship and their ends are clamped between plates 66 and 68 which are secured by any suitable means such as screws 70.
  • an improved oil application pad comprising.
  • a pad device positioned in contact with a heated fuser roll to apply oil received by said pad member eontinuouslyto the surface of said heated 3.
  • a pad device wherein said fibers are made of a material selected from a group comprising, ceramic, metallic, plastic or combinations thereof.
  • a pad device according to claim 1 wherein said pad member includes a plurality of layers, at least one of said layers being made of a heat stable material other than silicone rubber.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fixing For Electrophotography (AREA)
  • Developing Agents For Electrophotography (AREA)
US00369024A 1973-06-11 1973-06-11 Toner release oil transfer pad Expired - Lifetime US3841827A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
US00369024A US3841827A (en) 1973-06-11 1973-06-11 Toner release oil transfer pad
CA194,652A CA1025041A (en) 1973-06-11 1974-03-08 Toner release oil transfer pad
DE19747409422U DE7409422U (de) 1973-06-11 1974-03-18 Tonerloesendes oeluebertragungskissen
DE2418538A DE2418538C3 (de) 1973-06-11 1974-04-17 Antragkissen
FR7419739A FR2232787B1 (enrdf_load_stackoverflow) 1973-06-11 1974-06-07
IT23739/74A IT1014869B (it) 1973-06-11 1974-06-07 Dispositivo a tampone migliorato particolarmente per applicare olio sulla superficie del rullo di fu sione di una macchina xerografica
GB2572974A GB1441370A (en) 1973-06-11 1974-06-10 Toner release oil transfer pad
NL7407800A NL7407800A (enrdf_load_stackoverflow) 1973-06-11 1974-06-11
BE145269A BE816155A (fr) 1973-06-11 1974-06-11 Dispositif applicateur d'huile anti-revelateur pour dispositif de fusion de copieur xerographique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00369024A US3841827A (en) 1973-06-11 1973-06-11 Toner release oil transfer pad

Publications (1)

Publication Number Publication Date
US3841827A true US3841827A (en) 1974-10-15

Family

ID=23453744

Family Applications (1)

Application Number Title Priority Date Filing Date
US00369024A Expired - Lifetime US3841827A (en) 1973-06-11 1973-06-11 Toner release oil transfer pad

Country Status (8)

Country Link
US (1) US3841827A (enrdf_load_stackoverflow)
BE (1) BE816155A (enrdf_load_stackoverflow)
CA (1) CA1025041A (enrdf_load_stackoverflow)
DE (2) DE7409422U (enrdf_load_stackoverflow)
FR (1) FR2232787B1 (enrdf_load_stackoverflow)
GB (1) GB1441370A (enrdf_load_stackoverflow)
IT (1) IT1014869B (enrdf_load_stackoverflow)
NL (1) NL7407800A (enrdf_load_stackoverflow)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3943540A (en) * 1974-04-24 1976-03-09 Addressograph-Multigraph Corporation Photographic developing apparatus
US3964431A (en) * 1973-06-01 1976-06-22 Ricoh Co., Ltd. Device for supplying an offset preventing liquid to a fixing roller
US4071735A (en) * 1976-11-01 1978-01-31 Xerox Corporation Externally heated low-power roll fuser
US4501483A (en) * 1983-09-02 1985-02-26 Eastman Kodak Company Fuser apparatus
US4743943A (en) * 1987-01-12 1988-05-10 International Business Machines Corporation Renewable fuser wick
US4777903A (en) * 1987-04-06 1988-10-18 Xerox Corporation Reservoir wick system
US5278617A (en) * 1992-12-04 1994-01-11 Xerox Corporation Modified donor roll
US6289812B1 (en) * 1996-01-23 2001-09-18 G. R. Advanced Materials Ltd. Printing process for applying a composition using a stencil or digital duplicator
US20060257155A1 (en) * 2005-05-12 2006-11-16 Xerox Corporation Fuser roll using radio frequency identification

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0126415B1 (en) * 1983-05-19 1987-03-25 Sumitomo Electric Industries Limited Release agent applicator for use with copying machine

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2241554A (en) * 1937-12-23 1941-05-13 Int Paper Co Apparatus for manufacturing paper
US2313127A (en) * 1939-09-25 1943-03-09 Ditto Inc Moistening mechanism
US2533574A (en) * 1946-01-28 1950-12-12 Block & Anderson Ltd Moistening mechanism for duplicating machines
US2534765A (en) * 1948-05-06 1950-12-19 Ditto Inc Liquid applicator for duplicating machines
US2704029A (en) * 1951-08-01 1955-03-15 Davidson Corp Device for cleaning inked printing surfaces of rotary duplicating machines
US3081206A (en) * 1956-12-31 1963-03-12 Robert W Hannah Press roller, and method of producing same
US3449548A (en) * 1966-12-30 1969-06-10 Xerox Corp Fusing device
US3573964A (en) * 1968-06-11 1971-04-06 Fisons Ind Chemicals Ltd Process for preparing fabric-vinyl resin laminates
US3637976A (en) * 1969-06-14 1972-01-25 Ricoh Kk Fixing device of toner images
US3718116A (en) * 1971-07-20 1973-02-27 Xerox Corp Oil dispensing apparatus
US3731358A (en) * 1971-05-20 1973-05-08 Addressograph Multigraph Roll for pressure fusing toner at elevated temperatures

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2241554A (en) * 1937-12-23 1941-05-13 Int Paper Co Apparatus for manufacturing paper
US2313127A (en) * 1939-09-25 1943-03-09 Ditto Inc Moistening mechanism
US2533574A (en) * 1946-01-28 1950-12-12 Block & Anderson Ltd Moistening mechanism for duplicating machines
US2534765A (en) * 1948-05-06 1950-12-19 Ditto Inc Liquid applicator for duplicating machines
US2704029A (en) * 1951-08-01 1955-03-15 Davidson Corp Device for cleaning inked printing surfaces of rotary duplicating machines
US3081206A (en) * 1956-12-31 1963-03-12 Robert W Hannah Press roller, and method of producing same
US3449548A (en) * 1966-12-30 1969-06-10 Xerox Corp Fusing device
US3573964A (en) * 1968-06-11 1971-04-06 Fisons Ind Chemicals Ltd Process for preparing fabric-vinyl resin laminates
US3637976A (en) * 1969-06-14 1972-01-25 Ricoh Kk Fixing device of toner images
US3731358A (en) * 1971-05-20 1973-05-08 Addressograph Multigraph Roll for pressure fusing toner at elevated temperatures
US3718116A (en) * 1971-07-20 1973-02-27 Xerox Corp Oil dispensing apparatus

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3964431A (en) * 1973-06-01 1976-06-22 Ricoh Co., Ltd. Device for supplying an offset preventing liquid to a fixing roller
US3943540A (en) * 1974-04-24 1976-03-09 Addressograph-Multigraph Corporation Photographic developing apparatus
US4071735A (en) * 1976-11-01 1978-01-31 Xerox Corporation Externally heated low-power roll fuser
US4501483A (en) * 1983-09-02 1985-02-26 Eastman Kodak Company Fuser apparatus
US4743943A (en) * 1987-01-12 1988-05-10 International Business Machines Corporation Renewable fuser wick
US4777903A (en) * 1987-04-06 1988-10-18 Xerox Corporation Reservoir wick system
US5278617A (en) * 1992-12-04 1994-01-11 Xerox Corporation Modified donor roll
US6289812B1 (en) * 1996-01-23 2001-09-18 G. R. Advanced Materials Ltd. Printing process for applying a composition using a stencil or digital duplicator
US20060257155A1 (en) * 2005-05-12 2006-11-16 Xerox Corporation Fuser roll using radio frequency identification

Also Published As

Publication number Publication date
GB1441370A (en) 1976-06-30
IT1014869B (it) 1977-04-30
FR2232787A1 (enrdf_load_stackoverflow) 1975-01-03
CA1025041A (en) 1978-01-24
DE2418538B2 (de) 1978-05-03
DE2418538A1 (de) 1975-01-02
FR2232787B1 (enrdf_load_stackoverflow) 1977-06-17
DE7409422U (de) 1974-06-20
DE2418538C3 (de) 1979-01-18
NL7407800A (enrdf_load_stackoverflow) 1974-12-13
BE816155A (fr) 1974-09-30

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