EP0174474A1 - Trennmittelauftragsvorrichtung - Google Patents

Trennmittelauftragsvorrichtung Download PDF

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Publication number
EP0174474A1
EP0174474A1 EP85109229A EP85109229A EP0174474A1 EP 0174474 A1 EP0174474 A1 EP 0174474A1 EP 85109229 A EP85109229 A EP 85109229A EP 85109229 A EP85109229 A EP 85109229A EP 0174474 A1 EP0174474 A1 EP 0174474A1
Authority
EP
European Patent Office
Prior art keywords
applicator
release agent
housing
pressing
section
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.)
Withdrawn
Application number
EP85109229A
Other languages
English (en)
French (fr)
Inventor
Takao C/O Kumatori Works Ogino
Akio c/o Kumatori Works Matsuda
Chiaki C/O Kumatori Works Kato
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.)
Sumitomo Electric Industries Ltd
Original Assignee
Sumitomo Electric Industries Ltd
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 Sumitomo Electric Industries Ltd filed Critical Sumitomo Electric Industries Ltd
Publication of EP0174474A1 publication Critical patent/EP0174474A1/de
Withdrawn legal-status Critical Current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
    • G03G15/20—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
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/20—Details of the fixing device or porcess
    • G03G2215/2093—Release agent handling devices
    • G03G2215/2096—Release agent handling devices using porous fluoropolymers for wicking the release agent

Definitions

  • the present invention relates to devices for applying a release agent, and more particularly to devices for applying a release agent in fixing devices of plain paper copiers and facsimiles.
  • FIGURES 1, 2A and 2B it is conventional in a plain paper copier or a facsimile to fix a toner image 10 on a sheet 12 by passing sheet 12 between an elastic roller 14 and a fixing roller 16 heated by heater 18.
  • a release agent usually silicone oil
  • Conventional release agent applicators may include either a heat-resistant felt 20 impregnated with the release agent as shown in FIGURE 1 or a porous polytetrafluoroethylene tube 22 filled with release agent 28 as shown in FIGURES 2A and 2B.
  • a layer 24 of material that closes pores in tube 22 surrounds all of tube 22 except the portion that contacts fixing roller 16.
  • Tube 22 may be carried by a support plate 26. Either of these applicators may be of the disposable type.
  • Heat resistant felt applicator 20, illustrated in FIGURE 1 has a relatively short life (i.e., only about 10,000 copies are obtained from a fixing roll fed with the release agent by applicator 20). Toner or paper particles deposited on the felt surface either prevent further application of the silicone oil or damage the surface of the fixing roller. Also, the amount of oil applied in the initial period is so great as to cause frequent staining of the copy paper.
  • FIGURES 2A and 2B The overall shape and construction of the porous tube applicator illustrated in FIGURES 2A and 2B are complex because this applicator requires its peripheral portion to be masked, its two ends to be sealed, and the provision of air vents. Also, oil leakage may occur during transportation or storage of the applicator or upon standing after it is set in the copier.
  • the present invention eliminates these problems associated with conventional release agent applicators.
  • the applicator of the present invention includes a solid, or non-hollow, porous body of a fluoropolymer that is impregnated with a release agent.
  • the porous body may have a round, rectangular or triangular cross section. The body applies release agent by being pressed against the fixing roller.
  • the present invention enables simple and uniform application of the release agent.
  • an applicator in accordance with one embodiment of this invention includes a solid, or non-hollow, porous body 30 of a fluoropolymer such as polytetrafluoroethylene ("Poreflon" of Sumitomo Electric Industries, Ltd.) set in a housing 32 which serves as a support member.
  • Housing 32 is made of metal or a heat-resistant plastic (polyphenylene sulfide (PPS), or polybutylene terephthalate (PBT)).
  • Porous body 30 of fluoropolymer is impregnated with a release agent such as silicone oil.
  • porous fluropolymer body 30 is secured to housing 32 by bolts 34 or other suitable means.
  • porous body 30 may be impregnated with release agent prior to or after being set in housing 32.
  • Porous body 30 is fabricated by extrusion techniques and may be provided with a variety of cross-sectional shapes such as shown in FIGURES 4A - 4C, depending upon the shape of the extrusion die used.
  • the porosity of body 30 is preferably in the range of 25 - 85%.
  • the viscosity of the release agent typically silicone oil, may preferably be in the range of 500 - 100,000 cs depending upon the required amount of oil to be applied. The more preferred viscosity range is from 1,000 to 50,000 cs.
  • the oil may be impregnated in body 30 by simply submerging it in the oil. If quick impregnation is desired, the oil may be heated or placed in a vacuum atmosphere.
  • Fixing roller 16 in FIGURE 5 had such a rotating speed as to process 12 sheets of paper (21 cm x 29.7 cm) per minute.
  • Applicator 40 in accordance with the present invention was pressed against fixing roller 16 by leaf spring 42 attached to heater cover 44.
  • Paper guide 13 guided paper between rollers 16 and 14.
  • the release agent applicator in accordance with the present invention is advantageous in that it has a very long service life and can be used virtually permanently by repeating the impregnation with silicone oil. Also it applies a uniform and small quantity of the oil from the beginning to the end of service. No oil staining of the copy paper occurs in the initial period of application.
  • the applicator has a simple configuration and oil is retained in the pores in the fluoropolymer by capillary action, so no oil leak will occur during trans- portion or storage, or even upon standing after setting the device in the fixing apparatus.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fixing For Electrophotography (AREA)
  • Coating Apparatus (AREA)
EP85109229A 1984-08-31 1985-07-23 Trennmittelauftragsvorrichtung Withdrawn EP0174474A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP183024/84 1984-08-31
JP18302484A JPS6161663A (ja) 1984-08-31 1984-08-31 離型剤塗布装置

Publications (1)

Publication Number Publication Date
EP0174474A1 true EP0174474A1 (de) 1986-03-19

Family

ID=16128402

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85109229A Withdrawn EP0174474A1 (de) 1984-08-31 1985-07-23 Trennmittelauftragsvorrichtung

Country Status (2)

Country Link
EP (1) EP0174474A1 (de)
JP (1) JPS6161663A (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0240834A1 (de) * 1986-04-11 1987-10-14 Siemens Aktiengesellschaft Einrichtung zum Heissfixieren von Tonerbildern aus thermoplastischem Tonermaterial
WO1993008512A1 (en) * 1991-10-26 1993-04-29 W.L. Gore & Associates (Uk) Limited Oil transfer component
WO1995009385A1 (en) * 1993-09-28 1995-04-06 W.L. Gore & Associates, Inc. Improved release agent supply wick for printer apparatus and method for making and using same
GB2285768A (en) * 1994-01-19 1995-07-26 Gore & Ass Layered oil transfer component
EP0661610A3 (de) * 1993-12-29 1996-03-06 Fuji Xerox Co Ltd Fixiergerät für ein Bilderzeugungsgerät.
US6143675A (en) * 1995-06-07 2000-11-07 W. L. Gore & Associates (Uk) Ltd. Porous composite

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2581963B2 (ja) * 1987-08-24 1997-02-19 富士写真フイルム株式会社 直接ポジ画像形成方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3016098A1 (de) * 1979-04-28 1980-11-13 Canon Kk Fixiervorrichtung
GB2093769A (en) * 1981-02-19 1982-09-08 Sumitomo Electric Industries Fixing toner images

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3016098A1 (de) * 1979-04-28 1980-11-13 Canon Kk Fixiervorrichtung
GB2093769A (en) * 1981-02-19 1982-09-08 Sumitomo Electric Industries Fixing toner images

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
PATENTS ABSTRACTS OF JAPAN, vol. 6, no. 156 (P-135)[1034], 17th August 1982; & JP - A - 57 72 172 (CANON K.K.) 06-05-1982 *
PATENTS ABSTRACTS OF JAPAN, vol. 6, no. 252 (P-161)[1130], 10th December 1982; & JP - A - 57 147 674 (SUMITOMO DENKI KOGYO K.K.) 11-09-1982 *
PATENTS ABSTRACTS OF JAPAN, vol. 6, no. 51 (P-108)[929], 6th April 1982; & JP - A - 56 165 176 (CANON K.K.) 18-12-1981 *
PATENTS ABSTRACTS OF JAPAN, vol. 7, no. 67 (P-184)[1212], 19th March 1983; & JP - A - 57 211 179 (RICOH K.K.) 24-12-1982 *

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0240834A1 (de) * 1986-04-11 1987-10-14 Siemens Aktiengesellschaft Einrichtung zum Heissfixieren von Tonerbildern aus thermoplastischem Tonermaterial
WO1993008512A1 (en) * 1991-10-26 1993-04-29 W.L. Gore & Associates (Uk) Limited Oil transfer component
WO1995009385A1 (en) * 1993-09-28 1995-04-06 W.L. Gore & Associates, Inc. Improved release agent supply wick for printer apparatus and method for making and using same
US5478423A (en) * 1993-09-28 1995-12-26 W. L. Gore & Associates, Inc. Method for making a printer release agent supply wick
US5690739A (en) * 1993-09-28 1997-11-25 W. L. Gore & Associates, Inc. Release agent supply wick for printer apparatus and method for making and using same
US5709748A (en) * 1993-09-28 1998-01-20 W. L. Gore & Associates, Inc. Release agent supply wick for printer apparatus
EP0661610A3 (de) * 1993-12-29 1996-03-06 Fuji Xerox Co Ltd Fixiergerät für ein Bilderzeugungsgerät.
US5619315A (en) * 1993-12-29 1997-04-08 Fuji Xerox Co., Ltd. Fixing apparatus using a coated elastic member for use in an image forming apparatus
GB2285768A (en) * 1994-01-19 1995-07-26 Gore & Ass Layered oil transfer component
GB2285768B (en) * 1994-01-19 1997-09-17 Gore & Ass Layered oil transfer component
US6143675A (en) * 1995-06-07 2000-11-07 W. L. Gore & Associates (Uk) Ltd. Porous composite

Also Published As

Publication number Publication date
JPS6161663A (ja) 1986-03-29

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Inventor name: KATO, CHIAKIC/O KUMATORI WORKS

Inventor name: MATSUDA, AKIOC/O KUMATORI WORKS

Inventor name: OGINO, TAKAOC/O KUMATORI WORKS