EP0833223A3 - Fixing device - Google Patents

Fixing device Download PDF

Info

Publication number
EP0833223A3
EP0833223A3 EP97114388A EP97114388A EP0833223A3 EP 0833223 A3 EP0833223 A3 EP 0833223A3 EP 97114388 A EP97114388 A EP 97114388A EP 97114388 A EP97114388 A EP 97114388A EP 0833223 A3 EP0833223 A3 EP 0833223A3
Authority
EP
European Patent Office
Prior art keywords
heat
resistant sheet
fixing roller
slash
temperature
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.)
Granted
Application number
EP97114388A
Other languages
German (de)
French (fr)
Other versions
EP0833223A2 (en
EP0833223B1 (en
Inventor
Masaru Tsuji
Shin-Ichi Azumi
Kouji Yamaji
Atsushi Kadoya
Toshiaki Kagawa
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.)
Sharp Corp
Original Assignee
Sharp 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
Priority claimed from JP25565196A external-priority patent/JP3763369B2/en
Application filed by Sharp Corp filed Critical Sharp Corp
Publication of EP0833223A2 publication Critical patent/EP0833223A2/en
Publication of EP0833223A3 publication Critical patent/EP0833223A3/en
Application granted granted Critical
Publication of EP0833223B1 publication Critical patent/EP0833223B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • G03G15/2028—Structural details of the fixing unit in general, e.g. cooling means, heat shielding means with means for handling the copy material in the fixing nip, e.g. introduction guides, stripping means
    • 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
    • G03G15/2064—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat using contact heat combined with pressure

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fixing For Electrophotography (AREA)

Abstract

A heat-resistant sheet, which has at least one slash alone formed therein, is provided between a fixing roller and a pressure member. The heat-resistant sheet, which has a thickness of 300 µm, is coated with a synthetic resin material having superior toner-releasing and heat-resisting properties, or incorporates such a synthetic resin material inside thereof. Here, a recording material is transported between the fixing roller and the heat-resistant sheet. As the surface temperature of the fixing roller rises, the heat-resistant sheet starts expanding gradually, causing its surface to be warped. However, unless the temperature of the fixing roller exceeds a set temperature, the expansion of the heat-resistant sheet and its surface deflection are all absorbed by the slash. Therefore, it is possible to keep an optimal nip width while maintaining a proper applied pressure of the pressure member, without the necessity of using a heat-releasing device or increase the thickness of the heat-resistant sheet. As a result, a superior fixing operation is available by using the heat-resistant sheet having the slash alone.
EP19970114388 1996-09-27 1997-08-20 Fixing device Expired - Lifetime EP0833223B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP25565196A JP3763369B2 (en) 1995-10-26 1996-09-27 Fixing device
JP255651/96 1996-09-27
JP25565196 1996-09-27

Publications (3)

Publication Number Publication Date
EP0833223A2 EP0833223A2 (en) 1998-04-01
EP0833223A3 true EP0833223A3 (en) 1998-12-30
EP0833223B1 EP0833223B1 (en) 2001-11-14

Family

ID=17281721

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19970114388 Expired - Lifetime EP0833223B1 (en) 1996-09-27 1997-08-20 Fixing device

Country Status (2)

Country Link
EP (1) EP0833223B1 (en)
DE (1) DE69708245T2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002082551A (en) * 2000-06-30 2002-03-22 Ricoh Co Ltd Fixing device and image forming device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02131275A (en) * 1988-11-11 1990-05-21 Nhk Spring Co Ltd Heat fixing roll device for electrophotographic device
JPH05119559A (en) * 1991-10-29 1993-05-18 Fuji Xerox Co Ltd Sheet guide device for image forming device
JPH0863016A (en) * 1994-08-25 1996-03-08 Kyocera Corp Fixing device
DE19600211A1 (en) * 1995-03-03 1996-09-05 Sharp Kk Toner fusion assembly for photocopier image fixing station
EP0770935A2 (en) * 1995-10-26 1997-05-02 Sharp Kabushiki Kaisha Fixing device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02131275A (en) * 1988-11-11 1990-05-21 Nhk Spring Co Ltd Heat fixing roll device for electrophotographic device
JPH05119559A (en) * 1991-10-29 1993-05-18 Fuji Xerox Co Ltd Sheet guide device for image forming device
JPH0863016A (en) * 1994-08-25 1996-03-08 Kyocera Corp Fixing device
DE19600211A1 (en) * 1995-03-03 1996-09-05 Sharp Kk Toner fusion assembly for photocopier image fixing station
EP0770935A2 (en) * 1995-10-26 1997-05-02 Sharp Kabushiki Kaisha Fixing device

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 014, no. 358 (P - 1087) 2 August 1990 (1990-08-02) *
PATENT ABSTRACTS OF JAPAN vol. 017, no. 485 (P - 1605) 2 September 1993 (1993-09-02) *
PATENT ABSTRACTS OF JAPAN vol. 096, no. 007 31 July 1996 (1996-07-31) *

Also Published As

Publication number Publication date
DE69708245D1 (en) 2001-12-20
DE69708245T2 (en) 2002-06-27
EP0833223A2 (en) 1998-04-01
EP0833223B1 (en) 2001-11-14

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