EP0071969A2 - Fixiergerät für ein elektrostatisches Photokopiergerät - Google Patents

Fixiergerät für ein elektrostatisches Photokopiergerät Download PDF

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Publication number
EP0071969A2
EP0071969A2 EP82107016A EP82107016A EP0071969A2 EP 0071969 A2 EP0071969 A2 EP 0071969A2 EP 82107016 A EP82107016 A EP 82107016A EP 82107016 A EP82107016 A EP 82107016A EP 0071969 A2 EP0071969 A2 EP 0071969A2
Authority
EP
European Patent Office
Prior art keywords
heating roller
gear
copying machine
heat resistant
fixation apparatus
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Withdrawn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
EP82107016A
Other languages
English (en)
French (fr)
Other versions
EP0071969A3 (de
Inventor
Masahiro Murakami
Masahiro Yoshioka
Eiji Tsutsui
Noriyuki Iwao
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.)
Kyocera Mita Industrial Co Ltd
Original Assignee
Mita Industrial Co 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 Mita Industrial Co Ltd filed Critical Mita Industrial Co Ltd
Publication of EP0071969A2 publication Critical patent/EP0071969A2/de
Publication of EP0071969A3 publication Critical patent/EP0071969A3/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Withdrawn legal-status Critical Current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
    • G03G15/2053—Structural details of heat elements, e.g. structure of roller or belt, eddy current, induction heating

Definitions

  • the present invention relates to a fixation apparatus for an electrostatic photographic copying machine comprising a heating roller provided with a heater, a bearing for rotatably supporting said heating roller, a heating bush arranged between said bearing and said heating roller, and a gear or a sprocket for revolving said heating roller fixedly mounted on said roller.
  • FIG. 5 designates a heating roller consisting of a pair of bosses consisting of a left boss (22') and a right boss (23') , a cylindrical body (24') fixedly mounted on said bosses (22', 23') and a coating (25') made of fluorine containing resin such as Teflon (Tr Mark) surrounding said cylindrical body (24') and provide with a heater (26') therein.
  • a heating roller consisting of a pair of bosses consisting of a left boss (22') and a right boss (23') , a cylindrical body (24') fixedly mounted on said bosses (22', 23') and a coating (25') made of fluorine containing resin such as Teflon (Tr Mark) surrounding said cylindrical body (24') and provide with a heater (26') therein.
  • Said left boss (22') and rigL boss (23') are provided with a heat resistant bush (29', 29') by means of a stopper ring (28', 28'), respectivel said heating roller (13') being rotatably supported on a left side plate (18') and a right side plate (19') by means of a pair of flange bearings consisting of a left flange bearing (30') and a right flange bearing (34') put on said heat resistant bushes (29', 29') .
  • a gear (27') for driving said heating roller (13') (although a sprocket may be used, only the cases of a gear will be described hereinafter) is fixedly mounted on the outer end of said boss (23 ' ) by means of a bolt (33') engaging with a notch (32') formed in said boss (23').
  • the conventional gear of this type has the defect that comparatively large noises are developed when rotating in an engagement with a gear not described in the drawing since said gear (27') is fabricated from sintered alloys owing to mechanical strength and heat resistance required for gears.
  • the fixation apparatus for an electrostatic photographic copying machine comprising a heating roller provided with a heater, a bearing for rotatably supporting said heating roller, a heating bush arranged between said bearing and said heating roller, and a gear or a sprocket for revolving said heating roller fixedly mounted on said roller which is characterized in that said heat resistant bush (31) and said gear (27) or sprocket are formed integrally from a resin material having a lower coefficient of thermal conductivity, an excellent heat resistance and the mechanical strength required for gears.
  • said resin materials are a polyamide resin or a polyimide resin.
  • FIG. 1 shows the outline of the construction of an electrostatic photographic copying machine provided with a fixation f apparatus (1) according to the present invention.
  • a charging apparatus (3), an exposure apparatus (4), a development apparatus (5), a transfer apparatus (6) and a cleaning apparatus (7) are arranged in the circumference of a rotary drum (2) the outer circumference of which is covered with a light-sensitive material.
  • Paper-supplying apparatus (8), (9), a paper-transfer roller (10), said fixation apparatus (1) and a paper-discharging apparatus (11) are arranged in from and rear of said transfer apparatus (6) to form a copying paper-transfer course (12).
  • FIGS. 2 to 4 show a fixation apparatus (1) according to the present invention in detail.
  • a pressing roller (14) which is covered with heat resistant rubber along the outer circumference thereof, is placed under said heating rolle " (13), said pressing roller (14) being rotatably supported by means of a pair of supporting members consisting of a left supporting member (15) and a right supporting member (16).
  • Said both supporting members (15,16) are swingably pivoted on side plates (18 , 19) by means of a shaft (17) projectedly mounted on one end thereof, elastically energized toward said heating roller (13) by means of springs (20 , 21) extending from another end thereof to said side plates (18,19) and thereby said pressing roller (14) being engaged with said heating roller (13) to press said pressing roller (14) onto said heating roller (13).
  • Said heating roller (13) itself consists of a pair of bosses consisting of a left boss (22) and a right boss (23) made of stainless steel, a cylindrical body (24) made of for example aluminium fixedly mounted on said bosses (22), (23) and a coating (25) made of fluorine containing resin such as Teflon (Trade Mark) surrounding said cylindrical body (24) and being provided with a heater (26) therein in the same manner as the conventional ones.
  • Said boss (22), which is not provided with a gear (27), is provided with a heat resistant bush (29) onthe outer circumference thereof by means of a stopper ring (28) in the same manner as the conventional ones, a flange bearing (30) being put on said heat resistant bush (19), and said bearing (30) being fixedly mounted on said side plate (18).
  • a heat resistant bush (31) and said gear (27) are put on said boss (23) which is provided with said gear (27), as clearly shown in FIGS.
  • said heat resistant bush (31) is fabricated integrally with said gear (27) and fixedly mounted on said boss (23) by means of a bolt (33) engaging with a notch (32) formed in said boss (23), and a flange bearing (34) put on a heat resistant bush (31) being fixedly mounted on said side plate (19).
  • Said heat resistant bush (31) and said gear (27) are made of various kinds of resin for example a polyamide resin or a polyimide resin (for example "TONI METAL” (Trade Mark) sold by Shinko Sangyo Co., Ltd., Sagamihara, Kanagawa, Japan and "MELDIN” (Trade Mark) sold by The Toyo Bearing Mfg.
  • a heat resistant bush arranged between a bearing and said heating roller and a gear or a sprocket for revolving a heating roller are made of a resin material having a lower coefficient of thermal conductivity, an excellent heat resistance and the mechanical strength required for gears and thereby the rotation of a gear or a sprocket generates remarkably smaller noises as compared with those of the prior art made of sintered alloys, making a quiet operation possible, and the quantity of heat lost through said gear of sprocket being limited to the minimum value which allows for heating said heating roller effectively.
  • said heat resistant bush can be formed integrally with said gear or sprocket for revolving said heating roller since they are made of the same material and thereby the assembly onto said heating roller can be simply and easily achieved by means of at least one assembling means.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fixing For Electrophotography (AREA)
  • Rolls And Other Rotary Bodies (AREA)
EP82107016A 1981-08-08 1982-08-03 Fixiergerät für ein elektrostatisches Photokopiergerät Withdrawn EP0071969A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP118486/81 1981-08-08
JP11848681U JPS5823356U (ja) 1981-08-08 1981-08-08 静電写真複写機における定着装置

Publications (2)

Publication Number Publication Date
EP0071969A2 true EP0071969A2 (de) 1983-02-16
EP0071969A3 EP0071969A3 (de) 1983-04-20

Family

ID=14737863

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82107016A Withdrawn EP0071969A3 (de) 1981-08-08 1982-08-03 Fixiergerät für ein elektrostatisches Photokopiergerät

Country Status (2)

Country Link
EP (1) EP0071969A3 (de)
JP (1) JPS5823356U (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0506046A3 (de) * 1991-03-26 1994-04-13 Kanegafuchi Chemical Ind
US7348701B2 (en) * 2003-12-27 2008-03-25 Samsung Electronics Co., Ltd. Driving unit and image forming apparatus

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH065427B2 (ja) * 1983-12-29 1994-01-19 キヤノン株式会社 定着装置
JPH0693154B2 (ja) * 1987-11-06 1994-11-16 日立工機株式会社 電子写真装置における定着装置
JP4250309B2 (ja) * 2000-05-25 2009-04-08 キヤノン株式会社 像加熱装置
JP4561284B2 (ja) * 2004-09-30 2010-10-13 コニカミノルタビジネステクノロジーズ株式会社 定着装置
JP5008519B2 (ja) * 2007-10-17 2012-08-22 株式会社リコー 定着装置、画像形成装置、及び、フレーム

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3942887A (en) * 1974-05-28 1976-03-09 Xerox Corporation Drive mechanism for a roll fuser employed in a copier apparatus
JPS563724Y2 (de) * 1975-12-04 1981-01-27
US4229950A (en) * 1979-03-02 1980-10-28 Eastman Kodak Company Coupling for end gudgeon and internally heated roller
US4395109A (en) * 1979-06-11 1983-07-26 Tokyo Shibaura Denki Kabushiki Kaisha Fixing device for electronic duplicator machine
JPS56113179A (en) * 1980-02-14 1981-09-05 Konishiroku Photo Ind Co Ltd Heat roller fixing device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0506046A3 (de) * 1991-03-26 1994-04-13 Kanegafuchi Chemical Ind
US5362943A (en) * 1991-03-26 1994-11-08 Kanegafuchi Kagaku Kogyo Kabushiki Kaisha Fixing device and heat roller therefor
US5420392A (en) * 1991-03-26 1995-05-30 Kanegafuchi Kagaku Kogyo Kabushiki Kaisha Fixing device and heat roller therefor
US7348701B2 (en) * 2003-12-27 2008-03-25 Samsung Electronics Co., Ltd. Driving unit and image forming apparatus

Also Published As

Publication number Publication date
EP0071969A3 (de) 1983-04-20
JPS646517Y2 (de) 1989-02-20
JPS5823356U (ja) 1983-02-14

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Effective date: 19830721

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Effective date: 19840822

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Inventor name: YOSHIOKA, MASAHIRO

Inventor name: MURAKAMI, MASAHIRO

Inventor name: TSUTSUI, EIJI

Inventor name: IWAO, NORIYUKI