JP2001282039A5 - - Google Patents

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Publication number
JP2001282039A5
JP2001282039A5 JP2000099080A JP2000099080A JP2001282039A5 JP 2001282039 A5 JP2001282039 A5 JP 2001282039A5 JP 2000099080 A JP2000099080 A JP 2000099080A JP 2000099080 A JP2000099080 A JP 2000099080A JP 2001282039 A5 JP2001282039 A5 JP 2001282039A5
Authority
JP
Japan
Prior art keywords
sheet
fixing
predetermined
sheet feeding
pressure roller
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.)
Pending
Application number
JP2000099080A
Other languages
Japanese (ja)
Other versions
JP2001282039A (en
Filing date
Publication date
Application filed filed Critical
Priority to JP2000099080A priority Critical patent/JP2001282039A/en
Priority claimed from JP2000099080A external-priority patent/JP2001282039A/en
Publication of JP2001282039A publication Critical patent/JP2001282039A/en
Publication of JP2001282039A5 publication Critical patent/JP2001282039A5/ja
Pending legal-status Critical Current

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Description

【0037】
そして、ホストコンピュータ200から印字開始信号を制御手段19が受け取ると、第一の給紙口としての給紙カセット6側の給紙手段または第二の給紙口としての手差しトレイ(MPトレイ)10側の給紙手段が作動して用紙の給紙がなされ、給送された用紙Pが所定の制御タイミングにて転写ニップ部Tに導入されて挟持搬送されていく。用紙Pが転写ニップ部Tを挟持搬送されている間、転写ローラ5には不図示の転写バイアス印加電源から所定に制御された転写電圧が印加される。転写電圧の極性はトナーの帯電極性とは逆極性である。これにより転写ニップ部Tにおいて感光ドラム1上のトナー像が用紙Pの表面に順次に静電転写されていく。
[0037]
When the control unit 19 receives a print start signal from the host computer 200, the sheet feeding unit on the side of the sheet feeding cassette 6 as the first sheet feeding port or the manual feed tray (MP tray) 10 as the second sheet feeding port. The sheet feeding means on the side operates to feed a sheet, and the fed sheet P is introduced into the transfer nip portion T at a predetermined control timing and nipped and conveyed. While the sheet P is nipped and conveyed through the transfer nip portion T, transcription voltage is controlled to a predetermined from a transfer bias application power source (not shown) is applied to the transfer roller 5. The polarity of the transfer voltage is opposite to the charging polarity of the toner. As a result, the toner image on the photosensitive drum 1 is electrostatically transferred to the surface of the sheet P sequentially at the transfer nip T.

【0053】
そしてヒータ22を下面側に支持させ、円筒状定着フィルム24を外嵌させたステー23を加圧ローラ25の上側にヒータ22の部分を加圧ローラ24の上面に対向させて位置させ、ステー23を加圧手段にて加圧ローラ25の上面に対して所定の押圧力をもって圧接させた状態に保持させる。これにより、ヒータ22の下面と加圧ローラ25の上面との間に定着フィルム24を挟んで所定幅の定着ニップ部Nが形成される。
[0053]
Then, the heater 22 is supported on the lower surface side, and the stay 23 with the cylindrical fixing film 24 externally fitted is positioned above the pressure roller 25 with the portion of the heater 22 facing the upper surface of the pressure roller 24. It is held in a state of being pressed with a predetermined pressing force to the upper surface of the pressure roller 25 by pressure means. Thus, the fixing nip N having a predetermined width is formed between the lower surface of the heater 22 and the upper surface of the pressure roller 25 with the fixing film 24 interposed therebetween.

【0093】
いま、サブサーミスタsの温度があらかじめ決められた温度T2以上であることを検知した場合、制御手段19は、サブサーミスタsの温度がT1以上T2以下の所定の温度T3℃になるようにセラミックヒータ22を制御する(ステップS6)。
[0093]
Now, if the temperature of the sub thermistor s detects that it is a predetermined temperature T2 or higher, the control means 19, by Uni ceramic heater temperature of the sub thermistor s reaches a predetermined temperature T3 ° C. of T1 or higher T2 less 22 is controlled (step S6).

【0104】
また、実施例2乃至5においては、メインサーミスタjの温度低下に伴う定着不良(定着に必要な熱が確保されないためにトナーの固着が不十分である状態をいう)の画像が排出されるこを、極力押えることが可能であり、特に搬送方向の長い用紙が印字されているときは有効である。
[0104]
Further, in the second to fifth embodiments, an image of fixing failure due to the temperature decrease of the main thermistor j (in which the fixing of the toner is insufficient because the heat necessary for fixing is not secured) is discharged. preparative, it is possible to suppress as much as possible, is effective when it is particularly printed long sheet of conveying direction.

JP2000099080A 2000-03-31 2000-03-31 Image forming device Pending JP2001282039A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2000099080A JP2001282039A (en) 2000-03-31 2000-03-31 Image forming device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2000099080A JP2001282039A (en) 2000-03-31 2000-03-31 Image forming device

Publications (2)

Publication Number Publication Date
JP2001282039A JP2001282039A (en) 2001-10-12
JP2001282039A5 true JP2001282039A5 (en) 2005-03-17

Family

ID=18613477

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2000099080A Pending JP2001282039A (en) 2000-03-31 2000-03-31 Image forming device

Country Status (1)

Country Link
JP (1) JP2001282039A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4522138B2 (en) * 2004-05-07 2010-08-11 キヤノン株式会社 Heat fixing device
KR100544206B1 (en) * 2004-07-20 2006-01-23 삼성전자주식회사 Method and apparatus for preventing of overheating for a fixing unit
JP4677220B2 (en) * 2004-11-26 2011-04-27 キヤノン株式会社 Image heating apparatus and image forming apparatus
JP4574741B2 (en) * 2010-03-16 2010-11-04 キヤノン株式会社 Heat fixing device

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0580665A (en) * 1991-09-24 1993-04-02 Canon Inc Image heating device
JP2776101B2 (en) * 1991-11-13 1998-07-16 キヤノン株式会社 Heating equipment
JPH0580605A (en) * 1991-09-24 1993-04-02 Canon Inc Image heating device
JP3498271B2 (en) * 1995-05-16 2004-02-16 コニカミノルタホールディングス株式会社 Image recording apparatus with temperature controller for heat roller type fixing device

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