JPS6429647U - - Google Patents

Info

Publication number
JPS6429647U
JPS6429647U JP12411287U JP12411287U JPS6429647U JP S6429647 U JPS6429647 U JP S6429647U JP 12411287 U JP12411287 U JP 12411287U JP 12411287 U JP12411287 U JP 12411287U JP S6429647 U JPS6429647 U JP S6429647U
Authority
JP
Japan
Prior art keywords
trailing edge
sheet
adhesion prevention
edge detection
detection means
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
JP12411287U
Other languages
Japanese (ja)
Other versions
JP2522061Y2 (en
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 filed Critical
Priority to JP1987124112U priority Critical patent/JP2522061Y2/en
Publication of JPS6429647U publication Critical patent/JPS6429647U/ja
Application granted granted Critical
Publication of JP2522061Y2 publication Critical patent/JP2522061Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Exposure Or Original Feeding In Electrophotography (AREA)
  • Counters In Electrophotography And Two-Sided Copying (AREA)

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本考案の一実施例に係る両面画像形成
装置の要部を説明するための概念図、第２図は上
記両面画像形成成装置を用いて用紙後端に帯状白
抜領域を形成させるための処理手順を説明するフ
ローチヤートである。 符号の説明、１…レジストローラ、２…感光ド
ラム、３…ブランクランプ（トナー付着防止手段
）、４…転写チヤージヤ、５…転写部、Ｅ…帯状
白抜領域、Ｐ…コピー用紙、ＳＷ１…スイツチ（
後端検出手段）。 FIG. 1 is a conceptual diagram for explaining the main parts of a double-sided image forming apparatus according to an embodiment of the present invention, and FIG. 2 is a conceptual diagram for explaining the main parts of a double-sided image forming apparatus according to an embodiment of the present invention. FIG. 2 is a flowchart illustrating the processing procedure for Explanation of symbols, 1... Registration roller, 2... Photosensitive drum, 3... Blank lamp (toner adhesion prevention means), 4... Transfer charger, 5... Transfer section, E... Band-shaped white area, P... Copy paper, SW 1 ... Switch (
trailing edge detection means).

Claims (1)

【実用新案登録請求の範囲】 １ 搬送される用紙の後端位置を検出する後端検
出手段と、 用紙の搬送方向に所定距離分だけトナーの付着
を防止するトナー付着防止手段と、 第１面目への画像形成処理時に、上記後端検出
手段からの信号に応じて上記トナー付着防止手段
を作動させ、用紙の後端に沿つた帯状白抜領域を
形成させる制御手段とを備えてなることを特徴と
する両面画像形成装置。 ２ 後端検出手段をレジストローラより用紙搬送
方向上流側に設けたスイツチとし、トナー付着防
止手段をブランクランプとし、更に、用紙搬送経
路に沿つて測つた転写部から上記スイツチまでの
距離と、感光ドラム外周に沿つて測つた転写部か
らブランクランプ照射中心までの距離との差を前
記帯状白抜領域の幅に設定した実用新案登録請求
の範囲第１項に記載した両面画像形成装置。[Scope of Claim for Utility Model Registration] 1. Trailing edge detection means for detecting the position of the trailing edge of a sheet of paper being conveyed; Toner adhesion prevention means that prevents toner from adhering by a predetermined distance in the conveying direction of the sheet; and the first side. control means for activating the toner adhesion prevention means in response to a signal from the trailing edge detection means to form a band-shaped white area along the trailing edge of the paper during image formation processing on the sheet; Features of a double-sided image forming device. 2. The trailing edge detection means is a switch provided upstream of the registration roller in the paper transport direction, the toner adhesion prevention means is a blank lamp, and the distance from the transfer section to the switch measured along the paper transport path and the photosensitive The double-sided image forming apparatus according to claim 1, wherein the width of the band-shaped blank area is set to the difference between the distance from the transfer section to the blank lamp irradiation center measured along the outer circumference of the drum.
JP1987124112U 1987-08-12 1987-08-12 Double-sided image forming device Expired - Lifetime JP2522061Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1987124112U JP2522061Y2 (en) 1987-08-12 1987-08-12 Double-sided image forming device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1987124112U JP2522061Y2 (en) 1987-08-12 1987-08-12 Double-sided image forming device

Publications (2)

Publication Number Publication Date
JPS6429647U true JPS6429647U (en) 1989-02-22
JP2522061Y2 JP2522061Y2 (en) 1997-01-08

Family

ID=31373562

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1987124112U Expired - Lifetime JP2522061Y2 (en) 1987-08-12 1987-08-12 Double-sided image forming device

Country Status (1)

Country Link
JP (1) JP2522061Y2 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57180357U (en) * 1981-05-12 1982-11-16
JPS5880662A (en) * 1981-11-09 1983-05-14 Ricoh Co Ltd Rear end erase control method of electrostatic copying machine
JPS59160159A (en) * 1983-03-04 1984-09-10 Konishiroku Photo Ind Co Ltd Electrostatic recorder
JPS61278882A (en) * 1985-06-04 1986-12-09 Canon Inc Both side image forming device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57180357U (en) * 1981-05-12 1982-11-16
JPS5880662A (en) * 1981-11-09 1983-05-14 Ricoh Co Ltd Rear end erase control method of electrostatic copying machine
JPS59160159A (en) * 1983-03-04 1984-09-10 Konishiroku Photo Ind Co Ltd Electrostatic recorder
JPS61278882A (en) * 1985-06-04 1986-12-09 Canon Inc Both side image forming device

Also Published As

Publication number Publication date
JP2522061Y2 (en) 1997-01-08

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