JPS6148880A - Unnecessary image erasing device of copying machine - Google Patents

Unnecessary image erasing device of copying machine

Info

Publication number
JPS6148880A
JPS6148880A JP59170458A JP17045884A JPS6148880A JP S6148880 A JPS6148880 A JP S6148880A JP 59170458 A JP59170458 A JP 59170458A JP 17045884 A JP17045884 A JP 17045884A JP S6148880 A JPS6148880 A JP S6148880A
Authority
JP
Japan
Prior art keywords
light emitting
image
image area
emitting means
unnecessary
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
JP59170458A
Other languages
Japanese (ja)
Other versions
JPH0155452B2 (en
Inventor
Akihiro Takatou
高藤　明尋
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.)
Fujifilm Business Innovation Corp
Original Assignee
Fuji Xerox 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 Fuji Xerox Co Ltd filed Critical Fuji Xerox Co Ltd
Priority to JP59170458A priority Critical patent/JPS6148880A/en
Publication of JPS6148880A publication Critical patent/JPS6148880A/en
Publication of JPH0155452B2 publication Critical patent/JPH0155452B2/ja
Granted 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
    • G03G15/04—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material
    • G03G15/045—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material with means for charging or discharging distinct portions of the charge pattern on the recording material, e.g. for contrast enhancement or discharging non-image areas
    • G03G15/047—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material with means for charging or discharging distinct portions of the charge pattern on the recording material, e.g. for contrast enhancement or discharging non-image areas for discharging non-image areas

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Discharging, Photosensitive Material Shape In Electrophotography (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)

Abstract

PURPOSE:To erase securely an unnecessary latent image forming a side image, etc., at the boundary part between an image area and a no-image area by turning on a fixed light emitting element partially according to copy magnification and the size of an original and erasing the latent image of the no-image area, and moving a moving light emitting means to a specific position. CONSTITUTION:When an original having length L and width W is reduced to M and copied, a control part calculates the width W.M of the image area delta on a photosensitive body 1 and outputs a movement signal to a pulse motor 12 for a corresponding time, and an LED indenter 8 moves to a specific position. Then, the control part outputs a light emission signal to a specific light emission block 7 of the fixed light emitting mean 2 and the LED indenter 8 for the time calculated from the length L.M of the image area delta and the moving speed of a photosensitive body 1, so that their light emission diodes 6 and 9 turn on. Consequently, the diode 6 turns on over a constant area S1 for the no-image area gamma to erase an unnecessary latent image, and the diode 9 turns on over the constant area S2 of the boundary part between the image area delta and no-image area gamma to erase an unnecessary latent image.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、原稿画像を自由な大きさに随時拡大縮小でき
る連続変倍機構を備えた複写機において、感光体上ζこ
形成さ八た潜像の不要部分を消去することのできる複写
機の不要像消去装置に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention is directed to a copying machine equipped with a continuous magnification mechanism that can enlarge or reduce an original image to any size at any time. The present invention relates to an unnecessary image erasing device for a copying machine that can erase unnecessary parts of latent images.

〔従来の技術〕[Conventional technology]

複写機の感光体上には、露光後原稿像に応じて潜像が形
成されているが、この潜像形成領域は、原稿の大きさに
よってその大きさがまちまちである。このため、コピ一
時に原稿外の不必要な画像がコピー用紙に形成されない
よう、コピーの際原稿サイズに合せてコピー用紙のサイ
ズを選択して使用し、これによって潜像形成領域と丁度
一致したコピー画像を得るようになっている。ところが
、変倍機能を有する複写機の場合、この変倍モード時に
、感光体上に形成される潜像領域が、原稿の大きさに縮
倍率をかけた大きさのものとなっているため、これに使
用するコピー用紙のサイズの選択を行う場合、予め各倍
率に対応した原稿サイズとコピー用紙のサイズとの関係
を正確に把握しておくか、或は計算から割り出さなけれ
ばならず、その作業が面倒である。A latent image is formed on the photoreceptor of a copying machine according to the original image after exposure, but the size of this latent image forming area varies depending on the size of the original. For this reason, in order to prevent unnecessary images outside the original from being formed on the copy paper during copying, the size of the copy paper is selected according to the original size when copying. You are now getting a copy image. However, in the case of a copying machine that has a variable magnification function, the latent image area formed on the photoreceptor during this variable magnification mode is the size of the document multiplied by the reduction factor. When selecting the size of the copy paper to be used for this, it is necessary to accurately understand the relationship between the original size and the copy paper size corresponding to each magnification in advance, or to determine it from calculations. The work is troublesome.

そこで例えば、第６図に示すような不要像消去装置が提
案されている。この不要像消去装置は、感光体（ａｌの
幅方向に沿ってその上方に発光ダイオード（ｂｌ等の発
光手段が固定して複敬個配設され、変倍モード時には、
内蔵されたマイクロプロセッサ等によって原稿サイズと
縮倍率とから原稿画像形成領域（以下、画像域（α）と
呼ぶ）の大きさが計算され、感光体ｆａｌ上の画像域（
α）以外の領域（以下、非画像域（β）と呼ぶ）上にあ
る発光ダイオード（ｂｌを点灯させてこの非画像域（／
１１）の潜像を消去させるように構成されており、上記
したような面倒な計算等からコピー用紙のサイズを選択
する必要がない。For example, an unnecessary image erasing device as shown in FIG. 6 has been proposed. This unnecessary image erasing device has light emitting means such as light emitting diodes (BL) fixedly disposed above the photoreceptor (al) along the width direction, and when in variable magnification mode,
A built-in microprocessor etc. calculates the size of the original image forming area (hereinafter referred to as image area (α)) from the original size and the reduction ratio, and calculates the size of the original image forming area (hereinafter referred to as image area (α)) on the photoconductor fal.
The light-emitting diode (bl) on the area other than α) (hereinafter referred to as non-image area (β)) is turned on and the non-image area (/
11) is configured to erase the latent image, and there is no need to select the size of the copy paper from the above-mentioned troublesome calculations.

このため、常に一定の大きさを有する大きめのコピー用
紙を用いて、各押具なるサイズの原稿からコピーをとっ
てもその原稿の輪郭（以下、ライン像と呼ぶ）等がコピ
ー用紙上に複写されることがなく、適正なコピー画像を
得ることができるようになっている。For this reason, even if a copy is made from an original of the size of each pusher using a large copy paper of a constant size, the outline of the original (hereinafter referred to as a line image) etc. will be copied onto the copy paper. This makes it possible to obtain a proper copy image without any problems.

〔発明が解決しようとする問題点〕 しかしながら、連続的な縮倍率でコピーをとることので
きる機能を備えた複写機の場合、上記のようなタイプの
不要像消去装置ではその縮倍率に一致させて潜像を消去
することができないことがある。これは、上記発光手段
となる発光ダイオード等が、たとえ最小サイズのもので
もその大きさは比較的大きなものであり、従ってこの最
小サイズ以下の精度では不要潜像の消去を行らことか不
可能となっているためである。このため、連続的な縮倍
率でコピーをとる場合、大雑把で粗い潜像消去となり、
画像域（α）と非画像域（７９）との境界部分の不要な
潜像（以下、不要潜像と呼ぶ）の消去洩れｔおこすこと
があり、例えばライン像等を発生させる微細な不要潜像
が感光体上に残留してそのまま現像されることがあり、
その結果コピー用紙上に黒のライン等が鮮明に再現され
ることがあり問題となっている。[Problem to be Solved by the Invention] However, in the case of a copying machine that is equipped with a function that can make copies at a continuous reduction ratio, the unnecessary image erasing device of the type described above cannot make copies that match the reduction ratio. It may not be possible to erase the latent image. This is because even if the light emitting diode, etc. that serves as the light emitting means is of a minimum size, it is relatively large, and therefore it is impossible to erase unnecessary latent images with precision below this minimum size. This is because. For this reason, when making copies at continuous reduction ratios, the latent image will be erased roughly and coarsely.
Failure to erase unnecessary latent images (hereinafter referred to as unnecessary latent images) at the boundary between the image area (α) and the non-image area (79) may occur; for example, fine unnecessary latent images that generate line images, etc. The image may remain on the photoconductor and be developed as is.
As a result, black lines and the like may be clearly reproduced on the copy paper, creating a problem.

〔問題点を解決するための手段及び作用〕即ち、本発明
は、連続変倍機構を備えると共に、感光体上の近傍には
その幅方向に沿って固定発光手段が備えられ、上記感光
体上の非画像域の潜像消去を行う連続変倍機構付複写機
の不要像消去装置において、上記感光体上の画像域と非
画像域との境界部分の不要潜像の消去を行う移動発光手
段と、倍率及び原稿の大きさに応じて上記移動発光手段
を始端位置から所定位置迄移動させ、かつこの所定位置
から始端位置迄戻す移動手段と、上記移動発光手段がそ
の始端位置に復帰したことを検知する検知手段とを備え
たものであり、連続的な倍率でコピーをとる場合、この
倍率と原稿の大きさに応じて上記固定発光手段が部分的
点灯して非画像域の潜像の消去を行うと共に、上記移動
手段が作動して上記移動発光手段を所定位置迄移動させ
、その位置で移動発光手段が点灯し、画像域と非画像域
との境界部分でサイド像等を形成する不要潜像を高精度
で、かつ確実に消去することができるものである。[Means and effects for solving the problem] That is, the present invention is provided with a continuous magnification change mechanism, and a fixed light emitting means is provided near the photoreceptor along the width direction of the photoreceptor. In an unnecessary image erasing device for a copying machine with a continuous magnification mechanism that erases a latent image in a non-image area, a movable light emitting device erases an unnecessary latent image in a boundary between an image area and a non-image area on the photoreceptor. and a moving means for moving the movable light-emitting means from a starting position to a predetermined position according to the magnification and the size of the document, and returning the movable light-emitting means from the predetermined position to the starting position, and returning the movable light-emitting means to its starting position. When making copies at continuous magnifications, the fixed light emitting means is partially illuminated depending on the magnifications and the size of the document to detect latent images in non-image areas. At the same time as erasing, the moving means operates to move the movable light emitting means to a predetermined position, the movable light emitting means lights up at that position, and a side image or the like is formed at the boundary between the image area and the non-image area. It is possible to erase unnecessary latent images with high precision and reliability.

〔′：Ａ施例〕[':A example]

以下、添付図面に示す実施例に基づいて本発明について
詳細に説明する。Hereinafter, the present invention will be described in detail based on embodiments shown in the accompanying drawings.

第１図及び第２図は、本発明に係る連続縮小機構付複写
機の不要像消去装置であり、この不要像消去装置は、感
光体（１）上の近傍にその幅方向に沿って非画像域の潜
像消去を行う固定発光手段（２）と、上記感光体（１）
上の画像域と非画像域との間の境界部分の不要潜像を消
去する移動発光手段（３）と、この移動発光手段（３）
を始端位置から所定位置迄往復移動させる移動手段（４
）と、上記移動発光手段（３）が始端位置に復帰したこ
とを検知する検知手段（５）と、倍率及び原稿の大きさ
に応じて固定発光手段（２）、移動発光手段（３）及び
移動手段（４）の作動を制御する制御部（１回路）とか
ら構成されている。1 and 2 show an unnecessary image erasing device for a copying machine with a continuous reduction mechanism according to the present invention. A fixed light emitting means (2) for erasing a latent image in an image area, and the photoreceptor (1)
A movable light emitting means (3) for erasing unnecessary latent images at the boundary between the upper image area and the non-image area; and the movable light emitting means (3).
A moving means (4) for reciprocating the
), a detection means (5) for detecting that the movable light emitting means (3) has returned to the starting position, a fixed light emitting means (2), a movable light emitting means (3) and It is composed of a control section (one circuit) that controls the operation of the moving means (4).

上記固定発光手段（２）は、上記制御部から出力される
発光信号により、発光ダイオード等の発光手段が部分的
に点灯して露光後の感光体（１）上の非画像域（ｒ）を
その真上から照明し、その光によって非画像域け）に形
成され現像後不要な画像等が再現される虞れのある不要
潜像を消去するものであり、本実施例の固定発光手段（
２）は、４個の発光ダイオード（６）から構成される発
光ブロック（７）が、図示外の基板上で、かつ、感光体
（１）幅方向に沿ってその上方に複数個取付けられた構
成となっている。また本実施例の固定発光手段（２）は
、上記制御部から出力された発光信号を一定時間入力し
た後、上記制御部から出力される調整信号を入力して全
発光ブロック（７）の発光ダイオード（６）が点灯し、
画像域（δ）等の後方の後方非画像域（ε）（第３図参
照）の不要潜像を消去するようになっている。In the fixed light emitting means (2), a light emitting means such as a light emitting diode is partially turned on in response to a light emitting signal output from the control section to illuminate a non-image area (r) on the exposed photoreceptor (1). The fixed light emitting means (of this embodiment) is used to erase unnecessary latent images that are formed in non-image areas (non-image areas) and may reproduce unnecessary images after development.
In 2), a plurality of light emitting blocks (7) each composed of four light emitting diodes (6) are mounted on a substrate (not shown) and above the photoreceptor (1) along the width direction. The structure is as follows. Further, the fixed light emitting means (2) of this embodiment inputs the light emission signal output from the control section for a certain period of time, and then inputs the adjustment signal output from the control section to cause all the light emission blocks (7) to emit light. Diode (6) lights up,
Unnecessary latent images in the rear non-image area (ε) (see FIG. 3) behind the image area (δ) etc. are erased.

上記移動発光手段（３）は、上記制御部の発光信号を入
力し、画像域（δ）と非画像域（γ）との間の境界部分
において画像域（δ）外の潜像を高精度で消去し上記固
定発光手段（２）による不要潜像の微調整を図るもので
あり、本実施例においてこの移動発光手段（３）は固定
発光手段（２）の近傍に、感光体（１）の幅方向に沿っ
て設けられたＬＥＤアツシ（８）から構成されている。The mobile light emitting means (3) inputs the light emission signal from the control unit and generates a latent image outside the image area (δ) with high precision at the boundary between the image area (δ) and the non-image area (γ). The movable light emitting means (3) in this embodiment has a photoreceptor (1) in the vicinity of the fixed light emitting means (2). It consists of an LED assembly (8) provided along the width direction.

尚、このＬＥＤアツシ（８）は、本実施例の場合、５個
の発光ダイオード（９）を直列に接続して基板（回路）
上に取付けたものであるが、この場合上記発光ダイオー
ド（９）はできるだけ小さなサイズのものを取付けるの
が望ましい。In this embodiment, this LED assembly (8) is a board (circuit) made by connecting five light emitting diodes (9) in series.
In this case, it is desirable that the light emitting diode (9) be as small as possible.

上記移動手段（４）は、本実施例において、感光体（１
）の幅方向に沿って一対張架され、その一部に上記ＬＥ
Ｄアツシ（８）を固定して取付けたベルト（１０１と、
このベルトｎｏｔの両端側でそのヘルドの係合孔（１０
ａ）と係合する回転可能なスプロケツＨ１ｌと、このス
プロケットａＤの回転軸と接続され、上記制御部からの
移動信号によって正逆回転するパルスモータｕｚとから
構成されている。そしてこのパルスモータ叩が上記制御
部からの移動信号を入力すると、第３図においてこのパ
ルスモータｕｚが所定時間（ｔｌ）作動し、上記移動発
光手段（３）の出発点となる位置（以下、始端位置（Ｉ
ｌと呼ぶ）（第４図参照）から画像域（δ）と非画像域
（ｒ）との間の境界部分に向けて移動発光手段（３）の
ＬＥＤアツシ（８）を移動させ、画像域（δ）と非画像
域（γ）との境界部分に先端側の発光ダイオード（９ａ
）が到達した位１ｔ（Ｆ）　（第４図参照）で停止させ
るように構成されている。また、上記発光ダイオード（
９ａ）を含む移動ＬＥＤアツシ（８）が所定時間（ｔｌ
）点灯後、上記制御部からの調整信号によって上記パル
スモータａ２１が逆回転し、上記ＬＥＤアツシ（８）を
再び始端位置ｆＩＪ迄戻して待機させ次の点灯動作に備
えるようになっている。In this embodiment, the moving means (4) is the photoreceptor (1).
) are stretched along the width direction, and part of them is covered with the above LE.
The belt (101 and
The engagement holes (10
It is composed of a rotatable sprocket H1l that engages with the sprocket a), and a pulse motor uz that is connected to the rotating shaft of the sprocket aD and rotates forward and backward in response to a movement signal from the control section. When this pulse motor hit inputs a movement signal from the control section, this pulse motor uz operates for a predetermined time (tl) in FIG. Starting position (I
1) (see Figure 4) toward the boundary between the image area (δ) and the non-image area (r). (δ) and the non-image area (γ), there is a light emitting diode (9a) on the tip side.
) is configured to stop at 1t(F) (see Fig. 4). In addition, the above light emitting diode (
The moving LED assembly (8) including
) After lighting, the pulse motor a21 is reversely rotated by an adjustment signal from the control section, and the LED assembly (8) is returned to the starting end position fIJ and placed on standby in preparation for the next lighting operation.

上記検知手段（５）は、上記移動発光手段（３）が所定
位置迄移動した後、次の点灯動作に備えその移動発光手
段（３）を正確に始端位置（ＩＩに戻し、そこで待機さ
せておくため、上記移動発光手段（３）が始端位置（Ｉ
）に復帰したかどうかを検知するものである。After the movable light emitting means (3) has moved to a predetermined position, the detecting means (5) accurately returns the movable light emitting means (3) to the starting position (II) in preparation for the next lighting operation, and waits there. In order to keep the moving light emitting means (3) at the starting end position (I
) to detect whether the state has returned to normal.

本実施例においては、移動発光手段（３）の基板側面側
に設けられた発光ダイオード等からなる発光部（１３）
と、上記ＬＦＪＤアツシ（８）が始端位置（ＩＩに到達
したときに、このＬＥＤアツシ（８）からの光を受光し
停止信号を制御部に出力するため、感光体（１）の所定
位置に正確に位置決めして設けられたフォトダイオード
等からなる受光部側とから構成されている。そしてこの
受光部側が上記発光部（１３）からの光を受光すると停
止信号を出力し、この停止信号を入力した上記制御部は
、上記調整信号の出力を停止する。In this embodiment, a light emitting section (13) consisting of a light emitting diode or the like is provided on the side surface of the substrate of the mobile light emitting means (3).
When the LFJD assembly (8) reaches the starting position (II), the LED assembly (8) is placed at a predetermined position on the photoreceptor (1) in order to receive light from the LED assembly (8) and output a stop signal to the control unit. It consists of a light-receiving section side consisting of a photodiode, etc. arranged in an accurately positioned manner.When this light-receiving section side receives light from the light-emitting section (13), it outputs a stop signal. The control unit having received the input stops outputting the adjustment signal.

上記制御部は、連続縮小モード時にこの倍率と原稿の大
きさとから画像域（δ）の大きさを計算し、これに応じ
て移動信号を移動手段（４）のパルスモータＱ２）に一
定時間（ｔｌ）出力し、この後直ちに発光信号を固定発
光手段（２）そして移動発光手段（３）Ｉこ一定時間（
ｔｌ）出力し、さらにその後直ちに調整信号を固定発光
手段（２）そして移動手段（４）に出力するものであり
、その後（ｔ３）時間経過後、この制御部が上記検知手
段（５）からの停止信号を入力すると、直ちに上記調整
信号の出力を停止するように構成されている。The control section calculates the size of the image area (δ) from this magnification and the size of the document in the continuous reduction mode, and accordingly sends a movement signal to the pulse motor Q2) of the movement means (4) for a certain period of time ( tl), and then immediately sends a light emission signal to the fixed light emitting means (2) and the mobile light emitting means (3) for a certain period of time (
tl), and then immediately outputs an adjustment signal to the fixed light emitting means (2) and the moving means (4), and after the elapse of time (t3), this control section outputs the adjustment signal from the detection means (5). When the stop signal is input, the output of the adjustment signal is immediately stopped.

尚本実施例の不要像消去装置においては、図示外の原稿
がプラテンガラス（回路）上のコーナ部に位置決めされ
て載置されたコーナレジスト方式が採用されているが、
これ以外にも、例えばＬＥＤアツシな２個設け、互いに
これを移動させることによってセンタレジスト方式によ
るものでも勿論可能である。また本実施例の不要像消去
装置を備えた複写機には連続縮小機能が備えつけられて
いるが、これに限定されるものではなく、連続拡大機能
を備えた複写機にも勿論適用することが可能である。The unnecessary image erasing device of this embodiment employs a corner registration method in which a document (not shown) is positioned and placed at a corner portion of the platen glass (circuit).
In addition to this, it is of course possible to use a center registration method by, for example, providing two strong LEDs and moving them relative to each other. Furthermore, although the copying machine equipped with the unnecessary image erasing device of this embodiment is equipped with a continuous reduction function, it is not limited to this, and of course can also be applied to a copying machine equipped with a continuous enlargement function. It is possible.

従って上記実施例によれば、連続縮小モードを設定し、
例えば長さ及び幅が夫々Ｌ及びＷを有する原石′１．１
をＭ倍に縮小してコピーをとる場合、第３図に示すよう
に上記制御部が原稿幅と倍率とから感光体（１）−ヒの
画像域（δ）の幅（Ｗ、Ｍ）を計算し、これに応じた時
間だけ移動信号を移動手段（４）のパルスモータ０りに
出力し、ＬＥＤアツシ（８１’ｈｓ所定位置迄移動する
。そして、この後直ちに上記制御部が原稿長さ及び倍率
から計算されていた画像域（δ）の長さくＬ−Ｍ）及び
感光体（１）の移動速度から割出された時間だけ発光信
号を固定発光手段（２）の特定発光ブロック（７）及び
ＬＥＤアツシ（８）に出力し、これらの発光ダイオード
＋６１、＋９１が点灯する。これによって第５図に示す
ように、上記固定発光手段（２）の発光ダイオード（６
）が非画像域（γ）に対して一定領域（Ｓｌ）に亘って
点灯し不要潜像の消去を行うほか、上記移動発光手段（
３）の発光ダイオード（９）によって画像域（δ）と非
画像域け）との境界部分の一定領域（Ｓｌ）に亘って点
灯し、不要潜像を高精度で、かつ確実に消去し、その部
分での不要潜像消去の微調整を図ることができる。そし
て、その直後、上記制御部からの調整信号が固定発光手
段（２）の全発光ブロック（７）及び移動手段（４）の
パルスモータ（１２１ｉこ出力され、これによって発光
ブロック（７）の発光ダイオード（６）が全て点灯して
後方画像域（ε）の潜像の消去を行うと共に、パルスモ
ータ（１２＋の逆回転によってＬＥＤアツシ（８）が始
端位置（Ｉ）まで戻り、次の非画像域の潜像消去に備え
てそこで待機する。Therefore, according to the above embodiment, the continuous reduction mode is set,
For example, raw stone '1.1 with length and width L and W, respectively.
When making a copy by reducing the size by M times, the control section calculates the width (W, M) of the image area (δ) of photoreceptor (1)-H from the original width and magnification, as shown in Figure 3. A movement signal is output to the pulse motor of the movement means (4) for a time corresponding to this calculation, and the LED is moved to a predetermined position (81'hs). Immediately after this, the control section changes the document length. A specific light emitting block (7) of the light emitting means (2) is fixed to emit a light emitting signal for a time calculated from the length of the image area (δ) calculated from the magnification (LM) and the moving speed of the photoreceptor (1). ) and LED assembly (8), and these light emitting diodes +61 and +91 light up. As a result, as shown in FIG. 5, the light emitting diode (6) of the fixed light emitting means (2)
) lights up over a certain area (Sl) relative to the non-image area (γ) to erase unnecessary latent images, and the movable light emitting means (
3) The light-emitting diode (9) illuminates a certain area (Sl) at the boundary between the image area (δ) and the non-image area, and erases unnecessary latent images with high precision and reliably. It is possible to fine-tune unnecessary latent image erasure in that area. Immediately thereafter, the adjustment signal from the control section is output to all the light emitting blocks (7) of the fixed light emitting means (2) and the pulse motor (121i) of the moving means (4), thereby causing the light emitting block (7) to emit light. All the diodes (6) are turned on and the latent image in the rear image area (ε) is erased, and the pulse motor (12+) is rotated in the reverse direction to return the LED assembly (8) to the starting position (I) and the next non-image area is erased. Wait there in preparation for erasing the latent image in the area.

このようにして、非画像域（ｒｌの大きさが自由に変化
しても、この大きさに正確に一致させて、非画像域（ｒ
ｌ内の潜像を確実に消去することができるため、一定サ
イズのコピー用紙を使用し原稿の大ことがない。In this way, even if the size of the non-image area (rl) changes freely, it can be made to exactly match this size and the non-image area (r
Since the latent image within the image can be reliably erased, copy paper of a fixed size can be used and the document size does not have to be large.

〔発明の効果〕〔Effect of the invention〕

以上述べてきたように、本発明を用いると連続変倍モー
ドでコピ一時に、これに使用するコピー用紙が画像域よ
りも大きめのものであっても、このコピー用紙上にはラ
イン像等の不要な画像が再現される虞れがなく、常に適
正なコピー画像を得ることができるため、商品価値の高
いコピー用紙を提供することができその効果はきわめて
大である。As described above, when using the present invention, even if the copy paper used for copying in continuous magnification mode is larger than the image area, line images, etc. will remain on the copy paper. Since there is no risk of unnecessary images being reproduced and a proper copy image can always be obtained, it is possible to provide copy paper with high commercial value, which is extremely effective.

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

第１図及び第２図は本発明に係る複写機の不要像消去装
置を示すものであり、第１図は移動発光手段が始端位置
に停止した場合の概略平面図、第２図は概略的正面図、
第３図は感光体上の画像領域等を示す説明図、第４図は
第１図において移動発光手段が移動した場合を示す概略
平面図、第５図は感光体上の不要潜像上で点灯する固定
発光手段及び移動発光手段の発光タイオードを説明する
説明図、第６図は従来の複写機の不要像消去装置を示す
概略的正面図である。 〔符号説明〕 （１）・・・・・・感光体　　　　　（２）・・・・・
・固定発光手段（３）・・・・・・移動発光手段　　（
４）・・・・・・移動手段（５）・・・・・・検知手段
　　　（６１＋９１・・・・・・発光ダイオード（７）
・・・・・・発光ブロック　　（８）・・・・・・ＬＥ
Ｄアツシ（１２１・・・・・・）１°ルスモータ（α）
（δ）・・・・・・画像域　　　　（βバγ）・・・・
・・非画像域（ε）・・・・・・後方画像域1 and 2 show an unnecessary image erasing device for a copying machine according to the present invention, FIG. 1 is a schematic plan view when the movable light emitting means is stopped at the starting position, and FIG. 2 is a schematic plan view. Front view,
Fig. 3 is an explanatory diagram showing the image area etc. on the photoreceptor, Fig. 4 is a schematic plan view showing the case where the movable light emitting means moves in Fig. 1, and Fig. 5 is an explanatory diagram showing the image area etc. on the photoreceptor. FIG. 6 is a schematic front view showing a conventional unnecessary image erasing device for a copying machine. [Explanation of symbols] (1)...Photoreceptor (2)...
・Fixed light emitting means (3)...Moving light emitting means (
4)...Moving means (5)...Detecting means (61+91...Light emitting diode (7)
......Light-emitting block (8)...LE
D thickness (121...) 1° Luss motor (α)
(δ)...Image area (βbaγ)...
...Non-image area (ε)...Backward image area

Claims (1)

【特許請求の範囲】[Claims] 連続変倍機構を備え、かつ感光体の近傍にはその幅方向
に沿つて固定発光手段が備えられ、上記感光体上の非画
像域の潜像消去を行う連続変倍機構付複写機の不要像消
去装置において、上記感光体上の画像域と非画像域との
境界部分の不要潜像の消去を行う移動発光手段と、倍率
及び原稿の大きさに応じて上記移動発光手段を始端位置
から所定位置迄移動させ、かつ、この所定位置から始端
位置迄戻す移動手段と、上記移動発光手段がその始端位
置に復帰したことを検知する検知手段とを備えたことを
特徴とする複写機の不要像消去装置。A copying machine equipped with a continuous variable magnification mechanism and a fixed light emitting means near the photoconductor along its width direction eliminates the need for a copying machine with a continuous variable magnification mechanism that erases latent images in non-image areas on the photoconductor. The image erasing device includes a movable light emitting means for erasing an unnecessary latent image at the boundary between an image area and a non-image area on the photoreceptor, and a movable light emitting means for erasing an unnecessary latent image at a boundary between an image area and a non-image area on the photoconductor, and a movable light emitting means for erasing an unnecessary latent image from a starting position according to the magnification and the size of the document. No need for a copying machine, characterized in that it is provided with a moving means for moving to a predetermined position and returning from the predetermined position to a starting position, and a detecting means for detecting that the movable light emitting means has returned to its starting position. Image erasing device.
JP59170458A 1984-08-17 1984-08-17 Unnecessary image erasing device of copying machine Granted JPS6148880A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59170458A JPS6148880A (en) 1984-08-17 1984-08-17 Unnecessary image erasing device of copying machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59170458A JPS6148880A (en) 1984-08-17 1984-08-17 Unnecessary image erasing device of copying machine

Publications (2)

Publication Number Publication Date
JPS6148880A true JPS6148880A (en) 1986-03-10
JPH0155452B2 JPH0155452B2 (en) 1989-11-24

Family

ID=15905309

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59170458A Granted JPS6148880A (en) 1984-08-17 1984-08-17 Unnecessary image erasing device of copying machine

Country Status (1)

Country Link
JP (1) JPS6148880A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02303014A (en) * 1989-05-17 1990-12-17 Nichicon Corp Manufacture of dc capacitor of vapor-deposited electrode type having built-in potential-dividing resistor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02303014A (en) * 1989-05-17 1990-12-17 Nichicon Corp Manufacture of dc capacitor of vapor-deposited electrode type having built-in potential-dividing resistor

Also Published As

Publication number Publication date
JPH0155452B2 (en) 1989-11-24

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