JPS58125065A - Variable power copying device - Google Patents

Variable power copying device

Info

Publication number
JPS58125065A
JPS58125065A JP710882A JP710882A JPS58125065A JP S58125065 A JPS58125065 A JP S58125065A JP 710882 A JP710882 A JP 710882A JP 710882 A JP710882 A JP 710882A JP S58125065 A JPS58125065 A JP S58125065A
Authority
JP
Japan
Prior art keywords
scanning
signal
copy
copying
optical scanning
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
JP710882A
Other languages
Japanese (ja)
Inventor
Koji Sakaguchi
阪口 耕司
Kazuo Shimoda
下田 収穂
Koji Fukazawa
孝二 深沢
Noriki Tachibana
範幾 立花
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.)
Konica Minolta Inc
Original Assignee
Konica Minolta Inc
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 Konica Minolta Inc filed Critical Konica Minolta Inc
Priority to JP710882A priority Critical patent/JPS58125065A/en
Publication of JPS58125065A publication Critical patent/JPS58125065A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00Apparatus for electrographic processes using a charge pattern
    • G03G15/65Apparatus which relate to the handling of copy material
    • G03G15/6555Handling of sheet copy material taking place in a specific part of the copy material feeding path
    • G03G15/6558Feeding path after the copy sheet preparation and up to the transfer point, e.g. registering; Deskewing; Correct timing of sheet feeding to the transfer point
    • G03G15/6561Feeding path after the copy sheet preparation and up to the transfer point, e.g. registering; Deskewing; Correct timing of sheet feeding to the transfer point for sheet registration
    • G03G15/6564Feeding path after the copy sheet preparation and up to the transfer point, e.g. registering; Deskewing; Correct timing of sheet feeding to the transfer point for sheet registration with correct timing of sheet feeding
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00Apparatus for electrophotographic processes
    • G03G2215/00362Apparatus for electrophotographic processes relating to the copy medium handling
    • G03G2215/00367The feeding path segment where particular handling of the copy medium occurs, segments being adjacent and non-overlapping. Each segment is identified by the most downstream point in the segment, so that for instance the segment labelled "Fixing device" is referring to the path between the "Transfer device" and the "Fixing device"
    • G03G2215/00405Registration device
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00Apparatus for electrophotographic processes
    • G03G2215/00362Apparatus for electrophotographic processes relating to the copy medium handling
    • G03G2215/00535Stable handling of copy medium
    • G03G2215/00556Control of copy medium feeding

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optical Systems Of Projection Type Copiers (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)
  • Variable Magnification In Projection-Type Copying Machines (AREA)

Abstract

PURPOSE:To allow the leading edge of an original and that of a copy paper to coincide with each other precisely, by constituting the device so that a copy material, which has the leading edge positioned preliminarily in a prescribed position and is held, is carried to the next process stage in a constant speed by a timing signal. CONSTITUTION:When the copy material is stopped in a certain holding position or is fed again (started to be carried), a slight delay is generated by various causes such as the mass, the moment, the signal delay, and friction of the rotating system. When the delay time is denoted as T2, a delay time T to be set is obtained by an equation T=T1-T2. Consequently, a signal is generated when an optical scanning means scans for a length l1 from the leading edge of the original, and carrying of the copy material which has the leading edge positioned at a point D set preliminarily by said method and is held is started on the basis of this signal, and thus, leading edges of the copy material and a copy image coincide with each other.

Description

【発明の詳細な説明】 本発明は可変倍複写装置に関するものである。[Detailed description of the invention] The present invention relates to a variable magnification copying apparatus.

従来、光学走査手段の走査速度を適宜変化させ、スリッ
ト露光方式で複写を行なう可変倍複写機が知られている
。この種の可変倍複写機において2種類以上の複写倍率
を得るには、複写材を定速に保持しながら光学走査手段
の速度を変化させることが通常行なわれる。この場合、
感光体の帯電、現像処理をはじめとする諸工程や、光学
系以外のすべての駆動、搬送部の操作条件に等倍複写と
金く同一であってよく、変倍複写を容易に行なえる。
2. Description of the Related Art Conventionally, variable magnification copying machines have been known that perform copying using a slit exposure method by appropriately changing the scanning speed of an optical scanning means. In order to obtain two or more types of copying magnification in this type of variable magnification copying machine, the speed of the optical scanning means is usually varied while the copying material is held at a constant speed. in this case,
The various processes such as charging and developing the photoreceptor, all driving conditions other than the optical system, and the operating conditions of the conveying section may be the same as those for full-size copying, and variable-magnification copying can be easily performed.

光学系による被複写体、例えば原稿の走査に際し、固定
載置台上の静止原稿に対して光源及びミラー等を移動さ
せるようにした光学系移動方式と、光学系を固定して原
稿載置台を移動させる方式とがある。本発明における「
光学走査手段」とは、上記の光学系又は原稿載置台を移
動させるいずれの走査方式をも包含するものである。
When an optical system scans an object to be copied, such as a document, there is an optical system movement method in which the light source, mirror, etc. are moved relative to the stationary document on a fixed table, and the other is a method in which the optical system is fixed and the document table is moved. There is a method to do this. In the present invention, “
The term "optical scanning means" includes any of the above-mentioned optical systems or scanning methods that move the original table.

光学走査手段においては、少なくとも、原稿を走査して
スリット状に露光する間は走査系を定速で移動させる必
要がある。このために、走査手段は、原稿の走査開始端
を露光するまでに定速移動状態となり、しかも露光用の
光源が定常状態に達するように、原稿の始端位置に至る
迄の間には適当な助走区間が設けられる。この区間を過
ぎると、定速度の置載(即ち、画像露光のための区間)
に入ることになる。
In the optical scanning means, it is necessary to move the scanning system at a constant speed at least while scanning the original and exposing it in the form of a slit. For this purpose, the scanning means is in a constant speed movement state by the time it exposes the scanning start edge of the document, and also moves at an appropriate speed until it reaches the starting edge position of the document so that the light source for exposure reaches a steady state. A run-up section will be provided. After this section, constant speed loading (i.e., section for image exposure)
will enter.

こうした方式によって可変倍複写を行なうには、複写材
(コピー紙)の移動速度をVとすれば、N倍率で複写す
るときの走査手段の移動速度はV/N(3) (等倍複写のときにはV)となり、走査手段が上記助走
区間を走査するのに要する時間は等倍複写の場合とは異
なってくる。従って、光学走査手段の速度のみを変化さ
せ、他の条件を等倍複写時と全く同一にして複写すると
、コピー紙上の複写像は原稿の後端(終端)側について
複写されないことがある。加えて、原稿の始端位置に至
る迄に多くの非複写域が生じてしまう。
To perform variable-magnification copying using this method, if the moving speed of the copying material (copy paper) is V, the moving speed of the scanning means when copying at N magnification is V/N (3) (for full-size copying) V), and the time required for the scanning means to scan the run-up section differs from that in the case of full-size copying. Therefore, when copying is performed by changing only the speed of the optical scanning means and keeping other conditions exactly the same as when copying at full size, the copied image on the copy paper may not be copied at the trailing edge (terminus) of the original. In addition, many non-copy areas are generated up to the starting edge position of the document.

この問題点を是正し、可変倍複写時の倍率切換えによる
原稿−コピー紙間の位置ずれをなくすには、次の幾つか
の対策が考えられる。即ち、一定の運動を行なうコピー
紙に対して光学走査手段の走査開始のタイミングを各倍
率に応じて変化させる方法、同コピー紙に対して光学走
査手段の助走距離を各倍率毎に変化させる方法、コピー
紙の位置検出後に光学走査手段の走査を開始する方法、
原稿載置台上の原稿の位置を各倍率毎に変える方1 法、光学走査手段が原稿の始端を走査した時点でコピー
紙の定速移動を開始し、それまでは所定位置にコピー紙
を待機させておく方法が夫々前えら(4) れる。
In order to correct this problem and eliminate the positional deviation between the original document and the copy paper due to the change in magnification during variable magnification copying, the following several measures can be considered. That is, a method in which the scanning start timing of the optical scanning means is changed for each magnification with respect to a copy paper that performs a constant movement, and a method in which the approach distance of the optical scanning means is changed for each magnification with respect to the same copy paper. , a method for starting scanning of an optical scanning means after detecting the position of copy paper;
Method 1: Changing the position of the original on the original table for each magnification Method 1: When the optical scanning means scans the starting edge of the original, the copy paper starts moving at a constant speed, and until then, the copy paper is kept in a predetermined position. There are various ways to keep it in place (4).

しかしながら、それらの方法では、光学走査手段を制御
する上で各倍率に応じた個数のタイマー等が必要であり
、しかもこれらをその都度調整しなければならないとか
、或いは光学走査手段は一定の重量を有するために駆動
後に定速移動する捷でに立上シ時間を要したり、モータ
ー等の駆動方式の場合には電源電圧の変動、温度、使用
頻度等によって、マグネット・クラッチ方式では電源電
圧の変動及び使用頻度によって上記した立−ヒり時間が
変化するという欠点がある。更に、光学走査手段の元の
位置を保持し、助走距離を各走査毎に変動するのを防ぐ
手段が必要であシ、また倍率切換え毎に光学走査手段の
走査開始までに同走査手段を予め決められた位置へ駆動
するだめの複雑な機構が必要である。また、装置を取扱
う者が各倍率に応じて原稿の載置位置をその都度変える
場合には、操作が複雑化シフ、或いは誤操作を招く恐れ
が多分にある。
However, in these methods, in order to control the optical scanning means, a number of timers etc. corresponding to each magnification are required, and these must be adjusted each time, or the optical scanning means has a certain weight. In the case of a drive system such as a motor, the power supply voltage may vary depending on fluctuations in power supply voltage, temperature, frequency of use, etc. in the case of a drive system such as a motor. There is a drawback that the stand-up time mentioned above changes depending on fluctuations and frequency of use. Furthermore, it is necessary to have a means to maintain the original position of the optical scanning means and prevent the approach distance from changing for each scan, and also to prevent the optical scanning means from changing its original position every time the magnification is changed. A complex mechanism is required to drive it to a determined position. In addition, if the person operating the apparatus changes the placement position of the document each time according to each magnification, there is a high possibility that the operation will become complicated or that an erroneous operation will occur.

−F記した方法のうち、待機させたコピー紙を原稿の始
端走査と同時に定速移動させる方法については特に、原
稿始端での光学走査手段の位置検出が難しく、シかもコ
ピー紙の停止位置や、原稿始端での位置検出信号を受け
て作動を開始するローラー等の搬送手段の立上りが必ず
しも一定ではない。感光体上の露光位置から転写位置ま
での距離とコピー紙の停止位置から転写位置までの距離
とを等しくとれば、原稿始端とコピー紙の前端とを一致
させることは原理的には可能であるが、上記した理由に
よってそれらを厳密に一致させることは困難である。こ
のため、原稿始端とコピー紙前端とを精密に一致させる
別の手段が必要となる。
- Of the methods described in F, the method of moving the waiting copy paper at a constant speed at the same time as scanning the starting edge of the original is particularly difficult because it is difficult to detect the position of the optical scanning means at the starting edge of the original. , the rise of a conveying means such as a roller that starts operating upon receiving a position detection signal at the starting edge of a document is not necessarily constant. If the distance from the exposure position on the photoreceptor to the transfer position is equal to the distance from the stop position of the copy paper to the transfer position, it is theoretically possible to align the starting edge of the original with the leading edge of the copy paper. However, for the reasons mentioned above, it is difficult to make them exactly match. Therefore, another means is required to precisely match the starting edge of the original and the leading edge of the copy paper.

これに加えて、部品精度、機械精度、組立て精度の関係
で、出来上ったものを再調整しなければ々らないという
欠点がある。
In addition to this, there is a drawback in that the finished product must be readjusted due to component accuracy, machine accuracy, and assembly accuracy.

本発明者は、上述した如き状況を考慮し、複写材(コピ
ー紙)の定速移動下で光学走査手段をいかなる速度で移
動させても、原稿の始端(走査開始端)の位置及び光学
走査手段の助走距離等を変えることなく、組立て時の簡
単々調整を行なうことによって、上述したすべての問題
点をことごとく解消できる可変倍複写装置を見出し、本
発明に到達したものである。
Taking the above-mentioned situation into consideration, the present inventor has proposed that the position of the starting edge (scanning start edge) of the document and the optical scanning can be adjusted even if the optical scanning means is moved at any speed while the copying material (copy paper) is moving at a constant speed. The present invention has been achieved by discovering a variable magnification copying apparatus that can completely eliminate all of the above-mentioned problems by making simple adjustments during assembly without changing the run-up distance of the means.

即ち、本発明による可変倍複写装置は、少なくとも2種
類の走査速度を任意に選択できる光学走査手段と、この
光学走査手段の定速移動中に所定の信号を発生し、この
信号に基いて走査速度に応じたタイミング信号を発生す
る手段とを夫々有し、所定位置に予め前端が位置合せさ
れて待機せしめうしている複写材を前記タイミング信号
によって次の工程段階へ定速で搬送開始するように構成
されたことを特徴とするものである。
That is, the variable magnification copying apparatus according to the present invention includes an optical scanning means that can arbitrarily select at least two types of scanning speeds, and a predetermined signal that is generated while the optical scanning means is moving at a constant speed, and that performs scanning based on this signal. and a means for generating a timing signal according to the speed, so that the copying material whose front end is aligned in advance at a predetermined position and is waiting is started to be transported at a constant speed to the next process step by the timing signal. It is characterized by being configured as follows.

本発明による装置では、前記光学走査手段の走査経路に
おける定速走査領域内に存在しかつ予め任意に決められ
た一点において、前記タイミング信号用の信号が発生せ
しめられるのが望ましい。
In the apparatus according to the present invention, it is preferable that the signal for the timing signal is generated at a predetermined arbitrarily determined point within a constant speed scanning area on the scanning path of the optical scanning means.

この場合、タイミング信号用の信号が、光学走査手段の
走査経路の定速走査域に沿って設けられたマイクロスイ
ンチ等の検出手段によって発生せしめられてよい。
In this case, the signal for the timing signal may be generated by a detection means, such as a microsinch, provided along a constant speed scanning area of the scanning path of the optical scanning means.

壕だ、本発明による装置は、少なくとも走査速度、複写
材の待機位置及び機械精度の情報によって前記タイミン
グ信号の発生を調整する調整手段(例えばRC回路や、
マイコンでのソフトタイマー)全有するのが望丑しい。
However, the device according to the invention comprises adjusting means (e.g. an RC circuit,
It would be desirable to have all the soft timers (soft timers on the microcontroller).

以下、本発明を図面に示した実施例に基いて詳細に説明
する。
Hereinafter, the present invention will be explained in detail based on embodiments shown in the drawings.

本実施例による可変倍複写装置は、第1図に示す如く、
光源(図示せず)を有する第1の可動ミラー1aoと、
この可動ミラーの−の速度で同一方向に移動する第2の
ミラー2aoとからなる移動光学系を具備し、また一定
の速度で回転駆動される感光体ドラム3を具備している
。第2のミラー2aoと感光体ドラム3との間の光路に
は、透過型レンズ3aOと共に第3のミラー4ao、第
4のミラー5ao1露光用スリツト6が順次配されてい
る。
The variable magnification copying apparatus according to this embodiment is as shown in FIG.
a first movable mirror 1ao having a light source (not shown);
It is provided with a moving optical system consisting of a second mirror 2ao that moves in the same direction at the speed of - of this movable mirror, and also includes a photosensitive drum 3 that is rotationally driven at a constant speed. In the optical path between the second mirror 2ao and the photosensitive drum 3, a transmission lens 3aO, a third mirror 4ao, a fourth mirror 5ao1, and an exposure slit 6 are arranged in this order.

光源からの光が照射された原稿載置台7上の原稿8の像
は、上記の各ミラー、レンズ、スリット等を介して感光
体ドラム3上に結像せしめられ、所定パターンの露光が
行なわれる。原稿8は、その走査開始端AIが一定の位
置にくるよう忙装置されている。感光体ドラム3はコロ
ナ帯電器9によって予め一様に全面帯電されており、露
光部分の電荷が除去され、非露光部分はそのまま帯電保
持される。感光体3上に形成された潜像は現像器11で
現像された後、転写部12にてコピー紙13に転写され
る。
The image of the document 8 on the document table 7 irradiated with light from the light source is formed on the photoreceptor drum 3 through the above-mentioned mirrors, lenses, slits, etc., and a predetermined pattern of exposure is performed. . The document 8 is arranged so that its scanning start end AI is at a fixed position. The entire surface of the photoreceptor drum 3 is uniformly charged in advance by a corona charger 9, and the charge on the exposed portion is removed, while the non-exposed portion remains charged. The latent image formed on the photoreceptor 3 is developed by a developing device 11, and then transferred to a copy paper 13 by a transfer section 12.

一方、多数のコピー紙13を収容した給紙箱14は上下
2段に設けられ、いずれの給紙箱からもコピー紙13を
任意に供給できるようにコピー紙送出ローラー15が夫
々配されている。各給紙箱14から転写部12に至るコ
ピー紙通路は中間ローラー16の箇所で合流せしめられ
、また各給紙箱14と転写部12との間の各通路長はほ
ぼ等しくなっている。コピー紙送出用のローラー15は
給紙箱14のコピー紙13とは接触しない位置で常時回
転せしめられるが、給紙の信号を受けると同時に降下し
てコピー紙13と接触し、−教会のコピー紙13を装置
内へ送り出す。この送出されたコピー紙13は、その斜
行を防ぐための一対の第1のタイミングローラ−17間
を通過する。このタイミングローラ−17ハ、一時的に
回転が停止されることによってコピー紙前端の゛進行を
阻止し、コピー紙に一定のたるみを生じさせてから、再
び回転を開始するように構成されていて、紙の片寄、!
lllを矯正する効果がある。捷た、上記ローラー15
は、上記の如くに降下した後、一定時間経過すれば再び
元の位置へ上昇してコピー紙13から離れるので、それ
以降はローラー17及びそれに後続の送り機構によって
コピー紙13が進行せしめられる。ローラー17から送
られてくるコピー紙は中間のローラー16を経て予め定
められた位置で停止される。これについては後で詳しく
述べるが、その進行停止時は各ローラー17及び16(
更にt/i16’)の回転が停止される。
On the other hand, paper feed boxes 14 containing a large number of copy papers 13 are provided in two stages, upper and lower, and copy paper delivery rollers 15 are arranged in each paper feed box so that copy paper 13 can be arbitrarily fed from either paper feed box. The copy paper paths from each paper feed box 14 to the transfer section 12 merge at the intermediate roller 16, and the lengths of the paths between each paper feed box 14 and the transfer section 12 are approximately equal. The copy paper feeding roller 15 is constantly rotated at a position where it does not come into contact with the copy paper 13 in the paper feed box 14, but as soon as it receives a paper feed signal, it descends and comes into contact with the copy paper 13, and - church copy paper 13 into the device. The sent out copy paper 13 passes between a pair of first timing rollers 17 to prevent it from being skewed. This timing roller 17 is configured to stop the rotation of the copy paper temporarily, thereby preventing the leading edge of the copy paper from advancing, causing a certain amount of slack in the copy paper, and then restarting the rotation. , paper skew,!
It has the effect of correcting lll. The rolled roller 15
After descending as described above, after a certain period of time has elapsed, the paper rises again to its original position and leaves the copy paper 13, and from then on the copy paper 13 is advanced by the roller 17 and the subsequent feeding mechanism. The copy paper sent from roller 17 passes through intermediate roller 16 and is stopped at a predetermined position. This will be described in detail later, but each roller 17 and 16 (
Furthermore, the rotation at t/i16') is stopped.

また、上記光学系において、元の位置にあるミラー1a
O,2a6からなる移動光学系は、走査を開始して第2
の位置、即ち助走区間toでの走査終了後に達する原稿
始端位置A1に至るまでに上記した工程(コピー紙の進
行停止までの各操作)は終了している。この原稿始端位
置A1における各ミラー’(i71at、2atとして
おく。そして、その位置A+から任意の定速走査位置A
2に移動光学系が達すると、ミラー1alに取付けられ
ているカムが走査経路に沿って設けられたマイクロスイ
ンチ(共に図示せず)に接触して同スイッチを作動せし
める。これによって生じン’v制御信号によって、上記
の一時停止しているローラー17及び16、更には16
′が再び回転駆動され、停止中のコピー紙が再び前方へ
と送り出される。これらの一連の動作は、ローラー17
.16.16′に駆動力を伝達するために各回転軸に設
けられた第1のクラッチ機構(図示せず)と、ローラー
15を含むコピー紙送出機構を駆動する回転軸に設けら
れた第2のクラッチ機構(図示せず)とによって行なわ
れ、かつこれらの制御にはタイマーが用いられる。上記
した如く、各給紙箱14から転写部12までのコピー紙
通路長は等しいので、給紙箱14の上下位置に拘らず、
上記タイマーによる制御作用でコピー紙は予め定められ
た位置に正確に停止することになる。
Further, in the above optical system, the mirror 1a in the original position
The moving optical system consisting of O, 2a6 starts scanning and moves to the second
The above-described steps (each operation up to stopping the copy paper advance) have been completed by the time the document reaches the document start position A1, which is reached after the scan in the run-up section to is completed. Each mirror '(i71at, 2at) at this original starting edge position A1 is then moved from that position A+ to an arbitrary constant speed scanning position A.
When the moving optical system reaches point 2, a cam attached to mirror 1al contacts a microswitch (both not shown) provided along the scanning path to activate the switch. This causes a control signal to cause the temporarily stopped rollers 17 and 16 to
' is rotated again, and the stopped copy paper is sent forward again. These series of operations are performed by the roller 17
.. A first clutch mechanism (not shown) provided on each rotating shaft for transmitting driving force to 16 and 16', and a second clutch mechanism provided on each rotating shaft for driving a copy paper feeding mechanism including roller 15. This is performed by a clutch mechanism (not shown), and a timer is used for these controls. As mentioned above, since the copy paper path length from each paper feed box 14 to the transfer unit 12 is the same, regardless of the vertical position of the paper feed box 14,
The copy paper is accurately stopped at a predetermined position by the control action of the timer.

再び進行が開始されたコピー紙は転写部12にお(11
) いて、感光体ドラム3上に現像された像上に密着1〜、
像が転写される。この転写後にコピー紙は分離部19で
感光体ドラム3から剥離され、次の定着部20でコピー
紙上の像が定着された後、排紙される。
The copy paper that has started to advance again is transferred to the transfer section 12 (11
) and closely adheres to the image developed on the photoreceptor drum 3.
The image is transferred. After this transfer, the copy paper is peeled off from the photosensitive drum 3 at a separating section 19, and the image on the copy paper is fixed at the next fixing section 20, and then the paper is discharged.

上記の各工程の間に、移動光学系は原稿のサイズに応じ
て決められた走査区間での走査を終了し、反転位置1a
3.2a3に各ミラーが達し、反転動作を開始する。こ
の反転と同時に、移動光学系から次の複写工程のために
コピー紙の給送信号が発生し、しかる後に上記した一連
の給紙、搬送等が繰返される。反転後の移動光学系は、
元の位置1aO。
During each of the above steps, the moving optical system completes scanning in a scanning section determined according to the size of the document, and moves to the reversal position 1a.
3. Each mirror reaches 2a3 and starts reversing operation. At the same time as this reversal, a copy paper feeding signal is generated from the moving optical system for the next copying process, and then the above-described series of paper feeding, conveyance, etc. are repeated. The moving optical system after inversion is
Original position 1aO.

2a(1へ戻り、更に再び原稿に対して走査される。2a (returns to 1, and the original is scanned again.

多数枚複写の場合には、上記の一連の動作を繰返せばよ
い。
In the case of copying a large number of sheets, the above series of operations may be repeated.

本実施例では、等倍複写、拡大複写は勿論、2段階の縮
小複写も可能である。複写比率を1=1/n:し名とす
れば、光学走査手段の移動(走査)速度は等倍複写時を
vIとしたとき、Vl : nVt : mVtとガリ
、かつそれに応じてレンズ3aI、  ミラー(12) 4a+、ミラー5alは夫々3 &nz 3am ; 
4anN4am ;5an15a、、lの位置に移動せ
しめられる。
In this embodiment, not only same size copying and enlarged copying but also two-step reduced copying are possible. If the copying ratio is 1=1/n, then the moving (scanning) speed of the optical scanning means is Vl: nVt: mVt, where vI is the same size copying, and the lens 3aI, Mirror (12) 4a+, mirror 5al are each 3 &nz 3am;
4anN4am; 5an15a, , is moved to the l position.

なお、光学走査手段の上記助長距離toは、各倍率の複
写時に同走査手段の走査時間’kTt1T−1T、、、
とし、露光用光源が定常状態になるのに充分な時間をT
としたとき、TI>Tn>Tr、>Tを満たすように設
定される。
The above-mentioned scanning distance to of the optical scanning means is determined by the scanning time 'kTt1T-1T of the optical scanning means at the time of copying at each magnification.
and T is a sufficient time for the exposure light source to reach a steady state.
When, TI>Tn>Tr,>T is set so as to be satisfied.

以上に説明した構成の可変倍複写機において、光学走査
手段が上記した3種類の速度Vl、V−(=nVx)、
Vm(−mVl) (7)うち、任意(DJ[/f元の
位置1ao、 2aoから走査を開始したとする。
In the variable magnification copying machine configured as described above, the optical scanning means operates at the three speeds Vl, V-(=nVx),
Vm (-mVl) (7) Arbitrary (DJ[/f) Assume that scanning is started from the original positions 1ao and 2ao.

この走査手段が助走区間to’に通過し、原稿始端A1
に対応する感光体3上の像位置をB1点、原稿始端AI
より距離t1だけ走査した点A2に対応して原稿始端の
上記像位置B+が回転移動した位置全82点とする。一
定速度vlの周速度で回転する感光体3上のB1点が転
写部12に対応する位置C点に達するとき、上述した給
送系から送られてきたコピー紙の前端が同じく転写部1
2に達すれば、コピー紙と複写画像との先端位置合せは
達成される。通常、コピー紙は感光体30周速度v1と
等しい速度で搬送されるので、第2図のように、感光体
3の周面−FのB2点と6点との距離t B10につい
て、転写部12よ’)、tBlcからt B10だけ短
かい距離戻った位置りにコピー紙前端が待機して位置せ
しめられているものとする。この場合、光学走査手段が
原稿始端より距離t1だけ走査した時点A2で信号を発
生したとすれば、この信号発生時点での感光体3周面上
の原稿画像先端位置B2と転写位置C(!: (D距離
tB2Cに対する、転写位置Cとコピー紙前端の待機位
置りとの距離tcDの差(ts2c −1−co )に
相当する距離を感光体3が周速度v1で進行するのに要
する時間Tl= (tB2C−4cp )/Vlだけ上
記信号発生時から経過した後に、D点にて待機している
複写材の再給送を開始すればよい。
This scanning means passes through the run-up section to', and the document starting edge A1
The image position on the photoreceptor 3 corresponding to point B1, the starting edge of the original AI
The image position B+ at the starting edge of the document is rotated to correspond to the point A2 scanned by a distance t1, resulting in a total of 82 points. When point B1 on the photoreceptor 3, which rotates at a peripheral speed of constant speed vl, reaches point C, which corresponds to the transfer section 12, the leading edge of the copy paper fed from the above-mentioned feeding system also reaches the transfer section 1.
2, the leading edge alignment of the copy paper and the copy image is achieved. Normally, copy paper is conveyed at a speed equal to the circumferential speed v1 of the photoconductor 30, so as shown in FIG. 12'), the leading edge of the copy paper is assumed to be waiting at a position a short distance back from tBlc by tB10. In this case, if a signal is generated at time A2 when the optical scanning means has scanned a distance t1 from the starting edge of the document, then the leading edge position B2 of the document image on the circumferential surface of the photoreceptor 3 and the transfer position C (! : (Time required for photoreceptor 3 to travel at circumferential speed v1 over a distance corresponding to the difference (ts2c -1-co) in distance tcD between transfer position C and standby position of the leading edge of copy paper with respect to D distance tB2C After Tl=(tB2C-4cp)/Vl has elapsed from the time when the above signal was generated, refeeding of the copy material waiting at point D may be started.

ここで、感光体3周面上のB1点とB2点との距離tB
、B2は感光体3の回転速度と光学走査手段の走査速度
から求まり、光学走査手段の走査速度をVとすれば、 tn、n2= tI・V1/V となる。但、変倍比によってV −N Vl(Nは倍率
)として求められるから、 tBIB2 = tl ” ”17’NV+ = ”、
/Nとなる。
Here, the distance tB between point B1 and point B2 on the circumferential surface of photoreceptor 3
, B2 are determined from the rotational speed of the photoreceptor 3 and the scanning speed of the optical scanning means, and if the scanning speed of the optical scanning means is V, then tn, n2=tI·V1/V. However, since it is determined as V - N Vl (N is the magnification) according to the variable magnification ratio, tBIB2 = tl ''``17'NV+ = '',
/N.

依って ’r+ = (tB2C−tco )/ Vt=(As
、c−4B、52−tco )/V+= (tB、C−
tco −Al/N )/Vtとして遅延時間TIを求
めることができる。具体的には、縮小率を1、nXmと
した場合の各遅延時間は、 等倍 : To −(1−BIC−Lco−Al)/V
t1/11倍:Ttn=(tu4cmtco−ntt)
/Vt1/m倍:T1m=(681cm4co−mtl
)/Vlとして予め定めておくことができる。
Therefore, 'r+ = (tB2C-tco)/Vt=(As
, c-4B, 52-tco )/V+= (tB, C-
The delay time TI can be determined as tco - Al/N )/Vt. Specifically, each delay time when the reduction rate is 1, nXm is: Equal magnification: To - (1-BIC-Lco-Al)/V
t1/11 times: Ttn=(tu4cmtco-ntt)
/Vt1/m times: T1m=(681cm4co-mtl
)/Vl.

一方、複写材を一定の待機位置で停止させたり、再給送
(搬送開始)を行なう際には、その回転系(15) の質量やモーメント、或いは信号遅れ、摩擦等の様々な
理由によって若干の遅れを生じる。この遅れを考慮しな
ければ厳密な先端位置合せはできない。そこで、その遅
れ時間、をT2とすれば、実際に設定すべき遅延時間T
は、 T=Tt−T2 として求まる。従って、光学走査手段が原稿始端より!
−1だけ走査した時点にて信号を発生せしめ、この信号
に基いて、上記した計算で求めた時間Tだけ経過した後
、上記方法で予め設定しておいたD点に前端を合せてお
かれた複写材の搬送を開始すれば、複写材と複写画像の
両先端を互いに一致させることができる。
On the other hand, when stopping the copy material at a certain standby position or refeeding (starting conveyance), there may be a slight delay due to various reasons such as the mass and moment of the rotating system (15), signal delay, and friction. resulting in delays. Accurate tip positioning cannot be achieved unless this delay is taken into account. Therefore, if the delay time is T2, then the actual delay time T
is determined as T=Tt-T2. Therefore, the optical scanning means is closer to the beginning of the document!
-1 is scanned, a signal is generated, and based on this signal, after the time T obtained by the above calculation has elapsed, the front end is aligned with the point D set in advance using the above method. When the conveyance of the copied copy material is started, the leading edges of the copy material and the copied image can be brought into alignment with each other.

複写材の給送方法は第2図のように1原稿の走査開始以
前に中間ローラー16.16’まで給送して停止させる
ようにしてよいし、或いは第3図のように、複写材の載
置部(給紙箱14)から直接供給してもよい。第3図で
は、複写材13の全通路長がtcoとなるように予めそ
の給紙箱14を設置し、光(16) 学走査手段がA2点を走査した時点で発生した信号から
7時間経過後にローラー15によって複写材13の給紙
を開始すればよい。
The copying material may be fed by feeding the copying material to the intermediate rollers 16 and 16' and stopping before starting scanning of one original, as shown in FIG. It may also be supplied directly from the loading section (paper feed box 14). In FIG. 3, the paper feed box 14 is set in advance so that the total path length of the copy material 13 is tco, and the optical (16) optical scanning means is scanned at point A2. It is only necessary to start feeding the copy material 13 by the roller 15.

上記の遅延時間Tはタイマー等によって容易かつ正確に
設定できる。この際、遅延時間Tを予め充分に調整して
おけば、原稿始端と複写材前端とを厳密に一致させるこ
とができる。このために例えば第4図に示すタイミング
調整回路を組込み、等倍−縮小(又は拡大)間の給紙タ
イミングのずれを補正するのがよい。この調整回路は既
述したクラッチの駆動回路に設けられ、等借用の出力端
子a1縮小(又は拡大)用の出力端子bX cからの各
出力が夫々選択的に各インバータQIXQz及びQ3、
各可変抵抗R1,R2及びR3、各インバータQ4、Q
5及びQ6、タイオードD1、D2及びD3を介して伝
達され、夫々の出力(給紙又は搬送開始用のタイミング
信号)が夫々取出されるようになっている。この回路は
基本的には、各可変抵抗RIXRコ及びR3とアースと
の間にコンデンサC1、C2及びC3が接続されてなる
RC回路として構成されている。従って、このRC回路
の可変抵抗R夏、R2、R3を夫々調整することによっ
てその時定数を調整し、上記した遅延時間Tをその時定
数で精度よくセットしておくことができる。これによっ
て、上記走査点A2で発生させた信号が入った後、上記
調整回路の時定数により予め決められた遅延時間Tの経
過後に所定のタイミング信号を出力し、複写材の搬送を
定速度で開始させ、にとができる。
The above delay time T can be easily and accurately set using a timer or the like. At this time, if the delay time T is sufficiently adjusted in advance, the starting edge of the document and the leading edge of the copy material can be brought into exact alignment. For this purpose, it is preferable to incorporate, for example, a timing adjustment circuit shown in FIG. 4 to correct the deviation in sheet feeding timing between normal magnification and reduction (or enlargement). This adjustment circuit is provided in the clutch drive circuit described above, and each output from the equally borrowed output terminal a1 reduction (or enlargement) output terminal bX c is selectively applied to each inverter QIXQz and Q3, respectively.
Each variable resistor R1, R2 and R3, each inverter Q4, Q
5 and Q6, and diodes D1, D2, and D3, and the respective outputs (timing signals for starting paper feeding or conveyance) are taken out, respectively. This circuit is basically configured as an RC circuit in which capacitors C1, C2, and C3 are connected between each variable resistor RIXR and R3 and the ground. Therefore, by adjusting the variable resistors R, R2, and R3 of this RC circuit, the time constant can be adjusted, and the above-mentioned delay time T can be set with high precision using the time constant. As a result, after the signal generated at the scanning point A2 is input, a predetermined timing signal is output after a delay time T predetermined by the time constant of the adjustment circuit has elapsed, and the copy material is conveyed at a constant speed. Let it start and you will be able to eat it.

なお、遅れ時間には経時変化等が生じることから、上記
遅延時間の調整のためにマイクロプロセッサ等を用いて
よい。この場合、使用時間、温度、前回の複写時の遅れ
時間その他をデータとしてメモリさせ、演算回路によっ
て遅延時間Tを求める。
Note that since the delay time changes over time, a microprocessor or the like may be used to adjust the delay time. In this case, the usage time, temperature, delay time at the previous copying, etc. are stored as data, and the delay time T is determined by an arithmetic circuit.

これを複写機の制御シークンスの一環として組込めば、
原稿始端と複写材前端とを更に厳密に一致させることが
可能となる。遅延時間Tは、上記以外の手段によっても
勿論設定可能である。
If this is incorporated as part of the copier control sequence,
It becomes possible to more precisely match the starting edge of the original and the leading edge of the copy material. Of course, the delay time T can also be set by means other than the above.

また、上記の/−COは、感光体3等の大きさに対しt
B2c以下であれば何ら制約を受けるものではないが、
これによって複写機全体を非常にコンパクトにまとめる
ことができる。
Moreover, the above /-CO is t with respect to the size of the photoreceptor 3, etc.
There are no restrictions as long as it is below B2c, but
This allows the entire copying machine to be made very compact.

更に、光学走査手段の走査過程で検出されるべき信号は
1つでよいから、多数の信号を発生させる必要はなく、
しかも定速で原稿を走査している途中で信号をとるよう
にしているから、非常に安定した制御信号が得られる等
の利点を有している。
Furthermore, since only one signal is required to be detected during the scanning process of the optical scanning means, there is no need to generate a large number of signals.
Moreover, since the signal is obtained while the document is being scanned at a constant speed, it has the advantage that a very stable control signal can be obtained.

なお、この制御信号は、上記したA2点に対応した位置
に配されたマイクロスイッチによって発生せしめられて
よいが、他の検出手段(例えばフォトセンサやリードス
イッチ)によって発生せしめられてもよい。これらの検
出手段は、上記の原稿下で々くても走査速度が一定とな
る領域であれば任意の位置に配することができ、例えば
原稿の始端位置A1以前の助走区間のうち定速で光学系
が移動し得る領域にセンサを設けてよい。このセンサは
、原稿に対する走査点(即ち光学系の光軸と原稿との交
点、又は光学中心)の走査径路中の位置を検知するもの
であることが必要である。
Note that this control signal may be generated by a microswitch placed at a position corresponding to the above-mentioned point A2, but may also be generated by other detection means (for example, a photosensor or a reed switch). These detection means can be placed at any position under the document as long as the scanning speed is at most constant, for example, at a constant speed in the approach section before the starting edge position A1 of the document. Sensors may be provided in areas where the optical system can move. This sensor is required to detect the position of a scanning point (i.e., the intersection of the optical axis of the optical system and the document, or the optical center) with respect to the document in the scanning path.

また、上記の例では、光学系を移動させたが、逆に原稿
側を移動させる方式においても上記の例(19) せを同様に行なうことができる。
Further, in the above example, the optical system is moved, but the above example (19) can be similarly performed in a method in which the original side is moved.

以上に説明した如く、本発明による複写装置においては
、複写材の給紙箱の数やその位置等に制約されることな
く、光学走査手段が原稿走査中の定められた時点で信号
を検出し、更にこの信号によってタイミング信号を発生
せしめることのみによって、走査手段の走査速度がいが
なるものであっても原稿始端と複写材前端とを正確に位
置合せすることができる。しかも、光学走査手段及び給
紙手段の立上り時における不安定要因に何ら影響を受け
ることなく、確実で安定した動作を行なわせることがで
き、極めて有用な機構となる。本発明による装置では、
複写材の速度と感光体の速度と全一致させない方式にお
いても上記位置合せを極めて簡便に行なうことができる
。つまり、上述の遅延時間T2、TIを適宜予め調整し
ているので、複写材と感光体との位置合せを常に精度良
く簡単に行なえる。
As explained above, in the copying apparatus according to the present invention, the optical scanning means detects a signal at a predetermined time point during document scanning, without being restricted by the number of copy material feed boxes or their positions. Furthermore, only by generating a timing signal using this signal, even if the scanning speed of the scanning means is high, the starting edge of the document and the leading edge of the copying material can be accurately aligned. Moreover, reliable and stable operation can be performed without being affected by unstable factors at the time of start-up of the optical scanning means and paper feeding means, making it an extremely useful mechanism. In the device according to the invention:
Even in a system in which the speed of the copying material and the speed of the photoreceptor are not completely matched, the above-mentioned positioning can be performed extremely easily. That is, since the above-mentioned delay times T2 and TI are appropriately adjusted in advance, the alignment of the copying material and the photoreceptor can always be easily performed with high precision.

(20) また、本発明の装置では、一定速度での光学走査手段の
移動領域中の適当な位(1t(走査域中の任意の位置)
に光学走査手段の検出手段を配せばよい。従って、検出
手段を置く位置は、機械誤差等があっても差支えないの
で、組立で時におけるその調整は不要であシ、取付は時
の注意もそれ程必要でなく、設計の自由産金かなシ大き
くできる。
(20) In addition, in the device of the present invention, an appropriate position (1t (any position in the scanning area) in the movement area of the optical scanning means at a constant speed) is used.
The detection means of the optical scanning means may be arranged at the position of the optical scanning means. Therefore, there is no need to adjust the position of the detection means even if there is a mechanical error, so there is no need to adjust it during assembly, and there is no need to pay much attention to the installation. You can make it bigger.

複写材の搬送開始のための部材、例えばレジスタローラ
ーの位置についても同様であり、注意して配設する必要
がない。要するに、検出手段、更にはレジスタローラー
等のスタート部材を適当な位置に自由に配置し、また電
気的に相互接続された検出手段−スタート部材間に調整
手段を設けて、電気回路によって(又は機械的に)走査
手段の速度、複写材の待機位置及び機械精度(誤差)等
の必要情報に基いて走査手段の速度に応じた異々るタイ
ミング信号を出し、調整されたタイミングでスタート部
材を作動させることができる。
The same applies to the position of members for starting conveyance of the copy material, such as register rollers, and there is no need to carefully arrange them. In short, the detection means and also the starting member, such as a register roller, are freely placed in a suitable position, and the adjustment means are provided between the detecting means and the starting member, which are electrically interconnected, so that the detection means and also the starting member, such as a register roller, are freely arranged, and the adjustment means are provided between the detecting means and the starting member, which are electrically interconnected. Based on necessary information such as the speed of the scanning means, the standby position of the copying material, and machine precision (error), different timing signals are output depending on the speed of the scanning means, and the start member is actuated at the adjusted timing. can be done.

このタイミングの調整は、例えば走査速度の異なる数に
等しい(例えば2種の走査速度では2個の)RC回路の
各係数を連続的に変化させるようにしておき、組立て時
に各係数を変化させて夫々の走査速度でタイミングが一
致するように調整すれば、使用時にはもはやその調整が
不要であると共に、各部材の位置を適当に選べてコンパ
クト化にとって非常に有利となる。この場合、複数のR
C回路の選択は、走査速度の切換えと同期して電気的又
は機械的に、各走査速度に対応した回路を選択できるよ
うにすればよい。このタイミングの調整は総合的に行な
われるから、走行距離差、位置、機械又は設計精度等を
すべて吸収し、タイミング調整を常に精確に行なえるこ
とになる。
This timing adjustment can be done, for example, by continuously changing each coefficient of the RC circuit equal to the number of different scanning speeds (for example, two for two scanning speeds), and by changing each coefficient during assembly. If the timings are adjusted to match at each scanning speed, this adjustment is no longer necessary during use, and the positions of each member can be appropriately selected, which is very advantageous for compactness. In this case, multiple R
The C circuit may be selected by electrically or mechanically synchronously with the switching of the scanning speed so that the circuit corresponding to each scanning speed can be selected. Since this timing adjustment is performed comprehensively, it is possible to absorb all differences in travel distance, position, mechanical accuracy, design accuracy, etc., and to always perform accurate timing adjustment.

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

図面は本発明の実施例を示すものであって、第1図は可
変倍複写機の全体の概略断面図、第2図は第1図におけ
る複写材搬送機構を主として示す断面図、 第3図は別の複写材搬送機構の断面図、第4図は複写材
搬送用のタイミング調整回路の等価回路図 である1、 なお、図面に用いられている符号において、laO〜l
a3.2ao〜2a3.4a□〜4a3.5ao〜5a
3・・・・・・・・・・・・ミラー3a6〜3a3・・
・・・・・・・・・・レンズ6・・・・・・・・・・・
・・・・露光用スリット8・・・・・・・・・・・・・
・・原稿9・・・・・・・・・・・・・・・帯電器11
・・・・・・・・・・・・現像器 12・・・・・・・・・・・・転写部 13・・・・・・・・・・・・複写材(コピー紙)15
.16.16′、17・・・・・・・・・・・・ローラ
ー19・・・・・・・・・・・・分離部 20・・・・・・・・・・・・定着部 A1・・・・・・・・・・・・原稿走査開始端A2・・
・・・・・・・・・・中間走査点to・・・・・・・・
・・・・助走区間である。 代理人 弁理士 逢 坂  宏 (23) 届1図
The drawings show an embodiment of the present invention, in which FIG. 1 is a schematic cross-sectional view of the entire variable magnification copying machine, FIG. 2 is a cross-sectional view mainly showing the copy material conveying mechanism in FIG. 1, and FIG. 1 is a sectional view of another copy material transport mechanism, and FIG. 4 is an equivalent circuit diagram of a timing adjustment circuit for copy material transport.
a3.2ao~2a3.4a□~4a3.5ao~5a
3・・・・・・・・・Mirror 3a6~3a3...
・・・・・・・・・・Lens 6・・・・・・・・・・・・・
...Exposure slit 8...
・・Manuscript 9・・・・・・・・・・・・Charger 11
.........Developer 12...Transfer section 13...Copy material (copy paper) 15
.. 16.16', 17...Roller 19...Separation section 20...Fixing section A1・・・・・・・・・Original scanning start edge A2...
......Intermediate scanning point to...
...This is the run-up section. Agent Patent Attorney Hiroshi Aisaka (23) Notification 1

Claims (1)

【特許請求の範囲】 l、少なくとも2種類の走査速度を任意に選択できる光
学走査手段と、この光学走査手段の定速移動中に所定の
信号を発生し、この信号に基いて走査速度に応じたタイ
ミング信号を発生する手段とを夫々有し、所定位置に予
め前端が位置合せされて待機せしめられている複写材を
前記タイミング信号によって次の工程段階へ定速で搬送
開始するように構成されたことを特徴とする可変倍複写
装置。 2、前記光学走査手段の走査経路における定速走査領域
内に存在しかつ予め任意に決められた一点において、前
記タイミング信号用の信号が発生せしめられる、特許請
求の範囲の第1項に記載した装置。 3、前記タイミング信号用の信号が、光学走査手段の走
査経路の定速走査域に沿って設けられた検出手段によっ
て発生せしめられる、特許請求の範囲の第1:QI又は
第2項に記載した装置。 4、少なくとも走査速度1.複写材の待機位置及び機械
精度の情報によって前記タイミング信号の発生を調整す
る調整手段を有する、特許請求の範囲の第1項〜第3項
のいずれか1項に記載した装置。 5、RC回路によって前記タイミング信号の発生が調整
される、特許請求の範囲の第4項に記載した装置。
[Claims] l. Optical scanning means capable of arbitrarily selecting at least two types of scanning speeds, and generating a predetermined signal while the optical scanning means is moving at a constant speed, and adjusting the scanning speed based on this signal. and a means for generating a timing signal, and is configured to start conveying the copy material, whose front end has been aligned in advance at a predetermined position and has been kept on standby, to the next process step at a constant speed according to the timing signal. A variable magnification copying device characterized by: 2. The signal for the timing signal is generated at a predetermined point that exists within a constant speed scanning area on the scanning path of the optical scanning means, Device. 3. The timing signal according to claim 1: QI or 2, wherein the signal for the timing signal is generated by a detection means provided along a constant speed scanning area of a scanning path of an optical scanning means. Device. 4. At least scanning speed 1. 4. The apparatus according to claim 1, further comprising adjusting means for adjusting the generation of the timing signal based on information on the standby position of the copying material and machine accuracy. 5. The apparatus according to claim 4, wherein the generation of the timing signal is regulated by an RC circuit.
JP710882A 1982-01-20 1982-01-20 Variable power copying device Pending JPS58125065A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP710882A JPS58125065A (en) 1982-01-20 1982-01-20 Variable power copying device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP710882A JPS58125065A (en) 1982-01-20 1982-01-20 Variable power copying device

Publications (1)

Publication Number Publication Date
JPS58125065A true JPS58125065A (en) 1983-07-25

Family

ID=11656887

Family Applications (1)

Application Number Title Priority Date Filing Date
JP710882A Pending JPS58125065A (en) 1982-01-20 1982-01-20 Variable power copying device

Country Status (1)

Country Link
JP (1) JPS58125065A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63249834A (en) * 1987-04-07 1988-10-17 Ricoh Co Ltd Electrostatic copying machine
EP0361426A2 (en) * 1988-09-27 1990-04-04 Mita Industrial Co., Ltd. Image-forming machine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63249834A (en) * 1987-04-07 1988-10-17 Ricoh Co Ltd Electrostatic copying machine
EP0361426A2 (en) * 1988-09-27 1990-04-04 Mita Industrial Co., Ltd. Image-forming machine
US5118093A (en) * 1988-09-27 1992-06-02 Mita Industrial Co., Ltd. Image-forming machine

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