JPS6122303B2 - - Google Patents
Info
- Publication number
- JPS6122303B2 JPS6122303B2 JP52040975A JP4097577A JPS6122303B2 JP S6122303 B2 JPS6122303 B2 JP S6122303B2 JP 52040975 A JP52040975 A JP 52040975A JP 4097577 A JP4097577 A JP 4097577A JP S6122303 B2 JPS6122303 B2 JP S6122303B2
- Authority
- JP
- Japan
- Prior art keywords
- document
- optical system
- detection means
- original
- correction method
- 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.)
- Expired
Links
- 238000001514 detection method Methods 0.000 claims description 37
- 230000003287 optical effect Effects 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 12
- 108091008695 photoreceptors Proteins 0.000 claims description 4
- 238000011144 upstream manufacturing Methods 0.000 claims description 4
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 239000011521 glass Substances 0.000 description 9
- 238000003708 edge detection Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000005286 illumination Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Landscapes
- Variable Magnification In Projection-Type Copying Machines (AREA)
- Control Or Security For Electrophotography (AREA)
- Paper Feeding For Electrophotography (AREA)
Description
【発明の詳細な説明】
本発明は、変倍装置を具備し、原稿をスリツト
露光により移動する感光体面上に投影して静電潜
像を形成し、その場合変倍の倍率の選択に応じて
原稿走査速度が変化するようにした複写機に関す
る。DETAILED DESCRIPTION OF THE INVENTION The present invention is provided with a variable magnification device, and forms an electrostatic latent image by projecting an original onto a moving photoreceptor surface by slit exposure, and in this case, the magnification can be adjusted according to the selection of the magnification of the variable magnification. The present invention relates to a copying machine in which the document scanning speed can be changed.
一般に、シート原稿を搬送し、固定光学系によ
り移動する感光体に上記原稿の光像を照射する方
式にて、原稿像の先端と転写紙の先端を一致させ
るため、即ちレジストレーシヨンを合わせるため
に、移動原稿の先端を検知し、この検知信号の一
定時間後に転写紙の給送を行うことは知られてい
る。従来上記の原稿先端検知手段は、原稿露光ス
リツトの上流に配置されている。複写倍率が常に
一定の時は、上記の方式で充分でありレジストレ
ーシヨンのずれは生じない。しかし、変倍装置を
具備する複写機では、倍率により原稿速度が変化
するので、原稿検知よりスリツト内基準位置まで
原稿が到達する時間も変化する。従つて、先端検
知から一定時間後に転写紙の給送を行う場合に
は、レジストレーシヨンのずれが発生する。上記
のスリツト内基準位置とは、変倍のためレンズや
ミラー等が移動して投影スリツト幅に変化があつ
ても、位置の全く変化しない光路中の１光線の各
スリツトにおける位置である。 Generally, in order to align the leading edge of the original image with the leading edge of the transfer paper, that is, to align the registration, by transporting a sheet original and irradiating a light image of the original onto a moving photoreceptor using a fixed optical system. It is known that the leading edge of a moving original is detected and the transfer paper is fed after a certain period of time from this detection signal. Conventionally, the above-mentioned document leading edge detection means is arranged upstream of the document exposure slit. When the copying magnification is always constant, the above method is sufficient and no registration deviation occurs. However, in a copying machine equipped with a variable magnification device, the speed of the original changes depending on the magnification, so the time it takes for the original to reach the reference position in the slit after the original is detected also changes. Therefore, when the transfer paper is fed a certain period of time after the leading edge is detected, a registration shift occurs. The above-mentioned in-slit reference position is the position of one ray in each slit in the optical path that does not change at all even if the width of the projection slit changes due to movement of lenses, mirrors, etc. due to zooming.
例えば第１図に於て、原稿先端検知スイツチ２
０が露光スリツト４の上流に配置され、その場合
原稿先端検知より露光スリツト４内の基準位置４
ａまでの距離をｌとする。基準倍率m1のときの
原稿移動速度をｖとすると、他の倍率m2のとき
の原稿移動速度は
ｍ１／ｍ２ｖ
となる。従つて、倍率m1のとき原稿が距離ｌを
走行する時間をt1、そして倍率m2のときの時間を
t2とすると、次式が成立する。 For example, in Fig. 1, the document leading edge detection switch 2
0 is placed upstream of the exposure slit 4, and in that case, the reference position 4 in the exposure slit 4 is determined by detecting the leading edge of the document.
Let the distance to a be l. If the document moving speed at the standard magnification m 1 is v, then the document moving speed at other magnifications m 2 is m 1 /m 2 v. Therefore, when the magnification is m 1 , the time it takes for the document to travel the distance l is t 1 , and when the magnification is m 2 , the time is
When t 2 , the following equation holds.
t1＝ｌ／ｖ、t2＝ｍ２／ｍ１ ｌ／ｖ
よつて時間的ずれは
t1−t2＝ｌ／ｖ−ｍ２／ｍ１ ｌ／ｖ＝（１−ｍ２
／ｍ１）ｌ／ｖ
となる。感光体の移動速度はm1vであるから、レ
ジストレーシヨンのずれは
（１−ｍ２／ｍ１）ｌ／ｖ×m1v＝（１−ｍ２／ｍ１）m
1l……(1)
である。例えば、基準倍率m1＝１そしてm2＝
0.71（これはA3をA4に変える倍率に相当する）
とし、ｌ＝20mmとすると、上記のレジストレーシ
ヨンのずれ量は式(1)より
（１−0.71）×20＝5.8mm
となる。 t 1 = l/v, t 2 = m 2 /m 1 l/v Therefore, the time lag is t 1 - t 2 = l/v-m 2 /m 1 l/v = (1-m 2
/m 1 )l/v. Since the moving speed of the photoreceptor is m 1 v, the registration deviation is (1-m 2 /m 1 )l/v×m 1 v=(1-m 2 /m 1 )m
1 l...(1). For example, the reference magnification m 1 = 1 and m 2 =
0.71 (this corresponds to the magnification that changes A3 to A4)
If l = 20 mm, then the above registration deviation amount is (1 - 0.71) x 20 = 5.8 mm from equation (1).
本発明は、式(1)よりｌ＝０のときにレジストレ
ーシヨンのずれ量が０となることに着目し、原稿
先端検知手段を原稿露光スリツト内基準位置に配
置しようとするものである。以下第２図以下につ
いて、本発明の実施例を説明する。 The present invention focuses on the fact that the amount of registration deviation becomes 0 when l=0 from equation (1), and attempts to arrange the document leading edge detection means at a reference position within the document exposure slit. Embodiments of the present invention will be described below with reference to FIG. 2 and subsequent figures.
第２図に示す電子写真複写機は、そのケーシン
グ１の上側壁に厚手原稿載置用透明ガラス２およ
び薄手原稿、即ちシート原稿送り装置３を具備
し、このシート原稿搬送径路内に原稿露光スリツ
ト４が設けてある。この場合シート原稿５は、矢
印の方向に手動により又は自動原稿供給装置によ
り送り込まれる。光源６、反射鏡７，８，９およ
びレンズ系１０よりなる露光装置がケーシング１
内に設けられ、ガラス２上に載置した厚手原稿の
複写の場合は、原稿走査のため光源６、反射鏡７
および８は移動する。又レンズ系１０および反射
鏡９は、変倍の倍率変化のために実線と鎖線で示
す両位置の間を移動することが出来る。 The electrophotographic copying machine shown in FIG. 2 is equipped with a transparent glass 2 for placing thick originals and a sheet original feeding device 3 on the upper side wall of a casing 1, and an original exposure slit in the sheet original conveying path. 4 is provided. In this case, the sheet document 5 is fed in the direction of the arrow either manually or by an automatic document feeder. An exposure device consisting of a light source 6, reflecting mirrors 7, 8, 9, and a lens system 10 is located in the casing 1.
When copying a thick original placed on the glass 2, a light source 6 and a reflecting mirror 7 are used to scan the original.
and 8 move. Further, the lens system 10 and the reflecting mirror 9 can be moved between the positions shown by the solid line and the chain line in order to change the magnification during zooming.
感光体ドラム１１が矢印方向に回転可能に装着
され、その周囲に周知のごとく帯電装置１２、露
光位置２１、現像装置１３、転写装置１４、除電
装置１５、クリーニング装置１６が配置されてい
る。１７は給紙装置、１８は給送ローラ（レジス
トローラ）、そして１９は定着装置である。給紙
装置１７には２種類の寸法の紙を入れる２個のカ
セツト２２が設けられ、各カセツトには給出ロー
ラ２３がそれぞれ附設されている。 A photosensitive drum 11 is mounted rotatably in the direction of the arrow, and a charging device 12, an exposure position 21, a developing device 13, a transfer device 14, a static eliminator 15, and a cleaning device 16 are arranged around the photosensitive drum 11, as is well known. 17 is a paper feeding device, 18 is a feeding roller (registration roller), and 19 is a fixing device. The paper feeder 17 is provided with two cassettes 22 for holding paper of two different sizes, and each cassette is provided with a feed roller 23, respectively.
上述の装置において、特に第３図に示すよう
に、原稿搬送径路にて露光スリツト４の上流側に
原稿挿入検知スイツチ２４を、そして露光スリツ
ト内基準位置４ａに原稿先端検知装置２５を配置
している。送りローラ対３ａにより送られるシー
ト原稿５は検知スイツチ２４により先端を検知さ
れ、第４図のタイムチヤートに示すように、この
検知信号によりいずれかの給出ローラ２３の回転
開始、光源６の点灯、帯電器１２の給電が行われ
る。給出ローラ２３の回転により送られるカセツ
ト２２上の転写紙は、このときまだ停止している
給送ローラ１８に当つて停止し、こゝで待機姿勢
をとる。原稿５は、ついで露光スリツト４に達し
て光源６により照射されると共に、スリツト内基
準位置にある検知装置２５によりその先端を検知
される。第４図に示すように、原稿５の先端が検
知スイツチ２４により検知されてより検知装置２
５により再び検知されるまでの時間は倍率によつ
て異なるが、各倍率にて検知装置２５の検知信号
発信より転写紙給送までの時間T0は常に一定で
ある。即ち、給送ローラ１８は検知装置２５の原
稿先端検知より一定時間T0の後に回転を再開
し、待機中の転写紙を送り出す。かく送り出され
た転写紙は、露光位置２１にて原稿５の光像をう
け現像装置１３で可視像化された感光体ドラム１
１の可視像に重畳されて転写位置を通過する。上
記の時間T0は、このように感光体ドラム１１上
の像と給送ローラ１８により送られる転写紙と
が、転写位置にて合致するように設定されるもの
であり、０をも含むものである。 In the above-mentioned apparatus, in particular, as shown in FIG. 3, a document insertion detection switch 24 is arranged on the upstream side of the exposure slit 4 in the document conveyance path, and a document leading edge detection device 25 is arranged at the reference position 4a in the exposure slit. There is. The leading edge of the sheet document 5 sent by the feed roller pair 3a is detected by the detection switch 24, and as shown in the time chart of FIG. 4, this detection signal causes one of the feed rollers 23 to start rotating and the light source 6 to turn on. , power is supplied to the charger 12. The transfer paper on the cassette 22, which is fed by the rotation of the feeding roller 23, comes into contact with the feeding roller 18, which is still stopped at this time, and stops, thereby taking a standby position. The original 5 then reaches the exposure slit 4 and is irradiated by the light source 6, and its leading edge is detected by the detection device 25 located at the reference position within the slit. As shown in FIG. 4, the leading edge of the document 5 is detected by the detection switch 24 and the detection device 2
Although the time until detection is again performed by 5 differs depending on the magnification, the time T 0 from the generation of the detection signal from the detection device 25 to the feeding of the transfer paper is always constant at each magnification. That is, the feeding roller 18 resumes rotation after a predetermined time T 0 after the detection device 25 detects the leading edge of the document, and feeds out the waiting transfer paper. The transferred paper is transferred to the photosensitive drum 1, which receives the light image of the original 5 at the exposure position 21 and is turned into a visible image by the developing device 13.
It passes through the transfer position superimposed on the visible image of No. 1. The above time T 0 is set so that the image on the photosensitive drum 11 and the transfer paper fed by the feeding roller 18 match at the transfer position, and includes 0. .
原稿先端検知装置２５の検知信号より一定時間
T0の後に給送ローラ１８を回転駆動する手段と
しては、タイマー装置、デジタル制御回路等を用
いることが出来るが、次に機械的遅延装置の１例
を示す。 A certain period of time from the detection signal of the document leading edge detection device 25
A timer device, a digital control circuit, etc. can be used as a means for rotationally driving the feeding roller 18 after T 0 , and an example of a mechanical delay device will be shown below.
第５図にて、検知装置２５の検知信号によりソ
レノイド２６に通電が行われ、そのプランジヤ２
７を介して制御レバー２８をばね２９の作用に抗
してその支点２８Ａの回りに時計方向に旋回させ
る。それによつて、カム３０の止め部３０Ａに係
止していた制御レバー２８の爪３１が外れるの
で、カム３０は駆動軸３２との摩擦作用により矢
印方向に連行回転される。カム３０に設けられた
突部３３は、一定時間T0の後にスイツチ３４の
アクチユエータを作動し、それによつて給送ロー
ラ１８の回転を触発する。カム３０は、１回転後
再び爪３１により停止せしめられる。 In FIG. 5, the solenoid 26 is energized by the detection signal of the detection device 25, and the plunger 2
7, the control lever 28 is pivoted clockwise about its fulcrum 28A against the action of the spring 29. As a result, the pawl 31 of the control lever 28 that is engaged with the stop portion 30A of the cam 30 is released, and the cam 30 is rotated in the direction of the arrow due to friction with the drive shaft 32. A protrusion 33 on the cam 30 actuates the actuator of the switch 34 after a certain time T 0 and thereby triggers the rotation of the feed roller 18 . The cam 30 is stopped again by the pawl 31 after one rotation.
原稿露光スリツトにはガラス板が設置されてい
るので、マイクロスイツチにより紙厚のみに依存
する検知は困難であり、又この位置には照明光が
溢れているので光電素子を用いることは不可能で
ある。従つて検知装置２５としては、超音波発振
装置とマイクロフオンを用いたものにより、ガラ
スと原稿の超音波反射率の差を利用して原稿先端
を検知する。この場合、発振装置の故障と原稿よ
りの反射をも区別するため、検知装置２５は次の
３段階の検知能力を有する必要がある。 Since a glass plate is installed in the document exposure slit, it is difficult to detect the document using a microswitch based only on the paper thickness, and since this position is flooded with illumination light, it is impossible to use a photoelectric element. be. Therefore, the detection device 25 uses an ultrasonic oscillator and a microphone to detect the leading edge of the document by utilizing the difference in ultrasonic reflectance between the glass and the document. In this case, in order to distinguish between a failure of the oscillator and reflection from the original, the detection device 25 needs to have the following three levels of detection ability.
ガラスよりの反射
原稿よりの反射
反射なし
かくすることにより、ガラス上でも又光が溢れ
ていても影響を受けずに、原稿先端の検知が可能
となる。 Reflection from the glass Reflection from the original No reflection By doing this, it is possible to detect the leading edge of the original without being affected by the glass or even if there is a lot of light.
他の方法として、照明光にはあまり含まれない
波長の光、例えば紫外線、赤外線を発生する部材
とこれら光のみに応ずる素子との組合せを用い
る。 Another method is to use a combination of a member that generates light of wavelengths that are not included in illumination light, such as ultraviolet rays and infrared rays, and an element that responds only to these lights.
本発明は、上述のようにシート原稿搬送方式の
複写機に対してのみならず、原稿台移動方式又は
光学系移動方式の複写機に対しても好都合に適用
出来る。原稿台移動および光学系移動の各方式に
適用せる例を、第６図および第７図に示す。 The present invention can be advantageously applied not only to a copying machine using a sheet document transport method as described above, but also to a copying machine using a document table moving method or an optical system moving method. Examples of application to each method of document table movement and optical system movement are shown in FIGS. 6 and 7.
第６図に於て、原稿載置ガラス３５上に厚手原
稿３６が載置され、移動光学系３７が原稿３６を
走査するようになつている。移動光学系には光源
３８、反射鏡３９および作動片４０が固着され、
更に反射鏡４１は光学系３７の半分の速度で移動
する。４２は、変倍光学系である。移動光学系３
７の走行径路にして、原稿載置ガラス３５を支持
するケーシング上側壁に、第１検知スイツチ４３
および第２検知スイツチ４４が配置されている。
第１検知スイツチ４３は、第３図に示す原稿挿入
検知スイツチ２４に相等し、この検知スイツチ４
３が光学系の作動片４０により作動されるとき、
転写紙の給出、帯電器および光源の給電を行う。
第２検知スイツチ４４は、第３図に示す検知装置
２５に相当し、原稿３６の露光が開始されるのに
対応する位置に配置されている。第１および第２
検知スイツチ４３および４４は、光学系３７が走
行するとき、作動片４０により作動される。この
場合、第２検知スイツチ４４は、原稿載置ガラス
３５上の原稿の載置されるべき露光域の始端と移
動光学系３７の露光スリツト内基準位置とが合致
するときに、作動片４０により作動される。 In FIG. 6, a thick original 36 is placed on the original placing glass 35, and the moving optical system 37 scans the original 36. A light source 38, a reflecting mirror 39, and an actuating piece 40 are fixed to the moving optical system.
Furthermore, the reflecting mirror 41 moves at half the speed of the optical system 37. 42 is a variable magnification optical system. Moving optical system 3
A first detection switch 43 is installed on the upper side wall of the casing that supports the document placement glass 35.
and a second detection switch 44 are arranged.
The first detection switch 43 is equivalent to the document insertion detection switch 24 shown in FIG.
3 is actuated by the actuating piece 40 of the optical system,
Feeds the transfer paper and supplies power to the charger and light source.
The second detection switch 44 corresponds to the detection device 25 shown in FIG. 3, and is arranged at a position corresponding to the start of exposure of the original 36. 1st and 2nd
Detection switches 43 and 44 are actuated by actuating piece 40 when optical system 37 travels. In this case, the second detection switch 44 is activated by the actuating piece 40 when the starting end of the exposure area where the original is to be placed on the original placing glass 35 matches the reference position in the exposure slit of the moving optical system 37. activated.
第７図に示す実施例に於て、原稿４５を載せて
移動する原稿台４６に作動突起４７を設け、この
作動突起の作動範囲にして原稿台４６の移動方向
に第１検知スイツチ４８および第２検知スイツチ
４９を配置している。 In the embodiment shown in FIG. 7, an actuating protrusion 47 is provided on the document table 46 on which a document 45 is placed and moves, and the first detection switch 48 and the 2 detection switches 49 are arranged.
第６図および第７図の実施例における第１検知
スイツチ４３および４８は、必らずしも必要でな
く、転写紙の給出、帯電器および光源の給電は別
の信号、例えばプリント信号等に置き換えること
が出来る。 The first detection switches 43 and 48 in the embodiments of FIGS. 6 and 7 are not necessarily required, and feeding of the transfer paper, power supply of the charger and the light source are performed using other signals, such as print signals, etc. It can be replaced with
上述のように、本発明による補正方法は、変倍
の倍率により原稿走査速度が変化しても原稿像の
先端と複写紙の先端との一致、即ちレジストレー
シヨンの合致を確実に保証するものである。 As described above, the correction method according to the present invention reliably guarantees that the leading edge of the original image and the leading edge of the copy paper match, that is, the registration matches, even if the scanning speed of the original changes depending on the magnification. It is.
第１図は従来のシート原稿露光スリツト範囲の
図式図、第２図は本発明を適用せる変倍式複写機
の説明図、第３図は第２図に示す複写機のシート
原稿露光スリツト範囲の図式図、第４図は本発明
方法の実施の場合のタイムチヤートの１例、第５
図は時間遅延機構の説明図、第６図は本発明を光
学系移動方式の複写機に適用した実施例の要部の
図、第７図は同じく原稿台移動方式の複写機に適
用した実施例の要部の図である。
３……シート原稿送り装置、４……原稿露光ス
リツト、５，３６，４５……原稿、１１……感光
体ドラム、１８……転写紙給送ローラ、２５，４
４，４９……原稿検知手段。
Fig. 1 is a schematic diagram of a conventional sheet original exposure slit range, Fig. 2 is an explanatory diagram of a variable magnification type copying machine to which the present invention is applied, and Fig. 3 is a sheet original exposure slit range of the copying machine shown in Fig. 2. FIG. 4 is an example of a time chart when implementing the method of the present invention, and FIG.
The figure is an explanatory diagram of the time delay mechanism, Figure 6 is a diagram of the main part of an embodiment in which the present invention is applied to a copying machine using a moving optical system, and Figure 7 is an embodiment in which the present invention is also applied to a copying machine using a moving document table. It is a figure of the main part of an example. 3...Sheet document feeding device, 4...Document exposure slit, 5, 36, 45...Document, 11...Photosensitive drum, 18...Transfer paper feeding roller, 25, 4
4,49...Document detection means.
Claims (1)
り移動する感光体面上に投影して静電潜像を形成
し、この場合変倍の倍率の選択に応じて原稿走査
速度が変化するようにした複写機に於て、原稿搬
送径路にて又は移動光学系の走行径路にて搬送さ
れる原稿先端と光学系の基準位置が一致したこと
を検知する手段又は露光域始端位置と移動光学系
の基準位置とが一致したことを検知する手段を設
け、この第１検知手段の検知信号より一定時間後
に転写紙の給送を行うことを特徴とするレジスト
レーシヨン補正方法。 ２ 上記検知手段の上流に原稿の挿入又は光学系
等のスタートを検知する第２検知手段を配置し、
この第２検知手段の検知信号により光源、帯電
器、転写紙給出装置の少くとも１つに給電するこ
とを特徴とする特許請求の範囲第１項に記載のレ
ジストレーシヨン補正方法。 ３ 第１検知手段が、特定波長の電磁波発生装置
とこの電磁波に感応する感応部材とからなること
を特徴とする特許請求の範囲第１項又は第２項に
記載のレジストレーシヨン補正方法。 ４ 第１検知手段が、超音波発振装置とマイクロ
フオンとからなることを特徴とする特許請求の範
囲第１項又は第２項に記載のレジストレーシヨン
補正方法。[Claims] 1. A magnification variable device is provided, which projects an original onto a moving photoreceptor surface by slit exposure to form an electrostatic latent image; means for detecting that the leading edge of a document being conveyed in the document conveyance path or in the travel path of the moving optical system matches the reference position of the optical system, or the exposure area starting point position in a copying machine in which the A registration correction method characterized in that means is provided for detecting that the reference position of the moving optical system coincides with the reference position of the moving optical system, and the transfer paper is fed after a certain period of time from the detection signal of the first detection means. 2. A second detection means for detecting insertion of a document or start of an optical system, etc. is disposed upstream of the detection means,
2. The registration correction method according to claim 1, wherein power is supplied to at least one of a light source, a charger, and a transfer paper feeding device based on the detection signal of the second detection means. 3. The registration correction method according to claim 1 or 2, wherein the first detection means comprises an electromagnetic wave generator of a specific wavelength and a sensitive member sensitive to the electromagnetic wave. 4. The registration correction method according to claim 1 or 2, wherein the first detection means comprises an ultrasonic oscillator and a microphone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4097577A JPS53126931A (en) | 1977-04-12 | 1977-04-12 | Correcting method for registration of variable multiplication copier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4097577A JPS53126931A (en) | 1977-04-12 | 1977-04-12 | Correcting method for registration of variable multiplication copier |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62227737A Division JPH01105275A (en) | 1987-09-11 | 1987-09-11 | Recorder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS53126931A JPS53126931A (en) | 1978-11-06 |
| JPS6122303B2 true JPS6122303B2 (en) | 1986-05-31 |
Family
ID=12595436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4097577A Granted JPS53126931A (en) | 1977-04-12 | 1977-04-12 | Correcting method for registration of variable multiplication copier |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS53126931A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5008712B1 (en) * | 1980-10-17 | 1995-04-18 | Canon Kk | Variable magnification copying apparatus and automatic shutdown therefor |
| JPS59143163A (en) * | 1983-02-04 | 1984-08-16 | Fuji Xerox Co Ltd | Controller of copying machine |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50158333A (en) * | 1974-06-10 | 1975-12-22 | ||
| JPS5275332A (en) * | 1975-12-18 | 1977-06-24 | Canon Inc | Variable multiplication copying machine |
-
1977
- 1977-04-12 JP JP4097577A patent/JPS53126931A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50158333A (en) * | 1974-06-10 | 1975-12-22 | ||
| JPS5275332A (en) * | 1975-12-18 | 1977-06-24 | Canon Inc | Variable multiplication copying machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS53126931A (en) | 1978-11-06 |
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