JPS60216366A - Copying machine - Google Patents

Copying machine

Info

Publication number
JPS60216366A
JPS60216366A JP59074419A JP7441984A JPS60216366A JP S60216366 A JPS60216366 A JP S60216366A JP 59074419 A JP59074419 A JP 59074419A JP 7441984 A JP7441984 A JP 7441984A JP S60216366 A JPS60216366 A JP S60216366A
Authority
JP
Japan
Prior art keywords
image
original
density
reference image
optical system
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
JP59074419A
Other languages
Japanese (ja)
Inventor
Yutaka Kudome
久留 裕
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 JP59074419A priority Critical patent/JPS60216366A/en
Publication of JPS60216366A publication Critical patent/JPS60216366A/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
    • G03G15/50Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control
    • G03G15/5033Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control by measuring the photoconductor characteristics, e.g. temperature, or the characteristics of an image on the photoconductor
    • G03G15/5041Detecting a toner image, e.g. density, toner coverage, using a test patch
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00Apparatus for electrophotographic processes
    • G03G2215/00025Machine control, e.g. regulating different parts of the machine
    • G03G2215/00029Image density detection
    • G03G2215/00033Image density detection on recording member
    • G03G2215/00037Toner image detection
    • G03G2215/00042Optical detection

Abstract

PURPOSE:To hold the density of a transfer image on recording paper invariably constant by moving the same optical system and exposing and scanning a reference image plate provided outside of platen glass before an original is exposed and scanned. CONSTITUTION:The 1st mirror unit 3 and the 2nd mirror unit 4 start exposing and scanning the reference image plate P with a signal from a sensor which detects the passing of the original, and a photosensitive drum 6 and respective processes of image formation regarding it operate. Consequently, an image of the image plate P is formed as an electrostatic latent image on the peripheral surface of the drum 6 and visualized into toner image. Then, information for controlling the quantity of exposure, an electrostatic charging voltage, or developing bias for adjusting the density and gradations of the transfer image from an original to be copied successively to a proper state is obtained from the result of the detection of the density of the toner image.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は記録紙上の転写画像の濃度を常に一定かつ適正
に保つことの出来る複写機の改良に関するものである。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement in a copying machine that can always keep the density of a transferred image on recording paper constant and appropriate.

〔従来技術〕[Prior art]

事務機として使用される電子写真複写機では、文書をは
じめとしてグラフ、図面あるいは写真に至る迄濃度の階
調の異なる多くの原稿によるコピーがなされる機会が多
い。
2. Description of the Related Art Electrophotographic copying machines used as office machines often make copies of many original documents with different density gradations, including documents, graphs, drawings, and photographs.

従って複写機における画像形成の基準としては、前述し
た如き多種類の原稿において最も代表的かつ大多数を占
める濃度の階調をもった原稿を、記録紙上に同等の濃度
の画像として再現できることを要件としている。
Therefore, as a standard for image formation in a copying machine, it is necessary to be able to reproduce an original with the density gradation that is the most representative and majority of the various types of originals as described above as an image with the same density on recording paper. It is said that

また複写機は長期間にわたる稼働によって光学系に塵埃
やトナー粉の汚れを生じ原稿を照明する露光ランプの明
るさも変化するので、その結果露光量が低下して転写画
像にかぶりを起す傾向がある。そのためにも複写機は定
期的に画像濃度がチェ、りされて、必要あれば濃度調節
が行われなければならない。
Additionally, when copying machines are operated for long periods of time, dust and toner particles accumulate on the optical system, and the brightness of the exposure lamp that illuminates the original changes.As a result, the amount of exposure tends to decrease, causing fog in transferred images. . For this reason, the image density of the copying machine must be checked periodically, and the density must be adjusted if necessary.

かかる目的のために従来原稿を移動することによって光
学系の露光走査を′受けるいわゆる原稿移動型の複写機
においては、原稿載置台上の原稿画像域外に標準的な濃
度をもった基準画像板を取付け、原稿載置台の移動によ
って前記原稿と同時あるいはその直前に光学系によって
露光し、感光体上に形成した前記基準画像による潜像電
位もしくはトナー画像の濃度を検知して規定値に対する
表面電位や濃度の変動量を検出し露光量や感光体の帯電
電圧あるいは現像バイヤス電圧を制御してトナー濃度を
適正に保つ方法がとられている。以上の目的を達成する
ために特公昭57−39418号、特開昭54−619
38号、特開昭56−128977号、特開昭56−1
28964号等が既に提案されている。
For this purpose, conventional copying machines of the so-called moving original type, in which the original is exposed and scanned by an optical system by moving the original, have a reference image plate with a standard density outside the original image area on the original placing table. By attaching the document and moving the document table, the latent image potential or the density of the toner image is detected by the reference image formed on the photoconductor, which is exposed by the optical system at the same time as the document or just before that, and the surface potential and the density of the toner image relative to the specified value are detected. A method is used to maintain an appropriate toner density by detecting the amount of variation in density and controlling the exposure amount, the charging voltage of the photoreceptor, or the developing bias voltage. In order to achieve the above purpose, Japanese Patent Publication No. 57-39418, Japanese Patent Publication No. 54-619
No. 38, JP-A-56-128977, JP-A-56-1
No. 28964 and the like have already been proposed.

しかしながら前述の方法では、基準画像板取付のために
、原稿より大きくかつ原稿と一体で移動出来る可動型の
プラテンを必要とするので、固定プラテン備え、搬送ベ
ルトによって原稿を原稿載置台に搬送して光学系による
露光走査を受ける形式の複写機にあっては前記基準画像
板の取付が不可能で、また該基準画像板を前記搬送ベル
ト以外の固定した部分に設けたとすると光学系の露光走
査範囲外となって目的を達成することが出来なかったO 〔発明の目的〕 本発明は、大阪原稿の複写をも可能にした固定プラテン
をもつ原稿移動型式の複写機においても、原稿画像外に
設けた基準画像によるトナー濃度の調節を可能とした複
写機の提供を目的としたものである。
However, the method described above requires a movable platen that is larger than the original and can move together with the original in order to attach the reference image plate. In a copying machine that receives exposure scanning by an optical system, it is impossible to attach the reference image plate, and if the reference image plate is installed on a fixed part other than the conveyor belt, the exposure scanning range of the optical system O [Object of the Invention] The present invention also applies to an original moving type copying machine with a fixed platen, which also made it possible to copy Osaka manuscripts. The object of the present invention is to provide a copying machine that allows adjustment of toner density based on a reference image.

〔発明の構成〕[Structure of the invention]

本発明は固定プラテンをもつ原稿移動型式の複写機にお
いて、プラテンガラスの側方に基準画像板を取付け、原
稿面の露光走査に先立って、光学系を前記基準画像板に
臨む位置に移動して露光走査するよう構成するもので、
それは、搬送ベルトによってプラテンガラス上を搬送さ
れる原稿を、定位置に停止する光学系によって露光走査
する形式の複写機において、原稿の露光走査が行われな
い時期に前記プラテンガラス外に設けた基準画像板を、
前記光学系を移動することによって露光走査を行うこと
を特徴とする複写機。
The present invention is an original moving type copying machine having a fixed platen, in which a reference image plate is attached to the side of the platen glass, and an optical system is moved to a position facing the reference image plate prior to exposure scanning of the original surface. It is configured to perform exposure scanning,
In a copying machine that exposes and scans a document transported by a conveyor belt over a platen glass using an optical system that stops at a fixed position, it is a standard that is set outside the platen glass when the document is not exposed and scanned. image board,
A copying machine characterized in that exposure scanning is performed by moving the optical system.

〔実施例〕〔Example〕

本発明による1実施例を第1および第2図に示す。 One embodiment according to the invention is shown in FIGS. 1 and 2.

第1図は本発明による複写機のコピー可能の状態にある
断面構成の概要を示したもので、該複写機1の上部には
、固定したプラテンガラス2aとその上面に設けた左右
一対の搬送四−ラR1、R2によって時計方向に回動さ
れる搬送ベル)2bとから成る固定プラテン2が設けら
れ、さらに該固定プラテン2の左右端部の外側には送り
ローラ10 aと排出ローラ10 bが前記プラテンガ
ラス2aに臨んで設けられている。
FIG. 1 shows an outline of the cross-sectional configuration of the copying machine according to the present invention in a state where copying is possible. A fixed platen 2 is provided with a conveyor belt 2b which is rotated clockwise by four wheels R1 and R2, and a feed roller 10a and a discharge roller 10b are disposed outside the left and right ends of the fixed platen 2. is provided facing the platen glass 2a.

コピー釦を操作すると、光学系5の露光ランプ3aの点
灯と感光体ドラム6の回転および画像形成の各プロセス
の作動が開始され、それと同時に前記搬送ローラR1、
R2が始動して時計方向に回転し、プラテンガラス2a
に面した前記搬送ベル)2bが図示左方向に移動し始め
る。一方送りローラ10a、排出ローラ10bもそれぞ
れの挟着面が図示左方向に移動するよう回転を始める。
When the copy button is operated, lighting of the exposure lamp 3a of the optical system 5, rotation of the photosensitive drum 6, and operation of each image forming process are started, and at the same time, the transport roller R1,
R2 starts and rotates clockwise, and the platen glass 2a
The conveyor bell) 2b facing 1 begins to move to the left in the figure. On the other hand, the feed roller 10a and the discharge roller 10b also begin to rotate so that their respective clamping surfaces move to the left in the figure.

かかる状態にてコピーせんとする原稿を前記送りローラ
10 aの挟着面に挿入すると該原稿は固定プラテン2
に給送されたのち前記搬送ベルト2bによってプラテン
ガラス2aの上を左方に滑動して行くが、該プラテンガ
ラス2aの所定位置に設 5− 置した第1ミラーユニツト3の露光ランプ3aによって
照射され光学系5の走査を受けることとなり、それに続
く画像形成プロセスの各作用によりコピーが行われるよ
うになっている。
In this state, when the original to be copied is inserted into the clamping surface of the feed roller 10a, the original is transferred to the fixed platen 2.
After being fed to the platen glass 2a, it is slid to the left on the platen glass 2a by the conveyor belt 2b. The image is then scanned by the optical system 5, and copies are made by the subsequent actions of the image forming process.

かかる機能に加えてさらに本発明においては、前記プラ
テンガラス2aの左側端に近接した位置に基準画像板P
が下方に面した状態にて取付けてあり、かつ原稿が前記
送りローラ10 aに挿入されていないコピー前あるい
はコピー直後の段階では、第2図に示す如く光学系5に
おける前記第1ミラーユニツト3が図示の位置から前記
基準画像板Pを露光し得る位置まで左方に移動しそれに
伴なってその移動量の%に相当する量だけ第2ミラーユ
ニツト4も左方に移動した位置におかれている。
In addition to this function, the present invention further includes a reference image plate P at a position close to the left end of the platen glass 2a.
At the stage before copying or immediately after copying, when the document is mounted so as to face downward and the original is not inserted into the feed roller 10a, the first mirror unit 3 in the optical system 5 is attached as shown in FIG. is moved to the left from the illustrated position to a position where the reference image plate P can be exposed, and the second mirror unit 4 is also moved to the left by an amount corresponding to % of the amount of movement. ing.

原稿が前記送りローラ10 aに挿入された時あるいは
排出ローラ10 bから脱出した時、前記原稿の通過を
検知したセンサ(図示せず)からの信号によって前記第
1ミラーユニツト3、第2主ラー二二、ト4が前記基準
画像板Pの露光走査を開始し、同時に感光体ドラム6お
よびそれにかかわる画像 6− 形成の各プロセスが作動するので前記基準画像板Pの画
像は感光体ドラム6の周面上に静電潜像として形成され
、さらにトナー画像として可視化されて行くことになる
When a document is inserted into the feed roller 10a or when it escapes from the discharge roller 10b, the first mirror unit 3 and the second main roller are activated by a signal from a sensor (not shown) that detects the passage of the document. 22. The image on the reference image plate P starts exposure scanning of the reference image plate P, and at the same time the photoreceptor drum 6 and the associated image forming processes are operated, so that the image on the reference image plate P is It is formed as an electrostatic latent image on the peripheral surface, and is further visualized as a toner image.

なお前記基準画像板Pは標準的な原稿画像の濃度や階調
のパターンをもったもので、前記の静電潜像の電位ある
いはトナー画像の濃度を検知した結果から後続してコピ
ーされる原稿による転写画像の濃度や階調を適正な状態
に調整するための露光量や帯電電圧あるいは現像バイヤ
ス電圧等を制御出来る情報が得られるものであるが、本
実施例においては感光体ドラム6の露光面の直後に電位
計8を置いて前記静電潜像の電位を検知することによっ
て前述した原稿による転写画像の濃度調節を行う事例を
示している。
The reference image plate P has a density and gradation pattern of a standard original image, and the original to be subsequently copied is determined based on the result of detecting the potential of the electrostatic latent image or the density of the toner image. Information that can be used to control the exposure amount, charging voltage, development bias voltage, etc. in order to adjust the density and gradation of the transferred image to an appropriate state can be obtained in this embodiment. An example is shown in which the density of the transferred image from the original document is adjusted by placing an electrometer 8 immediately after the surface to detect the potential of the electrostatic latent image.

か−る基準画像板Pの第1ミラーユニツト3及びそれに
伴なう第2ミラーユニツト4による露光走査は、前記送
りローラ10 aに挿入された原稿が露光走査の位置に
達する以前に終了して、第1図に示す位置に復帰して、
その位置に停止した状態を保つようになっている。
The exposure scanning by the first mirror unit 3 and the accompanying second mirror unit 4 of the reference image plate P is completed before the document inserted into the feed roller 10a reaches the exposure scanning position. , return to the position shown in Figure 1,
It is designed to remain stopped at that position.

従って送りローラ10 aを経て搬送ベル)2bによっ
てプラテンガラス2a上を移動する原稿は、前述した如
く第1図に示す状態にて第1ミラーユニツト3による露
光と光学系5による走査を受けて転写画像が形成される
が、前記基準画像板Pの画像検知結果からのフィードバ
ックによって濃度ならびに階調の調整された転写画像を
得ることが出来る。
Therefore, the document that is moved on the platen glass 2a by the conveyor belt 2b via the feed roller 10a is exposed by the first mirror unit 3 and scanned by the optical system 5 in the state shown in FIG. An image is formed, and by feedback from the image detection result of the reference image plate P, a transferred image with adjusted density and gradation can be obtained.

〔発明の効果〕〔Effect of the invention〕

本発明は、固定プラテンによる例えばA2判等の大型の
原稿を複写することも可能にした原稿移動型の複写機に
おいても、基準画像板による画像を原稿の非画像区域に
形成することを可能とし、それによって後続してコピー
される原稿による転写画像の濃度を曹ちに調整すること
の出来る複写機が提供されること−なった。
The present invention makes it possible to form an image on a reference image plate in a non-image area of a document even in a document moving type copying machine which is also capable of copying large documents such as A2 size documents using a fixed platen. As a result, a copying machine is provided in which the density of a transferred image of a subsequently copied original can be adjusted from time to time.

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

第1図、第2図は本発明による複写機の側断面図。 1・・・複写機 2・・・固定プラテン2a・・・プラ
テンガラス 2b・・・搬送ベルト3・・・第1ミラー
ユニツト 3a・・・露光ランプ4・・・第2ミラーユ
ニ、ト 5・・・光学系6・・・感光体ドラム 7・・
・クリーニング装置8・・・電位計 9・・・現像装置 10 a・・・送りローラ 10b・・・排出ローラP
・・・基準画像板 RI 、R2・・・搬送ローラ代理
人 弁理士 野 1)義 親  9−
1 and 2 are side sectional views of a copying machine according to the present invention. 1... Copying machine 2... Fixed platen 2a... Platen glass 2b... Conveyor belt 3... First mirror unit 3a... Exposure lamp 4... Second mirror unit 5...・Optical system 6...Photosensitive drum 7...
・Cleaning device 8... Electrometer 9... Developing device 10 a... Feed roller 10b... Discharge roller P
... Reference image board RI, R2 ... Conveyance roller agent Patent attorney No. 1) Parent-in-law 9-

Claims (1)

【特許請求の範囲】[Claims] 搬送ベルトによってプラテンガラス上を搬送される原稿
を、定位置に停止する光学系によって露光走査する形式
の複ず機において、IgL槁の露光走査が行われない時
期に、前記プラテンガラス外に設けた基準画像板を、前
記光学系を移動することによって露光走査を行うことを
特徴とする複写機。
In a compound machine of the type in which an original conveyed on a platen glass by a conveyor belt is exposed and scanned by an optical system that stops at a fixed position, when the exposure scan of IgL is not performed, a device is installed outside the platen glass. A copying machine characterized in that exposure scanning is performed by moving a reference image plate through the optical system.
JP59074419A 1984-04-12 1984-04-12 Copying machine Pending JPS60216366A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59074419A JPS60216366A (en) 1984-04-12 1984-04-12 Copying machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59074419A JPS60216366A (en) 1984-04-12 1984-04-12 Copying machine

Publications (1)

Publication Number Publication Date
JPS60216366A true JPS60216366A (en) 1985-10-29

Family

ID=13546653

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59074419A Pending JPS60216366A (en) 1984-04-12 1984-04-12 Copying machine

Country Status (1)

Country Link
JP (1) JPS60216366A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62283368A (en) * 1986-05-30 1987-12-09 Konica Corp Toner concentration controller

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5363020A (en) * 1976-11-18 1978-06-06 Ricoh Co Ltd Image control method
JPS5821756A (en) * 1981-07-31 1983-02-08 Fuji Xerox Co Ltd Former for target latent image for process control in electrophotographic copying machine
JPS5887560A (en) * 1981-11-20 1983-05-25 Ricoh Co Ltd Copying machine
JPS60205436A (en) * 1984-03-29 1985-10-17 Fuji Xerox Co Ltd Control method of copying machine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5363020A (en) * 1976-11-18 1978-06-06 Ricoh Co Ltd Image control method
JPS5821756A (en) * 1981-07-31 1983-02-08 Fuji Xerox Co Ltd Former for target latent image for process control in electrophotographic copying machine
JPS5887560A (en) * 1981-11-20 1983-05-25 Ricoh Co Ltd Copying machine
JPS60205436A (en) * 1984-03-29 1985-10-17 Fuji Xerox Co Ltd Control method of copying machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62283368A (en) * 1986-05-30 1987-12-09 Konica Corp Toner concentration controller

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