JPH0876583A - Image forming device - Google Patents
Image forming deviceInfo
- Publication number
- JPH0876583A JPH0876583A JP6214810A JP21481094A JPH0876583A JP H0876583 A JPH0876583 A JP H0876583A JP 6214810 A JP6214810 A JP 6214810A JP 21481094 A JP21481094 A JP 21481094A JP H0876583 A JPH0876583 A JP H0876583A
- Authority
- JP
- Japan
- Prior art keywords
- image forming
- information
- image
- toner
- forming apparatus
- 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.)
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- Color Electrophotography (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、電子写真複写機等の画
像形成装置に関し、特に、像形成体面に静電潜像を形成
してトナーとキャリアの混合した２成分現像剤（以下、
単に現像剤とも言う）を用いる現像装置によりトナー像
に現像する画像形成装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus such as an electrophotographic copying machine, and more particularly to a two-component developer (hereinafter referred to as a two-component developer) in which an electrostatic latent image is formed on the surface of an image forming body and toner and carrier are mixed.
The present invention relates to an image forming apparatus that develops a toner image with a developing device that uses (also simply referred to as a developer).
【０００２】[0002]
【従来の技術】上述のような画像形成装置で、現像剤の
使用時間即ち新規なキャリアを用いてからの現像装置の
駆動時間に相当する情報、または画像形成装置内に設け
た湿度センサの与える相対湿度情報（以下、単に湿度情
報とも言う）の、何れか一方の情報に基づいて現像剤の
トナー濃度制御基準値を補正するようにした画像形成装
置は知られている。2. Description of the Related Art In the image forming apparatus as described above, information corresponding to the usage time of the developer, that is, the driving time of the developing apparatus after a new carrier is used, or a humidity sensor provided in the image forming apparatus is provided. An image forming apparatus is known in which the toner concentration control reference value of the developer is corrected based on one of the relative humidity information (hereinafter, also simply referred to as humidity information).
【０００３】[0003]
【発明が解決しようとする課題】上述のような従来の画
像形成装置は、トナー濃度制御基準値を補正しているに
も拘わらず現像剤のトナー濃度不足による画像濃度不足
や逆にトナー濃度過多による地かぶりあるいは細線のつ
ぶれと言った画像不良が生じ易いと言う問題があった。In the conventional image forming apparatus as described above, although the toner density control reference value is corrected, the image density is insufficient due to the insufficient toner density of the developer and, conversely, the toner density is excessive. There has been a problem that image defects such as background fogging and fine line collapse are likely to occur.
【０００４】本発明は、上述の画像形成装置の問題を解
消するためになされたものであり、安定して現像剤のト
ナー濃度が適正に保たれて、画像濃度不足や地かぶりあ
るいは細線のつぶれと言った画像不良の生ずる惧れの無
い画像形成装置の提供を目的とする。The present invention has been made in order to solve the above-mentioned problems of the image forming apparatus, and the toner density of the developer can be stably maintained properly, and the image density is insufficient, the background fog or the fine line is crushed. It is an object of the present invention to provide an image forming apparatus that is free from the risk of image defects.
【０００５】[0005]
【課題を解決するための手段】本発明は、現像剤のトナ
ー濃度制御基準値を現像剤の使用時間に対応する情報と
画像形成装置に設けた湿度センサの与える湿度情報とに
基づいて補正すると、画像濃度不足や地かぶり或いは細
線つぶれと言った画像不良が生じ無くなることを本発明
者らが見出して成されたものであり、像形成体面に静電
潜像を形成してトナーとキャリアの混合した２成分現像
剤を用いる現像装置によりトナー像に現像する画像形成
装置において、新規のキャリアが用いられたときからの
現像装置の使用時間に対応する情報と画像形成装置に設
けた湿度センサの与える相対湿度情報とに基づいて現像
装置の現像剤のトナー濃度制御基準値を補正することを
特徴とする画像形成装置にあり、この構成によって前記
目的を達成する。According to the present invention, a toner concentration control reference value of a developer is corrected based on information corresponding to a usage time of the developer and humidity information provided by a humidity sensor provided in an image forming apparatus. The present inventors have found that image defects such as insufficient image density, background fog, or thin line collapse do not occur, and an electrostatic latent image is formed on the surface of an image forming body to form toner and carrier. In an image forming apparatus that develops a toner image by a developing device that uses a mixed two-component developer, information corresponding to the usage time of the developing device from when a new carrier is used and a humidity sensor provided in the image forming device. An image forming apparatus is characterized in that the toner concentration control reference value of the developer of the developing device is corrected based on the relative humidity information provided, and the above object is achieved by this configuration.
【０００６】[0006]
【作用】すなわち、本発明の画像形成装置は、新規のキ
ャリアが用いられたときからの現像装置の使用時間に対
応する情報例えば、現像装置の駆動時間そのものや駆動
回数あるいは電子写真複写機のコピー枚数と言った情報
と、画像形成装置に設けた湿度センサの与える湿度情報
例えば、湿度センサが所定時間毎あるいは時々刻々に出
力する湿度情報の最新の情報または湿度変化が現像に影
響するには時間が掛かるから好ましくは湿度センサの最
新の出力情報とその前の１以上の時点の出力情報の新し
い情報程重みを付けた重み付け移動平均情報に基づい
て、現像装置の現像剤のトナー濃度制御基準値を補正す
るようにしているから、安定して現像剤のトナー濃度が
適正に保たれて、画像濃度不足も地かぶりや細線つぶれ
の画像不良も生じ無くなり、常に画質良好な画像を形成
することができる。That is, the image forming apparatus of the present invention is provided with the information corresponding to the usage time of the developing device from the time when the new carrier is used, for example, the driving time of the developing device itself, the number of times of driving, or the copying of the electrophotographic copying machine. The information such as the number of sheets and the humidity information provided by the humidity sensor provided in the image forming apparatus, for example, the latest information of the humidity information output by the humidity sensor at a predetermined time or every moment, or when the humidity change affects development Therefore, the toner concentration control reference value of the developer of the developing device is preferably based on the latest output information of the humidity sensor and the weighted moving average information weighted with newer information of the output information at one or more points before that. The toner density of the developer is kept stable, and the image density is not insufficient, and there is no image defect such as background fog or fine line crushing. It can always be formed a quality good image.
【０００７】[0007]
【実施例】以下、本発明を図面を参照して実施例により
説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the accompanying drawings.
【０００８】図１は本発明の画像形成装置の例を示す構
成概要図、図２及び図３は現像剤の使用時間に対応する
情報と湿度センサの湿度情報とによって定まるトナー濃
度制御基準値の補正量の例を示す補正量グラフである。FIG. 1 is a schematic configuration diagram showing an example of an image forming apparatus of the present invention, and FIGS. 2 and 3 show toner concentration control reference values determined by information corresponding to the usage time of a developer and humidity information of a humidity sensor. It is a correction amount graph which shows an example of a correction amount.
【０００９】図１の画像形成装置は、時計方向に回転す
るドラム状の像形成体１の周りにクリーニング装置２と
帯電器３とレーザビームスキャナの像露光装置４とイエ
ロー（Ｙ），マゼンタ（Ｍ），シアン（Ｃ）及び黒
（Ｂ）の色トナーをそれぞれ現像剤に用いて非接触反転
現像法で現像を行う現像装置５Ｙ，５Ｍ，５Ｃ，５Ｂと
転写器６及び分離器７を配設して、像形成体１の１回転
毎に帯電とＹ，Ｍ，ＣまたはＢのいずれかの像露光によ
る静電潜像の形成と現像装置５Ｙ，５Ｍ，５Ｃまたは５
Ｂのうちの対応する現像装置によるトナー像への現像と
を行い、像形成体１の４回転でＹ，Ｍ，Ｃ，Ｂのトナー
像の重ね合わせから成るカラー画像を形成する画像記録
装置であり、全体をマイクロコンピュータ等からなる制
御装置８によって制御される。The image forming apparatus of FIG. 1 has a cleaning device 2, a charger 3, an image exposure device 4 of a laser beam scanner, a yellow (Y), and a magenta (around the drum-shaped image forming body 1 which rotates clockwise. M), cyan (C), and black (B) color toners are used as developers, respectively, and developing devices 5Y, 5M, 5C, and 5B that perform development by a non-contact reversal developing method, a transfer device 6 and a separator 7 are arranged. Each time the image forming body 1 is rotated, charging and formation of an electrostatic latent image by image exposure of any one of Y, M, C and B and development device 5Y, 5M, 5C or 5 are performed.
An image recording apparatus that performs development on a toner image by a corresponding developing device of B and forms a color image by superposing toner images of Y, M, C, and B by four rotations of the image forming body 1. Yes, and is entirely controlled by the control device 8 including a microcomputer or the like.
【００１０】像形成体１に形成されたカラー画像は、給
紙カセット９から送出ローラ10と挟圧搬送ローラ11を介
し、または手差し送り込みローラ12と挟圧搬送ローラ11
を介して、タイミングローラ13により像形成体１に接す
るように送り込まれた記録紙に転写器６により転写され
る。そしてカラー画像を転写された記録紙は、分離器７
によって像形成体１から分離されて、サクション手段を
備えたコンベア14により定着装置15に送り込まれ、定着
装置15でカラー画像を定着されて機外に排出される。ま
た記録紙にカラー画像を転写した像形成体１の表面は、
クリーニング装置２でクリーニングされて次のカラー画
像形成工程に備えられる。The color image formed on the image forming body 1 is fed from the paper feed cassette 9 via the feed roller 10 and the nip pressure conveying roller 11, or the manual feed roller 12 and the nip pressure conveying roller 11.
It is transferred by the transfer device 6 onto the recording paper fed so as to come into contact with the image forming body 1 by the timing roller 13 via the. The recording paper on which the color image is transferred is separated by the separator 7
The image forming body 1 is separated from the image forming body 1 by a conveyer 14 having suction means, and the color image is fixed by the fixing device 15 and discharged to the outside of the apparatus. The surface of the image forming body 1 on which the color image is transferred onto the recording paper is
It is cleaned by the cleaning device 2 and is prepared for the next color image forming process.
【００１１】この画像記録装置は内部に湿度センサ16を
設置していて、制御装置８は、画像記録装置の電源スイ
ッチがオンされている間、一定時間例えば30分毎に湿度
センサ16から時間ｔの湿度情報ｈ(ｔ)を入力して、最新
の湿度情報ｈ(ｔ1)とそれより30分前の湿度情報ｈ(ｔ2)
とさらにそれより30分前の湿度情報ｈ(ｔ3)並びにそれ
らの湿度情報に付けるａ1＞ａ2＞ａ3の重み付け係数
ａ1，ａ2，ａ3とから重み付け移動平均湿度情報ｈm＝
｛ａ1ｈ(ｔ1)＋ａ2ｈ(ｔ2)＋ａ3(ｔ3)｝／(ａ1＋ａ2＋
ａ3)を現像装置５Ｙ，５Ｍ，５Ｃ，５Ｂの現像剤のトナ
ー濃度制御基準値補正のために求める。このようにｈm
を用いるようにしたのは、前にも触れたように湿度変化
が現像に影響するのに時間が掛かるからである。This image recording apparatus has a humidity sensor 16 installed therein, and the control unit 8 controls the humidity sensor 16 from the humidity sensor 16 at a time t every 30 minutes while the power switch of the image recording apparatus is turned on. Enter the humidity information h (t) for the latest humidity information h (t 1 ) and the humidity information h (t 2 ) 30 minutes before that.
Further, from the humidity information h (t 3 ) 30 minutes before that and the weighting coefficients a 1 , a 2 , a 3 of a 1 > a 2 > a 3 attached to those humidity information, the weighted moving average humidity information h m =
{A 1 h (t 1 ) + a 2 h (t 2 ) + a 3 (t 3 )} / (a 1 + a 2 +
a 3 ) is obtained for correcting the toner concentration control reference value of the developer of the developing devices 5Y, 5M, 5C and 5B. Like this h m
The reason why is used is that it takes time for the humidity change to affect the development as mentioned before.
【００１２】また制御装置８は、駆動装置51Ｙ，51Ｍ，
51Ｃ，51Ｂをして現像装置５Ｙ，５Ｍ，５Ｃ，５Ｂを駆
動させたら駆動時間または駆動回数をカウンタ52Ｙ，52
Ｍ，52Ｃ，52Ｂに現像剤のトナー濃度制御基準値補正の
ためにカウントさせる。このカウンタ52Ｙ，52Ｍ，52
Ｃ，52Ｂのカウント数ｋY，ｋM，ｋC，ｋBは新規の現像
剤が用いられたときにクリアされる。Further, the control device 8 includes drive devices 51Y, 51M,
When the developing devices 5Y, 5M, 5C and 5B are driven by 51C and 51B, the driving time or the number of times of driving is counted 52Y and 52.
M, 52C and 52B are counted to correct the toner concentration control reference value of the developer. This counter 52Y, 52M, 52
The C, 52B counts k Y , k M , k C , k B are cleared when a new developer is used.
【００１３】そして制御装置８は、カウンタ52Ｙ，52
Ｍ，52Ｃ，52Ｂのカウント数ｋY，ｋM，ｋC，ｋBが所定
の値になる毎にメモリに記憶されている重み付け移動平
均湿度情報ｈmとカウント数ｋY，ｋM，ｋC，ｋBとから
定まるトナー濃度制御基準値の補正量△ＴＣ（％）を呼
び出すと共に、トナー濃度制御基準値の初期値ＴＣ
0（％）もメモリから呼び出して、画像濃度不足や地か
ぶりあるいは細線つぶれと言った画像不良の生じないト
ナー濃度制御基準値ＴＣ（％）をＴＣ＝ＴＣ0＋△ＴＣ
によって補正し、現像装置５Ｙ，５Ｍ，５Ｃ，５Ｂの現
像剤のトナー濃度がＴＣ（％）を維持するようにトナー
補給の駆動装置53Ｙ，53Ｍ，53Ｃ，53Ｂをしてトナー補
給手段54Ｙ，54Ｍ，54Ｃ，54Ｂを駆動させる。そのため
に現像装置５Ｙ，５Ｍ，５Ｃ，５Ｂは内部に従来公知の
例えばリアクタンス変化でトナー濃度を求めるトナー濃
度センサを設けていて、駆動されるとトナー濃度センサ
からトナー濃度情報を制御装置８に出力する。このトナ
ー濃度センサの出力が前述のトナー濃度制御基準値ＴＣ
になるように制御装置８は前述のトナー補給制御を行
う。Then, the control unit 8 has counters 52Y and 52Y.
The weighted moving average humidity information h m and the count numbers k Y , k M , k stored in the memory each time the count numbers k Y , k M , k C , k B of the M, 52C, 52B become predetermined values. The correction amount ΔTC (%) of the toner density control reference value determined from C and k B is called, and the initial value TC of the toner density control reference value is set.
0 (%) is also called from the memory, and the toner density control reference value TC (%) that does not cause image defects such as insufficient image density, background fog, or fine line crushing is TC = TC 0 + ΔTC
The toner replenishment driving devices 53Y, 53M, 53C and 53B are adjusted so that the toner concentration of the developer of the developing devices 5Y, 5M, 5C and 5B is maintained at TC (%). , 54C, 54B are driven. Therefore, the developing devices 5Y, 5M, 5C, 5B are internally provided with a conventionally known toner concentration sensor for obtaining the toner concentration, for example, by reactance change, and when driven, the toner concentration sensor outputs toner concentration information to the control device 8. To do. The output of the toner density sensor is the above-mentioned toner density control reference value TC.
The control device 8 performs the toner replenishment control described above so that
【００１４】図２と図３は、湿度センサ16からの60分毎
の湿度情報ｈ(ｔ1)，ｈ(ｔ2)，ｈ(ｔ3)と重み付け係数
ａ1＝９，ａ2＝６，ａ3＝４とから前述の式によって求
めた重み付け移動平均湿度情報ｈmと、現像装置５Ｙ，
５Ｍ，５Ｃ，５Ｂの現像剤が新規のときからの使用時間
に対応する現像回数とによって定まる補正量△ＴＣ
（％）の例を示しており、図２の補正量△ＴＣ（％）は
現像装置５Ｙ，５Ｍ，５Ｃに共通用とし、図３の補正量
△ＴＣ（％）は現像装置５Ｂ用として、それぞれメモリ
に記憶されている。2 and 3 show humidity information h (t 1 ), h (t 2 ), h (t 3 ) from the humidity sensor 16 every 60 minutes and weighting coefficients a 1 = 9, a 2 = 6. , A 3 = 4, the weighted moving average humidity information h m obtained by the above equation and the developing device 5Y,
Correction amount ΔTC determined by the number of developments corresponding to the usage time from the time when the 5M, 5C and 5B developers are new
(%) Is shown as an example, the correction amount ΔTC (%) in FIG. 2 is common to the developing devices 5Y, 5M, 5C, and the correction amount ΔTC (%) in FIG. 3 is for the developing device 5B. Each is stored in memory.
【００１５】図２と図３の補正量曲線において、現像回
数０から2000程度までの間の補正量が増加しているの
は、主にトナーの粒径分布が変化するためであり、そし
て増加した補正量が減少しているのは、トナーの粒径分
布が安定して主にキャリアが変化するためである。In the correction amount curves of FIG. 2 and FIG. 3, the reason why the correction amount is increased between 0 and 2000 times of development is mainly because the toner particle size distribution is changed, and the increase is made. The reason why the correction amount is decreased is that the particle size distribution of the toner is stable and the carrier is mainly changed.
【００１６】この補正量曲線から分かるように、キャリ
アの劣化の上述の補正量変化に及ぼす影響も現像回数の
少ない初期において大きく、また雰囲気湿度が高い程ト
ナーの平均粒径等の変化の上述の補正量変化に及ぼす影
響が軽減して、キャリアの劣化の補正量変化に及ぼす影
響の大きい初期の範囲を示す現像回数が増えるようにな
り、現像回数が10000を越すと補正量は現像回数によっ
ては殆ど変わらず、雰囲気湿度によって大きく変わるよ
うになる。しかし、カーボンを着色剤としているＢトナ
ーの現像剤の場合は、現像回数10000以上で雰囲気湿度4
0％以上の補正量は殆ど変わらない。As can be seen from this correction amount curve, the influence of the carrier deterioration on the above-mentioned change in the correction amount is large at the initial stage when the number of developments is small, and the higher the ambient humidity is, the larger the change in the average particle diameter of the toner is. The influence on the change in the correction amount is reduced, and the number of times of development showing the initial range where the influence of the deterioration of the carrier on the change in the correction amount is large increases, and when the number of developments exceeds 10,000, the correction amount depends on the number of developments. Almost no change, but it changes greatly depending on the atmospheric humidity. However, in the case of the B toner developer using carbon as a colorant, the atmospheric humidity is 4 when the number of development is 10,000 or more.
The correction amount of 0% or more hardly changes.
【００１７】新規の現像剤を用いたときの現像装置５
Ｙ，５Ｍ，５Ｃ，５Ｂの画像濃度不足や地かぶりあるい
は細線つぶれと言った画像不良を起こさないトナー濃度
初期値ＴＣ0（％）も、例えば５〜10％の範囲の選択可
能である。このようなトナー濃度初期値ＴＣ0（％）と
図２，図３の補正量△ＴＣ（％）とから前述のように補
正を行ってトナー濃度をＴＣ（％）に保つように制御装
置８による制御を行った結果、安定して画像濃度不足や
地かぶり，細線つぶれと言った画像不良の無い現像を行
うことができ、画質良好な画像を形成できた。Developing device 5 when a new developer is used
The toner density initial value TC 0 (%) that does not cause image defects such as insufficient image density of Y, 5M, 5C, and 5B, background fog, or fine line crushing can also be selected within a range of 5 to 10%. The controller 8 controls the toner density initial value TC 0 (%) and the correction amount ΔTC (%) shown in FIGS. 2 and 3 as described above to maintain the toner density at TC (%). As a result of performing the control according to, it was possible to stably perform development without image defects such as insufficient image density, background fog, and fine line crushing, and it was possible to form an image with good image quality.
【００１８】本発明は上述の例に限らず、湿度情報に最
新情報だけを用いるものでも、３時点より多くの時点の
湿度情報の重み付け移動平均情報を用いるものでも、重
み付けしない単なる移動平均湿度情報を用いるもので
も、Ｙ，Ｍ，ＣとＢの現像装置に同じ補正量曲線を用い
るものでもよく、それらにおいても多少とも従来の画像
形成装置の問題を解消する本発明の効果を得ることがで
きる。また、本発明の画像形成装置はモノカラー画像形
成装置でも、スリット像露光による複写機でも、誘電体
の像形成体にマルチスタイラス電極により静電潜像を形
成するものでもよい。The present invention is not limited to the above-mentioned example, and it is possible to use only the latest information as the humidity information, to use the weighted moving average information of the humidity information at more than three points in time, or to simply move the average humidity information without weighting. May be used, or the same correction amount curve may be used for the Y, M, C and B developing devices, and even in those cases, the effect of the present invention that solves the problem of the conventional image forming apparatus can be obtained to some extent. . Further, the image forming apparatus of the present invention may be a mono-color image forming apparatus, a copying machine using slit image exposure, or an electrostatic latent image may be formed on a dielectric image forming body by a multi-stylus electrode.
【００１９】[0019]
【発明の効果】本発明の画像形成装置は、新規のキャリ
アが用いられたときからの現像装置の使用時間に対応す
る情報と、画像形成装置に設けた湿度センサの与える湿
度情報とに基づいて、現像装置の現像剤のトナー濃度制
御基準値を補正するようにしているから、安定して現像
剤のトナー濃度が適正に保たれて、画像濃度不足も地か
ぶりや細線つぶれの画像不良も生じ無くなり、常に画質
良好な画像を形成することができる。The image forming apparatus of the present invention is based on the information corresponding to the usage time of the developing device from the time when a new carrier is used and the humidity information provided by the humidity sensor provided in the image forming apparatus. Since the toner concentration control reference value of the developer of the developing device is corrected, the toner concentration of the developer is stably maintained properly, and the image density is insufficient, and the image defect such as background fog and fine line collapse occurs. It is possible to always form an image with good image quality.
【図１】本発明の画像形成装置の例を示す構成概要図で
ある。FIG. 1 is a schematic configuration diagram showing an example of an image forming apparatus of the present invention.
【図２】現像剤の使用時間に対応する情報と湿度センサ
の湿度情報とによって定まるトナー濃度制御基準値の補
正量の例を示す補正量グラフである。FIG. 2 is a correction amount graph showing an example of a correction amount of a toner density control reference value that is determined by information corresponding to a usage time of a developer and humidity information of a humidity sensor.
【図３】現像剤の使用時間に対応する情報と湿度センサ
の湿度情報とによって定まるトナー濃度制御基準値の補
正量の例を示す補正量グラフである。FIG. 3 is a correction amount graph showing an example of a correction amount of a toner density control reference value determined by information corresponding to a usage time of a developer and humidity information of a humidity sensor.
【符号の説明】 １ 像形成体 ２ クリーニング装置 ３ 帯電器 ４ 像露光装置 ５Ｙ，５Ｍ，５Ｃ，５Ｂ 現像装置 ６ 転写器 ７ 分離器 ８ 制御装置 ９ 給紙カセット 10 送出ローラ 11 挟圧搬送ローラ 12 手差し送り込みローラ 13 タイミングローラ 14 コンベア 15 定着装置 16 湿度センサ[Explanation of reference numerals] 1 image forming body 2 cleaning device 3 charging device 4 image exposure device 5Y, 5M, 5C, 5B developing device 6 transfer device 7 separator 8 control device 9 sheet feeding cassette 10 delivery roller 11 clamping pressure conveying roller 12 Manual feed roller 13 Timing roller 14 Conveyor 15 Fixing device 16 Humidity sensor
───────────────────────────────────────────────────── フロントページの続き (72)発明者 西沢 公夫 東京都八王子市石川町2970番地コニカ株式 会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kimio Nishizawa 2970 Ishikawa-cho, Hachioji-shi, Tokyo Konica Stock Company
Claims (3)
とキャリアの混合した２成分現像剤を用いる現像装置に
よりトナー像に現像する画像形成装置において、新規の
キャリアが用いられたときからの現像装置の使用時間に
対応する情報と画像形成装置に設けた湿度センサの与え
る相対湿度情報とに基づいて現像装置の前記現像剤のト
ナー濃度制御基準値を補正することを特徴とする画像形
成装置。1. When a new carrier is used in an image forming apparatus in which an electrostatic latent image is formed on the surface of an image forming body and a toner image is developed by a developing device using a two-component developer in which toner and carrier are mixed. An image characterized in that the toner concentration control reference value of the developer of the developing device is corrected based on information corresponding to the usage time of the developing device and relative humidity information provided by a humidity sensor provided in the image forming device. Forming equipment.
として現像装置の駆動回数または前記トナー像を転写、
定着された記録紙の枚数情報を用い、前記相対湿度情報
として最新情報とそれより前の時点の１以上の情報との
新しい情報ほど重みを付けた重み付け移動平均情報を用
いる請求項１に記載の画像形成装置。2. The number of times the developing device is driven or the toner image is transferred as information corresponding to the usage time of the developing device,
The number-of-records information of the fixed recording paper is used, and the weighted moving average information is used as the relative humidity information. Image forming apparatus.
２成分現像剤を用いる複数の現像装置を備えたカラー画
像形成装置であり、現像装置間で使用時間に対応する情
報と相対湿度情報とが同じでもトナー濃度制御基準値の
補正量が異なる請求項１に記載の画像形成装置。3. The image forming apparatus is a color image forming apparatus including a plurality of developing devices that use two-component developers of toners of different colors, and the information corresponding to the usage time and the relative humidity information are provided between the developing devices. The image forming apparatus according to claim 1, wherein the toner density control reference value is different in correction amount even if the same.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6214810A JPH0876583A (en) | 1994-09-08 | 1994-09-08 | Image forming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6214810A JPH0876583A (en) | 1994-09-08 | 1994-09-08 | Image forming device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0876583A true JPH0876583A (en) | 1996-03-22 |
Family
ID=16661905
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6214810A Pending JPH0876583A (en) | 1994-09-08 | 1994-09-08 | Image forming device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0876583A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6353716B1 (en) * | 1999-09-22 | 2002-03-05 | Sharp Kabushiki Kaisha | Image forming apparatus having humidity detection and toner concentration adjusting according to detected humidity |
| JP2008122466A (en) * | 2006-11-08 | 2008-05-29 | Murata Mach Ltd | Image forming apparatus and facsimile device |
-
1994
- 1994-09-08 JP JP6214810A patent/JPH0876583A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6353716B1 (en) * | 1999-09-22 | 2002-03-05 | Sharp Kabushiki Kaisha | Image forming apparatus having humidity detection and toner concentration adjusting according to detected humidity |
| JP2008122466A (en) * | 2006-11-08 | 2008-05-29 | Murata Mach Ltd | Image forming apparatus and facsimile device |
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