JPH0326390B2 - - Google Patents
Info
- Publication number
- JPH0326390B2 JPH0326390B2 JP56207046A JP20704681A JPH0326390B2 JP H0326390 B2 JPH0326390 B2 JP H0326390B2 JP 56207046 A JP56207046 A JP 56207046A JP 20704681 A JP20704681 A JP 20704681A JP H0326390 B2 JPH0326390 B2 JP H0326390B2
- Authority
- JP
- Japan
- Prior art keywords
- toner
- value
- copying machine
- amount
- charge
- 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 - Lifetime
Links
- 108091008695 photoreceptors Proteins 0.000 claims description 15
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000007423 decrease Effects 0.000 description 3
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/14—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base
- G03G15/16—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer
- G03G15/169—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer with means for preconditioning the toner image before the transfer
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Discharging, Photosensitive Material Shape In Electrophotography (AREA)
- Dry Development In Electrophotography (AREA)
- Control Or Security For Electrophotography (AREA)
Description
この発明は予め基準ターゲツトを感光体上に感
光した後これを現像して、そのトナー像の濃度及
び電位を検出し、得られた検出信号により複写濃
度や白地濃度がある規定値の範囲に納まるようト
ナー供給装置、現像バイアス電圧、帯電器及び露
光系などを予め設定したモードに従つて総合的に
制御するようにした電子複写機の制御方法に関す
る。
従来この種の複写機には、得られる複写の画
質、特に複写像の濃度を一定に維持するための装
置として、トナーの供給量を自動的に制御する装
置や、現像バイアス電圧を制御する装置などが採
用されている。これら装置は現像剤の透過光量や
電気抵抗、磁気抵抗等の変化を検出して、現像剤
中のトナーの含有率を自動的に一定レベルに維持
することにより画質の安定性を高めるものであ
る。しかしこれら装置には現像剤や露光ランプな
どが劣化した場合や湿度などが高くなつた場合で
もトナー含有率が一定となるよう制御するため、
逆に得られる複写の画質が低下する。特に磁気ブ
ラシ現像装置を用いた複写機ではこれらの影響を
受けやすい欠点があつた。かかる欠点を改善する
ものとして例えば特開昭55−55349号公報のもの
などが提晶されているが、この方法ではトナー濃
度のみを信号としているため、現像された濃度が
一定であつても、トナー電荷が転写に必要な電荷
量を有しているか不明なことから、次のような２
次的障害を発生する不具合がある。すなわち、一
般にこの種複写機の現像は帯電による電気的な力
と摩擦による機械的な力により行なわれる。電荷
量が多いときには現像はほとんど電気力により行
なわれるが電荷量が少なくなると電気力より機械
力が大きくなる。しかし機械的に感光体へ付着し
たトナーはほとんど用紙への転写へ寄与しない。
従つて感光体に付着したトナー量が一定であつて
も、例えばトナーの電荷量が少なくなると、用紙
へ転写するトナー量が減少して像濃度が低下する
と同時に、用紙に転写されずに感光体表面へ残留
するトナーが用紙の非画像部へ付着し、低濃度高
かぶりの複写となり、単に感光体表面のトナー濃
度を一定に制御しても、かぶりのない画像濃度の
安定した複写が得られない欠点がある。
この発明はかかる従来の制御装置の欠点を改善
する目的でなされたもので、露光帯電器の直流バ
イアス電流を、トナー像より検出したトナー濃度
及び表面電位から算出したトライボ値と、予め設
定された基準値とを比較することによつて得られ
た値で制御することにより、常に安定した画質の
複写が得られるようにした電子複写機の制御方法
を提供しようとするものである。
以下この発明の一実施例を図面を参照して詳述
する。第１図はこの発明の制御方法及び制御装置
を採用した電子複写機で、複写機本体１の上部に
図示しない原稿を載置するための原稿台２が設け
られている。原稿台２の下側には、基準ターゲツ
ト３と、原稿台２に沿つて移動する露光ランプ４
が設けられ、この露光ランプ４により原稿及び基
準ターゲツトが露光できるようになつている。原
稿または基準ターゲツト３の反射光は光学系５を
経て複写機本体１内の感光体６へ達し、感光体６
の周面に静電潜像を形成する。感光体６の静電潜
像は次の現像器７によりトナー像に現像される。
現像器７は高圧電圧が印加された現像電極８を感
光体６の周面に沿つて有しており、トナー供給装
置９より供給されたトナーを含む現像剤により上
記感光体６上の静電潜像を現像するもので、この
現像器７の上方には感光体６上に形成された基準
ターゲツト３のトナー像の濃度を検出する検出器
１０が設けられている。検出器１０は例えば発光
ダイオード及びフオトダイオードからなる反射型
濃度計１０1、及び表面電位計１０2を結合させた
もので、感光体６の非画像部に形成された基準タ
ーゲツト３のトナー像に対応するように設けられ
ており、これら検出器１０で検出された濃度信号
及び電位信号は、プロセツサ１３によりシーケン
ス制御される入力回路１２を介してマイクロコン
ピユータ装置１６へ入力され、次のようにして制
御信号が算出される。
いま複写を開始するに当つて帯電器２５により
感光体６の表面を一様に帯電すると感光体６の表
面電位は第４図に示すVsとなり、帯電後には時
間とともに減衰する（第４図参照）。次に基準タ
ーゲツト像を露光しこれを現像器７でトナー像に
現像して、トナー像の上から現像部の表面電位を
測定するとVd（Ｖ）となる。さらに感光体６を回
転させて、感光体６表面に不要像消去光源１１を
照射すると、トナー付着部の電位が消滅し、その
電位を表面電位計１０2で測定すると第４図のVt
（Ｖ）となる。
トナー電荷Qtと上記Vt（Ｖ）の間には次の関係
式が成り立つことが予め解つているので、マイク
ロコンピユータ装置１６に予めトナー電荷Qt値
を記憶させ、新たに表面電位計１０2で測定した
値Vtより次の計算式で現像されたトナーの電荷
量を計算する。
Vt＝AQ2t ……(1)
よつて
In this invention, a reference target is exposed on a photoreceptor in advance and then developed, the density and potential of the toner image are detected, and the obtained detection signal is used to determine whether the copy density or white background density falls within a certain specified value range. The present invention relates to a control method for an electronic copying machine in which a toner supply device, developing bias voltage, charger, exposure system, etc. are comprehensively controlled according to a preset mode. Conventionally, this type of copying machine has been equipped with a device that automatically controls the amount of toner supplied and a device that controls the developing bias voltage in order to maintain the image quality of the resulting copies, especially the density of the copied image, at a constant level. etc. are being adopted. These devices improve the stability of image quality by detecting changes in the amount of transmitted light, electrical resistance, magnetic resistance, etc. of the developer and automatically maintaining the toner content in the developer at a constant level. . However, these devices require control so that the toner content remains constant even when the developer or exposure lamp deteriorates or when humidity increases.
On the other hand, the quality of the resulting copy deteriorates. In particular, copying machines using magnetic brush developing devices have the drawback of being susceptible to these effects. For example, the method disclosed in Japanese Patent Application Laid-Open No. 55-55349 has been proposed to improve this drawback, but since this method uses only the toner density as a signal, even if the developed density is constant, Since it is unclear whether the toner charge has the amount of charge necessary for transfer, the following two
There is a problem that causes a secondary failure. That is, in general, development in this type of copying machine is performed using electrical force due to charging and mechanical force due to friction. When the amount of charge is large, development is mostly performed by electric force, but when the amount of charge is small, mechanical force becomes larger than electric force. However, the toner mechanically attached to the photoreceptor hardly contributes to transfer to paper.
Therefore, even if the amount of toner adhering to the photoconductor is constant, for example, if the amount of charge on the toner decreases, the amount of toner transferred to the paper will decrease, resulting in a decrease in image density. The toner remaining on the surface adheres to the non-image areas of the paper, resulting in copies with low density and high fog. Simply controlling the toner density on the photoreceptor surface to a constant level will not produce copies with stable image density and no fog. There are no drawbacks. The present invention was made with the aim of improving the drawbacks of such conventional control devices. It is an object of the present invention to provide a control method for an electronic copying machine that allows copies of stable image quality to be obtained at all times by controlling the electronic copying machine using a value obtained by comparing the present invention with a reference value. An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 shows an electronic copying machine employing the control method and control device of the present invention, in which an original table 2 (not shown) is provided on the upper part of a main body 1 of the copying machine. Below the document table 2, there is a reference target 3 and an exposure lamp 4 that moves along the document table 2.
An exposure lamp 4 is provided so that the original and the reference target can be exposed. The reflected light from the original or the reference target 3 passes through the optical system 5 and reaches the photoconductor 6 in the copying machine main body 1.
forms an electrostatic latent image on the peripheral surface of the The electrostatic latent image on the photoreceptor 6 is developed into a toner image by the next developing device 7.
The developing device 7 has a developing electrode 8 to which a high voltage is applied along the circumferential surface of the photoreceptor 6, and the electrostatic charge on the photoreceptor 6 is removed by a developer containing toner supplied from a toner supply device 9. A detector 10 is provided above the developing device 7 to detect the density of the toner image of the reference target 3 formed on the photoreceptor 6. The detector 10 is a combination of a reflection type densitometer 10 1 consisting of a light emitting diode and a photodiode, and a surface electrometer 10 2 , and detects the toner image of the reference target 3 formed on the non-image area of the photoreceptor 6. The concentration signal and potential signal detected by these detectors 10 are input to the microcomputer device 16 via the input circuit 12 which is sequence-controlled by the processor 13, and are processed as follows. A control signal is calculated. When the surface of the photoreceptor 6 is uniformly charged by the charger 25 when copying is started, the surface potential of the photoreceptor 6 becomes Vs as shown in FIG. 4, and after charging, it attenuates with time (see FIG. 4). ). Next, the reference target image is exposed and developed into a toner image by the developing device 7, and when the surface potential of the developed area is measured from above the toner image, it becomes Vd (V). When the photoconductor 6 is further rotated and the unnecessary image erasing light source 11 is irradiated onto the surface of the photoconductor 6, the potential of the toner adhesion part disappears, and when the potential is measured with a surface potentiometer 102 , Vt as shown in FIG.
(V). Since it is known in advance that the following relational expression holds between the toner charge Qt and the above-mentioned Vt (V), the toner charge Qt value is stored in the microcomputer device 16 in advance and newly measured with the surface electrometer 102. The amount of charge of the developed toner is calculated from the value Vt using the following formula. Vt=AQ 2 t...(1) Yotsute
【式】
Ａは使用するトナーにより決まる。
一方電荷量の測定と同時に反射型濃度計１０1
で測定した値Vi（Ｖ）により、現像で使用された
トナーの単位面積当りの重量を算出する。すなわ
ち反射型濃度計１０1で測定された値Vi（Ｖ）と
トナー重量Ｍmg／cm2の関係は次の式(3)で表わすこ
とができるので、これを予めマイクロコンピユー
タ装置１６へ記憶させる。
Ｍ＝Blog（１／Vi） mg／cm2………(3)
なおＢは定数
また現像剤の電荷量Qtは通常μq／ｇで表わす
ことができ、前記の値Qt及びＭから次のように
して計算することができる。
QT＝QtμC／cm2／Ｍmg／cm2
＝Qt／ＭμC／mg≡Qt×103／ＭμC／ｇ ……(4)
従つて上記式をマイクロコンピユータ装置１６
が実行することにより、現像剤の電荷量を通常扱
うトライボ値として算出することができる。マイ
クロコンピユータ装置１６で算出された値は出力
回路１４を介して各種制御回路１５へ出力され
る。各種制御回路１５は例えば現像制御回路１５
１、露光制御回路１５2、トナー供給量制御回路１
５3、現像剤撹拌機制御回路１５4、露光帯電制御
回路１５5などであつて、反射型濃度計１０1や表
面電位計１０2が検出した濃度や表面電位が基準
値を逸脱した場合に、これらの制御回路１５が適
正値となるよう帯電器２５の帯電電流１５ａや現
像器７の現像バイアス電圧１５ｂ、露光ランプ４
の光量１５ｃ、トナー供給装置９のトナー供給量
１５ｄ、現像器７内に設けられた図示しない撹拌
機構の回転数や速度１５ｅ及び露光帯電器１２の
帯電電流１５ｆが制御される。
すなわち第６図はトナー供給装置９及び露光帯
電器１２の制御動作をフローチヤートにしたもの
で、次のこのフローチヤートにより制御動作例を
説明すると、検出器１０により表面電位Vt及び
濃度Viが検出されると、これら値から上述した
操作で電荷量Qt及び現像剤の重量Ｍが夫々算出
され、さらにこれら値からトライボ値QTが算出
される。得られたトライボ値は適当な表示器で表
示されると同時に、マイクロコンピユータ装置１
６内で予め設定された電荷量と比較される。
なおトナー像の電荷量と転写効率の関係は第７
図に示す通りであつて、同じトランスフア電流の
場合トライボ値（第７図ではＴ／Ｖで示す）の低
い方が転写効率が低い。また第８図は交流電流を
一定にしたときの直流バイアスと帯電電荷量の関
係を示したもので、直流バイアスを制御すること
によりトナー像帯電量を適正値に制御可能である
ことが解る。そこで、予め設定した基準値よりト
ライボ値が高い場合は露光帯電器１２の直流バイ
アスが減少するよう帯電電流１５ｆを制御し、ま
た低い場合は直流バイアスが増加するように帯電
電流１５ｆを制御するもので、これによりトナー
像の帯電電荷量が適正値になる。すなわち上記露
光帯電器１２は現像器７と図示しない転写器の間
に位置していて交流コロトロン１２ａと除電ラン
プ１２ｂとよりなり、交流コロトロン１２ａには
直流バイアス１２ｃが印加されている。いま現像
器７により現像されたトナー像が露光帯電器１２
に達すると、交流コロトロン１２ａ，除電ランプ
１２ｂによりトナー像及び感光体６の表面電位が
除電され、同時に直流バイアス１２ｃにより帯電
される。直流バイアス１２ｃは上述したように適
正値となるように制御されていることから、露光
帯電器１２によりトナー像の帯電電荷量は最適な
ものとなる。
以上は露光帯電器１２の制御動作であるが、ト
ナー供給装置の制御動作は次のようになる。トナ
ー像濃度信号Viから現像重量Ｍが算出されると、
この値は適当な表示器に表示されると同時に、マ
イクロコンピユータ装置１６内で予め設定された
基準値と比較され、基準値より低い場合はトナー
供給装置９がオンされてトナーが供給され、また
高い場合はトナー供給装置９がオフされて、トナ
ーの供給が中止される。
この発明は以上詳述したように複写時感光体の
一部に露光現像された基準ターゲツトのトナー像
よりトナー濃度及びトナー電荷量を検出して、こ
れを予め記憶させた基準値と比較演算し、得られ
た制御信号により予め設定したモードに従つて各
種制御回路を同時または個々に制御すると同時
に、現像器及び転写器の間に設けた露光帯電器の
直流バイアス電流を制御して、現像後のトナー像
が最適な帯電電荷量となるようにしたことから、
複写機本体を設置した環境や複写機各部の経時変
化に何等影響されることなく常に安定した複写画
像が得られると共に、転写効率も著じるしく向上
する。[Formula] A is determined by the toner used. On the other hand, at the same time as measuring the amount of electric charge, the reflection type densitometer 10 1
The weight per unit area of the toner used in development is calculated from the value Vi (V) measured in . That is, since the relationship between the value Vi (V) measured by the reflection type densitometer 10 1 and the toner weight Mmg/cm 2 can be expressed by the following equation (3), this is stored in the microcomputer device 16 in advance. M=Blog(1/Vi) mg/cm 2 ......(3) Note that B is a constant. Also, the charge amount Qt of the developer can usually be expressed in μq/g, and from the above values Qt and M, it can be expressed as follows. It can be calculated as follows. Q T =QtμC/cm 2 /Mmg/cm 2 =Qt/MμC/mg≡Qt×10 3 /MμC/g ……(4) Therefore, the above formula can be expressed as
By executing this, it is possible to calculate the amount of charge of the developer as a tribo value which is normally handled. The values calculated by the microcomputer device 16 are outputted to various control circuits 15 via the output circuit 14. Various control circuits 15 include, for example, a development control circuit 15
1 , exposure control circuit 15 2 , toner supply amount control circuit 1
5 3 , developer agitator control circuit 15 4 , exposure charge control circuit 15 5 , etc., when the density or surface potential detected by the reflective densitometer 10 1 or the surface electrometer 10 2 deviates from the reference value. , the charging current 15a of the charger 25, the developing bias voltage 15b of the developing device 7, and the exposure lamp 4 so that these control circuits 15 have appropriate values.
The amount of light 15c, the amount of toner supplied by the toner supply device 9, 15d, the number of rotations and speed 15e of a stirring mechanism (not shown) provided in the developing device 7, and the charging current 15f of the exposure charger 12 are controlled. That is, FIG. 6 is a flowchart showing the control operation of the toner supply device 9 and the exposure charger 12.An example of the control operation will be explained using this flowchart below.The surface potential Vt and the density Vi are detected by the detector 10. Then, the amount of charge Qt and the weight M of the developer are calculated from these values through the operations described above, and further, the tribovalue Q T is calculated from these values. The obtained tribo value is displayed on a suitable display, and at the same time it is displayed on the microcomputer device 1.
The charge amount is compared with a preset amount of charge in 6. The relationship between the charge amount of the toner image and the transfer efficiency is the seventh
As shown in the figure, when the transfer current is the same, the lower the tribo value (indicated by T/V in FIG. 7), the lower the transfer efficiency. Further, FIG. 8 shows the relationship between the DC bias and the amount of charged charge when the AC current is kept constant, and it can be seen that by controlling the DC bias, it is possible to control the amount of charge on the toner image to an appropriate value. Therefore, when the tribo value is higher than a preset reference value, the charging current 15f is controlled so that the DC bias of the exposure charger 12 is decreased, and when it is low, the charging current 15f is controlled so that the DC bias is increased. As a result, the amount of charge on the toner image becomes an appropriate value. That is, the exposure charger 12 is located between the developing device 7 and a transfer device (not shown), and includes an AC corotron 12a and a static elimination lamp 12b, and a DC bias 12c is applied to the AC corotron 12a. The toner image now developed by the developing device 7 is transferred to the exposure charger 12.
When the voltage reaches 1, the surface potential of the toner image and the photoreceptor 6 is removed by the AC corotron 12a and the electricity removal lamp 12b, and at the same time, the surface potential of the toner image and the photoreceptor 6 is charged by the DC bias 12c. Since the DC bias 12c is controlled to have an appropriate value as described above, the amount of charge charged on the toner image by the exposure charger 12 is optimal. The above is the control operation of the exposure charger 12, but the control operation of the toner supply device is as follows. When the development weight M is calculated from the toner image density signal Vi,
This value is displayed on an appropriate display and at the same time is compared with a preset reference value in the microcomputer device 16. If it is lower than the reference value, the toner supply device 9 is turned on and toner is supplied, and If it is high, the toner supply device 9 is turned off and the supply of toner is stopped. As described in detail above, the present invention detects the toner density and toner charge amount from the toner image of the reference target exposed and developed on a part of the photoreceptor during copying, and compares and calculates this with a reference value stored in advance. The obtained control signal controls various control circuits simultaneously or individually according to a preset mode, and at the same time controls the DC bias current of the exposure charger installed between the developing device and the transfer device. Since the toner image has the optimum amount of charge,
A stable copy image can always be obtained without being affected by the environment in which the copying machine is installed or changes over time in each part of the copying machine, and the transfer efficiency is also significantly improved.
図面はこの発明の一実施例を示し、第１図は複
写機の全体的な構成図、第２図は感光体周辺の拡
大図、第３図は制御系のブロツク図、第４図は感
光体表面電位の推移を示す線図、第５図はトナー
付着量と、これを検出する反射型濃度計の出力電
圧の関係を示す線図、第６図は動作を示すフロー
チヤート、第７図はトナー像の電荷量と転写効率
の関係を示す線図、第８図は直流バイアスと帯電
電荷量の関係を示す線図である。
３は基準ターゲツト、６は感光体、７は現像
器、１２は露光帯電器、１２ａは交流コロトロ
ン、１２ｂは除電ランプ。
The drawings show one embodiment of the present invention, and Fig. 1 is an overall configuration diagram of the copying machine, Fig. 2 is an enlarged view of the area around the photoconductor, Fig. 3 is a block diagram of the control system, and Fig. 4 is the photoconductor. A diagram showing the transition of the body surface potential, Figure 5 is a diagram showing the relationship between the amount of toner adhesion and the output voltage of the reflection type densitometer that detects it, Figure 6 is a flowchart showing the operation, and Figure 7 8 is a diagram showing the relationship between the amount of charge of a toner image and transfer efficiency, and FIG. 8 is a diagram showing the relationship between the DC bias and the amount of charged charge. 3 is a reference target, 6 is a photoreceptor, 7 is a developer, 12 is an exposure charger, 12a is an AC corotron, and 12b is a static elimination lamp.
Claims (1)
３のトナー像からトナー濃度と表面電位を検出
し、この検出値の演算結果と予め設定した基準値
とを比較演算し、得られた制御信号により予め設
定したモードに従つて複写機の各制御部を同時ま
たは個々に制御する複写機において、上記複写機
の現像器７と転写器の間に直流バイアスを印加し
た露光帯電器１２を設置し、かつこの露光帯電器
１２の直流バイアス電流を、トナー像より検出し
たトナー濃度Vi及び表面電位Vtから、演算式 QT＝√Vt／Ａ／Blog（１／Vi）μC／ｇ 但し、Ａ，Ｂはそれぞれ定数 によつて、トライボ値QTを演算し、このトライ
ボ値QTを、予め設定された基準値と比較し、得
られた値により制御することを特徴とする電子複
写機の制御方法。[Scope of Claims] 1. Detecting the toner concentration and surface potential from the toner image of the reference target 3 formed on the surface of the photoreceptor 6, and comparing the calculation result of this detected value with a preset reference value, In a copying machine that controls each control section of the copying machine simultaneously or individually according to a preset mode using the obtained control signal, exposure charging is performed by applying a DC bias between the developing unit 7 and the transfer unit of the copying machine. The DC bias current of the exposure charger 12 is calculated from the toner concentration Vi detected from the toner image and the surface potential Vt using the following formula: Q T =√Vt/A/Blog(1/Vi)μC/ g However, A and B are characterized in that a tribo value Q T is calculated using a constant, this tribo value Q T is compared with a preset reference value, and control is performed using the obtained value. How to control an electronic copying machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56207046A JPS58108555A (en) | 1981-12-23 | 1981-12-23 | Controlling method of electronic copying machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56207046A JPS58108555A (en) | 1981-12-23 | 1981-12-23 | Controlling method of electronic copying machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58108555A JPS58108555A (en) | 1983-06-28 |
| JPH0326390B2 true JPH0326390B2 (en) | 1991-04-10 |
Family
ID=16533303
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56207046A Granted JPS58108555A (en) | 1981-12-23 | 1981-12-23 | Controlling method of electronic copying machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58108555A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59164563A (en) * | 1983-02-28 | 1984-09-17 | ゼロツクス・コ−ポレ−シヨン | Apparatus for determining ratio of charge of toner particle to mass |
| JPS6143773A (en) * | 1984-08-07 | 1986-03-03 | Canon Inc | Image forming device |
| JPH07120097B2 (en) * | 1986-08-20 | 1995-12-20 | 株式会社リコー | Image forming device |
| JP2637091B2 (en) * | 1987-02-20 | 1997-08-06 | 株式会社東芝 | Recording device |
| JP2532458Y2 (en) * | 1989-11-14 | 1997-04-16 | 富士ゼロックス株式会社 | Image stabilization device for image forming equipment |
| DE19709013A1 (en) * | 1996-03-05 | 1997-10-30 | Ricoh Kk | Colour toner printer |
-
1981
- 1981-12-23 JP JP56207046A patent/JPS58108555A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58108555A (en) | 1983-06-28 |
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