JPH03238483A - Image forming device - Google Patents
Image forming deviceInfo
- Publication number
- JPH03238483A JPH03238483A JP3369990A JP3369990A JPH03238483A JP H03238483 A JPH03238483 A JP H03238483A JP 3369990 A JP3369990 A JP 3369990A JP 3369990 A JP3369990 A JP 3369990A JP H03238483 A JPH03238483 A JP H03238483A
- Authority
- JP
- Japan
- Prior art keywords
- transfer
- transfer belt
- belt
- transfer material
- image forming
- 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
Links
- 239000000463 material Substances 0.000 claims abstract description 41
- 238000000926 separation method Methods 0.000 claims description 15
- 108091008695 photoreceptors Proteins 0.000 claims description 9
- 230000000694 effects Effects 0.000 abstract description 7
- 239000004020 conductor Substances 0.000 abstract description 2
- 230000008030 elimination Effects 0.000 abstract description 2
- 238000003379 elimination reaction Methods 0.000 abstract description 2
- 230000003247 decreasing effect Effects 0.000 abstract 2
- 239000011800 void material Substances 0.000 abstract 1
- 238000002474 experimental method Methods 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 229920000554 ionomer Polymers 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 229920002725 thermoplastic elastomer Polymers 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000011231 conductive filler Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 229920003227 poly(N-vinyl carbazole) Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 229910052711 selenium Inorganic materials 0.000 description 1
- 239000011669 selenium Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Landscapes
- Electrostatic Charge, Transfer And Separation In Electrography (AREA)
Abstract
Description
【発明の詳細な説明】
（１）発明の目的
（産業上の利用分野）
この発明は静置転写プロセスを利用する画像形成装置に
関するちのである。DETAILED DESCRIPTION OF THE INVENTION (1) Object of the Invention (Field of Industrial Application) The present invention relates to an image forming apparatus that uses a static transfer process.
（従来技術と解決すべき課題）
走行する像担持体と、これに当接して同期走行する転写
ベルトをそなえて両者の当接部を転写部位とし、該転写
ベルトに、静電的に紙などの転写材を吸着させて、これ
を前記転写部位に搬送するとともに、この位置で転写バ
イアスな印カロして像担持体ｆｌＩｌｌのトナー像を転
写材に転移させ、ついで転写材を像担持体から分離して
転写ベルトによってさらに吸看搬送した後、該転写ベル
トから転写材を不離するように構成１−た画像形成装置
がすでに提案されている。(Prior art and problems to be solved) A moving image carrier and a transfer belt running synchronously in contact with the image carrier are provided, and the contact area between the two is used as a transfer site, and paper, etc. is electrostatically applied to the transfer belt. The transfer material is attracted and conveyed to the transfer site, and at this position, a transfer bias is applied to transfer the toner image on the image carrier flIll to the transfer material, and then the transfer material is transferred from the image carrier. An image forming apparatus has already been proposed in which the transfer material is separated and further conveyed by the transfer belt, and then is not separated from the transfer belt.
このような構成の装置において、転写ベルトと、で、カ
ーボンブラックなどの導電性フィラーをＥ Ｐ Ｄ Ｍ
、ポリウレタンなどに分散させで体積抵抗を１０６Ωｃ
ｍ以下：こ調整した導電性フィルムを内側に、体積抵抗
１０”９ｃｍ以上の誘雷体フィルムを外測；こして貼着
して無端ベルト状に構成５．たちのか翔られているが、
この種の転写ベルト：よ、転写ベルト表面に転写後も残
る残留電荷を転写の都度、除霊する必要があった。In an apparatus having such a configuration, a conductive filler such as carbon black is applied to the transfer belt and
, by dispersing it in polyurethane etc. to reduce the volume resistance to 106Ωc.
m or less: The adjusted conductive film is on the inside, and the lightning dielectric film with a volume resistance of 10" or more is measured on the outside; and it is pasted to form an endless belt. 5. It is flying in the air,
This type of transfer belt: It was necessary to remove residual charges that remained on the surface of the transfer belt after each transfer after each transfer.
このような即題を解決するため、たとえば、特願昭６２
−２０３１６９号公報にみるように、転写ベルトを２層
構造とじ、内側には、導雷陛フィラーを含む（また：よ
含まない）熱可塑性エラストマーまたはアイオノマーで
、体積対抗か１０７〜ｔｏ１２Ωｃｍの半導電層を、外
側に、熱可塑性エラストマーまたはアイオノマーで体積
抵抗がｔｏ１２〜１０１６Ωｃｍの誘電体層を用いた転
写ベルト利用するちのが提案されている。In order to solve such an immediate problem, for example,
As seen in Japanese Patent No. 203169, the transfer belt has a two-layer structure, and the inside is made of a thermoplastic elastomer or ionomer containing (or not containing) a conductor filler, and has a semiconducting conductivity of 107 to 12 Ωcm in volume. It has been proposed to use a transfer belt using a dielectric layer made of thermoplastic elastomer or ionomer and having a volume resistance of to 12 to 10 16 Ωcm on the outside of the layer.
このような転写ベルトは、転写材が転写ベルトから分離
する位置に到達するまでに、残留電荷がＩＩ！ｉ滅する
ので、特段の除重手段を必要とせず、宝の効果を期待で
きる。Such a transfer belt has a residual charge of II! by the time the transfer material reaches the position where it separates from the transfer belt. Since it is completely destroyed, you can expect the effects of the treasure without the need for any special means of weight reduction.
−かしながら、実際には、電荷が消滅するまでに、高ｆ
Ａｍ境下でも２〜７秒かかるので、プロセススピードの
速い装置、スペースを大きく叢れない装置などでは電荷
の消滅不十分で、転写ベルトと転写材を分離する位置で
発生する、剥離放電による画像欠陥を確実に阻止するこ
とが出来ず、また、上前消滅までの時間が、転写材の種
類、環境、転写電圧など：こよって異り、安定した除電
機箭を期待てきかったのか実態であった。-However, in reality, it takes a high f
It takes 2 to 7 seconds even under Am conditions, so in devices with high process speeds or devices that do not occupy a large space, the charge is not sufficiently eliminated, and the image is caused by peeling discharge that occurs at the position where the transfer belt and transfer material are separated. Defects cannot be reliably prevented, and the time it takes for the top to disappear varies depending on the type of transfer material, environment, transfer voltage, etc., and the reality is whether we were expecting a stable static eliminator or not. there were.
本発明！よこのような事態に対処することを量的とする
もので、転写ベルトを使用する画像形成装置において、
該転写ベルトを、転写部位において：＝絶絶縁性を示し
、分離部位その他所窓の位置にお７）で：＝導電性を示
すようにして、特段の電荷除去王段を必要とせず、しが
ち常時安定した転写、分離を行なし＼臀るような画像形
成装置を提供することを呂的とするものである。This invention! It is quantitatively designed to deal with such situations, and in image forming apparatuses that use a transfer belt,
The transfer belt is made to exhibit insulating properties at the transfer site, and conductivity at the separation site and other locations (7), without requiring a special charge removal stage. The objective is to provide an image forming apparatus that performs stable transfer and separation at all times.
２）発明の構成
課題を解決する技術手段、その作用）
二二己の量的な達成するため、本発明は、感光体と、こ
れ：こ当接する転写ベルトとをそなえ、両者の当接部を
転写部位として、前記転写ベルトに転写寥スを吸＠搬送
して前記転写部位に至らしめて転写ｉ−た後、更に前記
転写ベルトで転写材を吸着搬ｊ′−た後、分離部位で転
写材を転写ベルトから分離する画像形成装置において、
転写ベルトの体積抵抗が転写領域において絶縁性であり
、写離領域で導電性を示すことを特徴とするものである
。2) Technical means for solving the structural problems of the invention, and their effects) In order to achieve the above-mentioned quantitative results, the present invention comprises a photoreceptor and a transfer belt that comes into contact with the photoreceptor, and a contact portion between the two is used as a transfer site, the transfer material is sucked and conveyed to the transfer belt and transferred to the transfer site, and then the transfer material is sucked and conveyed by the transfer belt, and then transferred at a separation site. In an image forming apparatus that separates a material from a transfer belt,
The transfer belt is characterized in that the volume resistance of the transfer belt is insulative in the transfer area and conductive in the separation area.
このように構成することによって、転写材を、転写ベル
トから、適宜の分離部位において確実、容易に分離する
ことが可能となり、同時に剥離放電による画質の劣化を
阻止することが出来る。With this configuration, it is possible to reliably and easily separate the transfer material from the transfer belt at an appropriate separation site, and at the same time, it is possible to prevent deterioration of image quality due to peeling discharge.
（実施例の説明）
第１図は本発明の実施例を示す画像形成装置の要部の概
略側面図である。(Description of Embodiments) FIG. 1 is a schematic side view of main parts of an image forming apparatus showing an embodiment of the present invention.
転写ベルト支持用のローラ４．４’ 、４”に懸架され
た転写ベルト２に図示矢印方向に走行↑る回転円筒状の
感光体１が当接して転写部位Ａを形成し、前記ローラ４
は導電性ローラでアース！、である。また、前記転写部
位Ａにおいて、感光体１と対向する位置には転写バイア
スを印加するための転写部材３が配設しである。A rotating cylindrical photoreceptor 1 running in the direction of the arrow shown in the figure comes into contact with the transfer belt 2 suspended by rollers 4.4' and 4'' for supporting the transfer belt to form a transfer region A, and the roller 4
is grounded with a conductive roller! , is. Further, in the transfer site A, a transfer member 3 for applying a transfer bias is disposed at a position facing the photoreceptor 1.
前記転写ベルト２はポリビニールカルバゾールなどのよ
うな光導電性材料で、厚さほぼ５０ＬＬｍのシートから
なり、感光体１と同期して図示矢印万病に走行する。The transfer belt 2 is made of a photoconductive material such as polyvinyl carbazole and has a thickness of about 50 LLm, and runs in synchronization with the photoreceptor 1 in the direction of the arrow shown in the figure.
転写材Ｐ：よ、転写ベルトの図示右方から供給されて前
記転写部位に搬送され、この部位で転写部材３によって
転写バイアスが印加され、例えば＝３Ｋｖ、よって形成
される電界の作用で、この時までに感光体１表面に静電
的に形成されているトナー像が転写材Ｐに転写される。Transfer material P: is supplied from the right side of the transfer belt in the figure and conveyed to the transfer site, where a transfer bias is applied by the transfer member 3, for example = 3 Kv, and due to the action of the electric field formed, this The toner image that has been electrostatically formed on the surface of the photoreceptor 1 by this time is transferred to the transfer material P.
転写後、転写部材３の作用で帯電した転写ベルト２に吸
着されながら、転写材Ｐはさらに図示左方に搬送されて
分離部位Ｂに至り、ここで転写ベルト２から分離して不
図示の定着部位に搬送されるちのとする。After the transfer, the transfer material P is further conveyed to the left in the figure while being attracted to the charged transfer belt 2 by the action of the transfer member 3 and reaches the separation area B, where it is separated from the transfer belt 2 and fixed (not shown). Chino will be transported to the site.
詠分離部位Ｂには、図示のように、分離部位Ｂを照射す
る光源５が配置しであるので、光導電性材料で構成され
ている転写ベルト２の当該部分の抵抗値が減衰して重荷
はアースに逃げ、該ベルトの２転写材Ｐに対する吸着作
用は急激に減少し、転写材は、剥離放雷を生ずるような
ことなく、容易に転写ベルトから分離し、トナーの飛び
散り、水玉様の転写抜けなどを発生することもない。As shown in the figure, a light source 5 for irradiating the separation area B is arranged at the separation area B, so that the resistance value of that area of the transfer belt 2 made of a photoconductive material is attenuated and the load is reduced. escapes to the ground, the adsorption effect of the belt on the second transfer material P rapidly decreases, and the transfer material easily separates from the transfer belt without causing any peeling lightning, resulting in toner scattering and water drop-like formations. There is no occurrence of transfer dropouts or the like.
第２図は他の実施態様を示すもので、この装置において
は、光透過性の転写ベルト２°を使用しており、除電用
の光源５を、図示のように、ベルト２の裏面から囮射す
るように構成しである。FIG. 2 shows another embodiment, in which a light-transmissive transfer belt 2° is used, and a light source 5 for static elimination is inserted from the back side of the belt 2 as shown in the figure. It is configured to emit light.
このような構成によっても、前記の場合と同様の効果が
得られることは直ちに理解できるであろう。It will be readily understood that with such a configuration, the same effects as in the above case can be obtained.
転写ベルトの表面電位をどの程度低下させるかは、転写
材の揃速速度、ベルトの体積抵抗値、トナーの帯電量、
環境の温湿度などによって定まるので、光源５の光量は
、これらを勘案して適宜に設定するものとする。The degree to which the surface potential of the transfer belt is lowered depends on the uniform speed of the transfer material, the volume resistance of the belt, the amount of charge on the toner,
Since it is determined by the temperature and humidity of the environment, the amount of light from the light source 5 should be set appropriately taking these factors into consideration.
実験によると、転写材Ｐの走行速度が２００ｍｍ／ｓｅ
ｃの装置において転写材Ｐと転写ベルト２の剥離放電に
よる画像の乱れを観察したところ、画像の乱れに対して
不利な、体積抵抗１０１５Ωｃｍ程度の転写紙の場合、
分離部位の表面電位＋５００Ｖ以上て画像に乱れを発生
した。According to experiments, the traveling speed of the transfer material P was 200 mm/sec.
When we observed the image disturbance due to separation discharge between the transfer material P and the transfer belt 2 in the apparatus of c, we found that in the case of a transfer paper with a volume resistance of about 1015 Ωcm, which is disadvantageous for image disturbance.
Image disturbance occurred when the surface potential of the separation site exceeded +500V.
このときのトナーの帯電量は＋１ｏＬＬｃ／ｇであった
が、＋２０００■ｇのトナーを使用したところ、表面電
位＋８００Ｖ以上で画像乱れを発生−た。The charge amount of the toner at this time was +1 oLLc/g, but when +2000 g of toner was used, image disturbance occurred at a surface potential of +800 V or more.
つぎに、転写ペル１２０表面型位を上記の程度：こする
ための、前記光源５の光量について説明すＱ〇
二記の転写ベルトは２０００Ｖｃｍ２／μＪの感ｉのも
のであり、転写時のその表面電位が＋２０００■：こな
った場合、０７５μＪ／ｃｍ２の光量を照射する画像の
乱れを抑制できた。この時の表面電崎は＋５００Ｖ、ト
ナーの帯電量は＋１０μＪ ／ｇであった。また、光源
は、ベルト材に対して・ぢ度の高いちのを使用するのが
よく、実験では６５０ｎｍのものを使用した。Next, explain the amount of light from the light source 5 for rubbing the surface pattern of the transfer pel 120 to the above degree. When the surface potential was +2000 ■, it was possible to suppress the disturbance of the image irradiated with a light amount of 075 μJ/cm 2 . At this time, the surface voltage was +500V, and the amount of charge of the toner was +10 μJ/g. In addition, it is preferable to use a light source with a high degree of strength relative to the belt material, and in the experiment, a light source with a wavelength of 650 nm was used.
基本的に二ヨ、光源は転写ヘルド、トナー、転写爽さら
に環境によって適宜のものを使用でき、また、条件に変
化によって光量、最大波長などを変化させるようにする
のが好適であり、転写ベルト表面に滑り性向上のために
０．１〜５μｍのコティングを行なってもよい。Basically, any light source can be used depending on the transfer held, toner, transfer freshener, and environment, and it is preferable to change the light intensity, maximum wavelength, etc. according to changes in conditions, and the transfer belt A coating of 0.1 to 5 μm may be applied to the surface to improve slipperiness.
転写ベルトとして、体積抵抗１０８Ωｃｍの半導体材料
からなる厚さ１１００ｕのフィルムを内側に）、、外側
にアモルファスセレンを樹脂に分散させた厚み５０ｕｍ
の感光層を外側に配置した第３図々示のような構成のも
のを使用し、トナー極性、転写電圧の極性を前記の場合
と反対極性として同様の実験を行なったところ、やはり
良好な転写、分離を行なえることを確認した。As a transfer belt, a 1100 μ thick film made of a semiconductor material with a volume resistivity of 108 Ωcm is used on the inside, and a 50 μ thick film made of amorphous selenium dispersed in resin is used on the outside.
When a similar experiment was conducted using the structure shown in Figure 3, in which the photosensitive layer was placed on the outside, and the toner polarity and the transfer voltage polarity were opposite to those in the above case, good transfer was still achieved. It was confirmed that separation could be performed.
第４図は本発明のさらに他の実施態様を示すもので、そ
の基本的構成は前記第１図に示すものと同様で、対応す
る部分には同一の荷合を付して示しである。FIG. 4 shows still another embodiment of the present invention, the basic structure of which is the same as that shown in FIG. 1, and corresponding parts are shown with the same packaging.
この装置においては、転写手段として符号３゜で示しよ
うに、帯電器をそなえている。This device is equipped with a charger as shown at 3° as a transfer means.
これによって、転写を行なうとともに、転写材を転写ベ
ルトに載置するときから、該ベルトに吸着作用を奏せし
めて、安定的に転写材を保持してこれを転写部位に搬送
出来るようにしである。As a result, when the transfer is performed and the transfer material is placed on the transfer belt, the belt has an adsorption effect, so that the transfer material can be stably held and transported to the transfer site. .
この場合には、転写ベルトの暗減衰を考慮する必要があ
り、また、帯電器の帯電線の汚染による転写禾良、さら
にオゾンの発生などを十分考慮する必要がある。In this case, it is necessary to take into account the dark decay of the transfer belt, the quality of the transfer due to contamination of the charging wire of the charger, and the generation of ozone.
（３）発明の詳細
な説明したように、本発明によるときは、像担持体と、
これに当接する転写ベルトをそなえ、両者の当接部を転
写部位として、該転写部位に、転写ベルトに転写材を載
置撤退するように構成した画像形成装置において、転写
ベルトの除電のための複雑な付帯的機構を要することな
く、転写後、適宜の分離部位において、分離時の剥離放
電の発生、これに起因するトナーの飛び敗り、転写抜け
など画質の劣化につながる現象の生ずることを確実に阻
止して、良質の画像を得るのに資すところが大である。(3) As described in detail, according to the present invention, an image carrier;
In an image forming apparatus that is equipped with a transfer belt that comes into contact with the transfer belt, the contact portion of the two is used as a transfer site, and the transfer material is placed on the transfer site and withdrawn from the transfer site. Without requiring any complicated additional mechanism, it is possible to prevent the occurrence of phenomena that lead to deterioration of image quality, such as the occurrence of peeling discharge during separation at the appropriate separation site after transfer, toner scattering due to this, and transfer omissions. This greatly contributes to reliably blocking and obtaining high-quality images.
第１図は本発明の実施態様を示す要部の概略側面図、
第２図は他の実施態様を示す要部の概略側面図、
第３図は転写ベルトの構成を示す一部の冷面図、
第４図は本発明のさらに他の実施態様を示す要部の概略
側面図である。
ｌ・・・感光体、２・・・転写ベルト、３・・・転写部
材、３° ・・・転写帯電器、４．４゜４″ ・・・支
持ローラ、５・・・除重用光源。Fig. 1 is a schematic side view of the main part showing an embodiment of the present invention, Fig. 2 is a schematic side view of the main part showing another embodiment, and Fig. 3 is a part of the cold surface showing the configuration of the transfer belt. FIG. 4 is a schematic side view of essential parts showing still another embodiment of the present invention. 1...Photoreceptor, 2...Transfer belt, 3...Transfer member, 3°...Transfer charger, 4.4°4''...Support roller, 5...Light source for weight removal.
Claims (5)
、両者の当接部を転写部位として、前記転写ベルトに転
写材を吸着搬送して前記転写部位に至らしめて転写した
後、更に前記転写ベルトで転写材を吸着搬送した後、分
離部位で転写材を転写ベルトから分離する画像形成装置
において、転写ベルトの体積抵抗が転写領域において絶
縁性であり、分離領域で導電性を示すことを特徴とする
画像形成装置。(1) A photoreceptor and a transfer belt that is in contact with the photoreceptor are provided, and the contact portion between the two is used as a transfer site, and the transfer material is adsorbed and conveyed to the transfer belt, brought to the transfer site, and transferred, and then further transferred to the transfer belt. In an image forming apparatus that separates the transfer material from the transfer belt at a separation site after the transfer material is attracted and conveyed by the transfer belt, it is known that the volume resistance of the transfer belt is insulative in the transfer area and conductive in the separation area. Features of the image forming device.
求の範囲第１項記載の画像形成装置。(2) The image forming apparatus according to claim 1, wherein the transfer belt is made of a photoconductive material.
位を照射する光源であり、その近傍にアース電極を設け
ることを特徴とする特許請求の範囲第２項記載の画像形
成装置。(3) The image forming apparatus according to claim 2, wherein the means for reducing the resistance value of the transfer belt is a light source that irradiates the separated region, and a ground electrode is provided in the vicinity of the light source.
側が光導電性物質で、反対側が中抵抗物質で構成された
特許請求の範囲第２項記載の画像形成装置。(4) The image forming apparatus according to claim 2, wherein the transfer belt has a two-layer structure, the side in contact with the transfer material is made of a photoconductive material, and the opposite side is made of a medium-resistance material.
Ωｃｍである特許請求の範囲第３項記載の画像形成装置
。(5) Volume resistance of medium resistance material is 10^7 to 10^1^2
The image forming apparatus according to claim 3, wherein the resistance is Ωcm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3369990A JPH03238483A (en) | 1990-02-16 | 1990-02-16 | Image forming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3369990A JPH03238483A (en) | 1990-02-16 | 1990-02-16 | Image forming device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03238483A true JPH03238483A (en) | 1991-10-24 |
Family
ID=12393665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3369990A Pending JPH03238483A (en) | 1990-02-16 | 1990-02-16 | Image forming device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03238483A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4324148A1 (en) * | 1992-07-17 | 1994-01-20 | Hitachi Ltd | Belt transmission unit for electrophotographic copier or printer - has system of rollers for driving endless belt made of flexible material with high electrical resistance |
| US5756982A (en) * | 1990-09-11 | 1998-05-26 | Metrologic Instruments, Inc. | Body-wearable automatic laser scanner with power-conserving control subsystem |
-
1990
- 1990-02-16 JP JP3369990A patent/JPH03238483A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5756982A (en) * | 1990-09-11 | 1998-05-26 | Metrologic Instruments, Inc. | Body-wearable automatic laser scanner with power-conserving control subsystem |
| DE4324148A1 (en) * | 1992-07-17 | 1994-01-20 | Hitachi Ltd | Belt transmission unit for electrophotographic copier or printer - has system of rollers for driving endless belt made of flexible material with high electrical resistance |
| US5499086A (en) * | 1992-07-17 | 1996-03-12 | Hitachi, Ltd. | Belt type transfer device for electrophotographic apparatus |
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