JPH05216252A - Production of electrophotographic sensitive body - Google Patents
Production of electrophotographic sensitive bodyInfo
- Publication number
- JPH05216252A JPH05216252A JP1773292A JP1773292A JPH05216252A JP H05216252 A JPH05216252 A JP H05216252A JP 1773292 A JP1773292 A JP 1773292A JP 1773292 A JP1773292 A JP 1773292A JP H05216252 A JPH05216252 A JP H05216252A
- Authority
- JP
- Japan
- Prior art keywords
- coating
- drum
- cylindrical
- cylindrical substrate
- cylindrial
- 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
Landscapes
- Photoreceptors In Electrophotography (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は電子写真感光体の連続塗
布方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous coating method for electrophotographic photoreceptors.
【0002】[0002]
【従来の技術】円筒状基体の筒面外側面上に感光体用塗
料を塗布し電子写真感光体を製造する塗布方法として
は、スプレー塗布法、浸漬塗布法、ブレード塗布法、ロ
ール塗布法、およびスライドホッパ塗布法などが知られ
ている。2. Description of the Related Art As a coating method for manufacturing an electrophotographic photosensitive member by coating a coating material for a photosensitive member on the outer surface of a cylindrical substrate, a spray coating method, a dip coating method, a blade coating method, a roll coating method, Also known are slide hopper coating methods and the like.
【0003】前記スプレー塗布法では、スプレーガンに
より噴出させた感光体用塗料が被塗布体の外面上に到達
する前に溶剤が蒸発するために、乾燥固化した粒子が表
面に付着し、平滑性の良い塗布表面が得られずかつ膜厚
の制御も難しい。また、ブレード塗布法およびロール塗
布法は、塗布液の粘性により均一な塗布が得られない欠
点がある。一方、浸漬塗布法は、上記の塗布表面の平滑
性、塗布膜の均一性については改良されるが、膜厚の制
御が塗布液の物性と塗布速度とに支配される。したがっ
て、塗布液の調整が非常に重要となるが、この調整は実
際的に著しく困難であり、また塗布速度も遅く生産性が
悪い欠点がある。In the above-mentioned spray coating method, since the solvent evaporates before the coating material for the photoreceptor ejected by the spray gun reaches the outer surface of the object to be coated, the dried and solidified particles adhere to the surface, resulting in smoothness. A good coating surface cannot be obtained and it is difficult to control the film thickness. Further, the blade coating method and the roll coating method have a drawback that uniform coating cannot be obtained due to the viscosity of the coating liquid. On the other hand, the dip coating method improves the smoothness of the coating surface and the uniformity of the coating film, but the control of the film thickness is governed by the physical properties of the coating liquid and the coating speed. Therefore, the adjustment of the coating liquid is very important, but this adjustment is extremely difficult in practice, and the coating speed is slow and the productivity is poor.
【0004】このような塗布法に対して、特開昭58-189
061号に代表されるいわゆるスライドホッパ方式の塗布
法は、前記の欠点がなく好適である。また、特開昭60-5
0537号には、浸漬法を改良して、環状の塗布ヘッドを用
いて塗布する装置も提案されている。For such a coating method, JP-A-58-189
The so-called slide hopper type coating method represented by No. 061 is preferable because it does not have the above-mentioned drawbacks. In addition, JP-A-60-5
No. 0537 also proposes an apparatus in which the dipping method is improved and coating is performed using an annular coating head.
【0005】かかる場合、円筒状基体の引上げには、特
開昭61-25149号記載のように、シリンダやモータにより
円筒体を支承する装置台を上昇させる方法がとられるこ
とが多い。In such a case, in order to pull up the cylindrical substrate, as described in JP-A-61-25149, a method of raising a device stand for supporting the cylindrical body by a cylinder or a motor is often used.
【0006】他方、機械工作や対象物を処理する際に、
そのワークや対象物を把持する手段として、従来、種々
の改良が加えられてきた。[0006] On the other hand, when processing a machine tool or an object,
Conventionally, various improvements have been added as means for gripping the work or the object.
【0007】この改良点の多くは、如何に対象物を安定
かつ精度よく把持するかである。横断面が円形のたとえ
ば円筒状基体に対して採用の可能性があるものとして
は、実開昭61-50687号および同62-106783号の記載のも
のを挙げることができる。Most of the improvements are how to grasp an object stably and accurately. Examples of materials that can be used for a cylindrical substrate having a circular cross section include those described in Japanese Utility Model Publication Nos. 61-50687 and 62-106783.
【0008】[0008]
【発明が解決しようとする課題】前記各公報に示された
環状の塗布ヘッドから、対象の円筒状基体の筒面外側に
感光体用塗料を塗布する場合、いかに塗布ヘッドと円筒
状基体との間隙を周方向に関し均一に保つか、および円
筒状基体の軸芯を塗布ヘッドの中芯に対していかに一致
させるかが極めて重要である。When the coating material for the photoconductor is applied to the outer surface of the cylindrical surface of the target cylindrical substrate from the annular coating heads disclosed in the above-mentioned publications, how to apply the coating head and the cylindrical substrate. It is very important to keep the gap uniform in the circumferential direction and how to align the axis of the cylindrical substrate with the center of the coating head.
【0009】すなわち、上記間隙が周方向に均一でない
と、塗布膜厚が周方向に不均一となり、電子写真特性の
むらとなって現れる。That is, if the gap is not uniform in the circumferential direction, the coating film thickness becomes non-uniform in the circumferential direction, resulting in uneven electrophotographic characteristics.
【0010】他方、円筒状基体の引上げを、特開昭61-2
5149号記載のように、シリンダやモータにより円筒状基
体を支承する載置台を上昇させ、1箇宛塗布を行うと、
塗布作業が間欠的になり、塗布膜厚の変動を来すなどの
問題を生じる。従って、円筒状基体を多数積重ね連続的
に垂直移動させることが望ましい。かかる連続移動態様
によると、一旦塗布膜厚を設定すれば、同じ塗布膜厚で
塗布を行うことが容易であるとともに、前後に時間ロス
のない連続作業によって生産性も高まる。On the other hand, the pulling up of a cylindrical substrate is described in JP-A-61-2.
As described in No. 5149, when a mounting table that supports a cylindrical substrate is raised by a cylinder or a motor and coating is applied to one piece,
The coating work becomes intermittent, which causes problems such as variations in the coating film thickness. Therefore, it is desirable that a large number of cylindrical substrates are stacked and continuously moved vertically. According to such a continuous movement mode, once the coating film thickness is set, it is easy to carry out the coating with the same coating film thickness, and the productivity is increased by the continuous operation without time loss before and after.
【0011】しかし従来規格の円筒状基体をただ積重ね
た場合には、円筒状基体の加工精度によって塗布時に基
体が揺れたり、塗布ヘッドに接触し塗膜厚不均一を生じ
ることがある。また、継目部分に段差ができ、段差部分
で塗布状態が不安定となり塗膜厚が薄くなったり、塗布
液が切れたりすることがあった。However, when the conventional cylindrical bases are simply stacked, the bases may sway during coating due to the processing accuracy of the cylindrical bases or may come into contact with the coating head to cause uneven coating film thickness. In addition, a step may be formed at the seam portion, the coating state may become unstable at the step portion, the coating film thickness may become thin, and the coating solution may be cut off.
【0012】このような円筒状基体を用いて感光体用塗
料の塗布を続けていると、塗膜厚の周方向むらや筋故障
の原因になる。周方向むらや筋故障は画像欠陥として現
れることが多く、電子写真感光体の致命的欠陥となる。If the coating of the photoconductor is continued using such a cylindrical substrate, it may cause unevenness in the coating thickness in the circumferential direction and streak failure. Circumferential unevenness and streak defects often appear as image defects, which are fatal defects of the electrophotographic photosensitive member.
【0013】[0013]
【発明の目的】そこで、本発明の主たる目的は、塗布状
態を安定させ、塗布時の液切れをなくし、膜厚プロフィ
ールの一定な感光体ドラムを大量に供給することができ
る電子写真感光体の製造方法を提供することにある。SUMMARY OF THE INVENTION Therefore, the main object of the present invention is to provide an electrophotographic photosensitive member which can stabilize a coating state, eliminate liquid shortage during coating, and supply a large amount of photosensitive drums having a constant film thickness profile. It is to provide a manufacturing method.
【0014】[0014]
【発明の構成】前記本発明の目的は;円筒状基体の筒面
外側円周を取囲んで感光体用塗料を環状に供給するスラ
イドホッパ型塗布ヘッドを用い、前記円筒状基体の端断
面を接して垂直に積重ね連続的に塗布する方法におい
て、積重ねた円筒状基体夫々の両端断面の円筒状基体の
軸芯に対する直角度が0.05mm以内であることを特徴とす
る電子写真感光体の製造方法によって達成される。SUMMARY OF THE INVENTION The object of the present invention is to use a slide hopper type coating head that surrounds the outer circumference of the cylindrical substrate and annularly supplies the coating material for the photoconductor, and uses an end cross section of the cylindrical substrate. A method for producing an electrophotographic photosensitive member, characterized in that, in a method of vertically contacting and continuously applying, the perpendicularity of each end cross section of each of the stacked cylindrical substrates to the axis of the cylindrical substrate is 0.05 mm or less. Achieved by
【0015】尚本発明の態様に於ては、円筒状基体の外
側の鏡面加工後の円筒度は0.01mm以内、外径公差は0.02
mm以内であることが好ましい。In the embodiment of the present invention, the cylindricity of the outer surface of the cylindrical substrate after mirror-finishing is 0.01 mm or less, and the outer diameter tolerance is 0.02.
It is preferably within mm.
【0016】次に本発明を図面を用いて説明する。Next, the present invention will be described with reference to the drawings.
【0017】図1は本発明のスライドホッパ型塗布ヘッ
ドを用いた塗布の態様例の概要を示す説明図である。FIG. 1 is an explanatory view showing an outline of an example of a mode of coating using the slide hopper type coating head of the present invention.
【0018】Xは円筒状基体(以後ドラムと称す)4、
図において40,41,42,43等の軸芯を合せ各端面を接して
垂直に積重ねて形成される基体円柱4′の垂直軸線であ
る。X is a cylindrical substrate (hereinafter referred to as a drum) 4,
In the figure, it is a vertical axis line of a base body cylinder 4'formed by aligning axial cores of 40, 41, 42, 43, etc. and vertically stacking them with their end faces in contact with each other.
【0019】2はドラムを前記垂直軸線にその軸芯が合
致するように供給する供給装置、21は載置台、22はドラ
ム供給部材である。Reference numeral 2 is a supply device for supplying the drum so that its axis coincides with the vertical axis, 21 is a mounting table, and 22 is a drum supply member.
【0020】1はスライドホッパ型塗布ヘッドを用いた
塗布装置、11はドラムの筒面外側円周を取囲んで感光体
用塗料(以後塗料と略称)を供給するスライドホッパ、
12は乾燥器、13,13′はドラムの押上げ部材、14,14′は
把持ハンドである。Reference numeral 1 is a coating device using a slide hopper type coating head, 11 is a slide hopper which surrounds the outer circumference of the cylindrical surface of a drum and supplies a coating material for a photoconductor (hereinafter referred to as coating material),
12 is a dryer, 13 and 13 'are push-up members for the drum, and 14 and 14' are gripping hands.
【0021】3は塗布の終ったドラムを基体円柱から取
外す取出装置である。31はドラム取出し用ハンドであ
る。Reference numeral 3 denotes a take-out device for taking out the drum after coating from the base cylinder. 31 is a hand for taking out the drum.
【0022】尚40は供給されたドラム、41は基体円柱に
組入れられた未塗布ドラム、42は塗布中のドラム、43は
塗布,乾燥されたドラムを示す。但しドラム43の取外し
にはドラム中空部を利用できるので、工程,装置の都合
によって完全乾燥に到っている必要はない。Reference numeral 40 denotes a supplied drum, 41 denotes an uncoated drum incorporated in a base cylinder, 42 denotes a drum being coated, and 43 denotes a coated and dried drum. However, since the drum hollow portion can be used for removing the drum 43, it is not necessary to completely dry the drum 43 depending on the process and the device.
【0023】図2には環状スライドホッパの態様例11の
詳細を示した。FIG. 2 shows details of Embodiment 11 of the annular slide hopper.
【0024】111はホッパの上部リング、112は下部リン
グであって、ステンレス,黄銅等の金属製であることが
好ましい。113は塗料溜、114は上部リング111と下部リ
ング112の間に形成される円錐間隙の作る塗料の供給ス
リット、115は環状流出スリット、116は上に向って開い
た円錐面をもつ円錐状スライド面、117は断面が唇状突
起をなす環状塗布ヘッドであり、ヘッド径はドラムを自
由に通しかつ塗料のドラムへの付着可能な径に調えられ
ている。Reference numeral 111 is an upper ring of the hopper, and 112 is a lower ring, which is preferably made of metal such as stainless steel or brass. 113 is a paint reservoir, 114 is a paint supply slit formed by a conical gap formed between an upper ring 111 and a lower ring 112, 115 is an annular outflow slit, and 116 is a conical slide having a conical surface that opens upward. The surface 117 is an annular coating head having a lip-shaped cross section, and the diameter of the head is adjusted so that the drum can be freely passed and the paint can be attached to the drum.
【0025】118は円錐状スライド面を流下し塗布に与
からなかった塗料の廃液溜である。Reference numeral 118 denotes a waste liquid reservoir of the coating material that has flowed down the conical slide surface and was not applied.
【0026】前記スライドホッパ型塗布ヘッドを用いた
塗布装置にかける塗料は、その粘度、比重、設定塗布
厚、塗布速度の諸元を勘案、調整し、塗料溜113から押
出され、供給スリット114内を潜り、環状流出スリット1
15から溢出して円錐状スライド面116に沿い流下し環状
塗布ヘッドからドラム42の筒面に移り塗膜5を作る。The coating material to be applied to the coating device using the slide hopper type coating head is extruded from the coating material reservoir 113 in consideration of the viscosity, specific gravity, set coating thickness and coating speed specifications, and is extruded from the coating slit 113. Diving, annular outflow slit 1
It overflows from 15 and flows down along the conical slide surface 116 to be transferred from the annular coating head to the cylindrical surface of the drum 42 to form the coating film 5.
【0027】前記の如き塗布方法においては、基体円柱
が環状塗布ヘッドのヘッド環を、安定,順調に連続通過
し、かつ塗布ヘッドからドラム側面に面積当りまた時間
当り均一に付着、塗布されるには、基体円柱の垂直軸線
がヘッド環の中心に安定に位置し、かつドラム側面と塗
布ヘッド環との距離が一定であることが必須条件とな
る。In the coating method as described above, the base cylinder can pass through the head ring of the ring-shaped coating head continuously in a stable and smooth manner, and can be evenly adhered and coated from the coating head to the side surface of the drum per area and per hour. It is essential that the vertical axis of the base cylinder is stably located at the center of the head ring and the distance between the drum side surface and the coating head ring is constant.
【0028】種々検討の結果、ドラム径の如何を問わ
ず、図3(a)に示す各ドラムの軸芯に対する直角度が
0.05mm以内であることが必要であり、0.05mmを超え、例
えば直角度が0.07mmであると塗布ヘッドに対して基体円
柱の垂直軸線の曲折が相対的に著しく、基体円柱が塗布
ヘッド環に頻繁に接触し塗布膜に支障を与え到底良好安
定な塗布が行われない。しかし0.03mmであると、任意の
順序にドラムの垂直積重ねを行っても統計的に垂直軸線
は直線と看做され、塗布ヘッド環に全く接触することが
なくなる。本発明では前記検討の結果に基づき、直角度
0.05mm以内を特定するものである。As a result of various studies, the squareness of each drum shown in FIG.
It is necessary to be within 0.05 mm, and if it exceeds 0.05 mm, for example, if the perpendicularity is 0.07 mm, the bending of the vertical axis of the base cylinder is relatively remarkable with respect to the coating head, and the base cylinder becomes the coating head ring. Frequent contact causes problems with the coating film, and extremely stable coating cannot be performed. However, if it is 0.03 mm, the vertical axis is statistically regarded as a straight line even if the vertical stacking of the drums is performed in an arbitrary order, and it does not come into contact with the coating head ring at all. In the present invention, the squareness is
It specifies within 0.05 mm.
【0029】しかしドラムの軸芯に関する直角度が充分
で基体円柱の垂直軸線位置の安定性及び直線性(非曲折
性)が保証されても、鏡面加工後のドラム外側筒面が不
良で、図3(b)に示す円筒度に0.01mmを越える面うね
りがあると、ドラムの軸方向及び円周まわりに塗布むら
を生じ易く、またドラム外径に0.02mmを越える公差(本
発明にあっては基準外径から±0.01mm)を許すと積重ね
接合部において液切れ或は逆に液瘤、液垂れを起こすこ
とがある。However, even if the perpendicularity with respect to the axial center of the drum is sufficient and the stability and linearity (non-bending) of the vertical axis position of the base cylinder are guaranteed, the cylindrical outer surface of the drum after mirror-finishing is defective. When the cylindricity shown in 3 (b) has surface waviness exceeding 0.01 mm, uneven coating is likely to occur in the axial direction and around the circumference of the drum, and the outer diameter of the drum has a tolerance of more than 0.02 mm (in the present invention, (± 0.01 mm from the standard outer diameter) may cause liquid drainage or conversely liquid drip or dripping at the stacking joint.
【0030】従って本発明の態様にあっては、円筒度0.
01mm以内、外径公差0.02mm以内とすることが好ましい。Therefore, in the embodiment of the present invention, the cylindricity is 0.
It is preferable that the inner diameter is within 01 mm and the outer diameter tolerance is within 0.02 mm.
【0031】前記本発明の構成によれば、塗布時に基体
が揺れたり、環状塗布ヘッドに衝突し塗膜厚不均一を生
じてしまうことを防止できる。また継目部分の段差を最
小限におさえることができ、塗布状態が安定し、塗膜厚
が薄くなったり、塗布液が切れたりすることがなくな
る。According to the above-mentioned constitution of the present invention, it is possible to prevent the substrate from swaying at the time of coating or colliding with the annular coating head to cause nonuniform coating film thickness. Further, the step difference at the seam portion can be suppressed to a minimum, the coating state is stable, the coating film thickness is not thinned, and the coating liquid is not cut off.
【0032】本発明において感光体用塗料としては、酸
化亜鉛や硫化カドミウム等の無機感光材料、ポリビニル
カルバゾールとトリニトロフルオレノン等の有機感光材
料を高分子バインダに分散させたものなどを用いること
ができる。また近年、高感度化、耐久性向上に有用な、
電荷発生層と電荷輸送層を積層した機能分離型感光層形
成にも用いることができる。In the present invention, as the photosensitive material coating material, an inorganic photosensitive material such as zinc oxide or cadmium sulfide, or an organic photosensitive material such as polyvinylcarbazole and trinitrofluorenone dispersed in a polymer binder can be used. .. Also, in recent years, useful for high sensitivity and durability improvement,
It can also be used for forming a function-separated photosensitive layer in which a charge generation layer and a charge transport layer are laminated.
【0033】例えば電荷発生層はアゾ顔料、キノン顔
料、ペリレン顔料、フタロシアニン顔料、アンスアンス
ロン顔料等をポリカーボネートなどの高分子バインダに
分散し、電荷輸送層は多環芳香族化合物、含窒素環式化
合物等を高分子バインダに分散して得ることができる。
電荷発生層の厚さは、0.01〜10μ好ましくは0.05〜5μ
であり、電荷輸送層の厚さは好ましくは5〜30μであ
る。感光体用塗料の粘度は0.5〜700cpの範囲で、好まし
くは1〜500cpの範囲である。For example, an azo pigment, a quinone pigment, a perylene pigment, a phthalocyanine pigment, an anthanthrone pigment and the like are dispersed in a polymer binder such as polycarbonate in the charge generation layer, and a polycyclic aromatic compound and a nitrogen-containing cyclic compound are used in the charge transport layer. Etc. can be obtained by dispersing them in a polymer binder.
The thickness of the charge generation layer is 0.01-10 μm, preferably 0.05-5 μm.
And the thickness of the charge transport layer is preferably 5 to 30 μm. The viscosity of the coating material for photoreceptor is in the range of 0.5 to 700 cp, preferably in the range of 1 to 500 cp.
【0034】また、電子写真用のドラムとしては、アル
ミニウム、ステンレス、導電層が形成されたプラスチッ
ク等がある。また、予め下引き層や電荷発生層を形成し
ておいたものでもよい。As the electrophotographic drum, there are aluminum, stainless steel, plastic having a conductive layer formed thereon, and the like. Further, an undercoat layer or a charge generation layer may be formed in advance.
【0035】[0035]
【発明の効果】本発明によれば、塗布状態を安定させ、
塗布時の液切れをなくし、膜厚プロフィールの一定なド
ラムを大量に供給することができ、画像欠陥のない電子
写真感光体を得ることができる。According to the present invention, the coating state is stabilized,
It is possible to provide a large amount of drums having a constant film thickness profile, by eliminating liquid runoff during coating, and to obtain an electrophotographic photosensitive member having no image defects.
【図1】環状スライドホッパ塗布の説明図。FIG. 1 is an explanatory diagram of coating an annular slide hopper.
【図2】環状スライドホッパの1例の態様図。FIG. 2 is a diagram illustrating an example of an annular slide hopper.
【図3】直角度、円筒度、外径公差の説明図。FIG. 3 is an explanatory diagram of squareness, cylindricity, and outer diameter tolerance.
1 環状スライドホッパ塗布装置 2 ドラム供給装置 3 ドラム取出装置 11 環状スライドホッパ 12 乾燥器 13,13′ 押上部材 14,14′ 把持ハンド 21 載置台 22 ドラム供給部材 31 ドラム取出し用ハンド 4 ドラム 4′ 基体円柱 113 塗料溜 114 供給スリット 115 環状流出スリット 116 円錐状スライド面 117 環状塗布ヘッド 118 廃液溜 X 基体円柱軸線 1 annular slide hopper coating device 2 drum supply device 3 drum take-out device 11 annular slide hopper 12 dryer 13,13 'push-up member 14,14' gripping hand 21 mounting table 22 drum supply member 31 drum take-out hand 4 drum 4 'substrate Cylinder 113 Paint reservoir 114 Supply slit 115 Annular outflow slit 116 Cone-shaped sliding surface 117 Annular coating head 118 Waste liquid reservoir X Base cylinder cylindrical axis
Claims (3)
光体用塗料を環状に供給するスライドホッパ型塗布ヘッ
ドを用い、前記円筒状基体の端断面を接して垂直に積重
ね連続的に塗布する方法において、積重ねた円筒状基体
夫々の両端断面の円筒状基体の軸芯に対する直角度が0.
05mm以内であることを特徴とする電子写真感光体の製造
方法。1. A slide hopper type coating head which surrounds the outer circumference of the cylindrical substrate and supplies the coating material for a photoreceptor in an annular shape, and vertically stacks the cylindrical substrate with its end cross-sections in contact with each other. In the method of applying to, the squareness of the cross-sections of both ends of each of the stacked cylindrical substrates with respect to the axis of the cylindrical substrate is 0.
A method for manufacturing an electrophotographic photosensitive member characterized by being within 05 mm.
の円筒度が0.01mm以内である請求項1に記載の電子写真
感光体の製造方法。2. The method for producing an electrophotographic photosensitive member according to claim 1, wherein the cylindricity of the cylindrical substrate outside the cylindrical surface after mirror-finishing is within 0.01 mm.
の外径公差が0.02mm以内である請求項1又は2に記載の
電子写真感光体の製造方法。3. The method for producing an electrophotographic photosensitive member according to claim 1, wherein the outer diameter tolerance of the outer surface of the cylindrical substrate after mirror-finishing is 0.02 mm or less.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1773292A JPH05216252A (en) | 1992-02-03 | 1992-02-03 | Production of electrophotographic sensitive body |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1773292A JPH05216252A (en) | 1992-02-03 | 1992-02-03 | Production of electrophotographic sensitive body |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH05216252A true JPH05216252A (en) | 1993-08-27 |
Family
ID=11951927
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1773292A Pending JPH05216252A (en) | 1992-02-03 | 1992-02-03 | Production of electrophotographic sensitive body |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH05216252A (en) |
-
1992
- 1992-02-03 JP JP1773292A patent/JPH05216252A/en active Pending
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