JPH0519500A - Electrophotographic sensitive body - Google Patents
Electrophotographic sensitive bodyInfo
- Publication number
- JPH0519500A JPH0519500A JP17239891A JP17239891A JPH0519500A JP H0519500 A JPH0519500 A JP H0519500A JP 17239891 A JP17239891 A JP 17239891A JP 17239891 A JP17239891 A JP 17239891A JP H0519500 A JPH0519500 A JP H0519500A
- Authority
- JP
- Japan
- Prior art keywords
- drum
- layer
- photosensitive
- coating
- liquid
- 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、円筒状ドラムの外周面
上に感光液を塗布した電子写真感光体に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrophotographic photoreceptor having a photosensitive drum coated on the outer peripheral surface of a cylindrical drum.
【０００２】[0002]
【従来の技術】円筒状ドラムの外周面上に感光液を塗布
して電子写真感光体を製造する方法としては、浸漬塗
布、スプレー塗布、ブレード塗布、ロール塗布等種々の
方法が採用されており、このうち前記浸漬塗布が塗布膜
表面の平滑性、塗布膜の均一性に優れるため最も一般的
に行われている。2. Description of the Related Art Various methods such as dip coating, spray coating, blade coating, and roll coating have been adopted as a method for manufacturing an electrophotographic photosensitive member by coating a photosensitive liquid on the outer peripheral surface of a cylindrical drum. Of these, the dip coating is most commonly used because of the excellent smoothness of the coating film surface and the uniformity of the coating film.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、前記浸
漬塗布方法においては、円筒ドラム内に感光液が入らな
いように、前記円筒ドラムを完全に浸漬することなく、
円筒体ドラムの上端部分を残して浸漬させるために、製
造上どうしてもドラム上端部に塗残し部分が残ってい
た。そのため、ドラム外面全体を現像部として有効に使
用することができずに、必要現像面積を確保するため
に、未塗布部分の寸法を考慮したドラム長さとしなけれ
ばならず、コストの増大または前記電子写真感光体を内
蔵するファックス、複写機等の装置自体の大型化などの
問題点があった。However, in the dip coating method, the cylindrical drum is not completely dipped so that the photosensitive liquid does not enter the cylindrical drum.
In order to immerse the cylindrical drum while leaving the upper end portion of the cylindrical drum, an unpainted portion was left on the upper end portion of the drum for manufacturing purposes. Therefore, the entire outer surface of the drum cannot be effectively used as a developing unit, and in order to secure a necessary developing area, the drum length must be set in consideration of the size of the uncoated portion, which increases cost or increases There has been a problem that the size of the apparatus itself, such as a fax machine or a copying machine having a built-in photographic photoreceptor is increased.
【０００４】また、電荷発生層および電荷輸送層とを有
する機能分離型感光体では、前記電荷発生層が非常に弱
い層であるため、この電荷発生層から剥離等が生じ、構
造的な弱点部ともなっている。Further, in the function-separated type photoreceptor having the charge generating layer and the charge transporting layer, the charge generating layer is a very weak layer, so that peeling occurs from the charge generating layer, and a structural weak point portion is formed. It is also accompanied.
【０００５】そこで、本発明の主たる課題は、第１にド
ラム端部の感光液未塗布部分を一定寸法内に抑え、もし
くは無くして感光ドラム寸法の縮小化により、コストの
低減および装置の小型化を図ること、第２に感光層の弱
点部となっている電荷発生層での剥離等を防止し延命化
を図った電子写真感光体を提供するものである。Therefore, the main object of the present invention is, firstly, to reduce the size of the photosensitive drum by suppressing or eliminating the photosensitive liquid non-coated portion at the end of the drum within a certain size, thereby reducing the cost and downsizing the apparatus. Secondly, the present invention provides an electrophotographic photoreceptor in which peeling or the like in the charge generation layer, which is a weak point portion of the photosensitive layer, is prevented to prolong the life.
【０００６】[0006]
【課題を解決するための手段】前記課題は、円筒状ドラ
ムの外周面上に感光液を塗布した電子写真感光体におい
て、前記円筒状ドラムの端部に残る感光液未塗布部分の
ドラム軸方向長さを５mm以内としたことで解決できる。In the electrophotographic photosensitive member in which the outer peripheral surface of a cylindrical drum is coated with the photosensitive liquid, the photosensitive liquid uncoated portion remaining at the end of the cylindrical drum is in the axial direction of the drum. It can be solved by keeping the length within 5 mm.
【０００７】また、円筒状ドラムの外周面上に２層以上
の感光液が積層された電子写真感光体の場合には、前記
円筒状ドラムの端部に残る感光液未塗布部分のドラム軸
方向長さが５mm以内であるとともに、重なり合う二層の
関係において、相対的に上層の縁端位置は下層縁端位置
からドラム軸方向の中央寄りに５mm以内とする。Further, in the case of an electrophotographic photosensitive member in which two or more layers of photosensitive liquid are laminated on the outer peripheral surface of the cylindrical drum, the photosensitive liquid uncoated portion remaining at the end of the cylindrical drum is in the drum axial direction. The length is within 5 mm, and the edge position of the upper layer is relatively within 5 mm from the edge position of the lower layer toward the center in the drum axial direction in the relation of the two overlapping layers.
【０００８】また、電荷発生層の剥離等を防止するため
には、電荷発生層の縁端部分を電荷輸送層で包囲するこ
とで解決できる。In order to prevent the charge generation layer from peeling off, it can be solved by surrounding the edge portion of the charge generation layer with the charge transport layer.
【０００９】[0009]
【作用】本発明においては、円筒状ドラムの端部に残る
感光液未塗布部分のドラム軸方向長さを５mm以内とする
ため、感光ドラムの寸法の縮小化により、コストの低減
および装置の小型化を図り得る。また、強度的に弱い電
荷発生層の側縁部分を強度的に強い電荷輸送層によって
包囲することにより、前記電荷発生層が現像剤、クリー
ニング部材などとの接触が無くなるとともに、剥離、損
傷等が無くなるため感光体としての耐用期間が長期化す
る。In the present invention, since the length of the photosensitive liquid uncoated portion remaining at the end of the cylindrical drum in the axial direction of the drum is within 5 mm, the size of the photosensitive drum is reduced, resulting in a reduction in cost and a compact device. Can be realized. Further, by enclosing the side edge portion of the charge generation layer, which is weak in strength, with the charge transport layer, which is strong in strength, the charge generation layer is prevented from coming into contact with the developer, the cleaning member, and the like, and peeling and damage are prevented. Since it disappears, the useful life of the photoconductor becomes longer.
【００１０】[0010]
【実施例】以下、本発明を実施例に基づき詳説する。本
発明に係る電子写真感光体を得るための塗布装置として
は、たとえば、特開昭６１−２５１４９号公報、および
特開昭５８−１８９０６１号公報などに開示された中空
ドラムの外面上に、感光液をリング状に供給する塗布装
置により連続的に塗布する塗布装置を用いることができ
る。図５は、後者の公報に係る塗布装置例を示したもの
で、１は被塗布物としての導電性中空ドラムで、これを
引き上げる過程でその外表面に、本発明に係るスライド
ホッパー型塗布装置により感光液を塗布して感光層が形
成される。EXAMPLES The present invention will be described in detail below based on examples. As a coating device for obtaining the electrophotographic photosensitive member according to the present invention, for example, a photosensitive drum can be formed on the outer surface of a hollow drum disclosed in, for example, JP-A-61-25149 and JP-A-58-189061. A coating device that continuously coats the liquid with a coating device that supplies the liquid in a ring shape can be used. FIG. 5 shows an example of a coating device according to the latter publication. Reference numeral 1 is a conductive hollow drum as an object to be coated, and a slide hopper type coating device according to the present invention on its outer surface in the process of pulling up the conductive hollow drum. Thus, the photosensitive solution is applied to form a photosensitive layer.
【００１１】前記中空ドラム１の外周にはこれを連続的
に取り囲むリング状の塗布ヘッド１０が設けられてい
る。この塗布ヘッド１０には、中空ドラム１側に開口す
る塗布液流出口１１を有する幅狭の塗布液分配スリット
１２が水平方向に形成されている。このスリット１２は
液溜ヘッダ１３に連通し、この液溜ヘッダ１３には感光
液Ｌを圧送ポンプ（図示せず）により供給管１４を介し
て供給するようになっている。他方、スリット１２の塗
布液流出口１１の下側には、連続して下窄まりに傾斜し
中空ドラム１の外寸よりやや大なる寸法で終端をなすよ
うに形成された液スライド面１５が形成されている。さ
らに、この液スライド面１５終端より下方に延びる唇状
部１６が形成されている。唇状部１６の下方には、これ
に連なる減圧室１７が形成され、減圧ポンプに連なって
いる。減圧室１７を減圧すると、唇状部１６に感光液を
確実に導くことができ、塗布性が良好となる。A ring-shaped coating head 10 is provided on the outer circumference of the hollow drum 1 so as to continuously surround the hollow drum 1. A narrow coating liquid distribution slit 12 having a coating liquid outlet 11 opening to the hollow drum 1 side is horizontally formed in the coating head 10. The slit 12 communicates with a liquid reservoir header 13, and the photosensitive liquid L is supplied to the liquid reservoir header 13 via a supply pipe 14 by a pressure feed pump (not shown). On the other hand, below the coating liquid outlet 11 of the slit 12, there is a liquid sliding surface 15 formed so as to continuously incline downward and to terminate at a dimension slightly larger than the outer dimension of the hollow drum 1. Has been formed. Further, a lip portion 16 extending downward from the end of the liquid slide surface 15 is formed. A decompression chamber 17 is formed below the lip 16 and is connected to the decompression pump. When the decompression chamber 17 is decompressed, the photosensitive liquid can be surely introduced to the lip portion 16 and the coatability is improved.
【００１２】かかる塗布装置において、中空ドラム１を
引き上げる過程で、感光液Ｌをスリット１２から押出
し、液スライド面１５に沿って流下させると、唇状部１
６に到った感光液は、その唇状部１６と中空ドラム１外
面とのクリアランスに相当する厚みをもって中空ドラム
１外面に塗布される。In such a coating apparatus, when the photosensitive liquid L is extruded from the slit 12 and flown down along the liquid slide surface 15 in the process of pulling up the hollow drum 1, the lip portion 1
The photosensitive liquid reaching 6 is applied to the outer surface of the hollow drum 1 with a thickness corresponding to the clearance between the lip 16 and the outer surface of the hollow drum 1.
【００１３】実際の塗布に際しては、前記塗布ヘッド１
０の他、中空ドラム１の端部における塗布故障を防止す
るために、後述のように、スペーサードラムを用いて感
光液の連続塗布を行うのが望ましい。すなわち、図６の
塗布工程図に示されるように、第１スペーサードラム２
１、第１中空ドラム１Ａ、第２スペーサードラム２２、
第２中空ドラム１Ｂを順に嵌合させておき、第２中空ド
ラム１Ｂの下方から第３スペーサードラム２３および第
３中空ドラム１Ｃを持込み、第３スペーサードラム２３
を第２中空ドラム１Ｂに嵌合させるとともに、第３スペ
ーサードラム２３および第３中空ドラム１Ｃを同時に上
昇させ、その上昇過程で、第１スペーサードラム２１、
第１中空ドラム１Ａ、第２スペーサードラム２２および
第２中空ドラム１Ｂ外面への感光液の塗布を行う。また
適宜の時点で、たとえば第２中空ドラム１Ｂの途中まで
塗布を行った時点で、第１スペーサードラム２１および
第１中空ドラム１Ａ除去する。塗布は連続的に、さらに
第３スペーサードラム２３および第３中空ドラム１Ｃに
対して行う。なお、塗布ヘッド１０と塗布対象物１と
は、相対的に移動すればよく、塗布ヘッド１０が移動し
てもよい。また、塗布対象物１を下降させる過程で塗布
するようにしてもよい。また、前記スペーサードラム２
１、２２、２３への感光液塗布時点において、塗布流量
を下げる制御を行えば、感光液のロスを少なくすること
ができるとともに、下側の中空ドラム１へのタレを防止
することができる。In actual coating, the coating head 1 is used.
In addition to 0, in order to prevent coating failure at the end of the hollow drum 1, it is desirable to continuously coat the photosensitive liquid using a spacer drum as described later. That is, as shown in the coating process diagram of FIG. 6, the first spacer drum 2
1, the first hollow drum 1A, the second spacer drum 22,
The second hollow drum 1B is fitted in order, and the third spacer drum 23 and the third hollow drum 1C are introduced from below the second hollow drum 1B.
While being fitted to the second hollow drum 1B, the third spacer drum 23 and the third hollow drum 1C are simultaneously raised, and in the process of rising, the first spacer drum 21,
The photosensitive liquid is applied to the outer surfaces of the first hollow drum 1A, the second spacer drum 22 and the second hollow drum 1B. The first spacer drum 21 and the first hollow drum 1A are removed at an appropriate time, for example, when the second hollow drum 1B is coated halfway. The coating is continuously performed on the third spacer drum 23 and the third hollow drum 1C. It should be noted that the coating head 10 and the coating object 1 may be moved relative to each other, and the coating head 10 may be moved. Alternatively, the application may be performed in the process of lowering the application target 1. Also, the spacer drum 2
At the time of applying the photosensitive liquid to Nos. 1, 22, and 23, if the application flow rate is controlled to be reduced, the loss of the photosensitive liquid can be reduced and the sagging on the lower hollow drum 1 can be prevented.
【００１４】かかる環状の塗布ヘッド１０を用いた塗布
を行うことにより、図１に示されるように、中空ドラム
１の端部の未塗布部分のドラム軸方向の寸法ｌを５mm以
内とすることができる。また、好ましくは前述したよう
にスペーサードラム２１、２２、２３を含め連続的に塗
布を行うか、または中空ドラム１の端部が塗布ヘッド１
０に差し掛かる少し手前で塗布を行うことにより、前記
寸法ｌを０mmとすることができる。また、図２に示され
るように、下層より下引層２Ｃ、電荷発生層２Ｂ、電荷
輸送層２Ａの三層が積層された機能分離型感光層の場合
にも同様に、未塗布部分のドラム軸方向寸法ｌを５〜０
mmとするとともに、それぞれ下層との縁端位置のズレ寸
法ｍ、ｎを同様に５〜０mmとすることができる。なお、
前記多層塗布の場合には、さらに最上層の縁端位置から
ドラムの縁端位置までの距離、図２の例ではｌ＋ｍ＋ｎ
は１５mm以内、好ましくは０mmとすることが望ましい。By performing coating using such an annular coating head 10, as shown in FIG. 1, the dimension l of the uncoated portion at the end of the hollow drum 1 in the axial direction of the drum can be kept within 5 mm. it can. Further, preferably, the coating is continuously performed including the spacer drums 21, 22, and 23 as described above, or the end of the hollow drum 1 is coated with the coating head 1.
By applying a little before approaching 0, the dimension 1 can be made 0 mm. Further, as shown in FIG. 2, in the case of a function-separated type photosensitive layer in which three layers of a subbing layer 2C, a charge generation layer 2B, and a charge transport layer 2A are laminated from a lower layer, the drum of the uncoated portion is similarly subjected. Axial dimension l is 5 to 0
In addition to mm, the misalignment dimensions m and n at the edge position with the lower layer can be similarly set to 5 to 0 mm. In addition,
In the case of the multi-layer coating, further, the distance from the edge position of the uppermost layer to the edge position of the drum, l + m + n in the example of FIG.
Is 15 mm or less, preferably 0 mm.
【００１５】一方、図３に示されるように、電荷発生層
２Ｂ、電荷輸送層２Ａの二層が積層された機能分離型感
光層の場合に、弱い電荷発生層２Ｂの縁端部を表層の強
度的に強い電荷輸送２Ａで包囲することによって、弱い
電荷発生層２Ｂの損傷、剥離等を防止することができ
る。かかる場合の塗布要領は、図６に示される中空ドラ
ム１Ａ〜１Ｃの上下移動の過程において、塗布ヘッド１
１から塗布液流出を制御して各塗布層の縁端位置をコン
トロールすることによって容易にかかる断面形状の塗布
層を構成することができる。なお、係る断面構成の場合
にも未塗布部分の寸法ｌは５〜０mmであることが望まし
いが、電荷発生層２Ｂの保護を主目的とするのであれ
ば、浸漬塗布によっても、かかる断面形状とすることが
できる。すなわち、電荷発生層２Ｂを塗布する際に浸漬
液位を少し浅めにして浸漬を行った後、その上層の電荷
輸送層２Ａを浸漬塗布する際に前記電荷発生層２Ｂ部分
を完全に浸漬させることによって前記電荷発生層２Ｂを
電荷輸送層２Ａによって包囲することができる。また、
図４に示されるように、最下層に下引層２Ｃを加えた三
層構成の場合にも、同様の塗布方法により、弱い電荷発
生層２Ｂの縁端部を表層の強度的に強い電荷輸送２Ａで
包囲することができる。On the other hand, as shown in FIG. 3, in the case of a function-separated type photosensitive layer in which two layers of the charge generation layer 2B and the charge transport layer 2A are laminated, the edge portion of the weak charge generation layer 2B is the surface layer. By surrounding the charge transport layer 2A with strong strength, it is possible to prevent the weak charge generation layer 2B from being damaged or peeled off. In this case, the application procedure is such that the application of the application head 1 in the process of vertical movement of the hollow drums 1A to 1C shown in FIG.
By controlling the outflow of the coating liquid from 1 to control the edge position of each coating layer, it is possible to easily form the coating layer having such a cross-sectional shape. Even in the case of such a cross-sectional structure, it is desirable that the dimension l of the uncoated portion is 5 to 0 mm, but if the main purpose is to protect the charge generation layer 2B, even if dip coating is applied, the cross-sectional shape can do. That is, when the charge generation layer 2B is applied, the immersion liquid is made slightly shallower, and then the charge transport layer 2A, which is the upper layer, is completely immersed in the charge generation layer 2B. The charge generation layer 2B can be surrounded by the charge transport layer 2A. Also,
As shown in FIG. 4, also in the case of a three-layer structure in which the undercoat layer 2C is added to the lowermost layer, the edge portion of the weak charge generation layer 2B is transported by the same coating method as the surface layer with strong charge transport. It can be surrounded by 2A.
【００１６】ところで、本発明において用いられる感光
液としては、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ン等
の有機感光材料を高分子バインダーに分散させたものを
用いることができる。また、機能分離側感光層の場合、
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ーに分散して得ることが
できる。また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ーに分散して得ることがで
きる。By the way, as the photosensitive solution used in the present invention, an inorganic photosensitive material such as zinc oxide or cadmium sulfide, or an organic photosensitive material such as polyvinylcarbazole and trinitrofluorene dispersed in a polymer binder is used. it can. In the case of the photosensitive layer on the function separation side,
The charge generation layer can be obtained by dispersing an azo pigment, a quinone pigment, a perylene pigment, a phthalocyanine pigment, an anthanthrone pigment or the like in a polymer binder such as polycarbonate. The charge transport layer can be obtained by dispersing a polycyclic aromatic compound, a nitrogen-containing cyclic compound or the like in a polymer binder.
【００１７】電荷発生層の厚さは、0.01〜１μ好ましく
は0.05〜0.５μであり、電荷輸送層の厚さは好ましくは
５〜20μである。感光液の粘度は0.５〜 700cpの範囲
で、好ましくは１〜 500cpの範囲である。The thickness of the charge generation layer is 0.01 to 1 μ, preferably 0.05 to 0.5 μ, and the thickness of the charge transport layer is preferably 5 to 20 μ. The viscosity of the photosensitive liquid is in the range of 0.5 to 700 cp, preferably in the range of 1 to 500 cp.
【００１８】また、下引層２Ｃとしては、カゼイン、ポ
リビニルアルコール、ニトロセルロース、エチレン−ア
クリル酸コポリマー、ポリアミド（ナイロン６、ナイロ
ン６６、ナイロン６１０、共重合ナイロン、アルコキシ
メチル化ナイロンなど）、ポリウレタン、ゼラチン、酸
化アルミニウムなどを用いることができる。前記下引層
２Ｃの厚さは、0.１〜５μ好ましくは0.３〜３μの範囲
が適当とされる。As the undercoat layer 2C, casein, polyvinyl alcohol, nitrocellulose, ethylene-acrylic acid copolymer, polyamide (nylon 6, nylon 66, nylon 610, copolymerized nylon, alkoxymethylated nylon, etc.), polyurethane, Gelatin, aluminum oxide, etc. can be used. The thickness of the subbing layer 2C is appropriately in the range of 0.1 to 5 μ, preferably 0.3 to 3 μ.
【００１９】なお、本発明に用いる円筒形状の被塗布物
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を用いることができる。As the cylindrical object to be coated in the present invention, aluminum, stainless steel, plastic having a conductive layer formed thereon, or the like can be used.
【００２０】[0020]
【発明の効果】以上のように、本発明によれば、ドラム
端部の感光液未塗布部分を一定寸法内に抑え、または未
塗布部分を無くすことによる感光ドラム寸法の縮小化に
より、コストの低減および装置の小型化を図ることがで
きる。また感光層の縁端部において電荷輸送層が電荷発
生層を包囲することにより電荷発生層での損傷、剥離等
を防止することができる。As described above, according to the present invention, the size of the photosensitive drum is reduced by suppressing the uncoated portion of the drum end portion within a certain size or eliminating the uncoated portion. Reduction and downsizing of the device can be achieved. Further, since the charge transport layer surrounds the charge generation layer at the edge of the photosensitive layer, it is possible to prevent the charge generation layer from being damaged or peeled off.
【図１】本発明に係る一層構成の場合の電子写真感光体
の縦断面図である。FIG. 1 is a vertical cross-sectional view of an electrophotographic photosensitive member having a single-layer structure according to the present invention.
【図２】本発明に係る三層構成の場合の電子写真感光体
の縦断面図である。FIG. 2 is a vertical sectional view of an electrophotographic photosensitive member having a three-layer structure according to the present invention.
【図３】本発明に係る二層構成の場合の電子写真感光体
の縦断面図である。FIG. 3 is a vertical sectional view of an electrophotographic photosensitive member having a two-layer structure according to the present invention.
【図４】本発明に係る三層構成の場合の電子写真感光体
の縦断面図である。FIG. 4 is a longitudinal sectional view of an electrophotographic photosensitive member having a three-layer structure according to the present invention.
【図５】環状の塗布装置の縦断面図である。FIG. 5 is a vertical cross-sectional view of an annular coating device.
【図６】塗布工程を順に示す概要図である。FIG. 6 is a schematic view showing the coating steps in order.
１、１Ａ、１Ｂ、１Ｃ…中空ドラム、１０…塗布ヘッド
１１…塗布液流出口１２…スリット、１５…液スライ
ド面、１６…唇状部、２１、２２、２３…スペーサード
ラム、Ｌ…感光液1, 1A, 1B, 1C ... Hollow drum, 10 ... Coating head 11 ... Coating liquid outlet 12 ... Slit, 15 ... Liquid slide surface, 16 ... Lip, 21, 22, 23 ... Spacer drum, L ... Photosensitive liquid
───────────────────────────────────────────────────── フロントページの続き (72)発明者 工藤 浩一 東京都八王子市石川町2970番地 コニカ株 式会社内 (72)発明者 小林 信昭 東京都八王子市石川町2970番地 コニカ株 式会社内 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Koichi Kudo 2970 Ishikawa-cho, Hachioji-shi, Tokyo Konica stock Inside the company (72) Inventor Nobuaki Kobayashi 2970 Ishikawa-cho, Hachioji-shi, Tokyo Konica stock Inside the company
Claims (3)
た電子写真感光体において、 前記円筒状ドラムの端部に残る感光液未塗布部分のドラ
ム軸方向長さが５mm以内であることを特徴とする電子写
真感光体。1. An electrophotographic photosensitive member in which a photosensitive liquid is applied to the outer peripheral surface of a cylindrical drum, and the length of the unexposed portion of the photosensitive liquid remaining at the end of the cylindrical drum in the axial direction of the drum is 5 mm or less. An electrophotographic photoreceptor characterized by:
液が積層された電子写真感光体において、 前記円筒状ドラムの端部に残る感光液未塗布部分のドラ
ム軸方向長さが５mm以内であるとともに、重なり合う上
下二層の関係において、相対的に上層の縁端位置は下層
縁端位置からドラム軸方向の中央寄りに５mm以内である
ことを特徴とする電子写真感光体。2. An electrophotographic photosensitive member in which two or more layers of photosensitive liquid are laminated on the outer peripheral surface of a cylindrical drum, and the length of the photosensitive liquid uncoated portion remaining at the end of the cylindrical drum in the axial direction of the drum. An electrophotographic photosensitive member characterized by being within 5 mm and having a relative upper and lower layer edge position within 5 mm from the lower layer edge position toward the center in the axial direction of the drum.
の上層に電荷輸送層とが積層された電子写真感光体にお
いて、 前記電荷発生層の縁端部分を電荷輸送層で包囲したこと
を特徴とする電子写真感光体。3. An electrophotographic photosensitive member comprising a cylindrical drum having an outer peripheral surface on which a charge generating layer and an electric charge transporting layer formed thereon are laminated, and an edge portion of the charge generating layer is surrounded by the charge transporting layer. An electrophotographic photoreceptor characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17239891A JPH0519500A (en) | 1991-07-12 | 1991-07-12 | Electrophotographic sensitive body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17239891A JPH0519500A (en) | 1991-07-12 | 1991-07-12 | Electrophotographic sensitive body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0519500A true JPH0519500A (en) | 1993-01-29 |
Family
ID=15941204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17239891A Pending JPH0519500A (en) | 1991-07-12 | 1991-07-12 | Electrophotographic sensitive body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0519500A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0670526A2 (en) * | 1994-03-02 | 1995-09-06 | Canon Kabushiki Kaisha | Electrophotographic apparatus, process cartridge and phototsensitive member |
| US7642026B2 (en) * | 2006-09-20 | 2010-01-05 | Fuji Xerox Co., Ltd. | Electrophotographic photoreceptor, method of producing the same, process cartridge, and image-forming apparatus |
| US7642025B2 (en) | 2006-09-20 | 2010-01-05 | Fuji Xerox Co., Ltd. | Electrophotographic photoreceptor, method of producing the same, process cartridge, and image-forming apparatus |
| JP2014182198A (en) * | 2013-03-18 | 2014-09-29 | Mitsubishi Chemicals Corp | Electrophotographic photoreceptor, manufacturing method of electrophotographic photoreceptor, and image forming apparatus |
| JP2017142369A (en) * | 2016-02-10 | 2017-08-17 | キヤノン株式会社 | Electrophotographic device and process cartridge |
-
1991
- 1991-07-12 JP JP17239891A patent/JPH0519500A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0670526A2 (en) * | 1994-03-02 | 1995-09-06 | Canon Kabushiki Kaisha | Electrophotographic apparatus, process cartridge and phototsensitive member |
| US7642026B2 (en) * | 2006-09-20 | 2010-01-05 | Fuji Xerox Co., Ltd. | Electrophotographic photoreceptor, method of producing the same, process cartridge, and image-forming apparatus |
| US7642025B2 (en) | 2006-09-20 | 2010-01-05 | Fuji Xerox Co., Ltd. | Electrophotographic photoreceptor, method of producing the same, process cartridge, and image-forming apparatus |
| JP2014182198A (en) * | 2013-03-18 | 2014-09-29 | Mitsubishi Chemicals Corp | Electrophotographic photoreceptor, manufacturing method of electrophotographic photoreceptor, and image forming apparatus |
| JP2017142369A (en) * | 2016-02-10 | 2017-08-17 | キヤノン株式会社 | Electrophotographic device and process cartridge |
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