JPS60238837A - Coating method of electrophotographic sensitive body - Google Patents

Coating method of electrophotographic sensitive body

Info

Publication number
JPS60238837A
JPS60238837A JP9536184A JP9536184A JPS60238837A JP S60238837 A JPS60238837 A JP S60238837A JP 9536184 A JP9536184 A JP 9536184A JP 9536184 A JP9536184 A JP 9536184A JP S60238837 A JPS60238837 A JP S60238837A
Authority
JP
Japan
Prior art keywords
coating
liquid
cylindrical support
base
coating method
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
Application number
JP9536184A
Other languages
Japanese (ja)
Inventor
Masayuki Suwa
諏訪　正幸
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP9536184A priority Critical patent/JPS60238837A/en
Publication of JPS60238837A publication Critical patent/JPS60238837A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G5/00—Recording members for original recording by exposure, e.g. to light, to heat, to electrons; Manufacture thereof; Selection of materials therefor
    • G03G5/02—Charge-receiving layers
    • G03G5/04—Photoconductive layers; Charge-generation layers or charge-transporting layers; Additives therefor; Binders therefor
    • G03G5/05—Organic bonding materials; Methods for coating a substrate with a photoconductive layer; Inert supplements for use in photoconductive layers
    • G03G5/0525—Coating methods

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Photoreceptors In Electrophotography (AREA)

Abstract

PURPOSE:To obtain a uniformly coated film while lessening fluctuation of a liquid level and preventing foaming by immersing a cylinder which is open at both ends into a coating liquid contg. a photoconductive compd. and coating simultaneously said liquid on the inside and outside surface of the cylinder. CONSTITUTION:The coating liquid 2 contg. the photoconductive compd. is injected into a coating device 1. A cylindrical base 3 with both ends opened is supported internally by a supporting member 6 and is lowered and immersed into the liquid 2 so that the liquid 2 is coated simultaneously on the inside and outside surface of the base 3. The fluctuation of the surface of the liquid 2 is thus limited only to the volume corresponding to the wall thickness of the base 3 and is thereby lessened. Foaming is prevented as well. The easy coating of the paint to the base 3 with good working efficiency is thus made possible.

Description

【発明の詳細な説明】 筑４北夏 本発明は、電子写真感光層を円筒状支持体の表面に均一
に、且つ平滑に形成する電子裏写感光体の塗布方法に関
するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a coating method for an electrophotographic photoreceptor in which an electrophotographic photosensitive layer is uniformly and smoothly formed on the surface of a cylindrical support.

従来技術 従来、円筒状支持体に光導電性化合物を含む塗布液を塗
布するには、第１図に示したように塗布容器１に塗布液
２を入れ、両端を治具４．４′で密封した円筒状支持体
３を塗布液２に浸漬した後。Prior Art Conventionally, in order to apply a coating solution containing a photoconductive compound to a cylindrical support, as shown in FIG. After immersing the sealed cylindrical support 3 in the coating liquid 2.

引き上げて円筒状支持体３の表面に塗布液２を塗布する
ようにしている。The coating liquid 2 is applied to the surface of the cylindrical support 3 by pulling it up.

しかしながら、この浸漬塗工法では、円筒状支持体３の
下端３′と下部の治具４′の間に液がしみ込んだり、ま
た円筒状支持体３の内部に塗布液２が入り込み、治具４
，４′が円筒状支持体３に固着してしまうため、塗工工
程が完了した後の円筒状支持体３から治具４を外すこと
が困難であった。However, in this dip coating method, the liquid may seep between the lower end 3' of the cylindrical support 3 and the lower jig 4', or the coating liquid 2 may enter the inside of the cylindrical support 3, causing the jig 4' to penetrate into the cylindrical support 3.
, 4' are stuck to the cylindrical support 3, making it difficult to remove the jig 4 from the cylindrical support 3 after the coating process is completed.

また外した後の治具４の洗浄に手間がかかり、工程が増
えるという欠点があった。Furthermore, cleaning the jig 4 after removal is time consuming and the number of steps is increased.

また、円筒状支持体３を塗布液２に浸漬すると、液面が
変動し１円筒状支持体３の塗布膜が不均一になるため、
容器１の上部１′に溢れた塗布液２を流す流出口５を設
け、液面を一定にしているが、円筒状支持体３を挿入し
たときに塗布液２が溢れてから一定になるため、液面の
変動は避けられないという欠点があった。Furthermore, when the cylindrical support 3 is immersed in the coating liquid 2, the liquid level changes and the coating film on the cylindrical support 3 becomes uneven.
An outlet 5 is provided at the upper part 1' of the container 1 to allow the overflowing coating liquid 2 to flow, and the liquid level is kept constant. However, when the cylindrical support 3 is inserted, the coating liquid 2 overflows and becomes constant. However, there was a drawback that fluctuations in the liquid level were unavoidable.

また第２図に示したように円筒状支持体３の上端のみを
治具４で密閉し、下端から徐々に塗布液に浸漬して塗工
するようにした浸漬塗工方法も知られている。Furthermore, as shown in FIG. 2, a dip coating method is also known in which only the upper end of the cylindrical support 3 is sealed with a jig 4, and the coating is gradually dipped into the coating solution from the lower end. .

しかしながら、この浸漬塗工方法では、円筒状支持体３
を塗工液２に浸漬したとき、円筒状支持体３の内部の空
気が膨張して気泡が発生し、この気泡が円筒状支持体３
の側面に沿って上がるときに泡が円筒状支持体３の表面
に付着し、塗布欠陥を生じるという欠点があった。この
欠点を解消するために、円筒状支持体３の内部の気圧を
一定にする方法も提案されているが、円筒状支持体３の
内部の気圧を変動すると、塗布液２の液面が変動するの
で、塗布膜の厚さが変動するという欠点があった。また
１円筒状支持体３の下端部３′を解放するものでは、そ
の下端部３′の内部に塗布液２が入り込み、円筒状支持
体３の内面が塗布されてしまうが、このように円筒状支
持体３の内面が塗布された場合、後で塗布面を拭き取る
ことは著しく外観を悪くするという欠点があった。However, in this dip coating method, the cylindrical support 3
When the is immersed in the coating liquid 2, the air inside the cylindrical support 3 expands and bubbles are generated, and these air bubbles are immersed in the cylindrical support 3.
There was a drawback that bubbles adhered to the surface of the cylindrical support 3 as they rose along the sides of the cylindrical support 3, resulting in coating defects. In order to overcome this drawback, a method has been proposed in which the air pressure inside the cylindrical support 3 is kept constant; however, when the air pressure inside the cylindrical support 3 is changed, the liquid level of the coating liquid 2 changes. Therefore, there was a drawback that the thickness of the coating film varied. In addition, in the case where the lower end 3' of the cylindrical support 3 is released, the coating liquid 2 enters inside the lower end 3' and the inner surface of the cylindrical support 3 is coated. When the inner surface of the shaped support 3 is coated, wiping off the coated surface afterwards has the disadvantage that the appearance deteriorates significantly.

目的 本発明は、上記従来例の欠点を解消するためになされた
もので、その目的は円筒状支持体の両端を開放して円筒
状支持体の両面を同時に浸漬塗布することにより、円筒
状支持体の内部と外部との圧力差が生じることがなく、
また泡の発生もなく、更に塗布液中に浸漬される体積は
円筒状支持体の内部空間を含まず、それ自体の体積だけ
であるので、液面の変動は殆ど認められず、また円筒状
支持体の下部に治具を用いないため、この治具の使用に
基づく問題が生じな−い電子写真感光体の塗布方法を提
供することにある。Purpose The present invention has been made in order to eliminate the drawbacks of the above-mentioned conventional examples. There is no pressure difference between the inside and outside of the body,
In addition, there is no generation of bubbles, and since the volume immersed in the coating liquid does not include the internal space of the cylindrical support and is only the volume of the cylindrical support itself, there is almost no change in the liquid level. It is an object of the present invention to provide a coating method for an electrophotographic photoreceptor that does not use a jig below the support and thus does not cause problems due to the use of this jig.

一１處一 本発明の構成について、以下、ｌ実施例に基づいて説明
する。The configuration of the present invention will be described below based on an embodiment.

第３図は、本発明の１実施例の電子写真感光体の塗布方
法を説明するための図で、１は塗布装置、２は塗布液、
３は円筒状支持体、６は支持部材であり、この支持部材
６により円筒状支持体３の内部を固定して、支持部材６
とともに円筒状支持体３の全体を浸漬するようにしてい
る。なお、このように円筒状支持体の両面が同時に塗布
されていても、アースさえ取れれば使用上間層がない。FIG. 3 is a diagram for explaining a coating method for an electrophotographic photoreceptor according to an embodiment of the present invention, in which 1 is a coating device, 2 is a coating liquid,
3 is a cylindrical support body, 6 is a support member, the inside of the cylindrical support body 3 is fixed by this support member 6, and the support member 6 is
At the same time, the entire cylindrical support 3 is immersed. Incidentally, even if both surfaces of the cylindrical support are coated at the same time, there is no interlayer to be used as long as the grounding is established.

このように、本実施例の浸漬塗工法では、円筒状支持体
３の内外面を同時に浸漬塗布するので、円筒状支持体３
の内部に空気がなく、従って円筒状支持体３の外部と外
部との圧力差は発生せず、泡が発生しないという利点が
ある。また、塗布液２中に浸漬されている円筒状支持体
３の体積は。In this way, in the dip coating method of this embodiment, the inner and outer surfaces of the cylindrical support 3 are dip-coated at the same time, so that the cylindrical support 3
There is no air inside the cylindrical support 3, so there is no pressure difference between the outside and the outside of the cylindrical support 3, and there is an advantage that no bubbles are generated. Also, the volume of the cylindrical support 3 immersed in the coating liquid 2 is:

第１図及び第２図の従来例では、円筒状支持体３の内部
の空間も含まれるが、本実施例では、円筒状支持体３の
体積のみであるので、塗布液２の液面の変動は殆ど認め
られない。また下部の治具を用いないため、その使用に
基づく問題点から解放される。In the conventional examples shown in FIGS. 1 and 2, the space inside the cylindrical support 3 is included, but in this embodiment, only the volume of the cylindrical support 3 is included, so the liquid level of the coating liquid 2 is Almost no changes are observed. Furthermore, since no lower jig is used, problems associated with its use are avoided.

第４図は、本発明の他の実施例の電子写真感光体の塗布
方法を説明するための図で、１は塗布装置、２は塗布液
、３は円筒状支持体、７は支持部材であり、この支持部
材７は拡張、リング等を使用して円筒状支持体３の上端
の一部で支持し、この支持部材７が浸漬しないようにし
て塗布するようにしている。FIG. 4 is a diagram for explaining a coating method for an electrophotographic photoreceptor according to another embodiment of the present invention, in which 1 is a coating device, 2 is a coating liquid, 3 is a cylindrical support, and 7 is a support member. The support member 7 is supported by a part of the upper end of the cylindrical support member 3 using an extension, a ring, etc., and the coating is performed so that the support member 7 is not immersed.

本実施例では、第３図の実施例に比べて支持部材７が塗
布液２に浸漬されないので、この支持部材７の汚れによ
る洗浄等を省くことができる。In this embodiment, since the support member 7 is not immersed in the coating liquid 2 as compared to the embodiment shown in FIG. 3, cleaning and the like due to dirt on the support member 7 can be omitted.

なお、第４図の実施例では、支持部材７を浸漬しないよ
うにしているが、円筒状支持体３の上端にダミーリング
を設け、同時に浸漬してもよい。In the embodiment shown in FIG. 4, the support member 7 is not immersed, but a dummy ring may be provided at the upper end of the cylindrical support 3 and immersed at the same time.

効果 以上の説明から明らかなように、本発明は１円筒状支持
体の両端を開放−して、その両面を同時に浸漬塗布する
ことにより１円筒内部と外部の圧力差は発生せず、泡の
発生がなく、また塗布液中に浸漬される円筒状支持体の
体積は円筒状支持体の内部空間は含まれず、円筒状支持
体そのものの体積のみであるので、液面の変動は殆ど認
められず、更に下部の治具を用いないため、下部の治具
の使用に基づく問題点が解消されるという利点がある。Effects As is clear from the above explanation, the present invention opens both ends of a cylindrical support and dip-coats both sides at the same time, thereby eliminating the pressure difference between the inside and outside of the cylinder and eliminating bubbles. There is no generation, and since the volume of the cylindrical support immersed in the coating liquid does not include the internal space of the cylindrical support and is only the volume of the cylindrical support itself, almost no fluctuations in the liquid level are observed. First, since the lower jig is not used, there is an advantage that problems caused by the use of the lower jig are eliminated.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図及び第２図は従来の電子写真感光体の塗布方法を
説明するための図、第３図は本発明の実施例の電子写真
感光体の塗布方法を説明するための図、第４図は本発明
の他の実施例の電子写真感光体の塗布方法を説明するた
めの図である。 １・・・塗布装置、２・・・塗布液、３・・・円筒状支
持体、６．７・・・支持部材。 特許出願人　株式会社リコー 第１図　第２図1 and 2 are diagrams for explaining a conventional coating method for an electrophotographic photoreceptor, FIG. 3 is a diagram for explaining a coating method for an electrophotographic photoreceptor according to an embodiment of the present invention, and FIG. The figure is a diagram for explaining a coating method for an electrophotographic photoreceptor according to another embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Coating device, 2... Coating liquid, 3... Cylindrical support body, 6.7... Support member. Patent applicant Ricoh Co., Ltd. Figure 1 Figure 2

Claims (1)

【特許請求の範囲】[Claims] 光導電性化合物を含む塗布液を円筒状支持体に塗布して
被膜を設けた円筒状電子写真感光体において、該円筒状
電子写真感光体上の前記被膜の少なくとも一層を、前記
円筒状支持体の内外面を同時に浸漬塗布して形成するこ
とを特徴とする電子写真感光体の塗布方法。In a cylindrical electrophotographic photoreceptor in which a coating solution containing a photoconductive compound is applied to a cylindrical support to form a coating, at least one layer of the coating on the cylindrical electrophotographic photoreceptor is coated on the cylindrical support. A coating method for an electrophotographic photoreceptor, characterized in that the inner and outer surfaces of the electrophotographic photoreceptor are formed by dip coating at the same time.
JP9536184A 1984-05-11 1984-05-11 Coating method of electrophotographic sensitive body Pending JPS60238837A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9536184A JPS60238837A (en) 1984-05-11 1984-05-11 Coating method of electrophotographic sensitive body

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9536184A JPS60238837A (en) 1984-05-11 1984-05-11 Coating method of electrophotographic sensitive body

Publications (1)

Publication Number Publication Date
JPS60238837A true JPS60238837A (en) 1985-11-27

Family

ID=14135491

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9536184A Pending JPS60238837A (en) 1984-05-11 1984-05-11 Coating method of electrophotographic sensitive body

Country Status (1)

Country Link
JP (1) JPS60238837A (en)

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