JPH01166365U

JPH01166365U -

Info

Publication number: JPH01166365U
Application number: JP6228588U
Authority: JP
Priority date: 1988-05-12
Filing date: 1988-05-12
Publication date: 1989-11-21

Description

[Brief explanation of drawings]

第１図および第２図は本考案の一実施例を示す
もので、第１図は現像ローラに対してシール部材
を展開した状態の図、第２図はシール部材の断面
図である。第３図〜第８図はシール部材の変形例
を示す図である。第９図は電子写真装置の概略構
成を示す図、第１０図は第９図のＸ―Ｘ線断面図
、第１１図は従来の現像ローラとシール部材との
関係を示す図である。１……感光体ドラム、（静電潜像担持体）、４
……現像ローラ、５……磁性粉体現像剤、１１…
…開口部、１２……ホツパ、１４……現像ローラ
、１５……ブレード、４１……シール部材、４１
Ａ……ブレード側端部、４１Ｃ……中央部分、５
１，５２，５３，５４……穴。 FIGS. 1 and 2 show an embodiment of the present invention, in which FIG. 1 is a diagram showing a state in which the seal member is unfolded relative to the developing roller, and FIG. 2 is a sectional view of the seal member. FIGS. 3 to 8 are diagrams showing modified examples of the seal member. FIG. 9 is a diagram showing a schematic configuration of an electrophotographic apparatus, FIG. 10 is a sectional view taken along the line X--X in FIG. 9, and FIG. 11 is a diagram showing the relationship between a conventional developing roller and a sealing member. 1... Photosensitive drum, (electrostatic latent image carrier), 4
...Developing roller, 5...Magnetic powder developer, 11...
...Opening portion, 12...Hopper, 14...Developing roller, 15...Blade, 41...Sealing member, 41
A...Blade side end, 41C...Central part, 5
1, 52, 53, 54...hole.

Claims

[Claims for Utility Model Registration] (1) A hopper that stores a magnetic powder developer inside and has an opening at a position facing the electrostatic latent image carrier, and the opening of the hopper contains the electrostatic latent image carrier. a developing roller that is rotatably arranged opposite to the image carrier and magnetically supports the magnetic powder developer; a blade that regulates the thickness of the magnetic powder developer supported on the surface of the developing roller; In a developing device of an electrophotographic apparatus, the developing device includes a sealing member provided in contact with the developing roller in the circumferential direction at a position corresponding to each end portion of the developing roller of the hopper, wherein the cross-sectional area of the sealing member on the blade side is A developing device for an electrophotographic apparatus, characterized in that the developing device is formed larger than at least a central portion. (2) A hopper containing a magnetic powder developer and having an opening at a position facing the electrostatic latent image carrier; A developing roller that is freely arranged and magnetically supports the magnetic powder developer, a blade that regulates the thickness of the magnetic powder developer carried on the surface of the developing roller, and each of the developing rollers of the hopper. In a developing device of an electrophotographic apparatus, the developing device includes a sealing member provided in contact with the developing roller in the circumferential direction at a position corresponding to the end portion, the sealing member having a uniform thickness in the length direction and a developing roller. A developing device for an electrophotographic apparatus, characterized in that the axial dimension of the roller is large on the blade side and small at least on the central portion. (3) A hopper containing a magnetic powder developer and having an opening at a position facing the electrostatic latent image carrier; A developing roller that is freely arranged and magnetically supports the magnetic powder developer, a blade that regulates the thickness of the magnetic powder developer carried on the surface of the developing roller, and each of the developing rollers of the hopper. A developing device for an electrophotographic apparatus including a sealing member provided in contact with the developing roller in the circumferential direction at a position corresponding to an end portion thereof, wherein a hole extending in the thickness direction is formed in at least a central portion of the sealing member. A developing device for an electrophotographic device characterized by: