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US 5,223,893 AGranted
Process cartridge detachably mountable to image forming apparatus
AssigneeCanon Kabushiki Kaisha
InventorsIsao Ikemoto, Kazushi Watanabe, Tadayuki Tsuda, Shinichi Sasaki
Life of this patent
Estimating the term…
Abstract
A process cartridge detachably mountable to an image forming apparatus includes an image bearing member; a developing device having a developer carrying member; a supporting device for supporting the image bearing member and the developer carrying member; a first device actable on the image bearing member; a second device actable on the developer carrying member; wherein the image bearing member and the developer carrying member are urged toward each other by the first and second devices.
Claims38
A process cartridge detachably mountable to a main assembly of an image forming apparatus, comprising:
- an image bearing member;
- developing means having a developer carrying member for carrying a developer;
- a supporting member for supporting said image bearing member and said developer carrying member for relative movement toward each other;
- a cleaning member elastically pressed to said image bearing member to remove residual developer from said image bearing member;
- and
- a regulating member, elastically pressed to said developer carrying member, for regulating a layer of the developer formed on said developer carrying member,
- wherein said image bearing member and said developer carrying member are pressed toward each other by said cleaning member and said regulating member.
4 more elements
A process cartridge detachably mountable to an image forming apparatus, comprising:
- an image bearing member;
- developing means having a developer carrying member for carrying a developer;
- supporting means for supporting said image bearing member and said developer carrying member such that said image bearing member is free to move relative to said developer carrying member;
- first means actable on said image bearing member;
- and
- second means actable on said developer carrying member;
- wherein said image bearing member and said developer carrying member are urged toward each other by said first means and said second means;
- and
- wherein said first means comprises a cleaning blade, and said second means comprises a developing blade, wherein said image bearing member is in the form of a photosensitive drum, and said cleaning blade urges the photosensitive drum at a line pressure in the range of 20-40 g/cm, and said developing blade urges said developer carrying member at a line pressure in the range of 20-70 g/cm.
6 more elements
A process cartridge detachably mountable to an image forming apparatus, comprising:
- am image bearing member;
- developing means having a developer carrying member for carrying a developer;
- supporting means for supporting said image bearing member and said developer carrying member such that said image bearing member is free to move relative to said developer carrying member;
- first means actable on said image bearing member;
- and
- second means actable on said developer carrying member;
- wherein said image bearing member and said developer carrying member are urged toward each other by said first means and said second means;
- wherein said image bearing member is movable relative to said supporting means with a predetermined amount of play;
- and
- wherein the amount of play is approximately 0.07 mm.
7 more elements
A process cartridge detachably mountable to an image forming apparatus, comprising:
- an image bearing member;
- developing means having a developer carrying member for carrying a developer;
- supporting means for supporting said image bearing member and said developer carrying member such that said image bearing member is free to move relative to said developer carrying member;
- first means actable on said image bearing member;
- and
- second means actable on said developer carrying member;
- wherein said image bearing member and said developer carrying member are urged toward each other by said first means and said second means;
- and
- wherein said developer carrying member is spaced apart from said image bearing member in the range of 100-500 microns.
6 more elements
An image forming apparatus, comprising:
- an image bearing member;
- developing means having a developer carry member for carrying a developer;
- supporting means for supporting said image bearing member and said developer carrying member such that said image bearing member is free to move relative to said developer carrying member;
- first means actable on said image bearing member;
- and
- second means actable on said developer carrying member;
- wherein said image bearing member and said developer carrying member are urged toward each other by said first means and said second means;
- wherein said image bearing member and said developer carrying member each include a cylindrical member, and said supporting means supports an outer peripheral surface of the cylindrical member;
- wherein said supporting member includes a spacer for maintaining a predetermined gap between said image bearing member and said developer carrying member;
- and
- further comprising transfer means for transferring an image from said image bearing member to a recording material and fixing means for fixing the image on the recording material.
8 more elements
An image forming apparatus, comprising:
- mounting means for mounting a process cartridge, wherein said process cartridge includes
- an image bearing member;
- developing means having a developer carrying member for carrying a developer;
- a supporting member for supporting said image bearing member and said developer carrying member for relative movement toward each other;
- a cleaning member elastically pressed to said image bearing member to remove residual developer from said image bearing member;
- and
- a regulating member, elastically pressed to said developer carrying member, for regulating a layer of the developer formed on said developer carrying member,
- wherein said image bearing member and said developer carrying member are pressed toward each other by said cleaning member and said regulating member;
- and
- conveying means for conveying a recording material on which recording is effected.
7 more elements
Dependencies are inferred from the claim text.