CARTRIDGE

• US 20170205764A1
• Filed: 01/11/2017
• Published: 07/20/2017
• Est. Priority Date: 01/18/2016
• Status: Active Grant

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Torii, Go, Asanuma, Naoya
• Granted Patent: US 10,037,000 B2
• Time in Patent Office: Days
• CPC Class Codes: G03G 15/0817 characterised by the lateral sealing at both sides of the donor member with respect to the developer carrying direction
• CPC Class Codes: G03G 15/0898 for preventing toner scattering during operation, e.g. seals sealing the donor member G03G15/0817; sealing the magnetic brush G03G15/0942
• CPC Class Codes: G03G 21/1832 Shielding members, shutter, e.g. light, heat shielding, prevention of toner scattering

Abstract

A cartridge includes a frame; a rotatable member for carrying a developer; a blade member contacting the rotatable member; a first seal member provided extended in a rotational axis direction of the rotatable member between the blade member and the frame so as to contact the blade member and the frame; a second seal member provided extended in a direction crossing the rotational axis direction of the rotatable member between the rotatable member and the frame so as to have a first surface contacting the first seal member; and a second surface provided on the frame and extended in a direction crossing the rotational axis direction of the rotatable member so as to contact the first seal member. The first seal member includes a portion sandwiched between the first surface and the second surface with respect to the rotational axis direction.

Claims

1. A cartridge detachably mountable to a main assembly of an image forming apparatus, comprising:

a frame;

a rotatable member, supported by said frame, for carrying a developer;

a blade member contacting said rotatable member;

a first seal member provided extended in a rotational axis direction of said rotatable member between said blade member and said frame so as to contact said blade member and said frame;

a second seal member provided extended in a direction crossing the rotational axis direction of said rotatable member between said rotatable member and said frame so as to have a first surface contacting said first seal member; and

a second surface provided on said frame and extended in a direction crossing the rotational axis direction of said rotatable member so as to contact said first seal member,

wherein said first seal member includes a portion sandwiched between said first surface and said second surface with respect to the rotational axis direction.

2. A cartridge according to claim 1, further comprising an urging portion for urging said second seal member toward said first surface.

3. A cartridge according to claim 1, wherein the direction in which said first surface of said second seal member is extended and the direction in which said second surface of said frame cross each other.

4. A cartridge according to claim 1, wherein said first seal member is an elastic member.

5. A cartridge according to claim 1, wherein said second surface contacts said blade member.

6. A cartridge according to claim 1, wherein said rotatable member is a developing roller for supplying the developer to an image bearing member, and said blade member is a developing blade for regulating a thickness of a layer of the developer on said rotatable member.

7. A cartridge according to claim 1, wherein said rotatable member is a photosensitive drum, and said blade member is a cleaning blade for removing a foreign matter from a surface of said rotatable member.

8. A cartridge according to claim 6, further comprising a photosensitive member as the image bearing member.

9. A cartridge according to claim 1, wherein an end portion of said seal member with respect to the rotational axis direction of said rotatable member contacts said first surface.

10. A cartridge according to claim 1, wherein the direction in which said first surface is extended is a direction inclined with respect to the rotational axis direction of said rotatable member.

11. A cartridge according to claim 1, wherein the direction in which said second surface is extended is a direction inclined with respect to the rotational axis direction of said rotatable member.

12. A cartridge according to claim 1, wherein said frame includes a bearing surface for supporting said first seal member and a wall which projects toward said blade member relative to said bearing surface and on which said second surface is formed, and

wherein said wall and said blade member are in non-contact with each other.