Cartridge, unit, and method for manufacturing the same

Patent metadata

Field	Value
Publication number	US-2016185036-A1
Application number	US-201514979097-A
Country	US
Kind code	A1
Filing date	Dec 22, 2015
Priority date	Dec 25, 2014
Publication date	Jun 30, 2016
Grant date	—

Abstract

A cartridge and unit removably attachable to an image forming apparatus, allowing a member for securing a sheet member to be easily mounted with high precision, and capable of preventing leakage of a developing agent and a method for manufacturing the same are provided.
A cleaning unit 2 a includes a frame 24 including a waste-toner chamber 30 storing a developing agent eliminated from the image bearing member 21, an end-portion seal member 26 a disposed on the frame 24 and being in contact with the image bearing member 21, a scooping sheet 15 including an end arranged on the end-portion seal member 26 a and used for preventing the developing agent in the waste-toner chamber 30 from leaking through an area between the frame 24 and the image bearing member 21, and a resin member 10 for securing the scooping sheet 15 to the frame and being injection-molded to the frame 24. The resin forming the resin member 10 is made to enter the end-portion seal member 26 a , and the end-portion seal member 26 a and the resin member 10 are integrated.

First claim

1 . A unit manufacturing method for manufacturing a unit, the unit including
a frame including a developing-agent containing portion, a rotary member rotatably disposed on the frame, an end-portion seal member disposed on the frame and being in contact with an end portion in a lengthwise direction of the rotary member, a thin plate member disposed along the lengthwise direction and including an end in a direction that crosses the lengthwise direction, the end being arranged on the rotary member, and a resin member that secures the thin plate member to the frame and that is injection-molded to the frame, the unit manufacturing method comprising: a first step of arranging the end-portion seal member on the frame; a second step of making a mold come into contact with the frame, injection-molding resin into a space defined by the frame, the end-portion seal member, and the mold, and forming the resin member; a third step of placing the thin plate member on the resin member and bonding the thin plate member to the frame by melting the resin member; and a fourth step of securing the rotary member to the frame, wherein in the second step, resin forming the resin member is made to enter the end-portion seal member, and the end-portion seal member and the resin member are integrated.

2 . The unit manufacturing method according to claim 1 , wherein the end-portion seal member includes a porous portion,
in the second step, the resin forming the resin member is made to enter the porous portion, and the end-portion seal member and the resin member are integrated.

3 . The unit manufacturing method according to claim 1 , wherein the end-portion seal member includes a fibrous portion,
in the second step, the resin forming the resin member is made to enter the fibrous portion, and the end-portion seal member and the resin member are integrated.

4 . The unit manufacturing method according to claim 1 , wherein in the third step, the thin plate member is bonded to the end-portion seal member by the resin member.

5 . The unit manufacturing method according to claim 1 , wherein the resin member comprises thermoplastic elastomer resin.

6 . The unit manufacturing method for manufacturing the unit according to claim 1 , wherein the resin member contains carbon black.

7 . The unit manufacturing method according to claim 1 , wherein the rotary member comprises an image bearing member,
the developing-agent containing portion comprises a waste-toner chamber that stores a developing agent eliminated from the image bearing member, and the thin plate member comprises a scooping sheet for preventing the developing agent from leaking from the waste-toner chamber.

8 . A cartridge manufacturing method for manufacturing a cartridge removably attachable to a main body of an image forming apparatus, the cartridge manufacturing method including the unit manufacturing method according to claim 7 .

9 . The unit manufacturing method according to claim 1 , wherein the rotary member comprises a developing-agent bearing member, and
the thin plate member comprises a blow-off preventing sheet for preventing the developing agent from leaking from the developing-agent containing portion.

10 . A cartridge manufacturing method for manufacturing a cartridge removably attachable to a main body of an image forming apparatus, the cartridge manufacturing method including the unit manufacturing method according to claim 9 .

Assignees

• Canon Kk

Inventors

• Yamasaki Toshiteru
• Suzuki Akira
• Hoshi Nobuharu
• Yamasaki Akiko

Classifications

• B29C65/1616 Primary

  Near infrared radiation [NIR], e.g. by YAG lasers · CPC title

• G03G21/181

  Manufacturing or assembling, recycling, reuse, transportation, packaging or storage · CPC title

• B29K2025/04

  Polymers of styrene · CPC title

• B29C65/44 Primary

  Joining a heated non plastics element to a plastics element · CPC title

• B29C45/0053

  combined with a final operation, e.g. shaping (injection-compression moulding B29C45/561) · CPC title