Image forming apparatus including brush for surface of developer supplying member

Patent metadata

Field	Value
Publication number	US-12140885-B2
Application number	US-202217866669-A
Country	US
Kind code	B2
Filing date	Jul 18, 2022
Priority date	Jun 1, 2020
Publication date	Nov 12, 2024
Grant date	Nov 12, 2024

Abstract

A cartridge attachable to and detachable from an image forming apparatus forming an image on a recording material, the cartridge includes: an image bearing member; a developer container that contains therein a developer; a developing member that is rotatable and carries the developer supplied from the developer container and supplies the developer to the image bearing member; a developer supplying member that is rotatable and provided in the developer container and in contact with the developing member to supply the developer to a surface of the developing member; and a contact member provided in the developer container and in contact with a surface of the developer supplying member, wherein the developer remaining on the image bearing member after image formation is collected to the developing member, and the developer collected to the developing member is collected into the developer container.

First claim

What is claimed is:

1. An image forming apparatus forming an image on a recording material, the image forming apparatus comprising:
a developer container that contains developer therein;
a developer supplying member that is rotatable and provided in the developer container; and
a brush provided in the developer container and in contact with a surface of the developer supplying member,
wherein the brush includes a plurality of fibers and a base portion on which the plurality of fibers is provided,
wherein the developer container includes a recess portion, and the brush is stationarily disposed in the recess portion and the base portion is fixed by contacting a surface of the developer container such that the brush is fit into the recess portion.

2. The image forming apparatus according to claim 1 , wherein the fibers are configured scrape a foreign substance on the surface of the developer supplying member to remove the foreign substance from the surface of the developer supplying member.

3. The image forming apparatus according claim 2 , wherein the foreign substance is scraped by the plurality of fibers.

4. The image forming apparatus according to claim 1 , wherein the brush has a facing surface that faces the surface of the developer supplying member, and
wherein the fibers of the plurality of fibers are provided on the facing surface and extend in a direction perpendicular to the facing surface.

5. The image forming apparatus according to claim 1 , wherein the distance between the surface of the developer supplying member and a surface of the base portion is a distance between an outermost surface of the developer supplying member and the surface of the base portion.

6. The image forming apparatus according to claim 1 , wherein, when a direction in which the plurality of fibers extends from a surface of the base portion is defined as a raising direction, a fiber length of each of the fibers of the plurality of fibers starting at the base portion in the raising direction is longer than a distance between the surface of the developer supplying member and the surface of the base portion.

7. The image forming apparatus according to claim 1 , wherein a shape of the fibers of plurality of the fibers is crimped.

8. An image forming apparatus forming an image on a recording material, the image forming apparatus comprising:
a developer container that contains developer therein;
a developer supplying member that is rotatable and provided in the developer container; and
a brush provided in the developer container and in contact with a surface of the developer supplying member,
wherein the brush includes a plurality of fibers extending from a first surface of a base portion on which the plurality of fibers is provided, and the base portion includes a second surface on an opposite side of the base portion from the first surface,
wherein the developer container includes a recess portion, and the base portion is fixed by providing the second surface to a surface of the developer container such that the brush is fit into the recess portion.

Assignees

• Canon Kk

Inventors

• Watanabe Takanori
• Kobayashi Shinsuke
• Funatani Kazuhiro
• Umeda Kensuke
• Suzuki Ai

Classifications

• G03G21/0064

  using the developing unit, e.g. cleanerless or multi-cycle apparatus · CPC title

• G03G15/095 Primary

  Removing excess solid developer {, e.g. fog preventing} · CPC title

• G03G15/0887 Primary

  Arrangements for conveying and conditioning developer in the developing unit, e.g. agitating, removing impurities or humidity · CPC title

• G03G21/0035

  using a brush; Details of cleaning brushes, e.g. fibre density (G03G21/0064 takes precedence; magnetic brushes G03G21/0047) · CPC title

• G03G21/007

  Arrangement or disposition of parts of the cleaning unit · CPC title