# US 6,298,205 B1 · Charging apparatus which stores electrically conductive particles in granule form

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- Number: US 6,298,205 B1
- Document ID: US6298205B1
- Status: Granted
- Kind: B1
- Application number: 09/387,491
- Filed: 1999-09-01
- Granted: 2001-10-02
- Earliest claimed: 1998-09-01
- Assignees: Canon Kabushiki Kaisha
- Inventors: Yasunori Chigono; Harumi Ishiyama; Jun Hirabayashi
- Web page: https://patentgrep.com/patent/US6298205B1

## CPC

- G03G 13/025: {by contact, friction or induction}
- G03G 2215/021: by contact, friction or induction
- G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY

## Abstract

A charging apparatus for charging a member to be charged, the charging apparatus includes a charging member for electrically charging the member to be charged; and electroconductive particle supplying means for loosening electroconductive particles stored in the form of granules each comprising aggregated electroconductive particles and supplying the loosened electroconductive particles to the charging member.

## Claims

### Claim 1

A charging apparatus for charging a member to be charged, said charging apparatus comprising:
a charging member for electrically charging the member to be charged; and
electroconductive particle applying means for loosening electroconductive particles stored in the form of a large number of granules each comprising aggregated electroconductive particles and supplying the loosened electroconductive particles to said charging member,
wherein the granules have a size of 0.1-10 mm.

### Claim 2

A charging apparatus for charging a member to be charged, said charging apparatus comprising:
a charging member for electrically charging the member to be charged; and
electroconductive particle applying means for loosening electroconductive particles stored in the form of a large number of granules each comprising aggregated electroconductive particles and supplying the loosened electroconductive particles to said charging member,
wherein an abrasion ratio of the granule is not less than 20% and not more than 80%.

### Claim 3

A charging apparatus for charging a member to be charged, said charging apparatus comprising:
a charging member for electrically charging the member to be charged; and
electroconductive particle applying means for loosening electroconductive particles stored in the form of a large number of granules each comprising aggregated electroconductive particles and supplying the loosened electroconductive particles to said charging member,
wherein said charging member has a surface foam layer.

### Claim 4

A charging apparatus for charging a member to be charged, said charging member apparatus comprising:
a charging member for electrically charging the member to be charged, said charging member has a surface rubber layer; and
electroconductive particle supplying means for loosening electroconductive particles stored in the form of granules each comprising aggregated electroconductive particles and supplying the loosened electroconductive particles to said charging member;
wherein said electroconductive particle supplying means includes a regulating member for regulating an amount of supply of the electroconductive particles, and
wherein the regulating member is pressed against the rubber layer.

### Claim 5

A charging apparatus for charging a member to be charged, said charging apparatus comprising:
a charging member for electrically charging the member to be charged; and
electroconductive particle applying means for loosening electroconductive particles stored in the form of a large number of granules each comprising aggregated electroconductive particles and supplying the loosened electroconductive particles to said charging member,
wherein the electroconductive particles have an average particles size of 50 nm-5 μm.

### Claim 6

A charging apparatus for charging a member to be charged, said charging apparatus comprising:
a charging member for electrically charging the member to be charged; and
electroconductive particle applying means for loosening electroconductive particles stored in the form of a large number of granules each comprising aggregated electroconductive particles and supplying the loosened electroconductive particles to said charging member,
wherein the loosened electroconductive particles are rubbed with said charging member, by which the electroconductive particles are further loosened.