# US 4,627,701 A · Corona discharger system

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 4,627,701 A
- Document ID: US4627701A
- Status: Granted
- Kind: A
- Application number: 06/784,368
- Filed: 1985-10-04
- Granted: 1986-12-09
- Earliest claimed: 1982-05-20
- Assignees: Canon Kabushiki Kaisha
- Inventors: Shigeyoshi Onoda; Akihiro Nomura; Morikazu Mizutani; Shinji Kanemitsu; Mototada Toriumi; Fumio Nishino
- Web page: https://patentgrep.com/patent/US4627701A

## CPC

- G03G 21/1814: {Details of parts of process cartridge, e.g. for charging, transfer, cleaning, developing (G03G21/1835 takes precedence)}
- G03G 21/1628: {Clamshell type (G03G21/1638 takes precedence)}
- G03G 21/1671: {for the photosensitive element}
- G03G 21/1832: {Shielding members, shutter, e.g. light, heat shielding, prevention of toner scattering}
- G03G 2221/1609: protective arrangements for preventing damage
- G03G 2221/1612: plural shutters for openings of process cartridge
- G03G 2221/1636: for the exposure unit
- G03G 2221/1648: using seals, e.g. to prevent scattering of toner
- G03G 2221/1654: Locks and means for positioning or alignment
- G03G 2221/1687: using opening shell type machines, e.g. pivoting assemblies
- G03G 2221/1693: for charging
- G03G 2221/183: Process cartridge
- G03G 2221/1853: having a submodular arrangement
- G03G 2221/1876: for production purposes, e.g. manufacture or mass production
- G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY

## Abstract

A process kit is detachably mounted in the main body of an image forming apparatus and includes a housing in which a photosensitive member, a corona discharger and a developing device are mounted and held as a unit, the housing including an optical opening formed therein upstream of the corona discharger for conducting a homogeneous light to the photosensitive member to eliminate any remaining charge thereon and an opening of exposure for conducting a light of information to the photosensitive member, the exposure opening being located between the corona discharger and the developing device.

## Claims

### Claim 1

A corona discharger system comprising a corona wire; means for supporting both ends of the corona wire; a member movable into facing relation with said corona wire and having a surface which will hold an electrostatic latent image; and corona wire positioning member located between said surface and the mounted corona wire and always biased toward said surface by the tension of said wire.

### Claim 2

A corona discharger system comprising a corona wire; means for supporting both ends of the corona wire; a member movable into facing relation with said corona wire and having a surface which will hold an electorstatic latent image; and corona wire positioning member located between said surface and the mounted corona wire and always biased toward said surface by utilizing the tension of said corona wire and having a roller facing said surface.

### Claim 3

A corona discharging system comprising a corona wire; means for supporting both ends of the corona wire so as to tension said corona wire; a member movable into facing relation with said corona wire and having a surface which will hold an electrostatic latent image; a corona wire positioning member biased by the tension of said corona wire in the direction of said member; and guide means to adjust the range of movement of said corona wire positioning member.

### Claim 4 (depends on 3)

A corona discharger system according to claim 3, wherein said corona wire positioning member sets the position of said corona wire by abutting with said surface of said member and pushing up said corona wire.

### Claim 5 (depends on 3)

A corona discharger system according to claim 3, wherein said guide means controls the movement of said corona wire positioning member in the direction biased by said corona wire.

### Claim 6 (depends on 3)

A corona discharger system according to claim 3, wherein said guide means rotatably supports said corona wire positioning member.

### Claim 7

A corona discharger system comprising a corona wire; means for supporting both ends of said corona wire so as to tension said wire; a member movable into facing relation with said corona wire and having a surface which will hold an electrostatic latent image; a corona wire positioning member biased to the direction of said member by the tension of said corona wire and provided with a roller member at a side opposite to said corona wire; and guide means to control the range of the movement of said corona wire positioning member.

### Claim 8 (depends on 7)

A corona discharger system according to claim 7, wherein said corona wire positioning member sets the position of the corona wire by abutting said roller member with said surface of said member facing the corona discharger to push up the corona wire.

### Claim 9 (depends on 7)

A corona discharger system according to claim 7, wherein said guide means controls the movement of said corona wire positioning means biased by said wire.

### Claim 10 (depends on 7)

A corona discharger according to claim 7, wherein said guide means rotatably supports said corona wire positioning member.