# US 5,710,966 A · Cleaning device for removing non-transferred toner

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

- Number: US 5,710,966 A
- Document ID: US5710966A
- Status: Granted
- Kind: A
- Application number: 08/550,305
- Filed: 1995-10-30
- Granted: 1998-01-20
- Earliest claimed: 1994-10-31
- Assignees: NEC Corporation
- Inventors: Yasuhiro Otsuka; Masakazu Okuda
- Web page: https://patentgrep.com/patent/US5710966A

## CPC

- G03G 21/0005: {for removing solid developer or debris from the electrographic recording medium}
- G03G 15/32: in which the charge pattern is formed dotwise, {e.g. by a thermal head}(G03G15/04, G03G15/05, G03G15/34 take precedence)
- G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY

## Abstract

A cleaning device includes a removing portion and a heater. The removing portion removes a toner held by an electrostatic force on a first surface of a latent image charge holding member. The latent image charge holding member includes a pyroelectric layer having a first surface on which the toner is deposited. The heater heats the pyroelectric layer to reduce the electrostatic force attracting the toner to the first surface of the pyroelectric layer, and the removing portion thereby removes the toner from the latent image charge holding member. In another embodiment of the cleaning device, the heater is incorporated in the removing portion which is a blade. In still another embodiment the cleaning device includes a heater and an ultrasonic vibrator is used as the removing portion.

## Claims

### Claim 1

A cleaning device for a piezoelectric layer having a first surface on which a toner is disposed by an electrostatic force, said cleaning device comprising:
removing means adapted for removing said toner held on said first surface of said piezoelectric layer; and
distorting means for mechanically distorting said piezoelectric layer by pressing said piezoelectric layer between a pair of members to reduce said toner holding force of said piezoelectric layer, said removing means removing the toner from a portion of said piezoelectric layer which is distorted by said distorting means.

### Claim 2 (depends on 1)

A device according to claim 1, further comprising a cleaning case for storing the toner removed by said removing means.

### Claim 3 (depends on 1)

A device according to claim 1, wherein said distorting means comprises a distorting mechanism, disposed approximately midway along a traveling path of said piezoelectric layer in correspondence with said removing means, for bending and guiding said piezoelectric layer, which is distorted in the form of a narrow U shape.

### Claim 4 (depends on 1)

A device according to claim 1, wherein said distorting means comprises an ultrasonic vibrator for vibrating said piezoelectric layer while pressing said piezoelectric layer.

### Claim 5 (depends on 1)

A device according to claim 1, wherein said removing means comprises a blade which is brought into contact with the first surface of said piezoelectric layer distorted by said distorting means to mechanically scrape the toner from said piezoelectric layer whose toner holding force is reduced.

### Claim 6 (depends on 1)

A device according to claim 1, wherein said piezoelectric layer on which said device operates is a pyroelectric member.

### Claim 7 (depends on 6)

A device according to claim 6, wherein said piezoelectric layer is a portion of a latent image charge holding member.