# US 11,480,916 B2 · Cartridge having toner removing sheet in contact with photosensitive drum

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- Number: US 11,480,916 B2
- Document ID: US11480916B2
- Status: Granted
- Kind: B2
- Application number: 17/396,846
- Filed: 2021-08-09
- Published: 2021-11-25
- Granted: 2022-10-25
- Earliest claimed: 2018-12-28
- Assignees: Canon Kabushiki Kaisha
- Applicants: Canon Kabushiki Kaisha
- Inventors: Takuya Kawakami; Noriyuki Komatsu; Tetsuya Numata; Naoya Asanuma; Daisuke Makiguchi
- Web page: https://patentgrep.com/patent/US11480916B2

## CPC

- G03G 15/0898: {for preventing toner scattering during operation, e.g. seals (sealing the donor member G03G15/0817; sealing the magnetic brush G03G15/0942)}
- G03G 21/1814: {Details of parts of process cartridge, e.g. for charging, transfer, cleaning, developing (G03G21/1835 takes precedence)}
- G03G 15/0817: {characterised by the lateral sealing at both sides of the donor member with respect to the developer carrying direction}
- G03G 21/0005: {for removing solid developer or debris from the electrographic recording medium}
- G03G 21/10: Collecting or recycling waste developer
- G03G 21/12: Toner waste containers
- G03G 21/1817: {having a submodular arrangement}
- G03G 21/1828: {Prevention of damage or soiling, e.g. mechanical abrasion (G03G21/1839 takes precedence)}
- G03G 21/1832: {Shielding members, shutter, e.g. light, heat shielding, prevention of toner scattering}
- G03G 21/1853: {the process cartridge being mounted perpendicular to the axis of the photosensitive member}
- G03G 2221/0057: Separate cleaning members for foreign matter and residual toner
- G03G 2221/0063: Cleaning device for foreign matter separate from residual toner cleaning device
- G03G 2221/1853: having a submodular arrangement
- G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY

## Abstract

A cartridge detachably mountable to a main assembly of an image forming apparatus includes a photosensitive member unit including a photosensitive drum; a sheet configured to remove a deposited matter from a surface of the drum, the sheet being in contact with the surface of the drum at an end portion of the drum with respect to a rotational axis direction of the member; and a developing unit detachably mounted to the member unit, the developing unit including a developing roller configured to supply toner to the drum, and a storage portion configured to store the deposited matter removed from the surface of the drum by the sheet.

## Claims

### Claim 1

A cartridge comprising:
a photosensitive member unit including a photosensitive drum, the photosensitive drum being rotatable about a rotational axis thereof;
a conveyance roller contacting the photosensitive drum to form a conveyance nip for conveying a recording material;
a sheet in contact with a surface of the photosensitive drum at an end portion of the photosensitive drum in a direction of the rotational axis; and
a developing unit detachably mounted to the photosensitive member unit, the developing unit including a developing roller contacting the photosensitive drum to form a developing contact portion where toner is supplied from the developing roller to the photosensitive drum, the developing unit including a developing frame supporting the developing roller, the frame being provided with a recessed portion that is recessed in a direction away from the photosensitive member unit when viewed in the direction of the rotational axis,
wherein the sheet is in contact with the surface of the photosensitive drum at a position of the photosensitive drum that is downstream of the developing contact portion and upstream of the conveyance nip in a rotational direction of the photosensitive drum, and
wherein, in a state that the cartridge is oriented such that the photosensitive drum is above the conveyance roller and such that the photosensitive drum and the developing roller align in a gravity direction, the recessed portion is below the surface of the photosensitive drum and between the conveyance nip and the developing contact portion when viewed in the direction of the rotational axis.

### Claim 2 (depends on 1)

The cartridge according to claim 1, wherein the sheet is provided in the photosensitive member unit.

### Claim 3 (depends on 1)

The cartridge according to claim 1, wherein the sheet is provided in the developing unit.

### Claim 4 (depends on 3)

The cartridge according to claim 3, wherein the sheet is attached to the developing frame.

### Claim 5 (depends on 1)

The cartridge according to claim 1, wherein the sheet is disposed at a position overlapping a position where the developing roller is provided in the direction of the rotational axis.

### Claim 6 (depends on 1)

The cartridge according to claim 1, further comprising a sealing member filling a gap between the developing frame and an end portion of the developing roller in the direction of the rotational axis,
wherein the sheet is disposed at a position overlapping a position where sealing member is provided.

### Claim 7 (depends on 1)

The cartridge according to claim 1, wherein the photosensitive member unit includes a cleaning roller contacting the surface of the photosensitive at a position thereof downstream of the conveyance nip and upstream of the developing contact portion in the rotational direction of the photosensitive drum,
wherein the sheet is in contact with a region of the surface of the photosensitive drum that is opposite to a region of the surface of the photosensitive drum where the cleaning roller contacts with respect to the rotational axis when viewed in the direction of the rotational axis.

### Claim 8 (depends on 4)

The cartridge according to claim 4, wherein a part of the developing frame to which the sheet is attached is overlapped with the photosensitive drum when viewed in the gravity direction.