US 2006/0216085 A1 · Cleaning unit, process cartridge, image forming apparatus, and toner

Cleaning unit, process cartridge, image forming apparatus, and toner

AssigneeRicoh Company, Ltd.

InventorsEisaku Murakami, Masami Tomita, Masanori Kawasumi, Toshio Koike, Naohiro Kumagai, Atsushi Sampe, Takeshi Shintani, Masato Yanagida, Yutaka Takahashi, Hiroya Hirose, Shin Hasegawa, Hiroyuki Nagashima, Takeshi Uchitani, Kazunori Karasawa, Kentaroh Matsumoto, Tokuya Ohjimi, Mugijiroh Uno

Life of this patent

Estimating the term…

Abstract

A cleaning unit includes a first blade and a second blade. The first blade is in contact with an image carrier or a paper carrier and removes adhered substances remained on surface of these. The second blade has an abrasive layer that is formed by including abrasive particles in an elastic material and is disposed in the downstream side of the first blade. The second blade is allowed to be in contact with the image carrier 1 or the paper carrier. Volume occupancy of abrasive particles in an area of contact of the second blade with either the image carrier or the paper carrier is not less than 50 percent and not more than 90 percent.

Claims47

Dependent claims

A cleaning unit installed in an image forming apparatus comprising:

a first blade located where a part of the first blade is in contact with a rotator constituting the image forming apparatus to remove residue on the rotator;
and
a second blade located where a part of the second blade is in contact with the rotator and having an abrasive layer, to remove residue not removed by the first blade,
wherein the second blade is in contact with the rotator in a trailing location with respect to a rotation direction of the rotator, and
wherein the first blade is in contact with the rotator in a countering direction with respect to a rotation direction of the rotator.

2 more elements

An image forming apparatus comprising:

a rotator where residue is adhered in an image forming process;
and
a cleaning unit that has
a first blade located where a part of the first blade is in contact with the rotator to remove residue on the rotator;
and
a second blade located where a part of the second blade is in contact with the rotator and having an abrasive layer, to remove residue not removed by the first blade,
wherein the second blade is in contact with the rotator in a trailing location with respect to a rotation direction of the rotator, and
wherein the first blade is in contact with the rotator in a countering direction with respect to a rotation direction of the rotator.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application

11/441,135Filed 26 May 2006

Priority

JP 2002-27675424 Sep 2002

Published

28 Sep 2006

Term ends

Not estimatedThe source records don’t support an estimate.

Classification8 codes

G03G 15/166
Comprising a rotatable holding member to which the second base is attached or attracted, e.g. screen transfer holding drum: with means for…
G03G 21/0011
For removing solid developer or debris from the electrographic recording medium: using a blade; Details of cleaning blades, e.g. blade shape,…
G03G 21/0076
Arrangement or disposition of parts of the cleaning unit: plural or sequential cleaning devices
G03G 2215/1661
Cleaning of transfer member: of transfer belt