US 10,503,104 B2Granted

Fixing apparatus and image forming apparatus having a pad that presses an endless belt

AssigneeCanon Kabushiki Kaisha

InventorDaigo Matsuura

Life of this patent

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Abstract

A fixing device for an envelope includes an endless belt, a driving rotatable member, and a pad that includes a base portion, a first projecting portion projecting from the base portion toward the driving rotatable member at an upstream end in a feeding direction of the envelope, a second projecting portion projecting from the base portion toward the driving rotatable member at a downstream end in the feeding direction of the envelope, and a recess portion, provided between the first projecting portion and the second projecting portion in the feeding direction of the envelope. When a fixing process is performed on the envelope, an inner surface of the endless belt is in contact with both of the first projecting portion and the second projecting portion, and is spaced from the recess portion.

Claims9

Dependent claims

A fixing device for an envelope, the fixing device comprising:

(A) an endless belt configured to heat a toner image, formed on an envelope, in a nip portion;
(B) a driving rotatable member configured (a) to form the nip portion in cooperation with the endless belt, and (ii) to rotationally drive the endless belt;
and
(C) a pad configured to press the endless belt at an inner surface toward the driving rotatable member, the pad including:
(a) a base portion;
(b) a first projecting portion projecting from the base portion toward the driving rotatable member at an upstream end in a feeding direction of the envelope;
(c) a second projecting portion projecting from the base portion toward the driving rotatable member at a downstream end in the feeding direction of the envelope;
and
(d) a recess portion, provided between the first projecting portion and the second projecting portion in the feeding direction of the envelope,
wherein, when a fixing process is performed on the envelope, the inner surface of the endless belt is in contact with both of the first projecting portion and the second projecting portion, and is spaced from the recess portion.

7 more elements

An image forming apparatus comprising:

(A) an image forming portion configured to form a toner image on a recording material;
(B) an endless belt configured to heat the toner image, formed on the recording material, in a nip portion;
(C) a driving rotatable member configured (a) to form the nip portion in cooperation with the endless belt, and (b) to rotationally drive the endless belt;
(D) a pad configured to press the endless belt at an inner surface toward the driving rotatable member, the pad including:
(a) a base portion;
(b) a first projecting portion projecting from the base portion toward the driving rotatable member at an upstream end in a feeding direction of the recording material;
(c) a second projecting portion projecting from the base portion toward the driving rotatable member at a downstream end in the feeding direction of the recording material;
and
(d) a recess portion, provided between the first projecting portion and the second projecting portion in the feeding direction of the recording material;
and
(E) an executing portion configured to execute an operation in one of a plurality of modes, the plurality of modes including:
(a) a first mode, in which an inner surface of the endless belt is in contact with the first projecting portion, the second projecting portion, and the base portion provided between the first projecting portion and the second projecting portion with respect to the feeding direction of the recording material;
and
(b) a second mode, in which the inner surface of the endless belt is in contact with the first projecting portion and the second projecting portion, and is spaced from the recess portion.

11 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/015,530Filed 22 Jun 2018 · continuation
Priority: JP 2015-25357125 Dec 2015
Published: US 2018/0299807 A118 Oct 2018
Granted: 10 Dec 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification4 codes

G03G 15/2053
Using contact heat: structural details of heat elements, e.g. structure of roller or belt, eddy current, induction heating
G03G 15/6594
Characterised by the copy material, e.g. postcards, large copies, multi-layered materials, coloured sheet material: characterised by the format or…
G03G 2215/00514
Copy medium: envelopes
G03G
Electrography

Family

PCT/JP2016/089225Parent of this continuation · filed 22 Dec 2016
US 2018/0299807 A1Pre-grant publication · published 18 Oct 2018
US 10,503,104 B2This patent

From the US filing history. Foreign family members aren’t listed.

Timeline

Citations

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