US 10,768,561 B2Granted

Fixing device and image forming apparatus

AssigneeKYOCERA Document Solutions Inc.

InventorsTakashi Eiki, Hiroki Kawasaki, Atsushi Kohama, Yuhiro Sakai

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Abstract

A fixing device includes a cylindrical rotatable fixing belt, a flat heater, a safety device, a heater holding part and a pressuring member. The flat heater has a plurality of heat generating parts. The safety device is arranged across two adjacent heat generating parts to interrupt power supply to the heat generating parts in a case where temperature reaches a threshold value. The heater holding part holds the flat heater so that the flat heater comes into contact with an inner circumference face of the fixing belt. The pressuring member sandwiches the fixing belt with the flat heater to form a pressuring area for sandwiching and conveying a sheet between the fixing belt and the pressuring roller.

Claims12

Dependent claims

A fixing device comprising:

a cylindrical rotatable fixing belt;
a flat heater having a plurality of heat generating parts;
a safety device arranged across two adjacent heat generating parts to interrupt power supply to the heat generating parts in a case where temperature reaches a threshold value;
a heater holding part holding the flat heater so that the flat heater comes into contact with an inner circumference face of the fixing belt;
and
a pressuring member sandwiching the fixing belt with the flat heater to form a pressuring area for sandwiching and conveying a sheet between the fixing belt and the pressuring roller,
wherein between the two adjacent heat generating parts and the safety device, a sheet-shaped heat conduction member promoting heat conduction from the heat generating part to the safety device is provided.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/509,737Filed 12 Jul 2019
Priority: JP 2018-13324313 Jul 2018
Published: US 2020/0019099 A116 Jan 2020
Granted: 8 Sep 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

G03G 15/2053
Using contact heat: structural details of heat elements, e.g. structure of roller or belt, eddy current, induction heating
G03G 15/2039
Using contact heat: with means for controlling the fixing temperature
G03G 15/2042
With means for controlling the fixing temperature: specially for the axial heat partition
G03G 15/2064
Using contact heat: combined with pressure

Family

US 2020/0019099 A1Pre-grant publication · published 16 Jan 2020
US 10,768,561 B2This patent

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

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