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US 12,174,566 B2Granted
Heating apparatus including a plurality of heat generation members, fixing apparatus, and image forming apparatus
AssigneeCanon Kabushiki Kaisha
InventorsNozomu Nakajima, Tomohiro Nakamori
Life of this patent
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Abstract
The heating apparatus including a plurality of heat generation members including first, second and third generation members, the second heat generation member and the third heat generation member having lengths in a longitudinal direction shorter than a length of the first heat generation member, the heating apparatus including first, second, third, and fourth contacts, and a first switching unit configured to bring an electric path between the second contact and the fourth contact into one of a connecting state and an open state.
Claims11
A heating apparatus comprising:
- a substrate;
- at least one first heat generation member provided on the substrate;
- at least one second heat generation member provided at a position different from the first heat generation member in a lateral direction of the substrate, which has a length in a longitudinal direction of the substrate is shorter than a length of the first heat generation member in the longitudinal direction;
- a third heat generation member provided at a position different from the first heat generation member and second heat generation member in the lateral direction, which has a length in the longitudinal direction is shorter than a length of the first heat generation member in the longitudinal direction;
- a first electrode to which one end of the first heat generation member is connected;
- a second electrode to which one end of the second heat generation member and one end of the third heat generation member are connected;
- a third electrode to which another end of the third heat generation member is connected;
- a fourth electrode to which another end of the first heat generation member and another end of the second heat generation member are connected;
- a first switch configured to control supply of power to the first heat generation member, one end of the first switch connected to the first electrode and another end of the first switch connected to an AC power;
- a second switch configured to control supply of power to the second heat generation member and/or the third heat generation member, one end of the second switch connected to the third electrode and another end of the second switch connected to the AC power;
- and
- a relay configured to switch a power supply path to the second electrode and the fourth electrode between a connecting state and open state.
9 more elements
Dependencies are inferred from the claim text.