Patent ID: 11966178
Assignee: RICOH COMPANY, LTD.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A heating device, comprising:
a heater including a heat generator;
a holder to hold the heater; and
a positioner to position the heater relative to the holder in a longitudinal direction of the heater,
wherein:
the heater includes a base layer, a first insulating layer, a conductor layer, a second insulating layer, and a third insulating layer,
the first insulating layer, the conductor layer, and the second insulating layer, are layered in this order on a first side of the base layer facing a fixing nip, and the third insulating layer is layered on a second side of the base layer opposite the first side,
the conductor layer includes the heat generator, and
the heater includes a region not having the third insulating layer at a position of the positioner,
the heating device further comprises:
a frame to support the holder;
a secondary positioner to position the holder and the frame in the longitudinal direction of the heater; and
a tertiary positioner to position the frame and a body of an image forming apparatus in the longitudinal direction of the heater,
wherein the positioner and one of the secondary positioner and the tertiary positioner are disposed on an identical side defined by a center of the heat generator in the longitudinal direction of the heater, and
wherein the positioner and the one of the secondary positioner and the tertiary positioner do not have a corresponding positioner disposed on an opposite side of the heat generator which is opposite to said identical side relative to the center of the heat generator.