Image heating apparatus

摘要

The image heating apparatus includes an endless belt, a heater placed in contact with an inner surface of the endless belt, a holder made of resin, adapted to hold the heater, and provided with a supporting space to be fitted with the heater, where a through hole is formed in a heater receiving surface of the holder at a bottom area of the supporting space; and a back-up member adapted to form a nip together with the heater to pinch and convey a recording material through the endless belt. In the bottom area, hollow portions recessed from the bottom area are provided at opposite ends in a short direction of the holder, being located at locations in a longitudinal direction of the holder different from a location in which the through hole is formed. Consequently, even if the heater heats up abnormally, heater cracks can be prevented.

主权项

1. An image heating apparatus for heating an image formed on a recording material, comprising:
an endless belt; a heater configured to contact an inner surface of the endless belt; a holder made of resin and configured to hold the heater, the holder forming a supporting space in which the heater is engaged, where a heater receiving surface of the holder at a bottom area of the supporting space has formed therein one or more through holes; and a back-up member configured to form a nip together with the heater to pinch and convey the recording material through the endless belt, wherein the heater receiving surface includes one or more recessed hollow portions forming recessed portions of the bottom area, at both ends in a short direction of the holder, the hollow portions being located at a different position in a longitudinal direction of the holder from the one or more through holes.