Patent ID: 6869756
Filing Date: 2005-03-22
Classification: G03C,G03D

Abstract:
1. A heat developing apparatus comprising: a recording portion for exposing a heat developing recording material with a light beam to form a latent image; a heat developing portion for heating said heat developing recording material by a heating medium thereof to perform heat development; a previously-heating portion for heating the overall surface of said heat developing recording material on a base layer to a predetermined temperature not lower than a glass transition temperature and not higher than heat development start temperature, wherein the glass transition temperature is a glass transition point of the base layer; a plurality of thermosensors for sampling the temperatures of the overall surface of said heat developing recording material; and a comparator for performing a comparison whether or not all of the temperatures detected by said thermosensors have been raised to said predetermined temperature are disposed between said recording portion and said heat developing portion, wherein after said comparator has detected that all of the temperatures detected by said thermosensors and said predetermined temperature substantially coincide with one another, said developing operation is started.