ベルト定着装置

Belt fixing device

Abstract

PROBLEM TO BE SOLVED: To provide a belt fixing device capable of shortening time required until the temperature of a fixing nip is restored to a given fixing temperature after a fixing belt starts rotating upon receiving a printing start signal in the printing standby mode. SOLUTION: A belt fixing device 10 is equipped with: an endless sheet type fixing belt 12 to be heated; a nip forming member 17 arranged inside the belt 12; a rotatable pressing roller 20 which presses the member 17 while interposing the belt 12 between the nip forming member 17 and itself and whose contact part with the belt 12 constitutes a fixing nip 22; and a heater lamp 14 for heating the fixing belt arranged at a position apart from the nip 22 inside the belt 12. The nip 22 is positioned above the lamp 14. COPYRIGHT: (C)2005,JPO&NCIPI
【課題】印刷待機時に印刷開始信号を受けて定着ベルトが回転し始めてから定着ニップの温度が所定の定着温度に回復するのに要する時間を短縮できるベルト定着装置を提供する。 【解決手段】本発明のベルト定着装置10は、加熱されるエンドレスシート状の定着ベルト12と、定着ベルト12の内側に配置されたニップ形成部材17と、ニップ形成部材17に対して定着ベルト12を挟んで圧接され、定着ベルト12との接触部が定着ニップ22になっている回転可能な加圧ローラ20と、定着ベルト12の内側であって定着ニップ22から離れた位置に配置された定着ベルト加熱用のヒータランプ14とを備え、定着ニップ22がヒータランプ14に対して上側に位置していることを特徴とする。 【選択図】 図1

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