image heating device

Abstract

Abstract PURPOSE:To prevent a film from wrinkling owing to the displacement of a film part on a film end part side to the center part of the film by forming a pressure roller substantially in an inverted crown shape. CONSTITUTION:The film 21 is sandwiched with a heating body 19 to form a nip part N and the pressure roller 10 as a rotary body for driving the film is so shaped that the roller is not in a straight shape, but in the inverted crown shape in the length direction or substantially in the inverted crown shape having end parts cut 12a. Thus, the pressure roller 10 is formed in the inverted crown shape, so that the distribution of pressure applied to the film 21 by the roller at the nip part N with the heating body 19 is larger at the width-directional end parts of the film then at the center part. Forces from the center part to both end sides operate on the film 21, which is conveyed while unwrinkled. Consequently, the film is prevented from wrinkling and the wrinkling of a recording material sheet P can be prevented.

Inventors

• 👤 Takeshi Setoriyama
• 👤 武 世取山
• 👤 Akira Kuroda
• 👤 明 黒田

Bibliographic Details