Image heating apparatus and conveying roller for use therein

Details Image heating apparatus and conveying roller for use therein Image heating apparatus and conveying roller for use therein

2007-07-31

2007-07-31

Brase, Sandra L. (Department: 2852)

Electrophotography

Image formation

Fixing

C399S331000, C219S216000

Reexamination Certificate

active

11091638

ABSTRACT:
An image heating apparatus for heating an image formed on a recording material, the apparatus including a conveying roller for conveying a recording material, the conveying roller including a metal core and an elastic layer provided outside the metal core, wherein the metal core has, in a central portion in the longitudinal direction thereof, a straight shape area having a substantially uniform diameter along the longitudinal direction and tapered shape areas, on both sides of the straight shape area, in which a diameter gradually decreases toward ends in the longitudinal direction, and wherein the elastic layer has, in a central portion in the longitudinal direction thereof, a straight shape area having a substantially uniform diameter along the longitudinal direction and inverted crown shape areas, on both sides of the straight shape area, in which a diameter gradually increases toward ends in the longitudinal direction. This configuration allows to prevent defects in image heating while suppressing creases in the recording material.

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