| US 7,469,120 B2 | ||
| Image heating apparatus | ||
| Atsushi Iwasaki, Mishima (Japan); and Masafumi Maeda, Odawara (Japan) | ||
| Assigned to Canon Kabushiki Kaisha, Tokyo (Japan) | ||
| Filed on Sep. 14, 2006, as Appl. No. 11/531,893. | ||
| Claims priority of application No. 2005-271019 (JP), filed on Sep. 16, 2005. | ||
| Prior Publication US 2007/0065191 A1, Mar. 22, 2007 | ||
| Int. Cl. G03G 15/20 (2006.01) | ||
| U.S. Cl. 399—328 [399/329] | 5 Claims |
| 1. An image heating apparatus comprising:
a cylindrical film;
a heating member which contacts an internal periphery of said cylindrical film; and
a drive roller which forms a nip portion with said heating member through the cylindrical film;
wherein a recording material bearing an image is heated while the recording material is nipped and conveyed by the nip portion,
and
wherein a distance between a position at which said film starts contacting with the recording material in a conveyance direction
of the recording material and a position at which said film starts contacting with the drive roller in the conveyance direction
of the recording material is equal to or less than 3.5 mm over a longitudinal direction of the nip portion, and a line formed
by connecting positions at which said film is separated from the recording material in the conveyance direction has a substantially
arc shape which is most expanded to a downstream side of the conveyance direction in a proximity of a recording material conveyance
reference in the longitudinal direction of the nip portion.
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