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US 5,289,247 AGranted
Image forming apparatus with changeable feed interval for continuous feed
AssigneeCanon Kabushiki Kaisha
InventorsManabu Takano, Masahiro Goto, Koichi Suwa
Life of this patent
Estimating the term…
Abstract
A feed interval of continuous feeding is changed according to the set temperature of a heating member or the size of a recording material, or a feed interval is long for a predetermined time after a state for forming an image is established and is then decreased after the predetermined time has passed, thereby causing a slight increase in the temperature of the non-passage portion.
Claims10
An image forming apparatus comprising:
- means for fixing an unfixed image on a recording material, said fixing means comprising a heating member selectively maintainable at one of at least a first set temperature and a second set temperature lower than the first set temperature during fixing, and a backup member forming a nip with said heating member so that said nip conveys a recording material holding an unfixed image thereon through said nip to fix the unfixed image;
- feed means for continuously feeding recording materials on which there is an unfixed image to said fixing means;
- and
- feed interval control means for switching between a first feed interval at the first set temperature and a second feed interval shorter than the first feed interval at the second set temperature during continuous feeding of the recording materials.
1 more element
An image forming apparatus comprising:
- a heating member for fixing;
- temperature control means for maintaining said heating member at a predetermined set temperature during fixing;
- a backup member forming a nip with said heating member to convey a recording material holding an unfixed image through said nip to fix the unfixed image;
- feed means for continuously feeding recording materials at intervals to said nip for fixing an unfixed image on each of said recording materials;
- size detection means for detecting a size of the recording material;
- and
- feed interval control means for controlling the feed interval of said recording materials on the basis of the results of detection by said size detection means;
- wherein said feed interval control means makes the feed interval longer when said size detection means detects that a recording material has a small passage region in said nip.
5 more elements
Dependencies are inferred from the claim text.