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US 5,347,348 AGranted
Image fixing apparatus with detector for detecting movement of endless belt
AssigneeCanon Kabushiki Kaisha
InventorTsunetoshi Nagata
Life of this patent
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Abstract
An image fixing apparatus includes a heater; a rotatable endless film, wherein an unfixed image on a recording material is heated and fixed by heat from the heater through the endless film; a displaceable member made of heat resistive resin material displaceable in accordance with movement of the endless film in a direction perpendicular to movement of the endless film; detecting element for detecting the displaceable member, the detecting element detecting the displaceable member to detect a lateral shift of the endless film.
Claims8
An image heating apparatus, comprising:
- a heater;
- an endless belt movable in sliding contact with said heater;
- a first roller, disposed downstream of said heater with respect to a movement direction of said endless belt, said endless belt being stretched around said first roller;
- a second roller, disposed upstream of said heater with respect to the movement direction of said endless belt, said endless belt being stretched around said second roller;
- a displaceable member contacting an edge of said endless belt at a position downstream of said first roller and upstream of said second roller, said movable means comprising heat insulative resin;
- and
- a photosensor for optically detecting said displaceable member to determine a lateral shift of said endless belt.
4 more elements
Dependencies are inferred from the claim text.