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US 7,680,438 B2Granted
Image forming apparatus having contactless type temperature sensor
AssigneeCanon Kabushiki Kaisha
InventorTakashi Yano
Life of this patent
Estimating the term…
Abstract
A sealing member which is compressed by a contactless temperature sensor and a cover member of a fixing unit is provided between the sensor and the cover member. An opening portion for temperature detection is shut off from a space around the fixing unit by the sealing member, thereby preventing the air from flowing from the opening portion into the fixing unit.
Claims9
An image forming apparatus comprising:
- an apparatus main body;
- an image fixing unit which is detachably provided for the apparatus main body and has a heating member which heats an image on a recording material;
- a temperature sensor which is attached to the apparatus main body and detects the temperature of the heating member through an opening formed in an outer casing of the fixing unit;
- and
- an elastic seal which has a ring shape, which is arranged so that a position of a hole of the ring aligns with a position of the opening of the fixing unit in a state where the fixing unit has been attached to the apparatus main body, and which surrounds a space between the opening of the fixing unit and the temperature sensor in the state where the fixing unit has been attached to the apparatus main body.
2 more elements
An image forming apparatus comprising:
- an apparatus main body;
- an image fixing unit which is detachably provided for the apparatus main body and has a heating member which heats an image on a recording material;
- a temperature sensor which is attached to the apparatus main body and detects the temperature of the heating member through an opening formed in an outer casing of the fixing unit, wherein a virtual line connecting the temperature sensor and a center of the opening of the fixing unit in the state where the fixing unit has been attached to the apparatus main body crosses the direction in which the fixing unit is attached to the apparatus main body;
- a sealing member which has a ring shape, which is arranged so that a position of a hole of the ring aligns with a position of the opening of the fixing unit in a state where the fixing unit has been attached to the apparatus main body, and which surrounds a space between the opening of the fixing unit and the temperature sensor in the state where the fixing unit has been attached to the apparatus main body;
- and
- an urging member which urges the sealing member toward the fixing unit side.
3 more elements
Dependencies are inferred from the claim text.