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US 8,509,639 B2Granted
Fixing device, image forming apparatus, and method of controlling fixing device
AssigneeRicoh Company, Ltd.
InventorsSatoru Tao, Noritaka Masuda
Life of this patent
Estimating the term…
Abstract
According to one embodiment, transit time taken for a recording medium passing through a nip portion to transit a predetermined distance is measured. A nip width adjusting mechanism adjusts a nip width on the basis of the transit time of the recording medium over the predetermined distance.
Claims12
A fixing device comprising:
- a fixing roller that is driven to rotate;
- a pressing member that is pressed against the fixing roller to form a nip portion;
- a measuring unit that measures transit time taken for a recording medium passing through the nip portion to transit a predetermined distance;
- and
- an adjusting unit that adjusts a fixing condition based on the transit time measured by the measuring unit.
2 more elements
An image forming apparatus comprising a fixing device that includes:
- a fixing roller that is driven to rotate;
- a pressing member that is pressed against the fixing roller to form a nip portion;
- a measuring unit that measures transit time taken for a recording medium passing through the nip portion to transit a predetermined distance;
- and
- an adjusting unit that adjusts a fixing condition based on the transit time measured by the measuring unit.
2 more elements
A method of controlling a fixing device including a fixing roller that is driven to rotate and a pressing member that is pressed against the fixing roller to form a nip portion, the method comprising:
- measuring transit time taken for a recording medium passing through the nip portion to transit a predetermined distance;
- and
- adjusting a fixing condition based on the transit time.
Dependencies are inferred from the claim text.