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US 5,493,378 AGranted
Image forming apparatus having a multispeed heated pressure fuser and method of use
AssigneeEastman Kodak Company
InventorsFeraydoon S. Jamzadeh, James R. Flick, David J. Reed
Life of this patent
Estimating the term…
Abstract
A toner image carried by a receiving sheet is fused by heat and pressure applied by first and second fusing members. To compensate for heat lost from the pressure member to the receiving sheet, the fuser has at least two speeds, a first fast speed, which is utilized for the first revolution of the fusing member contacting the toner image and a second slower speed to which the fuser is changed at the end of such first revolution.
Claims10
A method of forming a fixed toner image on a receiving sheet, said method comprising:
- forming an unfixed toner image on a receiving sheet,
- feeding the receiving sheet into a nip formed by first and second fusing members, at least one of which is heated, with the first fusing member having an endless surface with a predetermined intrack circumference, which surface contacts the toner image in the nip, and
- driving the fusing members at a first speed to move the receiving sheet through the nip until said endless surface begins to contact the toner image for a second time, then driving the fusing members at a second speed less than the first.
Image forming apparatus including:
- means for forming a toner image on a receiving sheet,
- means for fixing the toner image, said fixing means including,
- first and second pressure fusing members positioned to form a fusing nip, said first pressure fusing member having a fusing surface with a predetermined circumference,
- means for heating at least the first pressure fusing member,
- drive means adjustable between a first speed and a second speed slower than the first speed, for driving the fusing members,
- means for feeding the receiving sheet with the toner image into the fusing nip, and
- means for adjusting the drive means to drive the receiving sheet at its first speed as an intrack length of the receiving sheet equal to the predetermined circumference passes through the fusing nip and to drive the receiving sheet at the second speed thereafter.
4 more elements
Dependencies are inferred from the claim text.