Media velocity, media present and bubble control in an...

Details Media velocity, media present and bubble control in an... Media velocity, media present and bubble control in an...

2011-08-23

2011-08-23

Gray, David M (Department: 2852)

Electrophotography

Control of electrophotography process

Control of fixing

C399S361000

Reexamination Certificate

active

08005388

ABSTRACT:
In an image forming device, the actual speed of a media sheet through a fuser is detected and the fuser speed is controlled so as to maintain a bubble in the media sheet within predetermined limits. A media sheet speed sensor is disposed downstream of the fuser nip. The sensor may be a rotary optical encoder generating a signal comprising a series of pulses, the spacing of the pulses indicative of the speed of at least the leading edge of a media sheet actuating the sensor. Based on the actual speed of the media sheet, the speed of the fuser is adjusted to maintain a desired bubble in the media sheet, when the media sheet is engaged by both the fuser nip and another nip in the media path, such as a toner transfer nip.

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patent: 08146683 (1996-06-01), None

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