Image forming apparatus which detects jam and jam detecting...

Details Image forming apparatus which detects jam and jam detecting... Image forming apparatus which detects jam and jam detecting...

2006-04-04

2006-04-04

Chau, Minh (Department: 2854)

Electrophotography

Diagnostics

Document handling

C399S016000, C400S708000

Reexamination Certificate

active

07024124

ABSTRACT:
A reference time ts, which corresponds to a period of time a sheet S needs to move passed a detection position P1where a sheet detection sensor841is disposed, is set in advance in accordance with the length of the sheet S. After a time t1from the start of driving of a gate roller, as the leading edge of the sheet S transported to a nip area N which is between the heater roller91and a pressurizing roller92arrives at the detection position P1, an output from the sheet detection sensor841changes to an L-level. When the transportation of the sheet has been normal, the sensor output returns to an H-level after a reference time ts or a longer time. On the contrary, upon occurrence of a jam J2that the sheet S has got wrapped around the heater roller91, the leading edge of the sheet S moves backward, and therefore, a duration tm in which the sensor output is kept at the L-level becomes shorter than the reference time ts.

REFERENCES:
patent: 4084900 (1978-04-01), Yamaoka et al.
patent: 4307957 (1981-12-01), Kitagawa et al.
patent: 5485247 (1996-01-01), Morishita et al.
patent: 5639171 (1997-06-01), Brewster et al.
patent: 5970274 (1999-10-01), Rath
patent: 6381441 (2002-04-01), Byeon et al.
patent: 2002/0149661 (2002-10-01), Konno
patent: 4-110880 (1992-04-01), None
patent: 2858441 (1999-02-01), None

Affiliated with

Also associated with

Rating

Image forming apparatus which detects jam and jam detecting... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Image forming apparatus which detects jam and jam detecting..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Image forming apparatus which detects jam and jam detecting... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3547412