Drive roll/idler roll nip release mechanism

Details Drive roll/idler roll nip release mechanism Drive roll/idler roll nip release mechanism

2011-06-28

2011-06-28

Joerger, Kaitlin S (Department: 3653)

Sheet feeding or delivering

Feeding

By means to convey sheet

C271S273000

Reexamination Certificate

active

07967289

ABSTRACT:
A drive roll/idler roll nip release mechanism utilizes the motor used for the drive nip, coupled with one-way clutches, to power the nip release as a sheet is handed off to a downstream nip. A drive shaft is coupled to a first one-way clutch in one direction and an idler cam shaft is coupled to a second one-way clutch in the opposite direction. This allows the idler cam shaft to be driven only when the motor is reversed, and the drive shaft to be driven only when the motor is moving forward. The one-way clutch on the drive shaft allows the drive wheels to freewheel when the motor is reversed in order to engage the nip release. Thus, the nip release is activated while the drive nip continues to rotate in the direction of sheet motion.

REFERENCES:
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patent: 6641130 (2003-11-01), Lee et al.
patent: 6817611 (2004-11-01), DiRamio
patent: 7384043 (2008-06-01), Giese
patent: 7448623 (2008-11-01), Ahn et al.
patent: 7506870 (2009-03-01), Park
patent: 7748695 (2010-07-01), Miura et al.
patent: 7828290 (2010-11-01), Muratani
patent: 2007/0029725 (2007-02-01), Marx et al.
patent: 2008/0265486 (2008-10-01), Schalk et al.
patent: 60077046 (1985-05-01), None

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