Self adjusting sheet gripping apparatus

Details Self adjusting sheet gripping apparatus Self adjusting sheet gripping apparatus

1993-04-19

1996-05-21

Grimley, Arthur T.

Sheet feeding or delivering

Feeding

By means to convey sheet

271 82, 271204, 2941193, 355309, 355317, B65H 502, B65H 504, G03G 2100

Patent

active

055182313

ABSTRACT:
An apparatus for gripping a sheet includes a first gripping member and a second gripping member, one or both of which are equipped with one or more inflatable self adjusting gripper pads or tubes. The inflatable gripper pad provides a more efficient, reliable and cost effective method for the first gripping member and the second gripping member to cooperate together so as to releasably grip a sheet in a printing or copying machine. A spring and cam following system may be used to move the first gripping member in relation to the second gripping member. A mechanical or electromechanical pump may be used to inflate and deflate the inflatable gripper pads so as to provide the gripping action on the sheet or so as to vary the gripping pressure created by a spring and cam system. The self adjusting inflatable gripper pads of the present invention permit a uniform force distribution or pressure to be applied along the entire length of the sheet grasping nip formed by the first gripping member and the second gripping member.

REFERENCES:
patent: 4155305 (1979-05-01), Heissler et al.
patent: 4497482 (1985-02-01), Furze et al.
patent: 4629176 (1986-12-01), Ceelen
patent: 5128726 (1992-07-01), Cassano et al.
patent: 5276493 (1994-01-01), Hediger et al.

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