Apparatus for generating a vacuum

Details Apparatus for generating a vacuum Apparatus for generating a vacuum

1997-04-15

1999-11-09

Kramer, Dean

Sheet feeding or delivering

Feeding

Separator and conveyor

271102, 271106, B65H 3902

Patent

active

059798890

ABSTRACT:
Apparatus (10) for engaging at least a portion (20b) of a signature (20a) in a hopper (14) and moving the portion relative to a stack of signatures (20) in the hopper includes a stem member (110) and a suction cup (150) mounted on the stem member. The stem member (110) is supported for movement toward and away from the stack of signatures (20) A venturi tube (160) is provided in the stem member (110) for generating a vacuum which is communicated to the suction cup (150). The vacuum in the suction cup (150) causes the portion (20b) of a signature (20a) to be gripped by the suction cup (150) and moved relative to the stack of signatures (20) in the hopper (14) upon movement of the stem member (110).

REFERENCES:
patent: 3591167 (1971-07-01), Norbutas
patent: 3884368 (1975-05-01), Ballard
patent: 3998448 (1976-12-01), Gray et al.
patent: 4157692 (1979-06-01), Brocklehurst et al.
patent: 4531723 (1985-07-01), Watson
patent: 4830352 (1989-05-01), Birtwhistle
patent: 4958824 (1990-09-01), Willits et al.
patent: 4986524 (1991-01-01), Meintzer et al.
patent: 5603599 (1997-02-01), Wesslen et al.

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