Vacuum system for feeding sheets

Details Vacuum system for feeding sheets Vacuum system for feeding sheets

1988-10-07

1990-09-18

Rolla, Joseph J.

Sheet feeding or delivering

Feeding

Separators

271194, 271 96, 417286, 60422, B65H 308, F16D 3102, F04B 4908

Patent

active

049572830

ABSTRACT:
A pneumatic system which in the preferred embodiment includes a pump having a primary suction port and a secondary suction port, with the pump being operable for generating vacuum pressures at both such ports. A first vacuum operated system is coupled to the primary suction port and a second vacuum operated system is coupled to the secondary suction port, and a predetermined, preferably selectively adjustable, orifice is established between the first and second vacuum operated systems for enabling vacuum airflow generated at the first suction port to augment the airflow through the second vacuum operated system. In an alternative embodiment, separate standard vacuum pumps are coupled to the first and second vacuum operated systems.

REFERENCES:
patent: 3716308 (1973-02-01), Kobald
patent: 3841095 (1974-10-01), Baker
patent: 3999795 (1976-12-01), Barker
patent: 4024710 (1977-05-01), Zelle
patent: 4070857 (1978-01-01), Wible
patent: 4513957 (1985-04-01), Schaefer, Jr.
patent: 4640503 (1987-02-01), Naumann

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