Vacuum hold down conveyor system with reduced net downward force

Details Vacuum hold down conveyor system with reduced net downward force Vacuum hold down conveyor system with reduced net downward force

1996-09-06

1998-07-14

Skaggs, H. Grant

Sheet feeding or delivering

Feeding

By means to convey sheet

271197, 1986891, B65H 502

Patent

active

057792364

ABSTRACT:
A vacuum hold down conveyor system employing a vacuum table with a plurality of suction grooves and relief grooves extending parallel to a direction of travel. A vacuum generator is fluidly connected to the suction grooves to create a sub-ambient pressure in the suction grooves. A belt is translatable relative to the vacuum table to simultaneously occlude the suction and the relief grooves. The relief grooves are exposed to a pressure greater than the suction grooves to thereby reduce the net downward force on the belt as it translates across the vacuum table.

REFERENCES:
patent: 3198517 (1965-08-01), Martin
patent: 3889801 (1975-06-01), Boyer
patent: 4207579 (1980-06-01), Gamblin et al.
patent: 5139253 (1992-08-01), Bohme et al.

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