Stopping device for air conveyor

Details Stopping device for air conveyor Stopping device for air conveyor

1975-02-06

1976-08-17

Blunk, Evon C.

Cutlery

193 40, 214 1BE, 226195, 271183, 271195, B65G 5102, B65G 5358

Patent

active

039750574

ABSTRACT:
Disclosed is an air conveyor comprised of a deck having multiple openings and an underlying plenum containing air under pressure. The air from the plenum issues through the openings as jets to lift articles and advance them along a predetermined path spaced above the deck. To stop the articles, a second plenum is disposed within the first mentioned plenum and in communication with the openings through the conveyor deck at a location at which the article is to be stopped. A normally open valve provides communication between the first and second plenums whereby air under pressure in the first plenum passes into the second plenum and out through the openings in the conveyor deck for lifting and advancing the articles on the conveyor similarly as accomplished by the air issuing through the other openings in direct communication with the first plenum. A normally closed second valve commmunicates between a vacuum pressure source and the second plenum. Upon closing the first valve and opening the second valve, a vacuum pressure is applied across the opening in the deck overlying the second plenum whereby the articles are slowed, drawn down against the conveyor deck, and stopped.

REFERENCES:
patent: 2538972 (1951-01-01), Magnani
patent: 3180688 (1965-04-01), Futer
patent: 3190460 (1965-06-01), Rubin
patent: 3603646 (1971-09-01), Leoff
patent: 3717381 (1973-02-01), Hagler

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