Double suction unit

Details Double suction unit Double suction unit

1974-09-30

1976-07-13

Christian, Leonard D.

Brushing, scrubbing, and general cleaning

Machines

With air blast or suction

417174, A47L 518

Patent

active

039685381

ABSTRACT:
An apparatus for removing both cut threads and trimmed edges from the working area of a sewing machine with a unit having a first air passage coupled to the area for removing trimmed edges, a second air passage coupled to the area for removing trimmed edges and opening into the first passage at an acute angle in an elliptically shaped opening to inject an air stream into the first passage to transfer momentum and cause air flow, the second passage comprising two tubular members one inside the other with the outer opening into the first passage, and a third air passage injecting air at a pressure above atmospheric pressure at an angle in an elliptically shaped opening to transfer momentum and create air flow through said second passage.

REFERENCES:
patent: 1817337 (1931-08-01), Baker
patent: 2923959 (1960-02-01), Huber
patent: 3352348 (1967-11-01), Daviau
patent: 3442086 (1969-05-01), Nieman
patent: 3558240 (1971-01-01), Snodgrass

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