Gas separation – Flexible or collapsible bag type – With flow line coupling means
Patent
1976-11-10
1979-06-05
Lutter, Frank W.
Gas separation
Flexible or collapsible bag type
With flow line coupling means
55274, 55378, 55507, 15339, B01D 3502
Patent
active
041572521
ABSTRACT:
A device for forming demonstration cleaning-test bags and for attaching them to vacuum cleaners comprises basically a cylindrical tube adapted for placement over the air-discharge port of a sweeper, and a co-operating plunger for pushing the central area of a flexible filter cloth or sheet into the tube. The end of the plunger has fixed thereto a hook-type VELCRO disc for engagement with a co-operating loop-type VELCRO disc cemented or stitched centrally of the filter sheet. Thus the inserted sheet can be turned inside-out to form a bag but after the sheet margin has been anchored to the outer lip surface of the cylindrical tube by a contracting coil-spring band which is rolled thereover from an annular plunger seat encircling said lip. For adjustment to different sizes of bag-forming sheets, the band-holding plunger-seat can be slidable along the plunger, or the plunger body can be length-adjustably formed from telescoping sections. The plunger handle can be of truncated conical shape to hold a plurality of contractable bands. The plunger body is desirably hollow to hold a quantity of sand, salt, etc., for sprinkling onto a rug as a part of the cleaning demonstration. The cylindrical tube alternately can be attached over the air-intake port (after nozzle removal) to demonstrate sweeper suction strength.
REFERENCES:
patent: 1075903 (1913-10-01), Dewey
patent: 2093991 (1937-09-01), Boyer
patent: 2315109 (1943-03-01), Cutter
patent: 3203551 (1965-08-01), Van Loan, Jr.
patent: 3790986 (1974-02-01), Burger
Lacey David L.
Lutter Frank W.
Staubly Ralph F.
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