Gas separation – Flexible or collapsible bag type – Toroidal or annular bag
Patent
1975-01-28
1976-08-10
Lutter, Frank W.
Gas separation
Flexible or collapsible bag type
Toroidal or annular bag
55368, 55370, 55376, 55380, 55382, 55DIG2, B01D 4602
Patent
active
039739368
ABSTRACT:
A vacuum cleaner filter bag is made of a porous sheet of material which permits penetration and flow therethrough of air. The bag is generally horseshoe-shaped and has a comparably shaped internal cavity. The bag has two tubular leg portions and a tubular connecting portion between the leg portions. An air inlet opening is provided on the connecting portion for admitting a stream of air under pressure into the cavity and an opening, which permits removal of accumulated debris but which is closed during use of the bag, is also provided on the connecting portion. The air flow between the air inlet opening on the vacuum cleaner housing and the inlet opening of an exhaust motor situated within the vacuum cleaner housing generally tends to primarily penetrate or flow through a wall portion of the bag disposed between the respective inlet air openings. An air impervious blocking sheet of material, such as a sheet of vinyl or acetate, is provided on the wall portion to prevent passage of the air therethrough and to thereby prevent accumulation of debris in the bag connecting portion. This assures flow of air into the leg portions of the bag and a more uniform distribution and accumulation of debris throughout the cavity of the bag.
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Howard Sol
Schaaf Robert
Lutter Frank W.
Prunner Kathleen J.
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