Gas separation – Flexible or collapsible bag type – Nested bags or folded wall with spaced or unsecured faces
Patent
1995-12-28
1997-11-25
Bushey, C. Scott
Gas separation
Flexible or collapsible bag type
Nested bags or folded wall with spaced or unsecured faces
55382, 55DIG2, B01D 2927
Patent
active
056907117
ABSTRACT:
In a vacuum bag for a vacuum cleaner having a dirt-laden air outlet, the vacuum bag includes an air-permeable outer bag formed of paper, an air-permeable inner bag formed of meltblown material disposed within the outer bag, and an air-impermeable collar disposed on an outer surface of the outer bag. The inner bag, outer bag and collar define therethrough a channel of given area for passage therethrough of a dirt-laden air outlet into the inner bag. The improvement resides in the vacuum bag additionally including an air-impermeable reinforcement patch formed of flashspun olefin material disposed opposite and at least partially below the channel when the vacuum bag is in use. Thus a portion of the outer bag generally opposite the outlet is protected from penetration and tearing by particles entrained in the dirt-laden air expelled at high speed from the outlet.
REFERENCES:
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patent: 4240813 (1980-12-01), Fesco
patent: 4589894 (1986-05-01), Gin et al.
patent: 5090975 (1992-02-01), Requejo et al.
patent: 5181946 (1993-01-01), Bosses et al.
patent: 5244703 (1993-09-01), Bosses
Bushey C. Scott
Home Care Industries, Inc.
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