Plastic article or earthenware shaping or treating: apparatus – Air felting type shaping means – With particle liberating means
Patent
1982-02-24
1983-06-28
Hall, James R.
Plastic article or earthenware shaping or treating: apparatus
Air felting type shaping means
With particle liberating means
425 831, 425297, B29C 1300
Patent
active
043903363
ABSTRACT:
An improvement in the apparatus for the production of air laid fiberglass mat is provided. Fiberglass strands from bobbins, rovings or other sources are fed into a chopper assembly for chopping into smaller in length strands. The smaller in length strands then drop by gravity from the chopper assembly and are picked up by an air stream created by a fan or blower located below the chopper assembly. This air stream directs these smaller in length strands into the inlet of the fan or blower. In an alternative, already chopped strands could be fed directly into the inlet of the fan or blower eliminating the need for the chopper assembly. Fan or blower blades then work on these smaller in length fiberglass strands as they pass from the inlet to the exit of the fan or blower to open or fluff said smaller in length fiberglass strands into partially opened strands. The partially opened strands are then directed by the air stream caused by the air stream caused by the fan or blower through an expanding duct. After the partially opened exit the expanding duct the air stream causes the partially opened strands to be deposited onto a moving foraminous conveyor to form an air laid glass mat of uniform thickness. Since the air stream created by the fan or blower is allowed to continue through the foraminous conveyor and there is a vacuum applied from behind the foraminous conveyor, and opposite the outlet of the expanding duct, a uniform deposit of partially opened fiberglass strands onto the conveyor is assured.
REFERENCES:
patent: 3403425 (1968-10-01), Tajima et al.
patent: 3543351 (1970-12-01), George
patent: 3918126 (1975-11-01), Wood
patent: 4123211 (1978-10-01), Rudloff
GAF Corporation
Hall James R.
Magee, Jr. J.
Mohr J. G.
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