Machine for forming lignocellulosic fiber mats

Details Machine for forming lignocellulosic fiber mats Machine for forming lignocellulosic fiber mats

1976-02-25

1977-07-12

Flint, Jr., J. Howard

Plastic article or earthenware shaping or treating: apparatus

Air felting type shaping means

Means forming running length product

425224, B29J 500

Patent

active

040351211

ABSTRACT:
Resin treated lignocellulosic fibers are conveyed by a stream of air downwardly to a separator containing one or more doffing rolls, which rotate adjacent a perforated scroll assembly. At the side opposite the doffers the assembly is connected to a vacuum supply which draws dust and foreign particles out of the fibers as they fall downwardly through the separator and into a hopper located in the rear of a feeder assembly housing. From here the fibers are fed by endless belts or aprons to an expansion chamber formed in the rear of a condenser housing containing one above the other a pair of endless condensers or screens. The fibers cascade downwardly in the expansion chamber to a generally wedge-shaped air bridge formed at the inlet end of the space formed between the confronting runs of the condensers. This space is connected to a pair of suction fans so that the fibers are slightly compacted as they are sucked by the fans through the throat of the air bridge and deposited on the confronting runs of the screen condensers. These two runs travel continuously toward the discharge end of the housing to produce an endless mat of fibers at the output. The upper belt is also mounted for vertical adjustment to vary the thickness of the mat.

REFERENCES:
patent: 3356780 (1967-12-01), Cole
patent: 3671210 (1972-06-01), Richardson
patent: 3737265 (1973-06-01), Schafer et al.
patent: 3792943 (1974-02-01), Helgesson

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