Fibrous material moulding apparatus

Details Fibrous material moulding apparatus Fibrous material moulding apparatus

1979-02-16

1981-03-24

Czaja, Donald E.

Plastic article or earthenware shaping or treating: apparatus

With foraminous or absorbent means for removal of vehicle or...

425 85, 264121, B28B 126

Patent

active

042577543

ABSTRACT:
Apparatus for making a fibrous element includes an elongate foraminous former provided by at least one foraminous belt, with a foraminous forming chamber through which said belt passes and which is formed to a hollow shape thereby. The belt is driven through the forming chamber, and fluid is extracted in a fluid extraction zone which surrounds at least part of the forming chamber and formed by a closed drainage casing. An injection nozzle injects a fibrous dispersion into the former within said forming chamber with the injection nozzle being dimensioned so as to substantially exclude the ingress of air around an interface with the walls of said belt so that the apparatus produces an elongate fibrous element having an outer core of greater density than the inner core which it surrounds.

REFERENCES:
patent: 3377220 (1968-04-01), Berger et al.
patent: 3819435 (1974-06-01), Roberts
patent: 3882211 (1975-05-01), Kamp
patent: 3999912 (1976-12-01), Hall

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