Fibrous material moulding apparatus

Details Fibrous material moulding apparatus Fibrous material moulding apparatus

A - Human Necessities

24

D

92/7, 131/80

A24D 3/00 (2006.01) A24D 3/02 (2006.01) D21J 3/00 (2006.01) D21J 3/06 (2006.01) D21J 7/00 (2006.01)

Patent

CA 1053949

Abstract of the Disclosure A process for continuously forming a fibrous element In an elongate closed foraminous former during movement of the former through fluid extraction means. The process forming a fibrous dispersion and injecting the dispersion into the former. A pressure gradient Is generated across an extraction zone within the fluid extraction means. The fibrous dispersion is injected into the former at an injection velocity relative to the speed of the former (efflux ratio) to cause some of the fibres to build up as a fibrous mat on the inner surface of the former. The remainder pack together to form a core so as to produce a continuous fibrous element having a fibrous core which is enclosed by a crust of greater density. The element is particularly useful as a cigarette filter of high structural integrity that does not require further surface treatment such as wrapping.

283837

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