Expanding body for use in a headbox or a stationary support devi

Details Expanding body for use in a headbox or a stationary support devi Expanding body for use in a headbox or a stationary support devi

1988-08-16

1989-09-19

Hastings, Karen

Paper making and fiber liberation

Apparatus

Running or indefinite length product forming and/or treating...

162336, 162344, 162352, D21F 102, D21F 154

Patent

active

048678473

ABSTRACT:
Expanding body which is essentially designed as a hollow beam and, viewed in the cross-section, composed of several flexible walls. At least one of these walls has a higher expandability than the other walls. The internal chamber of the expanding body can be pressurized by a variable fluid pressure. On the use of such an expanding body in a paper machine headbox a wall with a relatively low expandability forms the downstream end piece of a flow guide wall. Its position, which determines the clear width of the discharge opening, is alterable by varying the internal pressure.

REFERENCES:
patent: 2928464 (1960-03-01), Western et al.
patent: 3017930 (1962-01-01), Dunlap
patent: 3027940 (1962-04-01), Dunlap
patent: 3497420 (1970-02-01), Clark
patent: 4162937 (1979-07-01), Corbellini
patent: 4358347 (1982-11-01), Nuttall

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