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US 4,055,462 AGranted
Apparatus for forming a fiber oriented handsheet
AssigneeWestvaco Corporation
InventorsThomas C. Hsu, John L. Miller
Life of this patent
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Abstract
The fiber orientation of fourdrinier laid machine made paper is simulated with a bench top handsheet mold by means of a two-axis flow convergent nozzle asymmetrically positioned in the slurry reservoir box of the mold. When a pulp slurry is drained of water, a strong flow stream vector component parallel with the forming wire plane is generated within the flow stream as the slurry flows inductively over the nozzle surfaces and from the nozzle throat.
Claims5
An apparatus for forming a paper handsheet having a substantially unidirectional fiber orientation from a dilute slurry of paper pulp comprising
- a pulp reservoir vessel constructed substantially symmetrical about a vertical drain axis,
- a sink vessel disposed beneath said pulp vessel,
- a horizontal forming wire separating said pulp vessel from said sink vessel,
- a valved conduit drain from said sink, the improvement comprising:
- substantially rectangular thin liner means of substantially uniform section transverse of said drain axis inserted within said pulp vessel, and
- first and second flow guide surfaces within said liner means forming a two-dimensional convergent nozzle therein having a planar throat area positioned in the proximity of said forming wire and asymmetrical of said drain axis, the plane of said throat disposed at an acute angle relative to said drain axis.
3 more elements
Dependencies are inferred from the claim text.