Plastic and nonmetallic article shaping or treating: processes – With measuring – testing – or inspecting – Controlling fluid pressure in direct contact with molding...
Patent
1995-03-21
1997-02-04
Tentoni, Leo B.
Plastic and nonmetallic article shaping or treating: processes
With measuring, testing, or inspecting
Controlling fluid pressure in direct contact with molding...
264103, 2642108, 264555, B29C 4792, D01D 5098
Patent
active
055994881
ABSTRACT:
A process for drawing curtain filament bundles comprises the steps of:
a) introducing the filament bundles together with aspirated gas into an injector which is rectangular in horizontal section and partially drawing the filament bundles in the injector,
b) fully drawing the filament bundles in a drawing shaft which adjoins the injector and consists of two parallel and close-distance plates,
c) monitoring the pressure profile in the drawing shaft with a plurality of pressure measuring devices arranged in the form of a grid, and
d) setting a desired pressure profile in the drawing shaft by local variation of the geometry and/or the amount of drawing gas in the drawing shaft.
REFERENCES:
patent: 3655862 (1972-04-01), Dorschner et al.
patent: 3802817 (1974-04-01), Matsuki et al.
patent: 4340563 (1982-07-01), Appel et al.
patent: 4627811 (1986-12-01), Greiser et al.
patent: 4692106 (1987-09-01), Grabowski et al.
patent: 4812112 (1989-03-01), Balk
patent: 4838774 (1989-06-01), Balk
Vliesstoffe, J. Lunenschlosse et al, S. 106-108, G. Thieme Verlag, 1982.
Hoechst Aktiengesellschaft
Tentoni Leo B.
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