Method and apparatus for producing chopped strands

Details Method and apparatus for producing chopped strands Method and apparatus for producing chopped strands

1984-05-24

1985-08-27

Lindsay, Robert

Glass manufacturing

Processes

Forming product or preform from molten glass

65 2, 65 102, 427289, 427375, C03C 2502

Patent

active

045376107

ABSTRACT:
Method for producing discrete bundles of filaments includes applying a non-aqueous, hot melt coating material to continuous filaments and gathering the coated continuous filaments into a bundle. The coating material is solidified on the continuous filament bundle so as to establish a first cross-sectional shape and the bundle is then severed into discrete segments whereby the bundle segments are deformed so as to exhibit a second cross-sectional shape at the severed regions. The bundle segments are then heated sufficiently to soften the coating material to permit the bundle segments to substantially return to the first cross-sectional shape.
The apparatus of the invention includes a primary applicator for applying a production coating to the filaments and an interim applicator for applying a start-up coating to the filaments. Structures are provided to orient the filaments between a production position wherein the filaments contact the primary applicator but not the interim applicator and a start-up position wherein the filaments contact the interim applicator but not the primary applicator.

REFERENCES:
patent: 3273987 (1966-09-01), Marzocchi et al.
patent: 3869268 (1975-03-01), Briar et al.
patent: 3887347 (1975-06-01), Reese
patent: 4043779 (1977-08-01), Schaefer

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