Method and apparatus for providing powder into fibrous web struc

Details Method and apparatus for providing powder into fibrous web struc Method and apparatus for providing powder into fibrous web struc

1987-07-13

1988-12-27

Beck, Shrive

Coating apparatus

With means to deform work

118 72, 118120, 118308, 118312, B05B 1302

Patent

active

047932805

ABSTRACT:
A method and apparatus for incorporating a powder into a continuous fibrous web containing multiple corrugations. In the method, a fibrous web provided with multiple parallel corrugations is continuously passed over a curved surface having an arc with a radius to web thickness ratio of 0.5-3 and the corrugations are opened at their upper side, while any bonded fibers connecting adjacent corrugations together are broken apart. A powder having 50-1000 micron particle size is deposited by gravity into the opened spaces between adjacent corrugations of the web. The deposited powder is then compacted into the fibrous corrugated web by rubbing with a pad moved in an oscillating motion generally perpendicular to the corrugations. The powder filled web is bent in the opposite direction around a roller to break the fibers between the corrugations on the opposite side of the web. The second roller can be made vertically movable so as to convert the web continuous forward motion to an intermittent forward motion.

REFERENCES:
patent: 278212 (1883-05-01), Birge
patent: 619617 (1899-02-01), Reichenbach
patent: 1841539 (1932-01-01), Kleinschmit
patent: 2723937 (1955-11-01), Rice
patent: 3211600 (1965-10-01), Motycka
patent: 3908591 (1975-09-01), Hall
patent: 4415610 (1983-11-01), Choinski

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