Minimizing voids in foam coating

Details Minimizing voids in foam coating Minimizing voids in foam coating

1981-10-29

1983-06-07

Lusignan, Michael R.

Coating processes

With stretching or tensioning

Running lengths

118407, 118413, 118414, 118415, 427358, 427359, 427428, 427356, B05D 312, B05C 318

Patent

active

043871186

ABSTRACT:
A method and apparatus for foam coating a web are provided that allow for easier cleaning, greater versatility of fabric styles without the introduction of voids in the foam backing, and elimination of voids in the foam backing at seams, or within the web length, due to wrinkling or creasing of the fabric. A doctor blade is provided on top of and slightly in front of a roller, and a foam pillow is formed at the top of the roller, with the fabric providing a bottom barrier for the pillow. The fabric is continuously fed passed a slat expander, which removes wrinkles from it, and then immediately into contact with the periphery of the roller, the roller holding the fabric taut. Needle points can be provided on the fabric peripheral surface to facilitate positive holding of the cloth in place.

REFERENCES:
patent: 1909482 (1932-03-01), Barrett
patent: 2969578 (1961-01-01), Lembo
patent: 3042989 (1961-05-01), Foley
patent: 3273535 (1964-10-01), Krikorian
patent: 3710755 (1973-01-01), Hakanson
patent: 4016831 (1977-04-01), James et al.
patent: 4257343 (1981-03-01), Kullander

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