Method and apparatus for impregnating a porous substrate with fo

Details Method and apparatus for impregnating a porous substrate with fo Method and apparatus for impregnating a porous substrate with fo

1982-06-14

1991-04-23

Lawrence, Evan K.

Coating processes

Foraminous product produced

427209, 8477, 68200, 118 44, 118410, 118411, 118415, B05D 126, B05D 306, B05C 300, B05C 318

Patent

active

050099329

ABSTRACT:
A method and apparatus for impregnating a porous substrate with foam, the method comprising transporting the porous substrate through a nip region defined by a rotating foraminous drum and a foam discharge head, the foam discharge head comprising one or more discharge openings, supplying foam to the discharge head with pressure sufficient to discharge foam through the discharge openings to impregnate the porous substrate, and urging the foam discharge head and the foraminous drum toward each other to compress the porous substrate as it passes the discharge openings. The foam discharge head is mounted to a hinged plate to enable the urging of the discharge head toward the foraminous drum.

REFERENCES:
patent: 3084661 (1963-04-01), Roberts
patent: 3533834 (1970-10-01), Marzocchi
patent: 3738265 (1973-06-01), Saueressig
patent: 3969780 (1976-07-01), Henderson
patent: 4023526 (1977-05-01), Ashmus et al.
patent: 4090469 (1978-05-01), Roberts, Jr.
patent: 4188355 (1980-02-01), Graham et al.
patent: 4237818 (1980-12-01), Clifford et al.
patent: 4288475 (1981-09-01), Meeker
patent: 4305169 (1981-12-01), Vidalis
"Foam Processing for Dyeing and Finishing," Shirley Institute Publication S42, Apr. 15, 1981, Didsbury, Manchester, U.K.

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