Dual chamber film applicator with in-pond overflow

Details Dual chamber film applicator with in-pond overflow Dual chamber film applicator with in-pond overflow

1995-10-02

1998-04-07

Lamb, Brenda A.

Coating apparatus

Immersion or work-confined pool type

Work-confined pool

118419, B05C 302

Patent

active

057359571

ABSTRACT:
An applicator head is positioned beneath a backing roll and has a housing divided into three sections. A first coating pond is defined between an overflow barrier and a first wall. A converging plate extends between the first wall and a second wall, and converges toward the substrate, and a second pond is defined between the plate and an end wall. Coating is introduced to both ponds. A low pressure cavity is defined beneath the converging plate and between the first wall and the second wall. The cavity opens to the second pond, and draws air and excess coating from the second pond. The substrate is prewetted as it passes through the first pond, and coating deprived of entrained air is applied to the substrate in the second pond. Coat weight uniformity and increased machine speeds are thus achievable.

REFERENCES:
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patent: 4369731 (1983-01-01), Damrau
patent: 4643127 (1987-02-01), Wanke
patent: 4688516 (1987-08-01), Sommer
patent: 4761309 (1988-08-01), Embry
patent: 4834018 (1989-05-01), Sollinger et al.
patent: 4839201 (1989-06-01), Rantanen et al.
patent: 4860686 (1989-08-01), Kato et al.
patent: 4903632 (1990-02-01), Sollinger
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patent: 5183691 (1993-02-01), Hassell et al.
patent: 5192591 (1993-03-01), Chance
patent: 5199991 (1993-04-01), Chance
patent: 5366551 (1994-11-01), Aidun
"BA1500.TM. Coater: Versatile, high speed blade applicator produces quality coated papers," a brochure by Rader Companies, a division of Beloit Corporation.
"New Coating Technologies Combine High Speeds With Higher Quality," an article in Pulp & Paper by Andy Harrison pp. 60-64--May 1994.

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