Coating device for paper webs having a coating application space

Details Coating device for paper webs having a coating application space Coating device for paper webs having a coating application space

1989-05-04

1990-06-05

Beck, Shrive

Coating apparatus

Immersion or work-confined pool type

Work-confined pool

427356, B05C 302

Patent

active

049304372

ABSTRACT:
Formed on the doctor element, between a chamber mouth and the paper web respectively the backing roll supporting it, is an application space which relative to the doctor element, that is, on the entrance side of the paper web, is defined by a baffle plate and kept at a pressure which exceeds atmospheric pressure. Between the baffle plate, this application space 2 is subdivided toward the doctor element (coating blade) 1, creating between the end of the vane 2 and the coating blade 1 a gap whose width ranges between 4 mm and 10 mm. This makes it possible to produce a flawless coating application also in the case of very light basis application weights.

REFERENCES:
patent: 4250211 (1981-02-01), Damrau et al.
patent: 4405661 (1983-09-01), Alheld
patent: 4702196 (1987-10-01), Kratzberger
patent: 4834018 (1989-05-01), Sollinger et al.
Eklund et al.; "The Characteristics of Flow in a Short-Dwell Coater"; Tappi Journal; May 1986; pp. 56-58.

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