Apparatus for applying a liquid or pasty medium onto a moving ma

Details Apparatus for applying a liquid or pasty medium onto a moving ma Apparatus for applying a liquid or pasty medium onto a moving ma

1995-12-22

1997-11-04

Czaja, Donald E.

Coating apparatus

Solid applicator contacting work

With work-handling or work-supporting

118249, 118255, 118257, B05C 108

Patent

active

056835094

ABSTRACT:
Several embodiments of an apparatus for applying a liquid or pasty medium e.g. a coating medium onto a moving material web of paper or board are disclosed. All embodiments include a first flexible endless loop belt having an inner surface that passes in contact with a sliding surface of a concave pressing shoe and an outer surface which contacts and moves a web through a press nip. In some embodiments, there is an opposing roll rotating along with the endless belt through the nip. Various devices can apply liquid or pasty medium onto the surface of the belt or the surface of the opposing roll. In an alternate apparatus, there are two counter rotating flexible endless belts which form the press nip between them through which the web is guided. The belts are pressed against each other by elongate guiding surfaces of respective pressing shoes inside the loops of the belts. These embodiments provide a longer length nip in the web travel direction to avoid film splitting during coating of the material web.

REFERENCES:
patent: 3866566 (1975-02-01), Jones
patent: 4563245 (1986-01-01), Wanke et al.
patent: 5409534 (1995-04-01), Kustermann
patent: 5466292 (1995-11-01), Kustermann

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