Paper coating method

Details Paper coating method Paper coating method

1982-02-08

1984-06-05

McIntosh, John P.

Coating processes

With post-treatment of coating or coating material

Solid treating member or material contacts coating

118410, B05B 312, B05C 502

Patent

active

044528337

ABSTRACT:
An improved method and apparatus for applying a film of coating material on a moving web of paper carried through an application zone, utilize a reservoir of liquid coating material established under pressure between liquid seals at forward and rearward ends of the zone, and a doctor blade loaded against the web rearwardly of the rearward liquid seal. The reservoir is formed by forward and rearward relatively movable, sealed members, the upper edges of which define gaps with the paper web and doctor blade, respectively, in which gaps the liquid seals are formed. Coating material is flowed under pressure and in excess into the application zone to enable a pressurized area of coating material to be developed therein against the web and immediately upstream of the doctor blade, with the excess of coating material overflowing from the zone through the gaps to form the liquid seals. The provision of two overflow routes for excess coating material aids in skipless application of coating on the web.

REFERENCES:
patent: 3063868 (1962-11-01), Brandsma et al.
patent: 3418970 (1968-12-01), Phelps et al.
patent: 3503370 (1970-03-01), Ishiwata et al.
patent: 3518964 (1970-07-01), Nagler
patent: 3897578 (1975-07-01), Kanda et al.
patent: 4171761 (1979-10-01), Boldt et al.
patent: 4250211 (1981-02-01), Damrau et al.

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