Doctor blade for doctoring a finish layer of PVC on a strip of c

Details Doctor blade for doctoring a finish layer of PVC on a strip of c Doctor blade for doctoring a finish layer of PVC on a strip of c

1987-11-02

1990-01-09

Beck, Shrive

Coating apparatus

Solid member or material acting on coating after application

Running length work

15104S, B05C 1104

Patent

active

048920568

ABSTRACT:
In the manufacture of carpet tiles an inverted strip of carpet has a scrim laid thereover and a base layer of pasty PVC is deposited on the scrim and doctored before being partially cured. Further pasty PVC is then deposited on the base layer and, as the carpet passes beneath a doctor blade, is doctored to a finish layer by the blade. The doctor blade comprises a combination of a downstream straight edged chamfered member with a narrow underface and an upstream comb like member with teeth with rounded undersides and with the width of the teeth not exceeding 25% of the tooth pitch.

REFERENCES:
patent: 2054448 (1936-09-01), Russell
patent: 3669070 (1972-06-01), Wallace

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