Curtain coating start/finish method and apparatus

Details Curtain coating start/finish method and apparatus Curtain coating start/finish method and apparatus

1990-08-08

1991-05-21

Beck, Shrive

Coating processes

Falling curtain of coating material utilized

118300, 118DIG4, B05D 130

Patent

active

050174088

ABSTRACT:
A novel method and apparatus is disclosed for the coating of a support or moving web using curtain coaters during the start-up and shut-down of a free falling liquid curtain. The apparatus is typically a catch pan positioned between a first and second edge guide and in close proximity to a support. The catch pan includes a main catch pan surface and first and second opposing sides each having a shim projecting out along the upper edge thereof and into contact with the first and second edge guides, respectively. Each shim strips liquids from the adjacent edge guide, and then directs such liquids onto the catch pan surface during start-up and shut-down without the deposition of excess liquids on the support, web, or coating roller. Means are provided for retracting the catch pan and controlling the falling curtain during start-up, and for inserting the catch pan for intercepting the falling curtain during shut-down.

REFERENCES:
patent: 4922851 (1990-05-01), Morikawa et al.

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