Non-recirculating, die supplied doctored roll coater with...

B - Operations – Transporting – 05 – D

Patent

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B05D 1/28 (2006.01) B05C 1/08 (2006.01) B05C 11/10 (2006.01)

Patent

CA 2167923

A coater incorporates a die (42), a reservoir (46), a gravure cylinder (48), and a doctor blade (50) for applying coating fluid to a moving surface (44). The flow rate of coating fluid to the gravure cylinder (48) is controlled to equal the rate at which coating fluid is consumed by the coating process. This eliminates the need to recycle surplus coating fluid. The coating fluid can be quickly and conveniently replaced with a solvent in the reservoir (46) when coating is not being performed to reduce the occurence of coating defects arising from excessive evaporation of solvent and premature solidification of coating fluid.

Applicateur de couche de revêtement comprenant un corps de filière (42), un réservoir (46), un cylindre graveur (48) et une raclette (150) servant à appliquer un fluide de revêtement sur une surface mobile (44). Le débit du fluide de revêtement destiné au cylindre graveur (48) est régulé de manière à être égal au débit de fluide de revêtement consommé par le processus de revêtement, ceci évitant de recycler l'excédent de fluide de revêtement. Lorsqu'on n'effectue pas d'opération de revêtement, on peut rapidement et facilement remplacer le fluide de revêtement par un solvant dans le réservoir (46) afin de réduire l'apparition de défauts de revêtement liés à l'évaporation excessive du solvant et la solidification prématurée du fluide de revêtement.

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