B - Operations – Transporting – 05 – C
Patent
B - Operations, Transporting
05
C
B05C 5/02 (2006.01) D21H 23/34 (2006.01) D21H 23/38 (2006.01)
Patent
CA 2105953
ABSTRACT OF THE DISCLOSURE A device for predosing coating composition on a traveling web of paper. A guide member extende obliquely toward the web. Downstream in the path of the web past the guide member, a doctor element is supported spaced from the tip of the guide member for defining a pressure space between the a guide member and the doctor element. Coating composition is fed through a feed channel between the guide member, on the one hand, and the doctor element and the supports for the doctor element up to the pressure space, on the other hand. An exit slot from the defined at the tip of the guide member. The guide member has a guide surface down from the tip of the guide member, on the side of the guide member away from the doctor element which faces generally toward the web. The guide surface defines a return channel for coating composition that has moved out of the pressure space and through the slot. The guide surface is gradually inclined so that the return channel gradually enlarges away from the tip of the guide member and the return channel serves as a pressure reduction space for the excess coating composition. The doctor element may be in the form of a doctor bar or a coating blade with an angle of application against the web of at most 40°.
Gottwald Ingo
Kustermann Martin
Ueberschar Manfred
J.m. Voith Gmbh
Mccarthy Tetrault Llp
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