Method and apparatus for applying a coating solution
AssigneeAgfa-Gervaert AG
InventorsUwe Gartmann, Hermann Idstein, Guenter Hultzsch
Life of this patent
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Abstract
Apparatus and method for applying a coating solution to a running substrate using a slot die having two die lips forming a gap therebetween. The gap also defines an outlet for releasing the coating solution to the substrate. The lips have plurality of manifold chambers communicating with gas feeder and coating solution feeder provided in the die lips. The manifold chambers communicate with the outlet. The width of the coating solution is adjustable with the gas pressure applied to the gas feeder.
Claims18
An apparatus for applying a coating solution to a running substrate, comprising:
- a pair of die lips forming a slot die which contains a die gap between the die lips;
- a mask positioned in the die gap, the mask having gap limitations and separating webs between the gap limitations to control a width of coating solution applied on the running substrate, whereby the coating solution is guided laterally by one of the gap limitations and at least one of the separating webs;
- gas feeding means in at least one of the die lips;
- coating solution feeding means in at least one of the die lips;
- at least one manifold chamber in at least one of the die lips and communicating directly with the coating solution feeding means and the gas feeding means;
- and
- an outlet at the end of said die gap, said die gap communicating with the manifold chamber for releasing the coating solution on to the running substrate.
A slot die comprising:
- a pair of die lips with a gap therebetween;
- a mask positioned in the gap, the mask having gap limitations and separating webs between the gap limitations to control a width of a coating solution to be applied on a running substrate, whereby the coating solution is guided laterally by one of the gap limitations and at least one of the separating webs;
- gas feeding means in at least one of the die lips;
- coating solution feeding means in at least one of the die lips;
- at least one manifold chamber in at least one of the die lips and communicating directly with the coating solution feeding means and the gas feeding means;
- and
- an outlet at the end of said die gap, said die gap communicating with the manifold chamber.
A method of applying a coating solution to a running substrate, comprising the steps of:
- providing an apparatus comprising:
- a pair of die lips forming a slot die which contains a die gap between the die lips;
- a mask positioned in the die gap, the mask having gap limitations and separating webs between the gap limitations to control a width of coating solution applied on the running substrate, whereby the coating solution is guided laterally by one of the gap limitations and at least one of the separating webs;
- gas feeding means in at least one of the die lips;
- coating solution feeding means in at least one of the die lips;
- at least one manifold chamber in at least one of the die lips and communicating directly with the coating solution feeding means and the gas feeding means;
- and an outlet at the end of said die gap, said die gap communicating with the manifold chamber for releasing the coating solution on to the running substrate;
- introducing gas through at least one of the die lips;
- introducing the coating solution through at least one of the die lips;
- communicating at least one of the manifold chambers directly with the gas and the coating solution;
- and
- releasing the coating solution through the outlet.
Dependencies are inferred from the claim text.