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US 5,395,653 AGranted
Apparatus and method for controlling coating frowns in hopper coating
AssigneeEastman Kodak Company
InventorWilliam Baum
Life of this patent
Estimating the term…
Abstract
The present invention relates to dual cavity hoppers and is an apparatus and method for controlling frowns. The dual cavity hoppers are provided with adjustable bypass means for providing fluid from the inner cavity to the outer cavity or alternatively for providing fluid directly to the outer cavity. The bypass means can be used on end-fed or center-fed dual cavity hoppers. The uniformity of the laydown across the width of the delivery slot is improved.
Claims18
A method of supplying a coating composition to a moving support comprising:
- (a) providing a coating hopper having an inner cavity and an outer cavity, each cavity having a first end at a first side of the coating hopper and a second end at a second side of the coating hopper, the inner cavity and the outer cavity in fluid communication through a communication slot extending from the first side of the hopper to the second side of the hopper, the hopper having a supply slot in fluid communication with the outer cavity supplying the coating composition to the moving support;
- (b) supplying the coating composition to the inner cavity at the first end;
- and
- (c) adjustably supplying the coating composition to the second end of the outer cavity.
1 more element
A method of applying a coating composition to a moving support comprising:
- (a) providing a coating hopper having an inner cavity and an outer cavity, each cavity having a first end at a first side of the coating hopper and a second end at a second side of the coating hopper, the inner cavity and outer cavity in fluid communication through a communication slot extending from the first side of the hopper to the second side of the hopper, the hopper having a supply slot in fluid communication with the outer cavity supplying the coating composition to the moving support;
- (b) supplying the coating composition to the inner cavity between the first end and the second end;
- (c) providing a first adjustable fluid bypass from the first end of the inner cavity to the first end of the outer cavity;
- and
- (d) providing a second adjustable fluid bypass from the second end of the inner cavity to the second end of the outer cavity.
2 more elements
A method of supplying a coating composition to a moving support comprising:
- (a) providing a coating hopper having an inner cavity and an outer cavity, each cavity having a first end at a first side of the coating hopper and a second end at a second side of the coating hopper, the inner cavity and the outer cavity in fluid communication through a communication slot extending from the first side of the hopper to the second side of the hopper, the hopper having a supply slot in fluid communication with the outer cavity supplying the coating composition to the moving support;
- (b) supplying the coating composition to the inner cavity at the first end;
- and
- (c) adjustably supplying the coating composition from the second end of the inner cavity to the second end of the outer cavity.
1 more element
A method of applying a coating composition to a moving support comprising:
- (a) providing a coating hopper having an inner cavity and an outer cavity, each cavity having a first end at a first side of the coating hopper and a second end at a second side of the coating hopper, the inner cavity and outer cavity in fluid communication through a communication slot extending from the first side of the hopper to the second side of the hopper, the hopper having a supply slot in fluid communication with the outer cavity for supplying the coating composition to the moving support;
- (b) supplying the coating composition to the inner cavity between the first end and the second end from a first means;
- (c) supplying the coating composition to the first end of the outer cavity from a second means;
- and
- (d) supplying the coating composition to the second end of the outer cavity from a third means.
2 more elements
A coating apparatus for supplying a coating composition to a web comprising:
- (a) a coating hopper having an inner cavity and an outer cavity, each cavity having a first end at a first side of the coating hopper and a second end at a second side of the coating hopper, the inner cavity and the outer cavity in fluid communication through a communication slot extending from the first side of the hopper to the second side of the hopper, the hopper having a metering slot in fluid communication with the outer cavity for supplying the coating composition to the web;
- (b) means for supplying the coating composition to the first end of the inner cavity;
- and
- (c) adjustable bypass means for supplying the coating composition from the second end of the inner cavity to the second end of the outer cavity.
1 more element
A coating apparatus for supplying a coating composition to a web comprising:
- (a) a coating hopper having an inner cavity and an outer cavity, each having a first end at a first side of the coating hopper and a second end at a second side of the coating hopper, the inner cavity and outer cavity in fluid communication through a communication slot extending from the first side of the hopper to the second side of the hopper, the hopper having a metering slot in fluid communication with the outer cavity for supplying the coating composition to the web;
- (b) means for supplying the coating composition to the inner cavity at a position between the first side and second side of the hopper;
- (c) first adjustable bypass means for supplying the coating composition from the first end of the inner cavity to the first end of the outer cavity;
- and
- (d) second adjustable bypass means for supplying the coating composition from the second end of the inner cavity to the second end of the outer cavity.
2 more elements
A coating apparatus for supplying a coating composition to a web comprising:
- (a) a coating hopper having an inner cavity and an outer cavity, each cavity having a first end at a first side of the coating hopper and a second end at a second side of the coating hopper, the inner cavity and outer cavity in fluid communication through a communication slot extending from the first side of the hopper to the second side of the hopper, the hopper having a metering slot in fluid communication with the outer cavity for supplying the coating composition to the web;
- (b) means for supplying the coating composition to the inner cavity at the first end;
- and
- (c) adjustable means for supplying the coating composition to the second end of the outer cavity.
1 more element
A coating apparatus for supplying a coating composition to a web comprising:
- (a) a coating hopper having an inner cavity and an outer cavity, each cavity having a first end at a first side of the coating hopper and a second end at a second side of the coating hopper, the inner cavity and outer cavity in fluid communication through a communication slot extending from the first side of the hopper to the second side of the hopper, the hopper having a metering slot in fluid communication with the outer cavity for supplying the coating composition to the web;
- (b) first means for supplying the coating composition to the inner cavity am a position between the first end and the second end;
- (c) second means for supplying the coating composition to the first end of the outer cavity;
- and
- (d) third means for supplying the coating composition to the second end of the outer cavity.
2 more elements
Dependencies are inferred from the claim text.