Apparatus for multiple stripe coating

• US 4,106,437 A
• Filed: 08/22/1977
• Issued: 08/15/1978
• Est. Priority Date: 08/22/1977
• Status: Expired due to Term

• Current Assignee: Eastman Kodak Company
• Original Assignee: Eastman Kodak Company
• Inventors: Bartlett, Lawrence C.
• Primary Examiner(s): McIntosh, John P.
• Application Number:
  US05/826,616
• Time in Patent Office: 358 Days
• Field of Search: 118/411, 118/412, 118/410, 118/415, 427/286
• US Class Current: 118/412
• CPC Class Codes: B05C 5/0254 Coating heads with slot-shaped outlet B05C5/0283 takes precedence
• CPC Class Codes: B05C 5/027 Coating heads with several outlets, e.g. aligned transversally to the moving direction of a web to be coated B05C5/0254 takes precedence

Abstract

An apparatus for multiple stripe coating of a web with liquid coating composition is comprised of a hopper having a pair of spaced lips and a pair of shims mounted in face-to-face arrangement within the hopper and positioned between the spaced lips. One of the shims is provided with a plurality of open-ended channels while the second shim is equipped with a plurality of projecting portions, corresponding in width and location to the desired stripes, which are in alignment with the open-ended channels and project beyond the open ends thereof. The apparatus is capable of carrying out multiple stripe coating of a web at high speeds and with a high degree of precision in regard to stripe width and registration.

Claims

1. Apparatus for multiple stripe coating of a web with liquid coating composition, said apparatus comprising:

(1) a hopper communicating with a supply of said liquid coating composition, said hopper including a pair of spaced lips;

(2) a first shim mounted within said hopper and positioned between said spaced lips, said first shim having a plurality of open-ended channels therein;

(3) a second shim mounted within said hopper and positioned between said spaced lips in face-to-face arrangement with said first shim, said second shim having a plurality of projecting portions corresponding in width and location to the desired stripes, said projecting portions aligning with said open-ended channels and extending beyond the open ends thereof; and

(4) means for advancing the web to be coated across and closely adjacent to said projecting portions to receive coating composition flowing from said open-ended channels onto said projecting portions and form a plurality of stripes on said web corresponding in width and location with said projecting portions.

2. Coating apparatus as defined in claim 1 wherein said hopper is comprised of a trough having front, back and side walls and a cover plate, said trough and cover plate being adapted to sealingly engage with said shims.

3. Coating apparatus as defined in claim 1 wherein said second shim contains an elongated slot extending over substantially its entire width for directing coating composition into the open-ended channels of said first slim.

4. Coating apparatus as defined in claim 1 wherein said first shim has a thickness in the range from about 0.002 to about 0.02 inches.

5. Coating apparatus as defined in claim 1 wherein said second shim has projecting portions which project beyond the open ends of said channels by a distance in the range from about 0.002 to about 0.03 inches.

6. Coating apparatus as defined in claim 1 wherein the width of each said projecting portion is about 0.01 inches greater than the width of the associated open-ended channel.

7. Coating apparatus as defined in claim 1 including a rotatable drum for supporting said web at the point where said coating composition is applied thereto.

8. Apparatus for use in the multiple stripe coating of a web with liquid coating composition, said apparatus comprising:

(1) a hopper having a pair of spaced lips;

(2) a first shim mounted within said hopper and positioned between said spaced lips, said first shim having a plurality of open-ended channels therein; and

(3) a second shim mounted within said hopper and positioned between said spaced lips in face-to-face arrangement with said first shim, said second shim having a plurality of projecting portions corresponding in width and location to the desired stripes, said projecting portions aligning with said open-ended channels and extending beyond the open ends thereof.