Claims
- 1. A coating method with apparatus comprising upper and lower members which define top and bottom walls, respectively, of a coating material reservoir and a passage for passing coating material from the reservoir to a surface to be coated, each of said members at the end of said passage including a passage surface closely adjacent the surface to be coated, one of said passage surfaces being closer to the surface to be coated than the other; means for introducing a coating material into the reservoir and through the end of said passage; two sidewalls, the inside surfaces of which contact said passage surfaces to define the end of said passage; each sidewall provided with a smooth bearing surface positioned in a plane parallel to the closer of said passage surfaces to the surface to be coated, said closer passage surface being set back from said bearing surfaces by a preselected distance which determines the desired coating thickness, the bearing surfaces adapted to be placed in contact with portions of the surface to be coated which are not to be coated comprising the steps of:
- a. advancing a surface to be coated in a direction from the passage surface further from the surface to be coated toward the passage surface closest to the surface to be coated without contacting the surface to be coated with either of said first and second passage surfaces, while continuously contacting said smooth bearing surfaces to portions of the surface to be coated which are not to be coated;
- b. building a bead of coating material in the space defined by the surface to be coated, the inside of said member ending in the passage surface closer to the surface to be coated and said passage surface further from the surface to be coated; and
- c. coating the coating material onto the surface to be coated between the closer of said passage surfaces from the bead of coating material built in the space defined by the surface to be coated, the inside of said member ending in the passage surface closer to the surface to be coated and said passage surface further from the surface to be coated, the passage surface closest to the surface to be coated functioning as a metering face for metering coating material onto the surface to be coated.
- 2. A method according to claim 1 wherein said passage surfaces are planar and positioned in essentially parallel planes which are essentially perpendicular to the flow of coating material through said passage, wherein said upper and lower members are moveable with respect to each other, and further including two sets of screws, one set of screws for adjusting the distance between the upper and lower members at the end of the passage to control the flow area of the end of the passage, both sets of screws for adjustably securing the relative longitudinal positions of said upper and lower members.
CROSS-REFERENCE TO RELATED APPLICATIONS
This application is a continuation of copending application Ser. No. 209,611, filed Dec. 20, 1971 now abandoned
US Referenced Citations (21)
Continuations (1)
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Number |
Date |
Country |
Parent |
209611 |
Dec 1971 |
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