US 8,617,658 B2 · Method and apparatus for conducting film coating on surface of spinning circular workpiece under action of gas pressure, and nozzle utilized in the same

Abstract

This invention relates to a method for conducting film coating on the surface of spinning circular workpiece under action of gas pressure, and nozzle utilized in the same. Circular workpiece to be coated is held on a rotating mechanism, and a feedstock loading machine having a nozzle, which is capable of guiding redundant feedstock and overflowing in a specific direction, is set to have a 100 μm gap with the circular workpiece. When the rotating mechanism is rotated, the polymer solution is precoated on the surface of the circular workpiece, and when gas valve is opened, the polymer solution is squeezed to a predetermined thickness by an annular high pressure gas-stream formed on the periphery of a cylinder, produced from the high pressure gas released.

Claims6

Dependent claims

A method for applying a film coating on a surface of a rotating cylindrical workpiece under action of gas pressure, wherein coating material is fed onto an inner or outer longitudinal part of said cylindrical workpiece with a circular cross section undergoing rotation including the steps of:

establishing an annular gas ring having a feedstock mechanism attached to said annular gas ring and surrounding a cross-section of the longitudinal part of said cylindrical workpiece;
and
displacing said annular gas ring with respect to said cylindrical workpiece for simultaneously coating said workpiece with said coating material and applying gas under pressure to said cylindrical surface whereby the coating material on said cylindrical workpiece is squeezed by the gas-stream so as to be distributed in an even and flat manner.

Dependencies are inferred from the claim text.

Facts

Application

12/732,661Filed 26 Mar 2010

Published

US 2011/0236584 A129 Sep 2011

Granted

31 Dec 2013

Term ends

Not estimatedThe source records don’t support an estimate.

Classification9 codes

B05C 9/12
For applying liquid or other fluent material and performing an auxiliary operation: the auxiliary operation being performed after the application
B05C 5/0241
The liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in…:…
B05C 11/021
Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of…:…
B05C 11/08
Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of…:…

Method and apparatus for conducting film coating on surface of spinning circular workpiece under action of gas pressure, and nozzle utilized in the same

Life of this patent

Method and apparatus for conducting film coating on surface of spinning circular workpiece under action of gas pressure, and nozzle utilized in the same

Life of this patent

Abstract

Claims6