Automatic spray coating machine

Details Automatic spray coating machine Automatic spray coating machine

B - Operations, Transporting

05

B

117/57, 32/61

B05B 15/04 (2006.01) H01J 9/20 (2006.01) H01J 29/88 (2006.01)

Patent

CA 1111719

ABSTRACT OF THE DISCLOSURE A device for coating, with a carbon material, the inner surface of a cathode ray tube having a neck and flared or cone end portion which is opened at its end remote from the neck along a free peripheral edge portion to which the front panel of the completed cathode ray tube is later secured. The device includes a frame on which a turntable is rotatably mounted and supports, for rotation therewith, a seal assembly for selectively forming a seal on the inner surface of the flared portion of the cathode ray tube adjacent the free edge thereof. The tube is supported on the turntable adjacent the seal assembly along its peripheral edge, and the assembly includes an expandable steel strip generally complementary to the internal configuration of the tube along which the seal is to be formed, so that upon expan- sion of the seal strip a tight seal is formed against the tube. The device includes a coating mechanism, as for example spray nozzles for coating the inner surface of the tube after the seal is formed, whereby the seal prevents the sealed or masked portion of the tube from being coated with the coating material.

295311

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