Method and apparatus for coating internal cavities of objects with fluid
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United States of America Patent
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Aug 25, 1992
Issued Date -
N/A
app pub date -
Jan 13, 1989
filing date -
Jan 14, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention discloses an apparatus and process for coating hollow objects at precise bands within the internal cavity of the object. The process utilizes centrifugal force to apply the fluid to the object. A probe is moved from underneath the object thereby utilizing gravitational forces to prevent spillage of the material from the probe. A computer controls the pumping rate, the vertical movement of the probe and the rotational speed of the probe to allow the machine to precisely coat a band on the internal cavity of an article. The computer controlled operation eliminates the necessity to waste material. One application of the invention is in the coating of the threads of nuts with Teflon.
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