Plastic article or earthenware shaping or treating: apparatus – With indicator – signal – recorder – illuminator – or inspection...
Patent
1995-08-15
1997-07-29
Woo, Jay H.
Plastic article or earthenware shaping or treating: apparatus
With indicator, signal, recorder, illuminator, or inspection...
425815, 264 401, 73866, B29C 4792
Patent
active
056519990
ABSTRACT:
An apparatus is disclosed for testing the integrity of tubing formed by extruding material through an extrusion die. The apparatus includes a source of helium gas which is fluidly connected to the extrusion die so that helium gas is continuously introduced into the interior of the tube as it is formed during the extruding process. The extruded tubing is passed through an elongated inspection housing open at each end. The inspection housing has a cross-sectional inside shape greater than the cross-sectional shape of the tubing thus forming an annular chamber between the tubing and the interior of the inspection housing. A helium detector constantly monitors the atmosphere within the annular chamber and, whenever helium is detected, indicative that the tubing has a leak or the fault, activates an alarm.
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"Introduction to Fuel System Leak Detection Products, " EG&G Automotive Research advertisement.
"FSLDP-1 Fuel System Leak Detector," EG&G Automotive Research Order Form.
Pilot Industries, Inc.
Schwartz Iurie A.
Woo Jay H.
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