B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
18/1143
B29C 43/58 (2006.01)
Patent
CA 1229711
ABSTRACT OF THE DISCLOSURE In combination with a pair of pressure members having confronting surfaces movable one toward and away from the other, means for detecting solid impurities between the confronting surfaces of the pressure members, comprising, a gas pressure inlet tube mounted on and spaced outwardly of the outer side of one of the pressure members and terminating in a plane representing the plane of the confronting surface of the one pressure member, a gas pressure outlet tube mounted on and spaced outwardly of the outer side of the other pressure member and terminating in a plane representing the plane of the confronting surface of the other pressure member, the ends of the gas pressure inlet tube and outlet tube being in axial alignment, means connected to the inlet tube for supplying thereto a gas under a predetermined super- atmospheric pressure, and means connected to the outlet tube for detecting the presence of gas delivered thereto from the inlet passageway means, a drop in a gas pressure indicating that the confronting surfaces are spaced apart.
459367
Borden Ladner Gervais Llp
Hull Corporation
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