Plastic article or earthenware shaping or treating: apparatus – Preform severing means – Cutter guided by or cooperating with peripheral edge of...
Patent
1989-12-18
1991-07-16
Housel, James C.
Plastic article or earthenware shaping or treating: apparatus
Preform severing means
Cutter guided by or cooperating with peripheral edge of...
264155, 264156, 264163, 4253021, 425398, B29C 5126
Patent
active
050321064
ABSTRACT:
A pair of male and female mold parts for forming orifices during the thermal formation of a structure. The combination includes: a pair of mold members having a first mold member and a second mold member; at least one male key member carried by the first mold member having on at least one side thereof a planar face terminating in either a cutting edge or a bevelled face; at least one female key member carried by the second mold member having a pair of spaced planar faces each terminating in either a cutting edge or a bevelled face; wherein at least one of the key members is free to move independently of its mold member, the key members being dimensioned, constructed and registered so that a cutting edge of one key member will be opposite to a bevelled face of the other key member so that, on closure of the mold members with a softened sheet of plastic therebetween, the cutting edge of one key member will contact the sheet, ride off the bevelled face, the planar faces will come into alignment and, with a sliding relationship between the planar faces, the male key will cooperate with the female key to form the orifice.
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Housel James C.
McKillop A. J.
Mlotkowski M. J.
Mobil Oil Corporation
Speciale C. J.
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