Plastic and nonmetallic article shaping or treating: processes – Forming articles by uniting randomly associated particles
Patent
1990-06-22
1991-09-10
Theisen, Mary Lynn
Plastic and nonmetallic article shaping or treating: processes
Forming articles by uniting randomly associated particles
100289, 264112, 425318, 425412, 425423, 4254517, B29C 4302
Patent
active
050471902
ABSTRACT:
A differential screw thread press is provided for forming a compacted disc for spectrographic examination purposes by having a pair of opposed threaded bolts in a frame with the bolts having different thread pitches so that they come together as the frame is rotated about the axis of the bolts. The bores for receiving the opposed bolts in the frame are aligned along the same axis and a disc holder is provided for containing the mull to be compacted about the end of one bolt.
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Shlomo Gilad, "A Die For Use In The Production of Pellets, Specially For Infra Red Spectrometry", Israeli Patent No. IL30242 (Mar. 30, 1973), Abstract.
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