Plastic and nonmetallic article shaping or treating: processes – With severing – removing material from preform mechanically,... – Simultaneous severing and shaping – or severing while work...
Patent
1995-05-30
1996-09-03
Woo, Jay H.
Plastic and nonmetallic article shaping or treating: processes
With severing, removing material from preform mechanically,...
Simultaneous severing and shaping, or severing while work...
206387100, 264145, 264160, 264175, 264280, 425291, 425294, 425296, 425301, 425308, 425363, 493 60, 493230, 493365, 493370, B29C 4324, B29C 4346, B65D 85575
Patent
active
055521010
ABSTRACT:
A method for making plastic case blanks is disclosed. A molten plastic material is passed through a nip of a first, preforming pair of molding cylinders to form a semi-solidified sheet having a first thickness, The semi-solidified sheet is then molded to form a final sheet having a second, uniform thickness less than the first thickness and the final sheet is scored to form folding scores and cut to form a plurality of the blanks. The molding, scoring and cutting are simultaneously performed by passing the semi-solidified sheet through a nip of a second pair of cylinders. One of the second pair of cylinders has scoring means for forming the folding scores in the final sheet and cutting means for cutting the final sheet to form the plurality of the blanks and the other of the second pair of cylinders has recess means complementary to the cutting means for receiving the cutting means and effectuating the cutting.
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Fujii Tatsuo
Tanaka Kimio
Leyson Joseph
TDK Corporation
Woo Jay H.
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