B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
18/1064
B29C 29/00 (1980.01)
Patent
CA 1150468
TRIM PRESS ABSTRACT OF THE INVENTION A trim press for severing cup-shaped articles from a sheet of thermoplastic material in which the arti- cles have been integrally formed as by a vacuum forming operation. A horizontally reciprocable punch is driven to sever articles positioned in a stationary die by a linkage arranged to drive the punch at a relatively slow speed during the severing operation to achieve a smooth shearing separation of the relatively soft thermoplastic material. The sheet is fed into the die in step-by-step movement through vertical sheet guides fixedly mounted in a treadle which is reciprocated with the punch at a proportionate speed. A flexible sheet guide connected between the guides in the treadle and a fixed point on the machine frame flexes to accommodate reciprocation of the treadle while contin- uously guiding the sheet to the guides on the treadle. Feed fingers mounted on the treadle advance the sheet to the die in step-by-step movement synchronized with the stroke of the punch.
406841
Arends Albert W.
Pickard George L.
Leesona Corporation
Ridout & Maybee Llp
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