Plastic article or earthenware shaping or treating: apparatus – Preform reshaping or resizing means: or vulcanizing means... – Coacting shaping surfaces
Patent
1982-03-11
1983-12-06
Anderson, Philip E.
Plastic article or earthenware shaping or treating: apparatus
Preform reshaping or resizing means: or vulcanizing means...
Coacting shaping surfaces
229 25EC, 229 44EC, 264321, 425401, 425812, 425817R, B29C 1703, B29D 2700
Patent
active
044190689
ABSTRACT:
An egg carton made from expanded polystyrene with a nonexpanded skin on one side includes integrally formed cover and tray portions interconnected together by a pair of hinges adjacent opposite sides of a hingeband. The tray is divided into a plurality of cells by a plurality of partitions. At least some of the partitions have a top flap portion hinged to the top of the partition by the skin of the polystyrene. Each cell further has a pliant inside surface provided by one or more grooves in the interior cell walls. A post extending from the inside surface of the cover is formed opposite a tray support surface using a thermo molding method by which a protrusion in a top mold is inserted into a nonvented cavity of a bottom mold. A pair of integrally molded hinge posts extend above the hingeband a distance less than the width of the hingeband between hinges and seat into a groove in the hingeband when the top is in closure relationship to the tray.
REFERENCES:
patent: 3185370 (1965-05-01), Reifers et al.
patent: 3470281 (1969-09-01), Knowles
patent: 3532786 (1970-10-01), Coffman
patent: 3640668 (1972-02-01), Brown et al.
patent: 3703255 (1972-11-01), Wade
patent: 3846526 (1974-11-01), Wade
patent: 3917152 (1975-11-01), Burkett
patent: 3917770 (1975-11-01), Jackson
patent: 4143111 (1979-03-01), Irwin
Anderson Philip E.
Dolco Packaging Corporation
LandOfFree
Molding apparatus having a vented female mold member for forming does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Molding apparatus having a vented female mold member for forming, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Molding apparatus having a vented female mold member for forming will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2027640