Plastic and nonmetallic article shaping or treating: processes – With severing – removing material from preform mechanically,... – Making hole or aperture in article
Patent
1982-09-23
1984-05-01
Anderson, Philip E.
Plastic and nonmetallic article shaping or treating: processes
With severing, removing material from preform mechanically,...
Making hole or aperture in article
264156, 264321, 264DIG66, 425290, 425292, 425301, 425395, 425817R, 425DIG37, 425DIG41, B29D 2700, B29C 1703, B29C 1708
Patent
active
044460880
ABSTRACT:
An inwardly offset surface of the cover of a carton is cut in a plane transverse to the top of the cover. A protrusion on the bottom surface of a complementary recess in the latch flap extends through the hole to latch the carton with the protrusion being within the cover recess to prevent accidental opening of the carton. The mold for producing the carton cuts the hole while thermoforming by relative movement between a male key mounted in the male mold member and female key mounted in the female mold member. Both keys have flat surfaces transverse to the closing motion of the molds. These flat surfaces are biased into engagement one with the other so that the plastic is cut in a shearing action.
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Anderson Philip E.
Gilman M. G.
McKillop A. J.
Mobil Oil Corporation
Powers, Jr. J. F.
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