Method and mold for making an improved egg carton

Details Method and mold for making an improved egg carton Method and mold for making an improved egg carton

B - Operations, Transporting

29

D

18/1073, 18/652

B29D 27/00 (1980.01)

Patent

CA 1174411

F-1021 ABSTRACT METHOD AND MOLD FOR MAKING AN IMPROVED EGG CARTON 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 thermoforming by relative movement between a male key mounted in the male mold member and a 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.

444364

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