Polymeric package with removable non-peelable flange opening ele

Receptacles – Closures – With closure opening arrangements for means

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Details

2203591, 2203594, 428 357, 428 367, B65D 1740

Patent

active

061353043

ABSTRACT:
Improved polymeric packages with removable non-peelable flange portions of the present invention comprise clamshell packages having a removable and non-peelable package sealing mechanism, which mechanism comprises lines of reduced strength disposed within respective more rigid outside polymeric lid and container layers, which lines of reduced strength do not penetrate the inner disposed less rigid polymeric lid and container layers, whereby the respective lid and container flange portions disposed laterally exterior of the lines of reduced strength can be removed to the package--easily neatly efficiently and without generation of particulate matter.

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patent: 4759463 (1988-07-01), Mazoin
patent: 4858780 (1989-08-01), Odaka et al.
patent: 5178293 (1993-01-01), Suzuki et al.
patent: 5180599 (1993-01-01), Feldmeier
patent: 5314733 (1994-05-01), Saito et al.
patent: 5429833 (1995-07-01), Wyslotsky
patent: 5632133 (1997-05-01), Wyslotsky

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