Package making – Methods – Closing package or filled receptacle
Patent
1997-03-03
1999-11-16
Johnson, Linda
Package making
Methods
Closing package or filled receptacle
53485, 53453, 533293, 533742, 156 69, B65B 5110, B65B 4702
Patent
active
059836075
ABSTRACT:
A package is provided with a lid and container that are heat sealed together. A multi-ply sheet material is provided for being thermoformed to define the container which has a tapering wall and bulge-resistant bottom end. Prior to thermoforming the container from the sheet, the sheet is heated with oval pads on a plurality of plates which are arranged in a configuration to facilitate control of the sheet temperature. A plug is used in the thermoforming process to contact the sheet and position the sheet within a die. A lid sheet is heat sealed to the container sheet over the thermoformed containers so as to produce a pair of spaced-apart, annular bead heat seals. The package is completed by severing the sealed-together sheets at the periphery of the container with a punch and die set that produces and clean, smooth cut surface.
REFERENCES:
patent: 2390550 (1945-12-01), Moore
patent: 3137111 (1964-06-01), Bostrom
patent: 3367808 (1968-02-01), Edwards
patent: 3868917 (1975-03-01), Arfert
patent: 4870800 (1989-10-01), Kasai
patent: 4913307 (1990-04-01), Takata et al.
patent: 5331791 (1994-07-01), Fux et al.
Mihalov Lori J.
Sita Lewis H.
Stevens Todd A.
Ulstad David C.
Zeitler W. George
Abbott Laboratories
Hulseberg Daniel J.
Johnson Linda
Woodworth Brian R.
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