Electric heating – Heating devices – Combined with container – enclosure – or support for material...
Patent
1997-03-03
2000-07-18
Walberg, Teresa
Electric heating
Heating devices
Combined with container, enclosure, or support for material...
53477, F27B 906, B65B 5110
Patent
active
060910542
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.
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Mihalov Lori J.
Sita Lewis H.
Stevens Todd A.
Ulstad David C.
Zeitler W. George
Abbott Laboratories
Hulseberg Daniel J.
Robinson Daniel
Walberg Teresa
Woodworth Brian R.
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