Mold assembly for use in packaging machine

Details Mold assembly for use in packaging machine Mold assembly for use in packaging machine

1974-10-11

1976-03-09

Shore, R. J.

Plastic article or earthenware shaping or treating: apparatus

Plural reshaping means or plural vulcanizing means including...

Including means for contacting work by fluid pressure

425387R, 425388, 264 89, B29C 302

Patent

active

039429342

ABSTRACT:
A mold assembly for use in a packaging machine for making a blistered package, which forms a plurality of blisters in a web of thermoplastic resin film forming a part of the blistered package. The mold assembly comprises a preforming structural body formed with a plurality of preforming molds and a finishing structural body formed with the corresponding number of finishing molds arranged in the same pattern as the preforming molds. The thermoplastic resin web is first subjected to a preforming process with the preforming structural body and then to a final forming process with the finishing structural body thereby to avoid excessive and quick reduction of the wall thickness which may otherwise be observable in any of the finally formed blisters. A method for this purpose is also disclosed.

REFERENCES:
patent: 3126580 (1964-03-01), Paschke
patent: 3181202 (1965-05-01), Martelli et al.
patent: 3244779 (1966-04-01), Levey et al.
patent: 3805486 (1974-04-01), Mahaffy et al.

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