Variable-pitch moulding units and moulding machine

Details Variable-pitch moulding units and moulding machine Variable-pitch moulding units and moulding machine

2011-03-29

2011-03-29

Davis, Robert B (Department: 1743)

Plastic article or earthenware shaping or treating: apparatus

Female mold and means to shape parison directly by internal...

Plural female molds and means to shape parison at each...

C425S451400, C425S541000

Reexamination Certificate

active

07914276

ABSTRACT:
An assembly including units for molding polymer materials, the units being arranged successively in a mobile line, each of the molding units including a mold, the mold including two parts mutually mobile about a pivot pin, the movement of the two parts relative to each other being produced upon opening and closing of the mold. The assembly includes rollers co-operating with a track, each of the rollers being connected by link rods to the two pivot pins of adjacent molding units, the path described by the rollers against the track and the path described by the pivot pins being urged to be brought closer together on a predetermined travel of the molding units, such that the distance between the pivot pins of the adjacent molding units is increased during the travel.

REFERENCES:
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patent: 4313720 (1982-02-01), Spurr
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patent: 5618489 (1997-04-01), Weissmann
patent: 6805548 (2004-10-01), Evrard
patent: 7137804 (2006-11-01), Mue et al.
patent: 7708549 (2010-05-01), Stoiber et al.
patent: 7766645 (2010-08-01), Legallais
patent: 2004/0151797 (2004-08-01), Mue et al.
patent: 2 793 722 (2000-11-01), None
patent: 2 825 659 (2002-12-01), None

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