Plastic article or earthenware shaping or treating: apparatus – Female mold and charger to supply fluent stock under... – With means between charger and mold to cut off flow of...
Reexamination Certificate
2007-08-18
2010-12-21
Heitbrink, Tim (Department: 1791)
Plastic article or earthenware shaping or treating: apparatus
Female mold and charger to supply fluent stock under...
With means between charger and mold to cut off flow of...
C425S572000
Reexamination Certificate
active
07854605
ABSTRACT:
The present invention relates to injection molding apparatus (10) comprising a main manifold plate (16) fitted with at least several flow ducts (18), further at least two auxiliary manifold plates (22) fitted with several flow ducts (24), said auxiliary manifold plates being configured above and underneath the main manifold plate (16), the flow ducts (24) of the particular auxiliary manifold plates (22) fluidly communicating with those of the main manifold plate (16), further with needle valve nozzles (26) configured in mutually opposite and back-to-back manner and fluidly communicating with the flow ducts (24) of the auxiliary manifold plates (22), where the needle valve nozzles (26) each comprise one valve needle (28) to open/close a nozzle outlet aperture, and further pneumatically or hydraulically actuated plunger units (units (30; 71) driving the valve needles (28), said plunger units being received in at least one separate receiving plate (32; 70) configured between the auxiliary manifold plates (22), and further means cooling and/or thermally insulating the minimum of one receiving plate (32; 70).
REFERENCES:
patent: 7025586 (2006-04-01), Fischer et al.
patent: 7121820 (2006-10-01), Tooman et al.
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patent: 2 294 041 (1976-07-01), None
patent: 1017239 (2002-07-01), None
Clark & Brody
Gunther Heisskanaltechnik GmbH
Heitbrink Tim
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