Plastic and nonmetallic article shaping or treating: processes – With measuring – testing – or inspecting – Controlling fluid pressure in direct contact with molding...
Reexamination Certificate
2008-09-09
2011-11-08
Huson, Monica A (Department: 1742)
Plastic and nonmetallic article shaping or treating: processes
With measuring, testing, or inspecting
Controlling fluid pressure in direct contact with molding...
C264S040600, C264S519000, C264S532000
Reexamination Certificate
active
08052904
ABSTRACT:
Process for forming containers from a blank, preferably a preform, made of a thermoplastic, the containers being formed using a stretch-blow moulding machine of rotary type having a blow-moulding mould mounted on the periphery of a carousel rotated continuously about its axis, the blow-moulding mould operating in cyclic manner according to a blow-moulding cycle having the following steps: placing a preheated blank in a blow-moulding mould; closing the blow-moulding mould; blowing the blank in the blow-moulding mould; flushing the inside of the container with a cooling gas, by injecting air thereinto; grasping the blow-moulded container by external gripping means; and opening the blow-moulding mould, which process includes automatically varying the duration of the flushing step at each start of production of the containers, in a temporary and evolving manner for a few minutes to establish in the containers thermal conditions enabling the first containers to be formed at a temperature that gives them a final volume corresponding to the final volume of the containers formed during the stead-state operation of the stretch-blow moulding machine.
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Derrien Mikael
Protais Pierrick
Huson Monica A
Sidel Participations
Sughrue & Mion, PLLC
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