Plastic and nonmetallic article shaping or treating: processes – Recycling of reclaimed or purified process material – Of liquid process material
Reexamination Certificate
2006-11-28
2006-11-28
McDowell, Suzanne E. (Department: 1732)
Plastic and nonmetallic article shaping or treating: processes
Recycling of reclaimed or purified process material
Of liquid process material
C264S570000, C264S523000, C264S085000
Reexamination Certificate
active
07141190
ABSTRACT:
A process of molding thermoplastic preforms into bottles and similar containers wherein pressurized liquids, such as water, are used in the stretching and shaping process instead of pneumatic gases, such as heated air. The result is greater control over the crystallization of the thermoplastic material and economies of scale. Addition of peroxides, or similar materials are used for sterilization can be added to the liquid thereby conditioning the container for immediate filling with sterile product and eliminating the need for an additional sterilization step following completion of the molding step. As an added step, dry, sterile air can be used to vent and dry the container just prior to introduction of product. Also use of liquid, rather than heated air, provides a washing or cleansing of actealdehydes or ethanol, which may be present in the extruded preform, from the finished container.
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Holt William H.
McDowell Suzanne E.
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