US PATENT SUBCLASS 425 / 522
FEMALE MOLD AND MEANS TO SHAPE PARISON DIRECTLY BY INTERNAL FLUID PRESSURE, (E.G., BLOW MOLD, ETC.)

Current as of: June, 1999
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425 /   HD   PLASTIC ARTICLE OR EARTHENWARE SHAPING OR TREATING: APPARATUS

522FEMALE MOLD AND MEANS TO SHAPE PARISON DIRECTLY BY INTERNAL FLUID PRESSURE, (E.G., BLOW MOLD, ETC.) {10}
523  DF  .~> Utilizing laminated parison
524  DF  .~> With filling means
525  DF  .~> Forming baffle, bottleneck, or handle
526  DF  .~> With heating or cooling means
527  DF  .~> With means to sever product
528  DF  .~> Including means to prepare parison {5}
535  DF  .~> Including blowing medium supply means {1}
537  DF  .~> Including product ejector
538  DF  .~> Plural female molds and means to shape parison at each directly by internal fluid pressure {2}
541  DF  .~> Including means to close or lock blow mold

DEFINITION

Classification: 425/522

(under the class definition) Apparatus particularly adapted to shape a preformed hollow workpiece including (1) a closed shaping surface facing radially inwardly adapted to be engaged by and to shape preformed material moving radially outwardly thereagainst, and (2) means to provide a fluent medium under pressure to the interior of the preformed workpiece, whereby the interior pressure exceeds the ambient pressure and causes the preformed workpiece to stretch and move radially outwardly into shaping engagement with the closed shaping surface.

(1) Note. The closed shaping surface facing radially inwardly (female mold) of this subclass is stationary with respect to the molded product at the instant that molding is completed.

(2) Note. Included in this subclass is, for example, means to form a container such as a bottle.

SEE OR SEARCH CLASS

65, Glass Manufacturing,

110, for shaping a hollow, green glass preform by utilization of gas pressure. 156, Adhesive Bonding and Miscellaneous Chemical Manufacture,

287, for process of laminating in which fluid pressure differential is applied in the lining of a hollow body; subclass 444, for means to bend a work part by pneumatic blast combined with means to laminate; and, subclass 475, for means to bend a work part to the configuration of another part to which it is secured.

264, Plastic and Nonmetallic Article Shaping or Treating: Processes,

512+, and 523+ for the process of blow molding.