US PATENT SUBCLASS 425 / 376.1
STOCK PRESSURIZING MEANS OPERABLY ASSOCIATED WITH DOWNSTREAM SHAPING ORIFICE

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

376.1STOCK PRESSURIZING MEANS OPERABLY ASSOCIATED WITH DOWNSTREAM SHAPING ORIFICE {7}
377  DF  .~> Including product handling means
378.1  DF  .~> Including heating or cooling means {2}
380  DF  .~> Including auxiliary shaping means (e.g., mandrel, etc.) associated with molding orifice {1}
381.2  DF  .~> Centripetal elastic melt extruder type
382 R  DF  .~> Plural orifices {2}
382.3  DF  .~> Including additional rotating means downstream of the primary pressurizing means
382.4  DF  .~> Including restriction upstream of shaping orifice and downstream of primary pressurizing means

DEFINITION

Classification: 425/376.1

Stock pressurizing means operably associated with downstream shaping orifice:

(under the class definition) Apparatus including means defining a shaping orifice (e.g.., a nozzle) combined with fluent stock material handling means comprising means ahead of the orifice to increase pressure on the material to force flow through the orifice.

SEE OR SEARCH THIS CLASS, SUBCLASS:

204, for apparatus in which the pressurizing means comprises plural diverse or parallel, intersecting means which may also agitate or knead the stock.

461+, for an extrusion nozzle, per se; see the search notes

thereunder for special combinations including extrusion type forming means.

SEE OR SEARCH CLASS

162, Paper Making and Fiber Liberation,

408, for injection molding apparatus for paper. 222, Dispensing,

92+, and 206+ for collapsible or resilient wall containers to force material through an outlet; subclasses 216+, 226+ and 251+ for means forcing material from a supply to an outlet where no forming is involved.