US PATENT SUBCLASS 264 / 500
DIRECT APPLICATION OF FLUID PRESSURE DIFFERENTIAL TO PERMANENTLY SHAPE, DISTORT, OR SUSTAIN WORK

Current as of: June, 1999
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264 /   HD   PLASTIC AND NONMETALLIC ARTICLE SHAPING OR TREATING: PROCESSES

500DIRECT APPLICATION OF FLUID PRESSURE DIFFERENTIAL TO PERMANENTLY SHAPE, DISTORT, OR SUSTAIN WORK {14}
501  DF  .~> Producing toroidal work (e.g., tire, etc.) {1}
503  DF  .~> Shaping against interior of a forming surface by rotation of material or material shaping member
504  DF  .~> Perforation by differential fluid pressure; or smoothing, scoring, or cutting of green concrete with fluid pressure
505  DF  .~> Corrugating {1}
509  DF  .~> Labeling or embossing indicia
510  DF  .~> Producing multilayer work or article {2}
517  DF  .~> Bulk deposition of particles by differential fluid pressure {1}
519  DF  .~> Differential temperature conditioning {2}
523  DF  .~> Including application of internal fluid pressure to hollow finite length parison to expand same into conformity with female mold part {10}
544  DF  .~> Starting material is nonhollow planar finite length preform or product is finite length {6}
555  DF  .~> Production of continuous or running length {3}
570  DF  .~> Including hydrostatic or liquid pressure
571  DF  .~> Including use of vacuum
572  DF  .~> With internal application of fluid pressure {2}

DEFINITION

Classification: 264/500

DIRECT APPLICATION OF FLUID PRESSURE DIFFERENTIAL TO PERMANENTLY SHAPE, DISTORT, OR SUSTAIN WORK:

(under the class definition) Processes wherein a positive or negative pressure is applied through the medium of a liquid or gas in direct contact with a workpiece to form or maintain a desired configuration.

(1) Note. The utilization of steam pressure as a source of heat is not included here unless the steam serves to shape, support, or sustain the work. Steam to heat is classified below based on the specific molding or treatment step.

(2) Note. Introduction of fluent material into a mold under pressure is not here unless a gas pressure medium acts directly on the material in the mold cavity. Thus, injection molding utilizing pneumatic pressure to inject the molding material is not here if the pneumatic pressure acts through a column of molding material such as a gate portion of the article. Injection of the molding material rather than directly on the body molding is provided for in subclasses 328+ below.

SEE OR SEARCH CLASS

65, Glass Manufacturing,

261+, for glass shaping apparatus comprising inflating a parison in a mold; see the search notes thereunder.

425, Plastic Article or Earthenware Shaping or Treating: Apparatus,

387+, for preform reshaping by direct application of gas pressure (e.g., inflating, etc.); see the search notes thereunder.