US PATENT SUBCLASS 53 / 559
.~ Forming a pocket, depression, or hollow compartment by application of heat or pressure (e.g., stretch forming)

Current as of: June, 1999
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53 /   HD   PACKAGE MAKING

558  DF  APPARATUS FOR FORMING OR PARTIALLY FORMING RECEPTACLE AND SUBSEQUENTLY FILLING {5}
559.~ Forming a pocket, depression, or hollow compartment by application of heat or pressure (e.g., stretch forming) {2}
560  DF  .~.~> Capsule
561  DF  .~.~> Molding or extruding a container

DEFINITION

Classification: 53/559

Forming a pocket, depression or hollow compartment by application of heat or pressure (e.g., stretch forming):

(under subclass 558) Apparatus for shaping contents-receiving cavity or indentation in cover material by stressing and distorting a portion of the material against or around a forming member to distend or constrict the material.

(1) Note. The medium used to induce the shaping of the cavities may be positive pressure, vacuum, mechanical pressure, or temperature modification; however, there must be included a former element (e.g., a die) which controls the shape of the cavity or indentation.

SEE OR SEARCH THIS CLASS, SUBCLASS:

140, for apparatus for generating cover material in sheetlike form.

141, for apparatus for preconditioning cover material prior to fabrication into a receptacle.

453, for corresponding methods.

511, for receptacle forming combined with treating the contents with gas or vacuum. 556, for apparatus which stretch a cover material prior to association of the contents.

SEE OR SEARCH CLASS

156, Adhesive Bonding and Miscellaneous Chemical Manufacture,

500, for apparatus for casting, plastic molding, or extruding articles.

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

522, for apparatus for forming containers by direct application of fluid pressure.