US PATENT SUBCLASS 53 / 477
.~.~ By heat sealing

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

396  DF  METHODS {22}
476  DF  .~ Closing package or filled receptacle {3}
477.~.~ By heat sealing {2}
478  DF  .~.~.~> Separate closure
479  DF  .~.~.~> Of preformed nonfreestanding container deformed by contents (e.g., bag, tube)

DEFINITION

Classification: 53/477

By heating sealing:

(under subclass 476) Methods including the step of modifying the temperature of the cover material or closure element to facilitate completing the encasement of the contents.

SEE OR SEARCH THIS CLASS, SUBCLASS:

370.7+, 373.7+, 376.6+, 379, and 387.4, for apparatus for closing packages involving temperature modification of the package cover or closure.

463, for methods of heat sealing wrappers.

SEE OR SEARCH CLASS

156, Adhesive Bonding and Miscellaneous Chemical Manufacture, appropriate subclasses for methods of heat sealing.

219, Electric Heating, appropriate subclasses for methods of electric heating.