US PATENT SUBCLASS 229 / 314
.~.~.~ Lines of weakness in opposed walls form removable envelope portion

Current as of: June, 1999
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229 /   HD   ENVELOPES, WRAPPERS, AND PAPERBOARD BOXES

68.1  DF  ENVELOPE {10}
307  DF  .~ Having means to facilitate opening the envelope by severing it (e.g., tearing, cutting, piercing, etc.) {3}
313  DF  .~.~ Line of weakness {2}
314.~.~.~ Lines of weakness in opposed walls form removable envelope portion {1}
315  DF  .~.~.~.~> Including means to prevent contents from extending into the removable portion

DEFINITION

Classification: 229/314

Lines of weakness in opposed walls form removable envelope portion:

(under subclass 313) Subject matter wherein two walls which are on opposite sides of the envelope include lines of reduced strength which cooperate to provide an envelope section which can be completely separated from the remainder of the envelope by tearing.

SEE OR SEARCH THIS CLASS, SUBCLASS:

301+, for similar tear line structure which forms a remailable envelope when torn.