US PATENT SUBCLASS 229 / 316
.~.~.~ Line of weakness extends along or adjacent envelope side edge

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}
316.~.~.~ Line of weakness extends along or adjacent envelope side edge

DEFINITION

Classification: 229/316

Line of weakness extends along or adjacent envelope side edge:

(under subclass 313) Subject matter wherein the line of reduced strength is located at or near, and is generally parallel with, a lateral margin of the envelope.

SEE OR SEARCH THIS CLASS, SUBCLASS:

312, for a cord, string, wire, or thread similarly located.