US PATENT SUBCLASS 229 / 313
.~.~ Line of weakness

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


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.~.~ Line of weakness {2}
314  DF  .~.~.~> Lines of weakness in opposed walls form removable envelope portion {1}
316  DF  .~.~.~> Line of weakness extends along or adjacent envelope side edge

DEFINITION

Classification: 229/313

Line of weakness:

(under subclass 307) Subject matter wherein the opening means includes a line of reduced strength.

SEE OR SEARCH CLASS

383, Flexible Bags,

207+, for a flexible bag having a line of weakness for tearing.

428, Stock Material or Miscellaneous Articles,

43, for a sheet, web or layer which has been weakened to facilitate tearing and subclasses 131+, particularly subclass 136, for sheet material having slits or apertures.