US PATENT SUBCLASS 53 / 381.5
.~ Means to open envelope


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

381.1  DF  MEANS TO OPEN OR ERECT RECEPTACLE {6}
381.5.~ Means to open envelope {2}
381.6  DF  .~.~> Including means to apply suction to grip envelope
381.7  DF  .~.~> Means to open flap


DEFINITION

Classification: 53/381.5

Means to open envelope:

(under subclass 381.1) Apparatus particularly adapted to provide access into a cover comprised of upper and lower planar sheets which, before access to the package, engaged each other and were united at their perimeters, which cover was intended to hold sheet-like goods.

(1) Note. An "envelope" with a bellows or gusset is not included herein.

SEE OR SEARCH THIS CLASS, SUBCLASS:

569, for apparatus for forming and filling a letter-type envelope.