US PATENT SUBCLASS 270 / 52.23
.~.~.~ Signature opener

Current as of: June, 1999
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270 /   HD   SHEET-MATERIAL ASSOCIATING

52.01  DF  ASSOCIATING OR DISASSOCIATING {11}
52.14  DF  .~ Signature associating {7}
52.19  DF  .~.~ Insetting {3}
52.23.~.~.~ Signature opener {2}
52.24  DF  .~.~.~.~> By suction
52.25  DF  .~.~.~.~> By gripping

DEFINITION

Classification: 270/52.23

Signature opener:

(under subclass 52.19) Subject matter including means for engaging or pulling apart the folded sides of the signature.