US PATENT SUBCLASS 402 / 51
.~.~.~ Screw threaded means

Current as of: June, 1999
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402 /   HD   BINDER DEVICE RELEASABLY ENGAGING APERTURE OR NOTCH OF SHEET

46  DF  OPPOSED SHEET RETAINERS INVOLVING RELATIVE RECTILINEAR TRAVEL {4}
48  DF  .~ Telescopic retainers with means to telescopically drive and/or secure {4}
50  DF  .~.~ Remote from retainer {1}
51.~.~.~ Screw threaded means

DEFINITION

Classification: 402/51

(under subclass 50) Device wherein the remote means to drive or secure is in the form of (1) a mechanism including a helically grooved elongated element.

SEE OR SEARCH THIS CLASS, SUBCLASS:

49, for a device wherein the means to telescopically drive or secure the first sheet retainer relative to the second sheet retainer includes a pivotal linkage system in combination with and directly acted upon by a screw threaded means.

53, for a similar device wherein the means to telescopically drive or secure also functions as a sheet retainer.