US PATENT SUBCLASS 402 / 31
.~.~ Opposed sheet retainers (e.g., ring binders, etc.)

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

26  DF  SHEET RETAINER TRAVELS ARCUATE PATH {2}
29  DF  .~ Travel in plane perpendicular to axis of rotation {3}
31.~.~ Opposed sheet retainers (e.g., ring binders, etc.) {5}
32  DF  .~.~.~> Spacing of adjacent retainers adjustable
33  DF  .~.~.~> Opening between retainers adjustable in predetermined increments
34  DF  .~.~.~> Stationary retainer with traveling opposed retainer {1}
36  DF  .~.~.~> Hinged on spaced axes {2}
42  DF  .~.~.~> Rotatable on discrete hinge pin {2}

DEFINITION

Classification: 402/31

(under subclass 29) Device wherein the device includes a pair

of sheet retainers contralaterally disposed with their distal ends either in offset or aligned relation, which retainers pass through the thickness dimension of the sheet and cooperate to releasably secure the sheet.

SEE OR SEARCH CLASS

40, Card, Picture, or Sign Exhibiting,

404, and 536 for retaining means engaging aperture in an item.