US PATENT SUBCLASS 402 / 43
.~.~.~.~ Plural pairs of opposed retainers independently operable

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  DF  .~.~ Opposed sheet retainers (e.g., ring binders, etc.) {5}
42  DF  .~.~.~ Rotatable on discrete hinge pin {2}
43.~.~.~.~ Plural pairs of opposed retainers independently operable

DEFINITION

Classification: 402/43

(under subclass 42) Device including at least two sets of contralaterally aligned or offset sheet retainers with one or both retainers of each set being separately manipulated between and overlapped or abutting closed relation to cooperatively secure at least a portion of a sheet and an open position permitting release of that portion.