Snap-action one-piece clamping device

Binder device releasably engaging aperture or notch of sheet – Resilient sheet retainer requiring deflection for sheet removal

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24 67R, 24255SL, 24257, B42F 300

Patent

active

043975771

ABSTRACT:
A snap-action one-piece clamping device, made of spring steel, plastic, or the like, includes an endless member and a tongue. The endless member is a frusto-conical or frusto-spherical band having inner and outer rims of generally oval or rectangular configuration. The tongue projects transversely from either the inner or outer rim, depending upon the embodiment. The endless member has two stable positions on opposite sides of a reference plane defined by its outer rim and can be snapped to either position from the other by finger pressure applied toward the reference plane proximate the longitudinal mid-point in the endless member. The tongue is positionally slaved to the endless member and likewise has two stable positions. In one embodiment the tongue projects from the inner rim and clamps sheet material or a tube against the inner rim. In another embodiment the tongue projects from the outer rim and extends along a pen or the like to clamp a pocket against the pen.

REFERENCES:
patent: 756535 (1904-04-01), Senderling
patent: 1355287 (1920-10-01), Treiber
patent: 1467781 (1923-09-01), Dawson
patent: 1988345 (1935-01-01), Vaughn
patent: 2368544 (1945-01-01), Hogan
patent: 4174910 (1979-11-01), McSherry et al.

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