Binder for sheet material

Details Binder for sheet material Binder for sheet material

1985-11-08

1987-10-06

Goldberg, Howard N.

Binder device releasably engaging aperture or notch of sheet

Depository

Face member with back member

402 80R, 411466, 411472, 411496, B42F 1300

Patent

active

046979450

ABSTRACT:
An improved binder for sheet material. The binder includes a cover or backing member formed of paperboard or plastic, and a pair of hinge assemblies are attached to the inner surface of the cover. A standard binding mechanism is interconnected between the hinge assemblies and serves to retain the sheet material. Each hinge assembly includes a metal hinge plate that is secured flatwise to the cover by a plurality of stamped out prongs. Each prong is generally triangular in configuration and is provided with a curved pointed tip. The prongs have a length substantially greater than the thickness of the backing member and when embedded by pressure, the configuration of the prongs causes the prongs to curl within the cover, so that the prongs are completely embedded in the cover and not exposed on the outer surface of the cover.

REFERENCES:
patent: 989968 (1911-04-01), Heil
patent: 1114237 (1914-10-01), Diamond
patent: 1699907 (1925-05-01), Newman
patent: 1791693 (1931-02-01), Trussell
patent: 2282624 (1942-05-01), Upson et al.
patent: 2380655 (1945-07-01), Lang
patent: 3667337 (1972-06-01), Burke

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