Round back binder

Details Round back binder Round back binder

1992-03-18

1993-06-29

Bell, Paul A.

Binder device releasably engaging aperture or notch of sheet

Depository

Face member with back member

281 29, 402502, 402 73, B42F 1300

Patent

active

052228258

ABSTRACT:
A binder having a rectangular stiffener board and a sheet retaining assembly. The stiffener board is provided in its first surface with at least three spaced parallel channels medially located between the side edges of the board. Each channel defines a hinge line extending along the height of the stiffener board. The sheet retaining assembly is mounted on the first surface of the board adjacent to the channels but outside the medial section of the board where the channels are located. The binder thus structured allows the stiffener board to define front and rear cover of the binder interconnected by the medial section which is foldable conformingly about the retaining assembly.

REFERENCES:
patent: 123947 (1872-02-01), Smith
patent: 2772427 (1956-12-01), Rankin
patent: 3145033 (1964-08-01), Caddov
patent: 3195924 (1965-07-01), Carter et al.
patent: 3228709 (1966-01-01), Tooker
patent: 3318618 (1967-05-01), Mullen et al.
patent: 3572957 (1971-03-01), Strassberg
patent: 4405156 (1983-09-01), Carter et al.
patent: 4856817 (1989-08-01), Moor

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