Plastic clipboard having elastic engaging pins

Details Plastic clipboard having elastic engaging pins Plastic clipboard having elastic engaging pins

1992-09-30

1993-10-19

Rosenbaum, Mark

Binder device releasably engaging aperture or notch of sheet

Sheet retainer with releasable keeper

Keeper including apertured or recessed sheet retainer...

402 80P, 281 43, 281 44, B42F 1312, B42F 1336

Patent

active

052539431

ABSTRACT:
A clipboard for holding worksheets is disclosed, which is a plastic rectangular board bent into a largely inverted U-shaped cross-section having a vertical front board, an also vertical backside board that is larger in length than the front board, and a horizontal top roof member between the front and backside boards. A book of worksheets is clamped between the front and backside boards below the roof member. A hook for hanging the clipboard is centrally fixed in the roof member and having means t orient the clamped worksheets in two alternative different vertical planes perpendicular to each other. A pair of bosses centrally mounted in the backside board and each having at a front end thereof a downwardly inclined end face for engagement with a pair of apertures formed in the front board through a pair of holes in an upper margin of each worksheet clamped.

REFERENCES:
patent: 415189 (1889-11-01), Cumingham
patent: 647143 (1900-04-01), Marshall
patent: 869379 (1907-10-01), Mills
patent: 1008047 (1911-11-01), Mooney
patent: 1133655 (1915-03-01), Morgan
patent: 1841903 (1932-01-01), McGonigle

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