Binder device releasably engaging aperture or notch of sheet – Sheet retainer with releasable keeper – Keeper including apertured or recessed sheet retainer...
Patent
1985-07-15
1986-11-04
Bell, Paul A.
Binder device releasably engaging aperture or notch of sheet
Sheet retainer with releasable keeper
Keeper including apertured or recessed sheet retainer...
402 14, B42F 1302, B42F 1308
Patent
active
046208127
ABSTRACT:
A fastener for securing files of paper, documents, and the like that consists of a base having two side sheet retainers and two additional center sheet retainers. A keeper therefore has three equally spaced perforations through which the sheet retainers pass and are bent, to be held down in the keeper groove by locks. Two center sheet retainers project through the center perforation and are bent in opposite directions to be locked.
REFERENCES:
patent: 1658052 (1928-02-01), Kline
patent: 2526975 (1950-10-01), Siegfried
patent: 2536792 (1951-01-01), Windt
patent: 2637326 (1953-05-01), Witz
Bell Paul A.
Linn Terence J.
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