Board for writing with pen producing erasable marking, the board

Details Board for writing with pen producing erasable marking, the board Board for writing with pen producing erasable marking, the board

1987-02-09

1988-09-27

Kazenske, E. R.

Binder device releasably engaging aperture or notch of sheet

Resilient sheet retainer requiring deflection for sheet removal

Releasably attached to keeper

281 39, 281 50, 24 6711, B42F 1302, B42F 100, B42D 500, B42D 1700

Patent

active

047737867

ABSTRACT:
A board for writing by means of a pen producing erasable marking comprises a header (2) fixed to it by means of a hooking device which permits the header to be removed from the board and hooked again an infinite number of times without damaging any part of the header or the board. The hooking device consists of wings (7) which act as a guide when the board and the header are assembled, a pair of elements (8) of inverted "U" shape which are inserted into a pair of openings (6) located in the board.

REFERENCES:
patent: 2879609 (1959-03-01), Watkins
patent: 3524225 (1970-08-01), Trikilis

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