Apparatus for combining perforated papers into stacks

Details Apparatus for combining perforated papers into stacks Apparatus for combining perforated papers into stacks

1994-06-24

1996-03-12

Han, Frances

Binder device releasably engaging aperture or notch of sheet

Coiled spring type sheet retainer

402 53, B42F 1302

Patent

active

054980909

ABSTRACT:
An apparatus for combining a stack of perforated papers contains a pin provided with a widened head, which has a round thread along its shank. The pin is passed through the holes until it abuts with its head. A nut member is screwed onto the threaded shank projecting from the other side. The pin member, together with the nut member, is manufactured by injection moulding and in one piece in a split mould.

REFERENCES:
patent: 635409 (1899-10-01), Van Sickle
patent: 1695220 (1928-12-01), Wolf
patent: 2132950 (1938-10-01), Green
patent: 2560110 (1951-07-01), Horn
patent: 2586556 (1952-02-01), Mullikin
patent: 3102571 (1963-09-01), Scott
patent: 3251260 (1966-05-01), Serdechny
patent: 4351626 (1982-09-01), Holmes
patent: 4991990 (1991-02-01), Frank et al.
patent: 4997208 (1991-03-01), Staats, III

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