Stationery

Details Stationery Stationery

1994-07-26

1996-04-30

Han, Frances

Books, strips, and leaves

Book, element thereof, or accessory therefor

Covers

281 211, 281 29, 402 73, B42F 1300

Patent

active

055118259

ABSTRACT:
A file comprises a rectangular cover having a front wing, a rear wing, and a spine between the wings. A lever arch mechanism is secured to the rear wing close to the spine to receive and retain thereon punched paper sheets. The side edges of the spine are inclined to the lower edge of the spine at a small angle. The file is extremely stable when standing on its lower edges. Another file has the cover in the form of a parallelogram with the side edges of the wings and spine parallel and inclined at a small angle to the top and bottom edges. A third file has its wings of rectangular shape with the lower edge of the spine inclined relative to the side edges of the spine.

REFERENCES:
patent: 1051527 (1913-01-01), Thompson
patent: 1109260 (1914-09-01), Stanley
patent: 1414758 (1922-05-01), Stavenhagen
patent: 4355821 (1982-10-01), Crawford
patent: 4744689 (1988-05-01), Sternberg
patent: 4848948 (1989-07-01), Pitts
patent: 4997207 (1991-03-01), Feldman
patent: 5209593 (1993-05-01), Ros
patent: 5222825 (1993-06-01), Wyant
patent: 5267804 (1993-12-01), Baumgarten

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