Apparatus for removeably retaining sheet material

Details Apparatus for removeably retaining sheet material Apparatus for removeably retaining sheet material

1985-02-20

1987-09-15

Foss, J. Franklin

Supports

Easel; book, copy or music score holder

Mounted on wall or art device

2482891, 2483163, 24488, 24 67R, 211 89, A47F 700

Patent

active

046934430

ABSTRACT:
A holder for sheet material frictionally secures the sheet material intermediate a back plate and a plurality of rollers. A rigid planar plate in converging relationship to the back plate guides the rollers against the back plate to compress the sheet material against the back plate and frictionally retain the sheet material. On exertion upon the sheet material of a pulling force generally in the plane of the back plate, the compressive force will be increased and withdrawal of the sheet material will be prevented. A pulling force exerted upon the sheet material at a substantial angle with respect to the back plate will urge the rollers along the rigid planar plate away from the back plate resulting in removal of the compressive force and permitting release of the sheet material.

REFERENCES:
patent: 446486 (1891-02-01), Van Benthuysen
patent: 666674 (1901-01-01), Hoffman
patent: 1417009 (1922-05-01), Woodward
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patent: 2486279 (1949-10-01), Hathaway
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patent: 3399429 (1968-09-01), Goodman
patent: 3591013 (1971-07-01), Von Herrman
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patent: 4085848 (1978-04-01), Tsuge
patent: 4094415 (1978-06-01), Larson
patent: 4515277 (1985-05-01), Leth-Sorensen

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