Frame apparatus

Details Frame apparatus Frame apparatus

1989-01-06

1990-10-02

Crammer, Laurie K.

Card, picture, or sign exhibiting

Signs

Stretched or tensioned

40611, G09F 1700

Patent

active

049599160

ABSTRACT:
The device comprises frame apparatus that is usable to maintain a poster 7 or other area of sheet material in a substantially taut condition by gently stretching the same. FIGS. 1 and 2 illustrates an embodiment in which the canvas 7 or the like is stretched by helical compression springs 4 in only one direction whereas FIGS. 3 to 6 illustrates an embodiment in which said canvas 7 or the like is stretched by springs 4 and 11 in two coplanar and relatively perpendicular directions. The use of the invention will allow paper and other sheet materials to be displayed in such a way that any small changes in dimensions due to ageing or changes in ambient conditions are automatically compensated for by expansion or contraction of the frame apparatus.

REFERENCES:
patent: 1540516 (1925-06-01), Davis et al.
patent: 1842274 (1932-01-01), Landwehr et al.
patent: 1974076 (1934-09-01), Lindenberger
patent: 2072754 (1937-03-01), Jones
patent: 2720718 (1955-10-01), Vaniman
patent: 3550297 (1970-12-01), Friedrichsen
patent: 4580361 (1986-04-01), Hillstrom et al.

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