Apparatus for tensioning a cover sheet over an open-topped recta

Details Apparatus for tensioning a cover sheet over an open-topped recta Apparatus for tensioning a cover sheet over an open-topped recta

1982-06-16

1984-11-27

Scherbel, David A.

Land vehicles: bodies and tops

Tops

Roll-up covers

296100, 160243, 242 75, 135 89, 135903, 135DIG5, B60J 1100

Patent

active

044847777

ABSTRACT:
Apparatus for drawing taut a cover sheet over a box opening such as a truck box or a walled building of rectangular plan form provides stop members mounted on a longer sidewall presenting stop surfaces spaced below a longitudinal edge, the surfaces forming a socket for captively seating a tubular or bar shaped roller to which the sheet is tangentially attached. The sheet is fully unwound from the roller in covering the opening, and an overhanging sheet portion is tensioned by a fractional turn of the roller additionally in the unwinding direction, causing the roller to press upwardly against a stop surface engaging the top of the roller and to press inwarldy against a stop surface, with the overhanging portion disposed as a rain-shedding eaves maintaining a seal at the longitudinal edge and terminating under a clamp tangent to the roller. When the roller is turned in the winding-up direction it automatically unlocks and swings free, then traverses the sheet roll to the opposite side of the opening to stored position.

REFERENCES:
patent: 1744686 (1930-01-01), Pease
patent: 2976082 (1961-03-01), Dahlman
patent: 3061364 (1962-10-01), Tantlinger et al.
patent: 3314717 (1967-04-01), Wild
patent: 3806185 (1974-04-01), Brandjord
patent: 4212492 (1980-07-01), Johnsen
patent: 4302043 (1981-11-01), Dimmer et al.
patent: 4380350 (1983-04-01), Block

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