Device for winding a band, in particular for a poster board having moving posters
OwnerJean-Claude Decauxinventor
Life of this patent
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Abstract
This device is of the type comprising a frame and two rollers which are mounted to rotate on the frame, about parallel axes. The band is fixed at both ends to the rollers. Means for driving in rotation at least one of the rollers and means for regulating the tension of the band between the rollers are provided. The means for driving in rotation are constantly engaged with the corresponding roller and means for regulating the tension of the band are means for relaxing the tension of the active part of the driving means and means for simultaneously increasing the tension of the passive part of the driving means.
Claims6
A device for winding a band from a roller onto another roller, of the type comprising a frame on which the two rollers are mounted to be rotatable about axes which are substantially parallel and are spaced a fixed distance apart, the band being fixed at its ends to said two rollers, a flexible transmission element providing a slip-free connection between the two rollers a direction, changing means movably mounted on the frame, means associated with the direction changing means for applying a substantially constant force on the direction changing means, means for limiting the tension of the band between the two rollers and comprising a flexible loop element of the flexible transmission of variable length passing around the direction changing means, said loop being so oriented that said force applying means acting on the direction changing means tend to lengthen the loop, and a motor directly engaging the flexible element for driving an assembly comprising the band and the two rollers.
Dependencies are inferred from the claim text.