Patent ID: 7967233

Claim:
In a system of poles and webs provided on spools in cartridges mounted in the poles, the webs being biased toward wound positions on the spools, and each cartridge rotatably supporting a spool so that a web can be unwound from the spool through a slot in the pole, the improvement to the cartridge comprising; an annular shell (C) defining an internal cylindrical wall, a head shaft centered in said shell, and a one piece elastomeric coupling ( 1 ) provided inside said fixed shell, and having an elliptically shaped center portion ( 2 ) connected to said head shaft for rotation therewith, said coupling defining at least two outer portions ( 5 , 5 ) , each with a frictional contact area (T,T FIG. 05 ) in circumferential contact with said internal shell wall, said coupling having at least two resiliently deformable connective portions ( 4 , 4 ) integrally connecting said central portion ( 2 ) to each of said outer portions ( 5 , 5 ) respectively, said resiliently deformable connective portions being spaced closely to the elliptically curved central portion of said one piece coupling, each of said at least two outer portions and each of said at least two connective portions spiralling outwardly around said elliptical center portion in the direction of rotation of said spool during biased web winding rotation of the spool.