Unit for scoring webs of paper in the lengthways direction

Claim 1

A scoring unit for the lengthwise scoring of a web of paper, comprising first and second rolls for gripping two sides of said web and advancing said web, said first roll having a keyway running therealong; means for driving at least one of said rolls; a collar mounted about said first roll and means allowing radial play between said collar and said first roll, said collar having a radial groove formed therein; a sharp-edged wheel supported on said collar; a back-up part disposed opposite to said sharp-edged wheel so as to cooperate therewith to score the web as it is fed therebetween; coupling means for driving said collar from said first roll, comprising a driver ring mounted adjacent the collar and having a radial screw with an inner end functioning as a key by which it is keyed on said first roll allowing said driver ring to be keyed at a number of different positions along the first roll, and an axial pin extending from said ring for drivingly joining said ring with said collar, said pin being receivable in said radial groove in said collar, said collar being thereby permitted to float radially, and to be driven while out of round with respect to said first roll; a support rod extending parallel to said rolls; and a carriage slidably supported on said support rod and connected to the collar for adjusting the position of said collar and sharp-edged wheel along the first roll.