Roller for glue applying folding machines

Claim 1

In a paper folding machine which uses rollers that are fixedly and transversely mounted between bearing blocks, which rollers advance the paper to be folded, and wherein apparatus is provided for dispensing at least one glue line onto a sheet of paper prior to folding, said apparatus including a transversely mounted adjustable glue head, and wherein at least one of the rollers comprises a shaft mounted in said bearing blocks, a plurality of roller elements detachable mounted to said shaft in fixed non-rotational relation, each of said roller elements having individual transverse adjustment means cooperating with said shaft to provide unlimited transverse adjustments while said shaft is in said machine, in which at least one of said roller elements is spaced from the other roller elements to provide a space therebetween so that a sheet of paper with a least one glue line thereon may be gripped and advanced by said roller, said roller elements each including a collar, a resilient covering of urethane secured to said collar and having a durometer in the range from 60 to 70, and said covering having a plurality of helical grooves thereon separating a plurality of flat faces.