FINE TOOTH PERFORATION OF WEBS

摘要

Fine Tooth Preparation of Webs A web or sheet of material. such as paper and an improved line of perforation therein. The line of perforation is made up of alternating cuts and ties with the ties having a length along the line of perforation of no more than about 0.010 inches and being present in sufficient number along the line of perforation to provide a burst strength of about 8-20 pounds per two lineal inches of length of the line of perforation. Separation of the web or sheet along the line of perforation reveals no appreciably visible breakage of the ties. Also disclosed is a perforating blade for making such lines of perforation.