Abstract A roll of embossed paper towelling in which the embossing comprises lands and valleys between the lands wherein the lands are in rows extending at an acute angle to the longitudinal direction of the towelling. The acute angle of the rows of lands offsets each land with respect to the lands of the next adjacent turns or layers of the towel in the roll. That causes the layers to be held apart, and the desirable characteristics of the towels are preserved. There is also apparatus and a method for producing the embossed paper towelling. An embossing roll has a continuous spiral row of embossing elements or patterns which produce the embossing on the towelling. The spiral rows are at an angle of the order of five degrees from the longitudinal edges of the towels, i.e., the edges extending in the direction of the embossed sheet.
The method of producing an embossing roll which includes, the steps of, producing an embossing tool which has a cylindrical surface bearing a continuous spiral pattern of identical embossing designs, rotating an unembossed roll about a first axis at a predetermined peripheral rate, rotating said engraving tool about a second axis which is parallel with said first axis and with said axes being so spaced that said engraving tool mates with the surface of said unembossed roll, and moving said engraving tool axially at a rate relative to said peripheral rate so that it moves the axial dimension of said design patterns during each complete rotation of said unembossed roll whereby a continuous spiral embossing design is produced on said unembossed roll.
Claim 2
Independent Claim
122 words
The method of producing an embossing roll which includes, the steps of, producing an embossing tool which has a cylindrical surface bearing a continuous spiral pattern of identical embossing designs, rotating an unembossed roll about a first axis at a predetermined peripheral rate, rotating said engraving tool about a second axis which is parallel with said first axis and with said axes being so spaced that said engraving tool mates with the surface of said unembossed roll, and moving said engraving tool axially at a rate relative to said peripheral rate so that it moves the axial dimension of said design patterns during each complete rotation of said unembossed roll whereby a continuous spiral embossing design is produced on said unembossed roll.
Claim 3
Dependent Claim
47 words
The method as described in claim 1 wherein said continuous spiral pattern of identical embossing designs is at an angle of the order of 5° from the plane of the end surface of the unembossed roll and wherein said plane is transverse with respect to said axes.