Use of jagged cutters

A method for the production of rolls of relatively narrow double sided adhesive tape for securing sections of carpet, which tape is easily transversely tearable by hand, comprising the steps of:

• 1) unwinding a wide band of biaxially stretched double sided adhesive tape having a polypropylene backing having an upper and a lower surface and two longitudinal side edges, an adhesive layer on said upper and lower surfaces and a release paper on at least one of the adhesive-coated surfaces off an unwind shaft;
• 2) passing the unwinding band between said unwind shaft and a wind-up shaft over the surface of a cutting back-up roll;
• 3) cutting through the wide band of double faced adhesive tape to form narrow tapes by means of at least one cutter and cutting shaft;
• the cutter having a cutting edge of a profile such that it imparts to the cut tape in at least one side edge a series of continuous toothed notches of about 0.3 to 6 mm in height;
• and
• 4) collecting the narrow tapes on the wind-up shaft, whereby the resulting narrow tapes can be torn by hand transversely.