AN IMPREGNATED AND SERRATED CUTTING STRIP FOR A CARTON

摘要

A serrated cutting strip (26) for a carton comprises paper or board impregnated with a mix of acrylic resin and urea formaldehyde. The strip is 0.2 to 0.5 mm in thickness and can bend without cracking over a bar of 20 mm diameter. The strip has adhesive on one side and a release sheet (28) on the adhesive. The strip is applied to a carton by apparatus (10) which comprises rollers (44, 45) for advancing a substrate sheet (24), a cutter (12), an edge (46) in front of the cutter (12) and means (44, 45) for drawing a release sheet (28) away from the edge (46).