Insulating material with pre-cut aids uses mutually parallel lines at angle to material sides with pre-spaced cut aid marks along lines to simplify cutting variations.

摘要

The cutting aid marks (20,24) in the cutting operation comprize a series of parallel lines (20) set at an angle to the transverse line of the material (10) and the marks (24) consist of a set or orientating lines (24a,24b,24c). The line (24a,24b,24c) spacing (a) measured along the material (10) equals the product of half the material (10) width and the tangent of the angle set, specifically 45 deg . Each parallel line (20) should have (N) marks (24) in accordance with (N = Bo-1). In this (Bo) is the width of the material (10) being a multiple of 100 or 10 or 5 mm, and material rolls up as shown.