| 摘要 |
An apparatus for producing envelope blanks has means for advancing a continuous web (W) of paper along a horizontal path, two sets of rotatable cutter blades (5, 6, 7) are located one on each side of the path of travel of the web (W). The blades are operable to cut out portions from each side of the web. The blades on each side of the said path being located on a common shaft (1 or 2). Each set of cutter blades comprises at least three cutter blades (5, 6, 7). Each blade is located on a cutter bracket mounted on the shaft so that the angular position of the blade on the shaft is adjustable through 360 DEG . Each blade in each set is located opposite a similar blade in the other set to form a matching pair and the cutting profiles of the blades in each set are different and including a cutting point in each blade. The positions of the common shafts (1 or 2) are also adjustable so that the sets of cutter blades are movable towards each other or away from each other as desired. <IMAGE> |
