Importance

Loading Importance Indicators...

Abstract

An apparatus for forming a score line in a pre-cut blank, such as an envelope blank (3), includes a scoring blade roller (6) and a counter roller (7), wherein a portion of the circumferential surface of the scoring blade roller (6) is provided with a suction shell (12) having a plurality of suction openings (13) therein. The suction openings are connected together in respective groups that may be individually and selectively connected to a vacuum or suction air source. In this manner, a leading edge portion (72) of the blank (3) can be taken up, held, and rotationally pulled by the scoring blade roller (6), while a tail portion (70, 71) of the blank (3) downstream of the score lines (2) or the scoring blades (33, 34) is not fixedly held on the scoring blade roller (6), but rather is only loosely held and guided along. A method of forming score lines in a blank avoids tearing, deforming or shifting the blank out of registration at the time of forming the score lines, by pulling the blank (3) in the transport direction by its leading edge, while leaving the tail end portion (70, 71) of the blank (3) downstream from the intended location of the score line (2) loose, so that it can freely move as necessary to carry out compensation movements while the score line is being formed.

Loading the Abstract Image...

First Claim