CUTTING AND GROOVING APPARATUS AND METHOD FOR MAKING A BLANK PROVIDED WITH FOLDING LINES

摘要

1. A method of producing scores (8) in plastic foils (2) in order to form folding edges, whereby a heated scoring knife (5) is pressed into the foil (2) placed on a heated backing plate (1) and accordingly will receive a reduction (a) of the foil thickness due to the score (8) produced at this location, whereafter the foil (2) is moved further stepwise and is prepared to be bent at the produced scores (8) and to be raised for the forming of a packing, characterized in that the heating of the backing plate (1) is controlled such that a desired and selectable part of the entire thickness (delta) of the foil is heated up to the respective softening point of the foil material such that accordingly the elastic restoring force inherent in the foil material at the score (8) is adjusted to a desired and selected measure.