| 摘要 |
Packaging material, particularly for forming blanks for hinged lid packets, is delivered to a packaging machine in web form and at least one creasing or shaping operation is performed on the web 2 prior to severing individual blanks 50 from the web 2. Individual blanks 50 are inspected for longitudinal curl, usually caused by the web 2 having been wound on a reel, and where necessary a correction is applied during feeding of the web, by adjusting the angle of wrap of the web 2 around a decurling roller 108. Folding or wrapping of a blank around an article to be packed in the machine is monitored and the creasing or shaping operation varied to optimise machine performance: for example, an adjustable creasing tool can be adjusted to compensate for tool wear. |
