CREASING PLASTIC SHEET MATERIALS

摘要

A method of cold forming a crease line in a sheet plastics material (14) is disclosed which comprising the steps of positioning the sheet material (14) over a planar platen surface (2), and forming the crease line by bringing a scoring rule (4) into engagement with the plastic sheet material (18) and deforming the sheet material between the end of the rule (4) and the platen surface (2)