| 摘要 |
The apparatus has a mandrel (21) provided with a recess (22) in which is longitudinally displaceable a platen (23) whose cross-section complements that of the mandrel to form a fold profile. A blank of film material is folded around the mandrel and the platen by fold elements (12, 18) to form mutually overlapping edges which are provided with adhesive, e.g. hot melt adhesive, and are pressed together between a longitudinal presser (24) and the platen (23). The sleeve (23) so formed is stripped from the mandrel (21) by common displacement of the members (23, 24) while in their pressing position. The platen and the presser are returned to their starting positions after the pressure has been released. <IMAGE> |
