WERKWIJZE EN INRICHTING VOOR HET AANBRENGEN VAN DWARSE LASNADEN IN OP ELKAAR LIGGENDE BANEN VAN KUNSTSTOF- FOELIE.

摘要

In the production of transverse weld seams at intervals along a web of travelling superposed plastics films, the problem of weaknesses caused by shrinkage of each seam as it cools is solved by forming a loop in the web adjacent the intended seam and slackly clamping the web on each side of the loop before the seam is applied and the web released again.