Film with reinforcing tapes as well as apparatus and process of manufacturing the film

摘要

The foil is in the form of a web (10) with reinforcing strips (12) attached to it. These strips do not run in a straight line in the longitudinal direction (14) of the web, but are diverted relative to the longitudinal direction in a wavy line. They may be produced by pressing on one to the foil web, or by spraying them on to it.