Printing on both sides of an advertising medium, e.g. for banners or flags, includes laminating with a central opaque material, e.g. plastic film

摘要

A mainly textile advertising medium is made by laminating two materials printed on one side to a sandwich with an opaque layer at the center. The two outer materials are guided from a supply roll so that the images are lined up. The opaque layer can be a composite plastic film with white outer sides and a black inner layer. The outer layers can have a lower melting point than the inner layer. Bonding can be by applied adhesive or by laminating between heated platens. Lining up of the printed material can be by means of a pneumatic brake on the calender. The central layer or the entire sandwich can be perforated regularly or irregularly over its surface to improve air permeability.