A large poster apparatus for a back-lighted signboard and a method of constructing same from a plurality of smaller poster sections, including improving the translucent quality of the poster material, aligning respective adjacent sections for exact image continuity, laminating a clear film over a first...http://www.google.fr/patents/US4362591?utm_source=gb-gplus-shareBrevet US4362591 - Large poster apparatus and method of constructing for back-lighted signboard
Large poster apparatus and method of constructing for back-lighted signboard
