Method of making a three dimensional applique

Abstract

Abstract A DIE HAVING RAISED RIDGES CORRESPONDING TO A DESIGN TO BE PROVIDED IN DEPRESSED FORM ON AN APPLIQUE IS MOUNTED ON ONE ELECTRODE OF A HIGH-FREQUENCY WELDING APPARATUS. ONTO THE COOPERATING COUNTERELECTRODE IS PLACED A SANDWICH COMPOSED OF A LAYER OF TEFLON LOCATED BETWEEN A LAYER OF SILICONE AND A LAYER OF MYLAR WITH THE LATTER FACING THE ASSOCIATED COUNTERELECTRODE. A LAYER OF SYNTHETIC PLASTIC FOAM AND A LAYER OF POLYVINYLCHLORIDE ARE SUPERIMPOSED AND PLACED BETWEEN THE TWO ELECTRODES. THEREUPON THE ELECTRODES ARE MOVED TOGETHER AND THE LAYER OF FOAM AND POLYVINYLCHLORIDE ARE BONDED TO ONE ANOTHER UNDER PRESSURE AND SIMULTANEOUS APPLICATION OF HEAT ALONG ZONES FORMED BY THE RAISED RIDGES AND ALONG WHICH ZONES THE FOAM COLLAPSES. THE ELECTRODES ARE THEN MOVED APART AND BETWEEN THE SANDWICH AND THE LAYER OF FOAM IS INSERTED ANOTHER LAYER OF THERMOPLASTIC MATERIAL, WHEREUPON THE ELECTRODES ARE AGAIN MOVED TOGETHER AND THE NEW LAYER OF THERMOPLASTIC MATERIAL IS BONDED TO THE FIRST-MENTIONED LAYER OF THERMOPLASTIC MATERIAL AND THE LAYER OF FOAM ALONG THE AFOREMENTIONED ZONES, BUT PRESSURE AND HEAT ARE APPLIED FOR A BRIEFER PERIOD OF TIME AND TO A LESSER EXTENT THAN BEFORE.

Inventors

• 👤 M Kuroda

Bibliographic Details