公开(公告)号：US3753847A

公开(公告)日：1973-08-21

申请号：US3753847D

申请日：1971-01-07

Applicant: ALUMINUM CO OF AMERICA

Inventor： GAYNER H ,  DEMSEY J

IPC: B21D51/38 ,  B21D51/44 ,  B32B15/08 ,  B65D8/16 ,  B65D17/34 ,  B65D65/42 ,  B65D83/14 ,  B32B27/36 ,  B32B27/30 ,  B32B27/38

CPC classification number: B21D51/44 ,  B21D51/383 ,  B32B15/08 ,  B65D17/404 ,  Y10T156/1064 ,  Y10T428/15 ,  Y10T428/24612 ,  Y10T428/269

Abstract: A METHOD OF MANUFACTURING A LAMINATED METAL CONTAINER WALL HAVING AN INTEGRAL OPENING DEVICE. PROVIDING A METAL SHEET, COATING THE SHEET WITH AN ADHESIVE SELECTED FROM THE GROUP CONSISTING OF EPOXY POLYSTER AND POLYURETHANE AND SUBSEQUENTLY SECURING TO THE SHEET BY MEANS OF THE ADHESIVE A CONTINOUS LAYER OF BARRIER MATERIAL SELECTED FROM THE GROUP CONSISTING OF LOW DESITY POLYETHYLENE, HIGH DENSITY POLYETHLYENE AND CAST POLYPROPYENE. SUBSEQUENTLY SCORING SAID SHEET TO DEFINE A SEVERABLE AND/OR REMOVABLE SECTOR AND LEAVING RESIDUAL METALS ALONG THE SCORE LINE OF A THICKNESS OF ABOUT 0.002 TO 0.006 INCH. SIMULTANEOUSLY WITH THE SCORING OPERATION REDUCING THE THICKNESS OF THE BARRIER MATERIAL IN THE REGIONS UNDERLYING THE SCORING THROUGH COMPRESSIBLY ESTABLISHED FLOW WITHOUT PENETRATING ENTIRELY THROUGH THE LAYER. AN OUTER PROTECTIVE MATERIAL SELECTED FROM THE GROUP CONSISTING OF A POLYESTER, POLYVINYLIDENE CHLORIDE, POLYVINYL CHLORIDE AND MEDIUM OR HIGH DENSITY POLYTHYLENE MAY BE CONTINUOUSLY SECURED TO THE BARIER MATERIAL A LAMINATED METAL CONTAINER WALL MADE BY THE ABOVE 0.002 METHOD HAVING A BARRIER MATERIAL THICKNESS OF ABOUT 0.002 TO 0.003 INCH IN THE PORTION NOT UNDERLYING THE SCORE LINE AND AREDUCE THICKNESS IN THE PORTION UNDERLYING THE SCORE LINE. THE BARRIER MATERIAL HAVING A CONTINUOUS PANEL COVERING STRUCTURE. AN OUTER PROTECTIVE MATERIAL SELECTED FROM THE GROUP CONSISTING OF A POLYESTER, POLYVINYLIDENE CHLORIDE, POLYVINYL CHLORIDE AND MEDIUM OR HIGH DENSITY POLYETHYLENE SECURED TO THE BARRIER MATERIAL.