公开(公告)号：US3618817A

公开(公告)日：1971-11-09

申请号：US3618817D

申请日：1970-05-14

Applicant: RHEEM MFG CO

Inventor： TROUGHTON THOMAS D

IPC: B21D51/28 ,  B23K11/06 ,  B23K33/00 ,  B65D25/14

CPC classification number: B23K11/063 ,  B21D51/28 ,  B23K33/00 ,  B23K2201/12 ,  B65D25/14

Abstract: A shell or body tube for a relatively large container such as a tin-lined pail adapted for use in storing and shipping food products and the like, and a method of making such body tube. The method utilizes as the starting material a flat metal sheet plated along at least one side thereof with a layer of tin, and the sheet has longitudinal edge portions respectively terminating in unfinished edges. The plated sheet is bent upon itself along one longitudinal edge portion thereof to form a generally Ushaped section having the tin plating therealong facing outwardly; and the sheet is then formed into a tube having the longitudinal edge portions thereof overlapped and seam welded to each other in close proximity with the unfinished edge of the Ushaped section but on the side thereof at which there are only two juxtaposed layers of the metal sheet. The seam weld and temperature developed therefor are controlled so that the heat of fusion dissipating transversely through the body tube from the situs of the weld fuses the contiguous layers of tin plating along the U-shaped section, thereby isolating both of the unfinished longitudinal edges of the body tube from the interior thereof.