Metal carrier and manufacturing method of metal carrier

Abstract

A metal carrier according to the present invention is produced by superposing a metal flat sheet and a metal corrugated sheet on each other and winding them. In a winding end when the corrugated sheet and the flat sheet are wound, a corrugation height of the corrugated sheet is gradually lowered.

1 . A metal carrier produced by superposing a metal flat sheet and a metal corrugated sheet on each other and winding them, wherein 
 a corrugation height of the corrugated sheet is gradually lowered in a winding end when the flat sheet and the corrugated sheet are wound.    
   
   
       2 . A manufacturing method of a metal carrier produced by superposing a metal flat sheet and a metal corrugated sheet on each other and winding them, wherein 
 in a winding end when the flat sheet and the corrugated sheet are wound, tops of corrugations of the corrugated sheet are sandwiched and fixed from a mountain side and a valley side, machining is performed such that an interval between the fixed tops of the corrugations is gradually widened, thereby gradually lowering a corrugation height of the corrugated sheet, the machined corrugated sheet and flat sheet are wound, thereby producing the metal carrier.    
   
   
       3 . A manufacturing method of a metal carrier produced by superposing a metal flat sheet and a metal corrugated sheet on each other and winding them, wherein 
 in a winding end when the flat sheet and the corrugated sheet are wound, machining is performed such that tops of corrugations of the corrugated sheet are pushed, one by one, into grooves formed such that interval therebetween is gradually widened, thereby gradually lowering a corrugation height of the corrugated sheet, the machined corrugated sheet and flat sheet are wound, thereby producing the metal carrier.    
   
   
       4 . A manufacturing method of a metal carrier produced by superposing a metal flat sheet and a metal corrugated sheet on each other and winding them, wherein 
 in a winding end when the flat sheet and the corrugated sheet are wound, pins are inserted into valleys of corrugations of the corrugated sheet from both sides of the corrugated sheet, machining is performed such that an interval between the inserted pins is gradually widened, thereby gradually lowering a corrugation height of the corrugated sheet, and after the machined corrugated sheet is subjected to press machining, the press machined corrugated sheet and flat sheet are wound, thereby producing the metal carrier.