公开(公告)号：EP1385646A4

公开(公告)日：2006-03-15

申请号：EP02725976

申请日：2002-05-09

申请人： R F CABLES LLC

发明人： DOHERTY JOHN

IPC分类号： B21C37/15 ,  B21D15/06 ,  B21C37/20 ,  H01B13/00

CPC分类号： H01B13/0009 ,  B21C37/205 ,  B21D15/06

摘要： A method and apparatus for forming annularly-corrugated tubes (10) and cables utilizing a multiple gear corrugating head (30) which is rotated about the tube (10) or cable, to be corrugated as the tube or cable (10) is drawn through the head (30). Two or more of the gears (24) each have a different prime number of gear teeth (26) which form the corrugation (12). A radio-frequency cable (10) formed by the invention exhibits greater consistency and quality than cables produced by conventional corrugating gear heads, and in particular, show improved VSWR characteristics.