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Method of making a wall-rung
申请号	US22852162	申请日	1962-10-05	公开(公告)号	US3374532A	公开(公告)日	1968-03-26
申请人	HEINRICH ZENHAUSERN;			发明人	HEINRICH ZENHAUSERN;
摘要
权利要求	1. A METHOD OF MAKING A WALL-RUNG FROM A METAL TUBE COVERED WITH SLEEVE OF SYNTHETIC MATERIAL COMPRISING THE STEPS OF LOOSELY MOUNTING THE SLEEVE IN A COLD STATE ON THE TUBE, HOLDING THE TUBE AND SLEEVE AT THE MIDDLE BETWEEN THE ENDS THEREOF, AND BENDING THE TUBE INTO A WALL-RUNG SHAPE AND AT THE SAME TIME LENGTHWISE STRETCHING THE SLEEVE TO CAUSE THE SAME TO GRIP THE TUBE.
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