发明名称 METHOD OF AND APPARATUS FOR FORMING A JOINT BETWEEN A STEP AND A STILE OF A LADDER
摘要 Method comprising providing a first member 10 having an integral hollow section(s) 12, 12a extending therealong, forming an aperture 18 in the second member 11 by forcing the end portion(s) of the hollow section(s) 12, 12a, therethrough, and securing the protruding end portion(s) of the hollow section(s) 12, 12a to the second member 11.
申请公布号 EP0017486(B1) 申请公布日期 1983.10.05
申请号 EP19800301064 申请日期 1980.04.02
申请人 BAILEY, WILLIAM 发明人 BAILEY, WILLIAM
分类号 B21D39/06;B23P11/00;E06C7/08;(IPC1-7):21D39/06;06C7/08 主分类号 B21D39/06
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