SHEET METAL FASTENING SYSTEM
Original Publication Date: 1997-Apr-30
Included in the Prior Art Database: 2004-Apr-08
Xerox Disclosure Journal
There is provided a method for joining together two sheets of metaL A first metal sheet is provided with a slot. A second metal sheet is provided with a tab. In the joining operation, the tab on the second sheet is inserted through the slot of the first sheet. The protruding end of the tab is then punched with a tool to deform it into ears. The ears are twisted to extend beyond the slot envelope, which prevents the tab from being withdrawn through the slot and thereby provides the join.