This invention relates to fastening sheets of deformable material together and more particularly to clinch joints and {HEAD ~ methods} and apparatus for {TAIL ~ forming clinch joints} of both the leak proof and lanced type joints 
for
This invention relates to fastening sheets of deformable material together and more particularly to clinch joints and { HEAD ~ methods } and apparatus for { TAIL ~ forming clinch joints } of both the leak proof and lanced type joints
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