Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Impact driven fastener – e.g. – nail – spike – tack – etc. – Multiple prong – e.g. – nailing plate – staple – etc.
Patent
1980-05-19
1982-07-20
Britts, Ramon S.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Impact driven fastener, e.g., nail, spike, tack, etc.
Multiple prong, e.g., nailing plate, staple, etc.
411451, F16B 1500
Patent
active
043403310
ABSTRACT:
A staple for use in conjunction with an anviless stapling apparatus of generally U-shaped plan form configuration where the width of each end of the crown portion of the staple in a direction orthogonal to the plane of the staple is less than the effective width of the associated leg portions of the staple. Also, a self-clinching stapling apparatus, which has no anvil, and includes a nosepiece structure whose only moving part is a driver element. The nosepiece structure of the stapling apparatus defines a drive track whose cross section corresponds to the configuration of the crown portion of the specially designed staple. The nosepiece structure of the stapling apparatus further defines elongated grooves, disposed at an angle relative to the longitudinal axis of the drive track. During a stapling operation, the driver element is actuated causing the staple to move downwardly through the drive track towards the workpiece. The wider staple legs are simultaneously engaged in and guided by the angled grooves in the nosepiece structure. While the crown of the staple passes unimpeded through the drive track towards the workpiece, the wider staple legs are channeled and bent by the angled grooves.
REFERENCES:
patent: 1321623 (1919-11-01), Griswald
patent: 1512040 (1924-10-01), Reed
patent: 1554527 (1925-09-01), Saalfrank
patent: 1833786 (1931-11-01), Maraguglio
patent: 1855471 (1932-04-01), Buchanan
patent: 2111404 (1938-03-01), Pankonin
patent: 2180500 (1939-11-01), Bernstein
patent: 2191869 (1940-02-01), Stone
patent: 2202905 (1940-06-01), Goodstein
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