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
1997-05-01
1999-04-13
Wilson, Neill
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.
411473, 411920, F16B 1500, F16B 1502
Patent
active
058936955
ABSTRACT:
The invention pertains to an improvement upon staples, of the type used for fastening papers together and other materials together, whereby the crown of the staple is replaced with a rigid material extending beyond both staple prongs, allowing the staple to be removed by manually lifting up on the rigid material.
REFERENCES:
patent: 960206 (1910-05-01), Silverstein
patent: 1623335 (1927-04-01), De Bonis
patent: 2072125 (1937-03-01), Novick
patent: 2383135 (1945-08-01), Lang
patent: 2778019 (1957-01-01), Weimont
patent: 2912697 (1959-11-01), Westbrook
patent: 4129059 (1978-12-01), Van Eck
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