Metal deforming – By use of non-deforming work-gripping clamp and relatively... – Plural or complex apparatus
Patent
1995-06-05
1997-05-27
Crane, Daniel C.
Metal deforming
By use of non-deforming work-gripping clamp and relatively...
Plural or complex apparatus
72312, 72400, 72420, B21D 516
Patent
active
056321783
ABSTRACT:
A method and apparatus is described for forming a T-shaped slot a sheet of material. The sheet of material is clamped to a top surface of an arbor. The arbor has a uniform T-shaped cross section having two undersides of the T-shape. The sheet of material is first formed into an inverted U-shape and then the sheet of material is bent to conform to the undersides of the arbor forming the T-shaped slot. The arbor is withdrawn from an open end of the formed T-shaped slot.
REFERENCES:
patent: 404164 (1889-05-01), Buckman
patent: 948551 (1910-02-01), Rigby
patent: 3768294 (1973-10-01), Van Dijk
patent: 3838590 (1974-10-01), Van Dijk
patent: 4091652 (1978-05-01), Wilcox
patent: 4573296 (1986-03-01), Wrigley
Chiodo Peter
Rudnisky Walter
Uhlemann Karl
Crane Daniel C.
Fors Arne I.
Horne D. Doak
Imai Jeffrey T.
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