Tube base notcher

Details Tube base notcher Tube base notcher

1992-06-22

1993-08-03

Crane, Daniel C.

Metal deforming

With cutting

By shearing tool-couple

72335, 72369, 29897312, B21D 700, B21D 3500

Patent

active

052318621

ABSTRACT:
A base (10) and the method for fabricating the corners (32) of the base (10) of a piece of furniture (12) from tubing (18) by notching the tube (18). The notching removes a metal from the tube (18) along the first pair of extremities (40) converging to an apex (44), and along a second pair of transverse extremities (52). Additional material is removed from the spaces (38) by removing a plug from the tube (18) adjacent the apex (44) in the shape of a bowl having two parallel sides (56), a third side (58) perpendicular thereto and a point (44). The tube (18) is folded at each point (44) creating corners (32) in the tube (18) each with a space (38) and an enlarged relief space (46) therebetween to allow fluids used in the post-fabrication operations, i.e., washing and painting, to flow quickly therefrom thus increasing drying times. The gussets (62) are welded to the tube (18) to add strength to the base (10).

REFERENCES:
patent: 283136 (1883-08-01), Mosler
patent: 390554 (1888-10-01), Betts
patent: 1615823 (1927-02-01), Barclay
patent: 2279063 (1942-04-01), Rogers
patent: 2462199 (1949-02-01), Kehoe
patent: 2535528 (1950-12-01), Brodbeck
patent: 3097684 (1963-07-01), Le Tarte
patent: 3672202 (1972-06-01), Barber
patent: 4073177 (1978-02-01), Leroux
patent: 4577915 (1986-03-01), Nishida
patent: 4974436 (1990-12-01), Nakatsuji

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