Metal fusion bonding – With means to deform work – filler – or flux portion before... – Comprising means forming one-piece blank into a tubular shape
Patent
1975-04-23
1976-12-14
Smith, Al Lawrence
Metal fusion bonding
With means to deform work, filler, or flux portion before...
Comprising means forming one-piece blank into a tubular shape
210457, 219 62, 291573AH, B21C 37083, B21C 3712
Patent
active
039970981
ABSTRACT:
A thin perforate, helically wound welded edge tubing is used as a filter core for a roving wound filter. The slightly roughened external edges of the spirally formed welded joint greatly adds to the ability of securing the fiber roving to the tube and prevents relative slippage therebetween. Also, the invention comprehends an apparatus for, and a method of making the helically seamed tube by first drawing a sheet metal from a supply and raising two lateral edges thereof to form flanges. The material can be guided in a helical path by engaging the inside of the flanges so that the trailing edge abuts the leading edge. The abutted edges are heated so that the flanges themselves provide the filler for a weld on the exterior surface thereof. Drive rollers are provided to move the welded tube from the welding area and to torque the tube to prevent edge separation prior to the cooling of the weld.
REFERENCES:
patent: 1294465 (1919-02-01), Horvath
patent: 2233233 (1941-02-01), Williams
patent: 3090336 (1963-05-01), Gruter
patent: 3240177 (1966-03-01), Habdas
patent: 3356226 (1967-12-01), Miller et al.
patent: 3487537 (1970-01-01), Lombardi
Brunswick Corporation
Epstein Sheldon L.
Guttman David S.
Heimovics John G.
Ramsey K. J.
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