Metal fusion bonding – Process – Plural joints
Patent
1993-08-17
1995-04-04
Ramsey, Kenneth J.
Metal fusion bonding
Process
Plural joints
29890, B01J 3502
Patent
active
054029287
ABSTRACT:
A fluted tube, defined by a multiplicity of parallel flutes extending over the length of the tube, is constructed by providing a flat portion of sheet metal, forming a series of undulations in one portion to form a corrugated section which is allowed to adjoin and be continuous with a flat section at a transition line or point. The sheet is engaged with tynes at the transition point and simultaneously welded as it is rolled into a spiral to form a multiplicity of flutes each bound by an undulation and a portion of the flat sheet metal. The flat sheet section can have a sufficient length so that it defines the last exterior layer of the spirally wound fluted structure to form a smooth walled, tubular envelope.
REFERENCES:
patent: 3966646 (1976-06-01), Noakes et al.
patent: 4186172 (1980-01-01), Scholz
patent: 4300956 (1981-11-01), Rosenberger
patent: 5153167 (1992-10-01), Saito et al.
Cook Dale
Hinkley Edwin
Mason Keith
Parkinson Steven
Preston Richard S.
Astech/MCI Manufacturing, Inc.
Ramsey Kenneth J.
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