Electric heating – Metal heating – For bonding with pressure
Patent
1977-04-25
1979-01-23
Kucia, Richard R.
Electric heating
Metal heating
For bonding with pressure
291573A, 291573C, 126271, 219102, 2191171, B23K 1102
Patent
active
041362721
ABSTRACT:
Method for manufacturing heat exchange panels each comprising a plurality of sub-panels of finite length, each sub-panel comprising a metal tube welded to a metal sheet except at the end portions thereof which are secured to headers in fluid-tight relation thereto, in which method tubing and metal sheet having a length several times the length of the sub-panel are continuously advanced and welded together by high frequency electric current which is interrupted periodically so that a unit several times the length of a sub-panel and having tubing welded to the sheet by a weld which is continuous except at portions of the tubing spaced apart longitudinally by a distance substantially equal to the length of a sub-panel. The unit is cut at the unwelded portions to provide several sub-panels which are assembled to form the heat exchange panels. The metal sheet may be bent during manufacture of the unit to provide sub-panels having stiffening ribs or having projections for interlocking adjacent sub-panels.
REFERENCES:
patent: 2809276 (1957-10-01), Smith
patent: 3047712 (1962-07-01), Morris
patent: 3319040 (1967-05-01), Ruda
patent: 3327088 (1967-06-01), Rudd
patent: 3375344 (1968-03-01), Kohler
patent: 3541296 (1970-11-01), Rudd
Kucia Richard R.
Thermatool Corporation
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