| 摘要 |
A method of manufacturing a flat heat-exchanger tube from thin, flexible metal strip material, comprising the steps of bending first and second longitudinal edge portions of the strip into an overlapping position over a central portion of said strip, bending the innermost edge portion in the vicinity of its edge at an angle to the remaining portion of said last mentioned edge portion to form a support flange and pressing said edge portions together under reaction from said central portion, via the support flange pressed thereagainst, while joining said longitudinal edge portion by means of soldering. |
