High fin density coil design utilizing precoated fin stock

Details High fin density coil design utilizing precoated fin stock High fin density coil design utilizing precoated fin stock

2005-05-03

2005-05-03

Leo, Leonard R. (Department: 3753)

Heat exchange

With coated, roughened or polished surface

C165S151000

Reexamination Certificate

active

06886628

ABSTRACT:
A method of manufacturing metal fins suitable for use in a heat exchanger which includes providing a coated patterned fin stock having a series of parallel stripes disposed longitudinally across the width of one surface of the fin stock. The stripe pattern is evenly spaced in the central portion of the fin stock, and staggered or more further spaced apart at the edges of said fin stock. The fin stock is passed through a series of forming dies to form or draw a plurality of tube receiving collared holes in the fin stock, followed by slitting or cutting the fin stock longitudinally to form a plurality of fin strips. The staggered spacing compensates for transverse movement of the fin stock during the drawing operation, and assures for accurate positioning of the collars between the fin stripes. The invention also includes the use of the fins in a high density coil design for use in a heat exchanger.

REFERENCES:
patent: 4741393 (1988-05-01), Collier
patent: 5775413 (1998-07-01), Kawanabe et al.

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