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US 6,601,299 B2Granted
Tapered fin and method of forming the same
AssigneeIBC Corporation
InventorAllan Stikeleather
Life of this patent
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Abstract
A method of forming an extended surface heat transfer fin by differentially rolling a metal strip having a wedge-shaped profile. The method includes linearly stretching the thicker edge of the metal strip to a greater degree than the thinner edge.
Claims12
A method of forming an extended surface heat transfer fin comprising:
- providing a metal strip having a first edge thicker than a second edge;
- and
- differentially rolling said metal strip to stretch the first edge of the strip to a greater extent than the second edge of the strip, whereby said first edge has a rolled thickness less than a rolled thickness of said second edge.
A method of forming an extended surface heat transfer fin comprising:
- providing a metal strip having a first edge thicker than a second edge and an aspect ratio of a width of the strip to the first edge greater than or equal to 10:1;
- differentially rolling said metal strip to stretch the first edge of the strip to a greater extent than the second edge of the strip, whereby said first edge has a rolled thickness less than a rolled thickness of said edge;
- and
- helically winding the strip around a tube.
1 more element
Dependencies are inferred from the claim text.