Core metal insert with stress relief and method of making same
AssigneeScovil Hanna Corporation
InventorRoy L. Bonds
Life of this patent
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Abstract
A core metal insert is provided having a series, or multiple series, of laterally extending score marks in a non-reduced thickness portion, or portions, of the insert. Such score marks are provided in at least one face surface of the insert. The score marks provide stress relief so that when the corresponding precursor sheet metal blank is lengthened to produce the insert, the resulting insert will have a lesser tendency to contract from its lengthened state. A method of providing such a core metal insert also is provided.
Claims22
A method of providing stress-relief to a core metal insert, comprising the steps of:
- a) providing a sheet metal blank comprising opposed and longitudinally extending first and second edges, and opposed first and second face surfaces extending between said first and second edges and separated by a thickness of said sheet metal blank;
- b) providing a first plurality of laterally extending score marks in said first face surface of said sheet metal blank in a non-reduced-thickness portion thereof;
- c) lengthening said sheet metal blank to provide said core metal insert, wherein said first plurality of score marks provide stress relief to said core metal insert thereby reducing its contractile tendency to contract from its lengthened state;
- and
- d) extrusion-coating said core metal insert with a flexible material to provide a weatherseal.
A method of providing stress-relief to a core metal insert, comprising the steps of:
- a) providing a sheet metal blank comprising opposed and longitudinally extending first and second edges, and opposed first and second face surfaces extending between said first and second edges and separated by a thickness of said sheet metal blank;
- b) providing a first plurality of laterally extending score marks in said first face surface of said sheet metal blank in a non-reduced-thickness portion thereof;
- c) providing a pattern of through-slits in said sheet metal blank;
- and
- d) lengthening said sheet metal blank to provide said core metal insert;
- wherein said first plurality of score marks provide stress relief to said core metal insert thereby reducing its contractile tendency to contract from its lengthened state;
- and wherein on lengthening said sheet metal blank said through-slits are opened up, thereby forming a corresponding pattern of openings and/or slots in said core metal insert.
Dependencies are inferred from the claim text.