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US 4,864,712 AGranted
Method for producing a fabric covered metal rail
AssigneeHunter Douglas Inc.
InventorsL. Eugene Carden, Richard N. Anderson
Life of this patent
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Abstract
A fabric covered metal rail suitable for use as a top or bottom rail in a fabric Venetian blind and method for producing such a rail by first laminating a fabric strip to a metal strip and then roll forming the laminated strip into the rail.
Claims11
A method for forming a fabric covered metal tubular blind rail, comprising the steps of:
- (a) laminating together an elongated fabric strip and an elongated thin metal strip to form a laminated strip with the longitudinal edges of the fabric strip extending along and spaced inwardly of the longitudinal edges of the metal strip to provide exposed longitudinal side portions in the metal strip;
- (b) roll forming the laminated strip into a tubular shape by passing the laminated strip longitudinally through a series of roller dies;
- and
- (c) bending each of the longitudinal side portions of the metal strip into U-shaped lockseam parts joined to each other in a lockseam.
1 more element
Dependencies are inferred from the claim text.