Appeal 2007-2868
Application 10/256,503
1. A covering for an architectural opening comprising in
combination:
covering means for selectively covering and uncovering the
architectural opening by extension and retraction of said covering means;
and
an operating mechanism mounted adjacent to said architectural
opening and being operatively associated with said covering means, said
mechanism including a braided control cord that was braided from yarn
under high tension and chemically coated while under high tension, and
abrasive operative elements including a friction brake, with which said
control cord is frictionally engaged.
7. A method of reducing the friction between a control cord of
a covering for an architectural opening and an operational mechanism in the
covering comprising the steps of:
braiding the control cord from polyethylene yarn under tension, and
chemically coating said cord under tension.
The Examiner relies upon the following references as evidence of
obviousness:
Englund US 3,918,513 Nov. 11, 1975
Eisler US 3,960,050 Jun. 1, 1976
Yamato US 5,232,769 Aug. 3, 1993
Kathryn L. Hatch (hereafter “Hatch”), Textile Science pp. 212-224, 252-260
(1st ed., 1993)
Appellants’ claimed invention is directed to a covering for an
architectural opening comprising an operating mechanism that includes a
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