Method for making light-transmitting slats for blind
Patent 4792427 Issued on December 20, 1988. Estimated Expiration Date: 
April 9, 2007. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
April 9, 2007. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesInventorAssigneeApplicationNo. 07/036302 filed on 04/09/1987US Classes:264/285, Bending264/134, Coating or impregnating workpiece before molding or shaping step264/280, Reshaping running or indefinite-length work264/295, Molding followed by bending or twisting264/320, Reshaping solid work or introducing solid work into mold cavity264/339Bending or twisting of workExaminersPrimary: Silbaugh, Jan H.Assistant: Kutach, Karen D. Attorney, Agent or FirmInternational ClassesB29C 53/04 (20060101)B29C 53/00 (20060101) B29C 67/00 (20060101) E06B 9/26 (20060101) E06B 9/386 (20060101) E06B 9/266 (20060101) E06B 9/38 (20060101) AbstractA method for making light, thin, thermoplastic slats for use in decorative window blinds of the Venetian or vertical rotatable slat types. Strips are prepared of flexible and resilient planar thermoplastic material of not more than 1/16 inch thickness with selected light transmitting qualities. The strips are then deformed into a permanent V-shaped cross-sectional configuration which is stiff and will not sag when supported by spaced blind slat supporting means. The deformation step is accomplished by bending the strips without the application of heat over a forming surface of not more than 1/4 inch radius to exceed the elastic limit of the strip material over the radius.Field of SearchCoating or impregnating workpiece before molding or shaping stepForming continuous work followed by cutting Plurality of holes Dividing work to form plural articles Sheet or web work Reshaping running or indefinite-length work Creping or crinkling Bending Molding followed by bending or twisting Reshaping solid work or introducing solid work into mold cavity Bending or twisting of work | |
