Salt-and-pepper denim
July 19, 2011. 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 References 3177644 Process and apparatus for producing a variable diameter alternate twist yarn Treatment of textile materials Brushed stretch denim fabric and process therefor: indigo dyeing Stretchable woven cellulosic fabric and process for making same Fabrics having salt-and-pepper patterns and crimped filament yarns for producing the same Fibrous product containing viscose Dyeing of fibrous materials Knitted fabric produced from indigo-dyed yarn Twisted, chemically stiffened cellulosic fibers and absorbent structures made therefrom Patent #: 4898642 InventorsAssigneeApplicationNo. 322130 filed on 03/10/1989US Classes:8/114.6, With fiber destruction or removal8/151.2, Yarns8/494, NOMINAL TEXTILE MANUFACTURE PROCESS COMBINED WITH DYEING8/504, PROCESS INVOLVING PLURAL APPLICATION STEPS WITH SAME DYE8/653, Indigoid dye57/252, Staple fiber blends68/29With free elementExaminersPrimary: Johnson, Jerry D.Attorney, Agent or FirmInternational ClassesD06Q 001/02D06Q 001/00 AbstractA method for producing a dyed cotton fabric having an improved characteristic salt-and-pepper look and the product thereof. The process includes forming a plurality of individual cotton yarns having a twist multiple value of at least 4.6 and, preferably, subjecting the twisted cotton yarn to exposure to a caustic solution under tension. The yarn then is dyed under tension by exposure to a dye liquor. The treated yarn is used to produce a woven fabric, which after being abraded, has a lighter portion dispersed throughout a darker portion. In the preferred embodiment the twist multiple value of the cotton yarn threads varies within the range of between 4.6 and 10.5.Other References
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