Method of checking the yarn profile associated with a yarn piecing operation in an open-end spinning machine

US5832709A · kind A · utility

Assignee

• W. Schlafhorst AG & Co. · DE

Inventors

• Manfred Lassmann · Nettetal, DE
• Heribert Mertens · Willich, DE

Key dates

• Filing date: Dec 20, 1996
• Grant date: Nov 10, 1998
• Expiry date: Dec 20, 2016

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B65H2701/31
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method includes dividing a yarn into various sections with reference to the pieced yarn section, with each section being characteristic of the piecing process. A yarn profile in each section is measured and evaluated against criteria specific to each section, whereby a yarn defect and its position on the yarn are determined and from which the cause for the defect is determined. The pieced yarn section is also divided into three subsections and each subsection is measured and evaluated against certain subsection criteria for the detection of fluff, trash accumulation and fiber sloughing.