The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 18, 1978
Filed:
Apr. 18, 1977
Abstract
A method of automatically piecing up a yarn in an open-end spinning machine by rotating the draw off rollers and winding drum in a direction opposite to their normal rotating directions; rotating the feed rollers according to a predetermined program so that the feed rollers begin to rotate after an end of the yarn is moved back into the spinning rotor where the moved back yarn is pieced up with the newly spun yarn; rotating both the draw off rollers and the winding drum in their normal rotating direction, and starting the traverse motion of the traverse guide, which takes place after the pieced joint reaches a contacting line formed between the winding drum and the cheese. By utilizing this method and machine, the number of yarn breakages occuring during starting operation is decreased.