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:
May. 17, 1988
Filed:
Jul. 15, 1985
Hans Raasch, Monchengladbach, DE;
Theo Lembeck, Monchengladbach, DE;
W. Schlafhorst & Co., Monchengladbach, DE;
Abstract
A method of producing a twisted thread from spinning fibers by friction spinning includes moving two friction elements of a friction spinning machine in opposite directions defining a spinning wedge therebetween, at least one of the friction elements having a perforated wall, feeding spinning fibers into the spinning wedge in a given direction with a transporting air current, continuously withdrawing a twisted thread from the spinning wedge in the given direction, sucking a first part of the transporting air current through the perforated wall of at least one of the friction elements, and sucking a second part of the transporting air parallel to the spinning wedge, parallel to the thread and opposite to the given direction in which the thread is withdrawn and the fibers are fed into the spinning wedge, and a device for carrying out the method.