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:
Mar. 28, 1989
Filed:
Oct. 08, 1987
Theo Lembeck, Monchen-gladbach, DE;
W. Schlafhorst & Co., Monchen-gladbach, DE;
Abstract
A friction spinning apparatus includes first and second perforated drums forming a spinning wedge therebetween with a spinning zone. The drums are driven in the same direction with the first drum having a greater circumferential speed than the second drum and with the first drum rotating into the spinning wedge and the second drum rotating out of the spinning wedge. The drums define an imaginary line at a location at which the drums are closest to each other. First and second suction devices are disposed in the interior of the first and second drums. The suction devices each have an intake slit formed therein. The intake slits follow paths diverging from each another and from the imaginary line at least at forward ends thereof. The intake slits are directed against the spinning wedge and each discharge in the vicinity of the inner surface of a respective one of the drums. Substantially greater suction action is supplied in the first suction device at a rearwardly directed end of the spinning zone than in the second suction device. A fiber supply device has a fiber guide channel with a slit-like fiber outlet opening formed therein and disposed in the spinning wedge, and a yarn draw-off device is provided.