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:
Jun. 24, 1997
Filed:
May. 01, 1995
Werner Billner, Ingolstadt, DE;
Josef Breitenhuber, Buxheim, DE;
Rieter Ingolstadt Spinnereimaschinenbau AG, Ingolstadt, DE;
Abstract
In preparation of the piecing process in an open-end rotor spinning device, negative pressure is first applied in a housing containing the spinning rotor, and the rotor cover is brought from its operating position into a fiber evacuation position in which it is lifted off from the housing. Fiber feeding is then switched on. The fiber stream produced thereby, together with the air stream which conveys the fibers is deflected and is evacuated by means of the negative pressure prevailing in the housing over the open rotor edge from the interior of the rotor and from the housing, until the rotor cover is brought back into its operating position to convey fibers to the fiber collection groove. To carry out this process, a controllable opening device which is connected to the control device controlling the piecing process, and by means of which the rotor cover can be brought into a fiber evacuation position and into an operating position, and a seal ensuring tightness between the two parts of the fiber feeding channel in both positions of the rotor cover are assigned to the rotor cover.