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:
Apr. 08, 1997
Filed:
Jan. 19, 1996
Ernst Fehrer, A-4020 Linz, AT;
Other;
Abstract
A drafting unit for a ring spinning device is described for use on a ring spinning device, comprising two delivery rollers (1, 2) defining between them a delivery nip (3) for at least one drawframe-treated roving (4), one of them forming a deflection length (5) with a slot-shaped suction zone (6) for the roving (4) exiting the exit nip (3), which extends between the delivery nip (3) and a pressure roller (7) arranged downstream in the sense of deflection, and having an air nozzle (8) offset sidewards with respect to the suction zone (6) for a blast of air directed towards the delivery roller (1) with a flow component transverse to the suction zone (6) which extends in an arc-shaped path between its feed end and its discharge end with the air nozzle (9) on the inside of the arc. To smoothly process long-staple fibres it is suggested that an additional air nozzle (9) associated with the pressure roller (7), which has a flow component transverse to the suction zone (6), be provided on the inside of the arc of the suction zone (6).