(19)
(11) EP 0 375 012 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
02.01.1991 Bulletin 1991/01

(43) Date of publication A2:
27.06.1990 Bulletin 1990/26

(21) Application number: 89203101.4

(22) Date of filing: 07.12.1989
(51) International Patent Classification (IPC)5D01H 13/16
(84) Designated Contracting States:
BE CH DE ES FR GB GR LI

(30) Priority: 23.12.1988 IT 2308788

(71) Applicant: SAVIO S.p.A.
I-33170 Pordenone (IT)

(72) Inventor:
  • Sartoni, Sandro
    I-40026 Imola Bologna (IT)

(74) Representative: De Carli, Erberto et al
ING. BARZANO & ZANARDO MILANO S.p.A. Via Borgonuovo, 10
20121 Milano
20121 Milano (IT)


(56) References cited: : 
   
       


    (54) Method and device for monitoring the path and quality of the yarn under formation in a ring spinning machine


    (57) A method for continuously monitoring a moving yarn under formation and collection on a package (14) in a ring spinning machine, the method using a photoelectric or capacitive or piezoelectric transducer (2) positioned between the last pair of drafting rollers (8) and the underlying yarn guide element (4), or positioned to replace this latter, and a device for implementing this monitoring.







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