(19)
(11) EP 0 476 642 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
20.05.1992 Bulletin 1992/21

(43) Date of publication A2:
25.03.1992 Bulletin 1992/13

(21) Application number: 91115928.3

(22) Date of filing: 19.09.1991
(51) International Patent Classification (IPC)5: D01D 4/02
(84) Designated Contracting States:
AT BE CH DE DK ES FR GB GR IT LI LU NL SE

(30) Priority: 19.09.1990 US 585335

(71) Applicant: PHILLIPS PETROLEUM COMPANY
Bartlesville Oklahoma 74004 (US)

(72) Inventor:
  • Hatcher, Nimet Cinsoy
    Spartanburg, SC 29301 (US)

(74) Representative: Geissler, Bernhard, Dr.jur., Dipl.-Phys. et al
Patent- u. Rechtsanwälte Bardehle -Pagenberg-Dost-Altenburg- Frohwitter-Geissler & Partner Galileiplatz 1
81679 München
81679 München (DE)


(56) References cited: : 
   
       


    (54) Spinneret


    (57) An improved spinneret (10) and method for cleaning the same are disclosed in which the spinneret comprises a flat plate having a plurality of orifices (16) passing therethrough wherein the cross-section of each orifice is uniform throughout the thickness of the spinneret. The spinneret can be cleaned by peeling solidified polymeric material from the inner (12) face and the outer (14) face of the spinneret and thereby removing the solidified polymeric material from each spinneret orifice. This cleaning procedure eliminates the need for high heating techniques or potentially dangerous chemicals.






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