(19)
(11) EP 1 801 273 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
29.04.2009 Bulletin 2009/18

(43) Date of publication A2:
27.06.2007 Bulletin 2007/26

(21) Application number: 06021600.9

(22) Date of filing: 16.10.2006
(51) International Patent Classification (IPC): 
D03D 47/36(2006.01)
 D03D 47/34(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
Designated Extension States:
AL BA HR MK RS

(30) Priority: 22.12.2005 IT TO20050893

(71) Applicant: L.G.L. Electronics S.p.A.
24024 Gandino (Bergamo) (IT)

(72) Inventors:
  • Zenoni, Pietro
    24026 Leffe (BG) (IT)
  • Castelli, Rosario
    24024 Gandino (BG) (IT)

(74) Representative: Spandonari, Carlo et al
Spandonari & Modiano s.r.l. corso Duca degli Abruzzi 16
10129 Torino
10129 Torino (IT)

   


(54) Weft stock detector for weft feeders


(57) The detector is applied to weft feeders provided with a stationary drum (12) on which yam loops are wound to form a weft stock (RT). Three feeler arms (22, 24, 26) are hinged by side of the drum about respective axes (28, 30, 32) and are biased with their respective contact ends (34a) against the drum for swinging between an active lifted position and a lowered resting postion in relation to the presence/absence of loops on the drum. Photoelectric cells (42) arranged to detect the movements of the feeler arms each comprise an emitting diode (47) generating a stream of photons through an elongated narrow slot (48) extending radially, and a photodiode (50) in front of the slot (48). The feeler arm has a shield (52) insertable between the diode and the photodiod and delimited frontally by a rectilinear edge (54) aligned to the outer edge of the slot with the feeler arm in its resting position, in order to obscure the slot.







Search report