A method of weft braking when picking the weft through a shed of a pneumatic weaving machine, device for carrying out the method and a braking jet

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(11)

EP 1 314 805 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	10.12.2003 Bulletin 2003/50

(43)	Date of publication A2:
	28.05.2003 Bulletin 2003/22

(21)	Application number: 02466001.1

(22)	Date of filing: 18.10.2002

(51)	International Patent Classification (IPC)⁷: D03D 47/30

(84)	Designated Contracting States:
	AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR
	Designated Extension States:
	AL LT LV MK RO SI

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Priority:

19.10.2001 CZ 20013766

(71)	Applicant: Vyzkumny Ustav Textilnich Stroju Liberec a.s.
	461 19 Liberec (CZ)

(72)	Inventors:
	Karel, Petr Londynskà 508 (CZ) Mlynar, Jiri Andelohorská 494 (CZ) Dvorak, Josef Na Perstyne 592 (CZ) Adamek, Karel Simackova 38 (CZ) Beran, Martin Odolenovice 14 (CZ)

(74)	Representative: Musil, Dobroslav, Dipl.-Ing.
	Cejl 38 602 00 Brno 602 00 Brno (CZ)

(54)	A method of weft braking when picking the weft through a shed of a pneumatic weaving machine, device for carrying out the method and a braking jet

(57) The invention relates to a method of weft (13) braking during the weft (13) picking through a shed on a pneumatic weaving machine in which the weft (13) being picked through a direct pick channel (3) of a reed (2) is exposed to a braking force (T) acting opposite the direction of the weft (13) motion. By braking force (T) acts upon at least a part of the length of the weft being picked weft (13) directly in the direct pick channel (3) and thus achieves both a reduction of the absolute value of the weft (13) deformations and a uniform distribution of the weft (13) deformations along the length of the weft (13).
The device for the weft (13) braking is comprising number of braking jets (9) having at least in the pick position of the reed (2) their ends fitted with pressure medium outlet apertures situated opposite the opening (30) of the direct pick channel (3) of the reed (2). The outlet apertures of the pressure medium of the braking jets (9) are in this position directed into the direct pick channel (3) opposite a wall of the direct pick channel (3), for instance opposite the bottom (4) of the direct pick channel (3), or at least partly opposite the direction of the weft (13) motion through the direct pick channel (3).

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