US 4,391,305 AGranted

Weft picking device of air jet type weaving loom

AssigneeNissan Motor Co., Ltd.

InventorTakao Takahashi

Life of this patent

Estimating the term…

Loading patent…

Abstract

A weft picking device of an air jet type weaving loom including a weft inserting nozzle, a plurality of air guide members which form an air guide channel through which a weft yarn from the weft inserting nozzle is picked into the shed of warp yarns, and an auxiliary nozzle disposed between a pair of adjacent air guide members and formed with a small nozzle opening through which auxiliary air is ejected, the nozzle opening being so located that the extension of the axis thereof intersects the axis of the air guide channel at an angle lying within a plane containing the axes of the nozzle opening and the air guide channel, thereby achieving effective weft picking and overcoming the drawbacks encountered in various conventional weft picking devices.

Claims15

Dependent claims

A weft picking device of an air jet type weaving loom, comprising:

(a) a weft inserting nozzle for injecting a weft yarn under the influence of an air jet therefrom to insert the weft yarn into the shed of warp yarns;
(b) a plurality of air guide members each having a generally looped section defining at the inner peripheral surface thereof an air guide opening, said loop section having a slit through which the weft yarn can leave said air guide opening, said air guide openings forming an air guide channel through which the weft yarn is picked into the warp yarn shed;
(c) an auxiliary nozzle in the shape of a pipe and having a nozzle opening through which an auxiliary air jet is ejected to enhance an air stream produced by the air jet from said weft inserting nozzle so as to assist weft picking, said nozzle opening of said auxiliary nozzle being so formed that the extension of the axis thereof intersects the axis of said air guide channel at a predetermined angle and is perpendicular to a tangent line of said air guide opening of one of said air guide members at a point on said inner peripheral surface of said loop section thereof;
and
(d) means for pushing aside the warp yarns when said auxiliary nozzle enters the array of warp yarns, said pushing aside means being located in the vicinity of said auxiliary nozzle and the dents of a reed.

2 more elements

A weft picking device of an air jet type weaving loom comprising:

(a) a weft inserting nozzle for injecting a weft yarn under the influence of an air jet issuing from said nozzle to insert the weft into the shed of warp yarns;
(b) a plurality of air guide members each having a generally looped section, each said air guide member having at its inner peripheral surface a substantially circular air guide opening, said loop section having a slit formed therein through which the weft yarn can leave said air guide opening, said air guide members being aligned so that said substantially circular air guide openings from an air guide channel through which the weft yarn is picked into the shed of warp yarns;
(c) an auxiliary nozzle in the shape of a pipe disposed between a pair of adjacent air guide members and having a nozzle opening through which an auxiliary air jet is ejected to enhance the air stream produced by said weft inserting nozzle to assist weft picking, said auxiliary nozzle opening being positioned so that the extension of the axis thereof intersects the axis of said air guide channel at a predetermined angle and lies in a plane containing the axes of said auxiliary nozzle opening and said air guide channel, and the axis of said auxiliary nozzle opening is perpendicular to a tangent line of one of said air guide openings at a point on said inner peripheral surface of said loop section;
and
(d) means for pushing aside the warp yarns when said auxiliary nozzle enters the array of the warp yarns, said means including a boat-like member positioned between said auxiliary nozzle and the dents of the reed, said boat-like member having a ridge extending from its top down its first side which faces the dents of the reed, said boat-like member further having symmetrical smooth surfaces extending from said ridge towards its second side which faces said auxiliary nozzle.

2 more elements

A weft picking device of an air jet type weaving loom comprising:

(a) a weft inserting nozzle for injecting a weft yarn under the influence of an air jet issuing from said nozzle to insert the weft into the shed of warp yarns;
(b) a plurality of air guide members each having a generally looped section, each said air guide member having at its inner peripheral surface a substantially circular air guide opening, said loop section having a slit formed therein through which the weft yarn can leave said air guide opening, said air guide members being aligned so that said substantially circular air guide openings form an air guide channel through which the weft yarn is picked into the shed of warp yarns;
(c) an auxiliary nozzle in the shape of a pipe disposed between a pair of adjacent air guide members and having a nozzle opening through which an auxiliary air jet is ejected to enhance the air stream produced by said weft inserting nozzle to assist weft picking, said auxiliary nozzle opening being positioned so that the extension of the axis thereof intersects the axis of said air guide channel at a predetermined angle and lies in a plane containing the axes of said auxiliary nozzle opening and said air guide channel, and the axis of said auxiliary nozzle opening is perpendicular to a tangent line of one of said air guide openings at a point on said inner peripheral surface of said loop section;
and
(d) means for supporting and for repositioning said auxiliary nozzle opening including an air guide member holder having a hole through which said auxiliary nozzle extends and also having a threaded section, a hollow support member disposed in said hole around said auxiliary nozzle, said hollow support member having a slit along its longitudinal axis, said hollow support member having a first tapered section contactable with a corresponding tapered section of said air guide member holder hole, said hollow support member also having a second tapered section, a hollow bolt disposed in said hole around said auxiliary nozzle, said hollow bolt having a tapered section contactable with said support member second tapered section, said hollow bolt having a threaded section engageable with said air guide member holder threaded section.

2 more elements

Dependencies are inferred from the claim text.