US 4,817,680 A · Method and system for introducing a weft thread of finite length in a storage shuttle of a weaving loom

Abstract

To introduce weft threads (31) or picks of finite length into a storage shuttle (1), the shuttle is formed with a longitudinal recess (4) which is divided into two chambers (11, 12) by a longitudinally extending separating wall (8) leaving a gap (10) between the bottom edge of the separating wall and the bottom wall (6) of the recess (4). Bristles or hairs extend preferably from both sides of the separating wall (8) towards the opposite wall (5, 5') defining the recess (4). A weft thread injector (2) is positioned to engage into the first chamber (11) to pneumatically inject the weft thread into the first chamber, to be retained in undulating or zig-zag pattern in the first chamber. Air is deflected by 180.degree. around the gap (10) and exhausted at an exhaust opening (14) leading from the second chamber (12). Preferably, a thread brake (19) is located at the trailing end of the shuttle, in the direction of relative movement between the shuttle and the injector to clamp the end of the injected weft thread.

Claims21

Dependent claims

A method of pneumatically introducing a weft thread or pick (31, 32) into a moving shuttle (1) in which a compressed air jet is emitted from an injector (2) and is utilized to introduce the weft thread or pick into the shuttle, which shuttle moves relative to the injector,

wherein, during said introduction, the air of said jet is constrained to follow a path transverse to the direction of relative movement of the shuttle and the injector,
comprising, in accordance with the invention, the steps of
guiding the air of said jet in a generally U-shaped path, by guiding said air into a first chamber (11) located in the shuttle, then deflecting the air within the shuttle by about 180.degree., and then, in a reverse direction of air flow, guiding said air into a second chamber (12) located adjacent and parallel to said first chamber, and then exhausting said air,
said chambers, extending along the longitudinal direction of the shuttle and being separated from each other by a separating wall leaving a communication gap to provide for air flow communication of said chambers;
and
separating said weft thread or pick from the air of the jet in the chamber first exposed to the air jet and forming a thread storage chamber (11), and locating the thread within the thread storage chamber along the length of the thread storage chamber by relatively moving the shuttle and the air jet.

3 more elements

A system for pneumatically introducing a weft thread (31) in a storage shuttle (1) in which a compressed air jet is utilized to introduce the weft thread into the shuttle and, upon said introduction, the air of said jet is constrained to follow a path transverse to the initial jet direction, said system having an injector (2), positioned with respect to the shuttle (1) for placement of the weft thread (31) therein while the shuttle and the injector move relative to each other along a longitudinal direction of the shuttle.

said system comprising, in accordance with the invention,
a recess (4) formed within the shuttle and extending essentially longitudinally thereof;
a separating wall separating said recess into two adjacent elongated chambers (11, 12) while leaving a communicating gap (10) between a bottom edge of the separating wall and a bottom wall portion (6) of said recess,
said injector (2) having an injection opening directing the air jet into the first chamber (11) to provide for air flow in a generally U-shaped path from the first chamber, deflection by about 180.degree. at the bottom wall of the recess, and exhaust through said second chamber (12);
and hairs or bristles (16) located at least in the first chamber (11) and forming a hairy or bristled region therein, with the hairs or bristles extending essentially transversely to the original direction of the air jet from said injector, said hairs or bristles being located close to each other and being resiliently deflectable from said essentially transverse direction.

2 more elements

Dependencies are inferred from the claim text.

Method and system for introducing a weft thread of finite length in a storage shuttle of a weaving loom

Life of this patent

Method and system for introducing a weft thread of finite length in a storage shuttle of a weaving loom

Life of this patent

Abstract

Claims21