# US 4,380,254 A · Weft guidance tube for looms

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- Number: US 4,380,254 A
- Document ID: US4380254A
- Status: Granted
- Kind: A
- Application number: 06/299,848
- Filed: 1981-09-08
- Granted: 1983-04-19
- Earliest claimed: 1981-09-08
- Assignees: Leesona Corporation
- Inventors: James H. Bonasch; William J. Bouchard, Jr.
- Web page: https://patentgrep.com/patent/US4380254A

## CPC

- D03D 47/302: {Auxiliary nozzles}
- D03D: WOVEN FABRICS; METHODS OF WEAVING; LOOMS

## Abstract

A weft guidance tube for a fluid weft insertion system of weaving apparatus includes an elongated member having a longitudinal channel therein. A plurality of segments are juxtaposed in the channel. Each of the segments includes a base and an upper end, with the upper end having an aperture therein and an exit slot extending from the aperture. The base of each segment is wider in cross-section than the upper end thereof. Connecting pins project outwardly from one side of each base to thereby permit connection of adjoining segments to each other. When so connected the apertures and exit slots of all of the segments arranged in the channel are in proper alignment and the upper end of each segment is spaced apart from the upper end of adjoining segments by a distance goverend by the width of bases of the segments. The plurality of segments are secured to the channel by suitable gripping means.

## Claims

### Claim 1

A weft guidance tube for a fluid weft insertion system comprising, an elongated member having a longitudinal channel therein, a plurality of segments juxtaposed in said channel, each said segment including a base and an upper end, said upper end having an aperture therethrough and an exit slot extending from said aperture, connecting means on each segment for connecting each segment to an adjacent segment with the apertures and exit slots of said segments being in alignment, the base of each said segment being wider in cross-section than the upper end thereof to thereby space said upper ends from each other when said segments are juxtaposed, and means for securing said plurality of segments in said channel.

### Claim 2 (depends on 1)

A weft guidance tube as set forth in claim 1 wherein said connecting means includes a plurality of pins protruding from one side of each segment and pin receiving holes formed in the opposite side of said segment.

### Claim 3 (depends on 1)

A weft guidance tube as set forth in claim 1 wherein said apertures are defined by an inclined boundary surface, and including a source for a fluid and weft projected into said tube, said apertures narrowing in the direction of movement of said fluid and weft through said tube.

### Claim 4 (depends on 3)

A weft guidance tube as set forth in claim 3 wherein said source for said fluid and weft is aligned coaxially with said tube.

### Claim 5 (depends on 1)

A weft guidance tube as set forth in claim 1 wherein said means for securing said segments includes slot means within said channel, and wedge means engagable in said slot means and arranged to bear on said segments to thereby secure said segments in said channel.

### Claim 6 (depends on 1)

A weft guidance tube as set forth in claim 1 wherein said elongated member includes first and second sections, fastening means for joining said first and second sections together with said channel defined between said sections, and rib means within said channel arranged to engage with said segments to thereby secure said segments in said channel.

### Claim 7 (depends on 6)

A weft guidance tube as set forth in claim 6 wherein the base of each segment is provided with recess means for receiving said rib means.

### Claim 8 (depends on 6)

A weft guidance tube as set forth in claim 6 wherein said first and second members include respective contact surfaces, said first and second members being rockable relative to each other on said surfaces to thereby permit sliding movement of said segments along said channel while precluding movement of said segments upwardly in said channel.

### Claim 9

A segment for use in a weft guidance tube wherein a fluid and weft entrained in the fluid are projected into said tube comprised of a plurality of such segments for delivery through the shed of loom comprising; a base and an upper end, said upper end having an aperture therethrough and an exit slot extending from said aperture, connecting means on said segment for connecting said segment to an adjacent segment with the aperture of said segment and said adjacent segment being in alignment, the base of said segment being wider in cross-section than said upper end thereof to thereby space the upper end of said segment from the upper end of said adjacent segment when said segments are connected, and means on said base for connection with a member for holding said segment.

### Claim 10 (depends on 9)

A segment as set forth in claim 9 wherein said aperture is defined by a boundary surface inclined inwardly in the direction of movement of said fluid and weft therethrough.

### Claim 11 (depends on 9)

A segment as set forth in claim 9 wherein said connecting means includes pin means protruding from one side of said segment and pin receiving hold means on the opposite side of said segment.