Patent EP0114047A2 successfully refreshed from Google Patents.
EP0114047A2
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EP
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Method and apparatus for inserting weft threads in multiple-color air jet looms
Assignee: Tsudakoma Corp
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Filing: 1984-01-07
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Granted: —
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Expires: 2004-01-07
Abstract
Abstract © Multiple-color air jet looms successively insert different kinds of weft threads into warp sheds to weave a fabric of desired construction. The different weft threads are subjected to different resistances to their being drawn through a main nozzle and are carried on air jets under different conditions, so that the weft threads will be inserted unstably at different speeds. With the arrangement of the invention, selected weft threads for insertion are carried, one at a time, through the warp shed under respective different weft carrying forces suited for the weft threads. The different weft carrying forces may be produced by varying pressures at which air is ejected, intervals of time during which air is ejected under pressure, or the manner in which subnozzles are positioned along the warp shed. There is provided a control means for changing the air pressures and ejection time intervals in synchronism with operation of the air jet loom.
Inventors
- 👤 Kanji Tsuji
- 👤 Yasuyuki Tamatani
- 👤 Takashi Senoo
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 14:55
CPC Classifications
D; D03; D03D; D03D47/00; D03D47/28; D03D47/30; D03D47/3026; D03D47/3053; D03D47/3033; D03D47/3046
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
91 words
A method of inserting a selected one,at a time, of different weft threads through a warp shed from one end thereof to the other end in a multiple-color air jet loom having nozzle means for ejecting air under pressure along the warp shed to carry the weft thread through the warp shed, said method comprising the step of ejecting air from said nozzle means for carrying the different weft threads, selected one at a time, through said warp shed with different weft carrying forces preset respectively for the different weft threads.
Claim 2
Independent Claim
91 words
A method of inserting a selected one,at a time, of different weft threads through a warp shed from one end thereof to the other end in a multiple-color air jet loom having nozzle means for ejecting air under pressure along the warp shed to carry the weft thread through the warp shed, said method comprising the step of ejecting air from said nozzle means for carrying the different weft threads, selected one at a time, through said warp shed with different weft carrying forces preset respectively for the different weft threads.
Claim 3
Dependent Claim
46 words
A method according to claim 1, wherein said nozzle means solely comprises a main nozzle disposed at an end of the warp shed, said air being ejected from said main nozzle selectively for different intervals of time preset to produce said different weft carrying forces, respectively.
Claim 4
Dependent Claim
45 words
A method according to claim 1, wherein said nozzle means solely comprises a main nozzle disposed at an end of the warp shed, said air being ejected from said main nozzle selectively with different ejection forces preset to produce said different weft carrying forces, respectively.
Claim 5
Dependent Claim
39 words
A method according to claim 1, wherein said nozzle means includes subnozzles arrayed along said warp shed, said air being ejected from said subnozzles selectively for different intervals of time preset to produce said different weft carrying forces, respectively.
Claim 6
Dependent Claim
38 words
A method according to claim 1, wherein said nozzle means includes subnozzles arrayed along said warp shed, said air being ejected from said subnozzles selectively with different ejection forces preset to produce said different weft carrying forces, respectively.
Claim 7
Independent Claim
194 words
An apparatus for inserting a selected one, at a time, of different weft threads through a warp shed in a multiple-color air jet loom, comprising: (a) a source of air under pressure; (b) a plurality of main nozzles connected to said source and disposed alongside of the warp shed for ejecting air under pressure to insert the selected weft thread into the warp shed; (c) a plurality of subnozzles arrayed along the warp shed and connected to said source for ejecting air under pressure to urge the inserted weft thread through the warp shed in a weft inserting direction; (d) pipes interconnecting said source and said main nozzles and subnozzles and including on-off valves; (e) air control means disposed in said pipes for the, compressed air ejected from said main nozzles to be at an appropriate-pressure and subnozzles dependent on the selected weft thread and for supplying air under said pressure by controlling said on-off valves to said main nozzles and said subnozzles for an interval of time dependent on said selected weft thread; and (f) control means for issuing a control command to said air control means dependent on said selected weft thread.
Claim 8
Independent Claim
194 words
An apparatus for inserting a selected one, at a time, of different weft threads through a warp shed in a multiple-color air jet loom, comprising: (a) a source of air under pressure; (b) a plurality of main nozzles connected to said source and disposed alongside of the warp shed for ejecting air under pressure to insert the selected weft thread into the warp shed; (c) a plurality of subnozzles arrayed along the warp shed and connected to said source for ejecting air under pressure to urge the inserted weft thread through the warp shed in a weft inserting direction; (d) pipes interconnecting said source and said main nozzles and subnozzles and including on-off valves; (e) air control means disposed in said pipes for the, compressed air ejected from said main nozzles to be at an appropriate-pressure and subnozzles dependent on the selected weft thread and for supplying air under said pressure by controlling said on-off valves to said main nozzles and said subnozzles for an interval of time dependent on said selected weft thread; and (f) control means for issuing a control command to said air control means dependent on said selected weft thread.
Claim 9
Dependent Claim
62 words
An apparatus according to claim 6, wherein said control means comprises an on-off command unit actuatable in synchronism with operation of the air jet loom for selectively issuing on-off commands indicative of different intervals of time during which air is to be supplied to said main nozzles and subnozzles, said different intervals of time being dependent respectively on said different weft threads.
Claim 10
Dependent Claim
32 words
An apparatus according to claim 6, wherein said control means comprises a switching command unit for selectively supplying air under different pressures dependent on said different weft threads to said on-off valves.
Claim 11
Dependent Claim
49 words
An apparatus according to claim 6, wherein said subnozzles are divided into at least two groups capable of producing different weft carrying forces, said groups of the subnozzles being selectively actuatable, one group for each weft insertion, by said control means dependent on the weft thread to be inserted.
Claim 12
Dependent Claim
29 words
An apparatus according to claim 9, wherein said subnozzles in the respective groups are spaced at different pitches along the warp shed for producing said different weft carrying forces.
Claim 13
Dependent Claim
28 words
An apparatus according to claim 9, wherein the subnozzles in the respective groups have nozzle orifices of different effective cross-sectional areas for producing said different weft carrying forces.
Claim 14
Dependent Claim
35 words
An apparatus according to claim 9, wherein_one of said groups of the subnozzles and another group of the subnozzles are positioned at different distances from the warp shed for producing said different weft carrying forces.
Claim 15
Dependent Claim
36 words
An apparatus according to claim 9, wherein one of said groups of the subnozzles and another group of the subnozzles are directed at different angles to the warp shed for producing said different weft carrying forces.
Claim 16
Dependent Claim
80 words
An apparatus according to claim 9, wherein said different weft carrying forces are produced by a selective combination of different pitches of the subnozzles, different effective cross-sectional areas of nozzle orifices of the nozzles, different distances of the nozzles from the warp shed, different angles at which the nozzles are directed to the warp shed, different pressures under which air is supplied to the subnozzles, and different intervals of time during which under pressure air is supplied to the subnozzles.
References Cited (Backward Citations)
No citation records indexed.
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