US4445546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of operating a weaving machine
Assignee: Sulzer AG
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Filing: 1981-12-15
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Granted: 1984-05-01
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Expires: 2001-12-15
Abstract
Abstract The nozzles which are distributed over the width of the weaving machine remain activated after the passage of a weft yarn and are deactivated simultaneously upon termination of picking. Picking can be performed with fluid at a relatively low pressure so that the compressor for delivering the fluid can be relatively small.
Inventors
- 👤 Otto Hintsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:20
CPC Classifications
D; D03; D03D; D03D47/00; D03D47/28; D03D47/30; D03D47/3026; D03D47/3033; D03D47/304
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
76 words
A method of picking a weft yarn through a yarn travelling zone defined by a sequence of fluid discharge nozzles, and disposed across the weaving width of a weaving machine, said method comprising the steps of sequentially actuating each nozzle in said zone to eject a fluid medium into said zone for propelling the weft yarn along said zone; and thereafter de-activating the nozzles simultaneously upon termination of picking of the weft yarn through said zone.
Claim 2
Independent Claim
76 words
A method of picking a weft yarn through a yarn travelling zone defined by a sequence of fluid discharge nozzles, and disposed across the weaving width of a weaving machine, said method comprising the steps of sequentially actuating each nozzle in said zone to eject a fluid medium into said zone for propelling the weft yarn along said zone; and thereafter de-activating the nozzles simultaneously upon termination of picking of the weft yarn through said zone.
Claim 3
Dependent Claim
36 words
A method as set forth in claim 1 wherein each nozzle is initially actuated at a given pressure and remains actuated at a reduced pressure after passage of the weft yarn thereby until termination of picking.
Claim 4
Independent Claim
62 words
A method of picking a weft yarn through a travelling zone comprising pneumatically picking the weft yarn into the travelling zone; sequentially injecting each one of a series of adjacent air jets into said zone for propelling the weft yarn through said zone; and simultaneously de-activating the series of air jets upon termination of picking of the weft yarn through said zone.
Claim 5
Independent Claim
62 words
A method of picking a weft yarn through a travelling zone comprising pneumatically picking the weft yarn into the travelling zone; sequentially injecting each one of a series of adjacent air jets into said zone for propelling the weft yarn through said zone; and simultaneously de-activating the series of air jets upon termination of picking of the weft yarn through said zone.
Claim 6
Dependent Claim
37 words
A method as set forth in claim 3 which further comprises the step of reducing the pressure of each air jet to a low pressure value after passage of the weft yarn thereby until termination of picking.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-05-01 | 1987-10-31 | 1988-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-01 | 1991-10-31 | 1992-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-01 | 1995-10-31 | 1996-05-01 | $7700.00 | Window Closed / Lapsed |