US3776282A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for metering and storing weft yarn for intermittent insertion into the shed of shuttleless looms
Assignee: Vyzkumny a Vyvojovy Ustav Zavodu Vseobecneho Strojirenstvi
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Filing: 1972-07-10
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Granted: 1973-12-04
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Expires: 1992-07-10
Abstract
Abstract Method of and apparatus for metering and storing continuously metered weft yarn for intermittent inserting into the shed of a shuttleless loom. In such method the weft yarn metering rate is higher than the winding of the same onto a yarn storage drum, the remaining portion of the metered weft yarn length being stored as a loose loop. The device comprises a storage drum provided with a gripper controlled by a cam disc, a metering drum, a chamber, on the entering side of the chamber there being provided a pressing roller attached to the metering drum, and on the exit side thereof there being provided a device for weft yarn braking.
Inventors
- 👤 Z Sevcik
- 👤 J Jankovsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:51
CPC Classifications
D; D03; D03D; D03D47/00; D03D47/34; D03D47/36; D03D47/361; D03D47/362; D03D47/368
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
74 words
A method of handling weft yarn for insertion in successive picks into a shuttleless loom, comprising continuously metering the yarn and feeding it forward into a loose loop, withdrawing the yarn from the loop and winding it on a storage drum at a rate less than that of the metering of the yarn, and intermittently withdrawing the yarn from the storage drum and inserting it in a pick into the shed of the loom.
Claim 2
Independent Claim
74 words
A method of handling weft yarn for insertion in successive picks into a shuttleless loom, comprising continuously metering the yarn and feeding it forward into a loose loop, withdrawing the yarn from the loop and winding it on a storage drum at a rate less than that of the metering of the yarn, and intermittently withdrawing the yarn from the storage drum and inserting it in a pick into the shed of the loom.
Claim 3
Dependent Claim
22 words
A method according to claim 1, wherein the yarn is retarded in the zone thereof between the loop and the storage drum.
Claim 4
Dependent Claim
44 words
A method according to claim 2, wherein in each pick the yarn is first withdrawn from the storage drum, and thereafter, in the final phase of the pick, the yarn is withdrawn from the loop under the retardation thereof imposed thereupon in said zone.
Claim 5
Dependent Claim
22 words
A method according to claim 1, wherein the metering and feeding of the yarn into the loop takes place at constant speed.
Claim 6
Dependent Claim
39 words
A method according to claim 1, wherein the yarn is gripped to wind it upon the storage drum between successive picks, and the gripping of the yarn on the storage drum is released at the beginning of each pick.
Claim 7
Dependent Claim
82 words
Apparatus for handling weft yarn for insertion in successive picks into a shuttleless loom, comprising means for continuously metering the yarn and feeding it forward into a loose loop, a storage drum, means for withdrawing the yarn from the loop and winding it on the storage drum at a rate less than that of the metering of the yarn, and means for intermittently withdrawing the yarn from the storage drum and inserting it in a pick into the shed of the loom.
Claim 8
Dependent Claim
82 words
Apparatus for handling weft yarn for insertion in successive picks into a shuttleless loom, comprising means for continuously metering the yarn and feeding it forward into a loose loop, a storage drum, means for withdrawing the yarn from the loop and winding it on the storage drum at a rate less than that of the metering of the yarn, and means for intermittently withdrawing the yarn from the storage drum and inserting it in a pick into the shed of the loom.
Claim 9
Dependent Claim
22 words
Apparatus according to claim 6, comprising means for retarding the yarn in the zone thereof between the loop and the storage drum.
Claim 10
Dependent Claim
46 words
Apparatus according to claim 7, wherein the means for intermittently withdrawing the yarn in each pick first withdraws it from the storage drum and thereafter, in the final phase of the pick withdraws the yarn from the loop under the retardation imposed thereupon in said zone.
Claim 11
Dependent Claim
22 words
Apparatus according to Claim 6, wherein the means for metering and feeding the yarn into the loop is driven at constant speed.
Claim 12
Dependent Claim
38 words
Apparatus according to claim 6, comprising means for gripping the yarn to wind it upon the storage drum between successive picks and for releasing such gripping of the yarn on storage drum at the beginning of each pick.
Claim 13
Dependent Claim
50 words
Apparatus according to claim 10, wherein the storage drum is rotatably driven, and the means to grip and release the yarn comprises a selectively radially outwardly advanceable and inwardly retractable finger on the drum, the finger when outwardly advanced forming a bight in the yarn passing around the storage drum.
Claim 14
Dependent Claim
68 words
Apparatus according to claim 6, wherein the storage drum is provided with a swinging yarn gripper controlled by a rotatable cam disc mounted coaxially of the storage drum, the drum being provided with a pulley by means of which the same is connected with an adjustable pulley driving a metering drum, the diameter of the pulley on the drum being larger than the diameter of the adjustable pulley.
Claim 15
Dependent Claim
46 words
Apparatus according to claim 12, comprising two guide plates arranged to define a loop-containing chamber, on the entering side of the chamber there being a pressing roller attached to the metering drum, and on the exit side thereof there being a device for weft yarn braking.
Claim 16
Dependent Claim
22 words
Apparatus according to claim 12, comprising a distributing disc with a curved yarn-receiving groove journalled adjacent the pressing roller in advance thereof.
Claim 17
Dependent Claim
41 words
Apparatus according to claim 12, wherein the means for retarding the weft yarn comprises an adjustably mounted rotatable cylindrical braking roller and a braking element adjustably mounted with respect thereto so that the yarn passes between the roller and the element.
Claim 18
Dependent Claim
22 words
Apparatus according to claim 12, wherein the adjustable pulley comprises radially adjustable jaws attached to a disc secured to the metering drum.
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) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |