Patent US2847497A successfully refreshed from Google Patents.
US3914929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for continuously producing slub yarn
Assignee: Mitsubishi Chemical Corp
•
Filing: 1974-01-30
•
Granted: 1975-10-28
•
Expires: 1994-01-30
Abstract
Abstract A slub yarn having a hand spun silk yarn-like appearance and feel to the hand is continuously produced from a multifilament yarn by feeding the multifilament yarn into a reduced pressure region formed in a hollow column at a predetermined feed rate while vigorously sucking air from the atmosphere through the region, agitating the multifilament yarn by the sucked air current to convert portions of the yarn into slubs consisting of portions of the yarn and/or the individual filaments entangled, intertwined, looped, bent and/or folded by action of the sucked air vortex or turbulent current, and delivering the resultant slub yarn from the reduced pressure region at a delivery rate lower than the feed rate.
Inventors
- 👤 Kiyoshi Adachi
- 👤 Iwao Miyashita
- 👤 Kiyoto Haba
- 👤 Kunio Shibata
- 👤 Eizi Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:25
CPC Classifications
D; D02; D02G; D02G3/00; D02G3/22; D02G3/34; D02G1/00; D02G1/16; D02G1/162
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
136 words
A process for continuously producing slub yarns comprising the steps of: providing a reduced pressure region in a closed hollow column and connected to the atmosphere through a yarn supply hole at an end of said column and a yarn delivery hole located at an opposite end of said column, by sucking air from the atmosphere through said region; feeding a multifilament yarn into said reduced pressure region through said yarn supply hole at predetermined feed rate while sucking air through said region; agitating said fed multifilament yarn in said reduced pressure region by action of the sucked air current in order to convert portions of said multifilament yarn into slubs; and delivering said resultant slub yarn from said reduced pressure region through said yarn delivery hole at a delivery rate lower than said feed rate.
Claim 2
Dependent Claim
136 words
A process for continuously producing slub yarns comprising the steps of: providing a reduced pressure region in a closed hollow column and connected to the atmosphere through a yarn supply hole at an end of said column and a yarn delivery hole located at an opposite end of said column, by sucking air from the atmosphere through said region; feeding a multifilament yarn into said reduced pressure region through said yarn supply hole at predetermined feed rate while sucking air through said region; agitating said fed multifilament yarn in said reduced pressure region by action of the sucked air current in order to convert portions of said multifilament yarn into slubs; and delivering said resultant slub yarn from said reduced pressure region through said yarn delivery hole at a delivery rate lower than said feed rate.
Claim 3
Dependent Claim
24 words
A process as claimed in claim 1, wherein said fed multifilament yarn is sucked onto an air-permeable surface provided within said reduced pressure region.
Claim 4
Dependent Claim
18 words
A process as claimed in claim 2, wherein said fed multifilament yarn temporarily stays on said air-permeable surface.
Claim 5
Dependent Claim
27 words
A process as claimed in claim 1, wherein said sucked air is formed into two currents in opposite directions to each other within said reduced pressure region.
Claim 6
Dependent Claim
31 words
A process as claimed in claim 1, wherein said slub yarn delivered from said reduced pressure region is rebundled by the action of an air jet blown onto the slub yarn.
Claim 7
Dependent Claim
28 words
A process as claimed in claim 1, wherein said slub yarn delivered from said reduced pressure region is bonded by applying a bonding agent to the slub yarn.
Claim 8
Dependent Claim
35 words
A process as claimed in claim 1, wherein said slub yarn delivered from said reduced pressure region is tightened by heating it at a temperature at which the looped or loosely entangled individual filaments shrink.
Claim 9
Dependent Claim
22 words
A process as claimed in claim 1, wherein said multifilament yarn is lightly bundled before feeding it into said reduced pressure region.
Claim 10
Dependent Claim
17 words
A process as claimed in claim 1, wherein said multifilament yarn is a crimped or textured yarn.
Claim 11
Dependent Claim
19 words
A process as claimed in claim 1, wherein said multifilament yarn consists of two or more component multifilament yarns.
Claim 12
Dependent Claim
14 words
A process as claimed in claim 10, wherein said component yarns are the same.
Claim 13
Dependent Claim
16 words
A process as claimed in claim 10, wherein said component yarns are different from each other.
Claim 14
Dependent Claim
25 words
A process as claimed in claim 12, wherein said component yarns are one or more crimped multifilament yarns and one or more regular multifilament yarns.
Claim 15
Dependent Claim
23 words
A process as claimed in claim 12, wherein said component yarns are thermoplastic polymer multifilament yarns different in melting point from each other.
Claim 16
Dependent Claim
51 words
A process as claimed in claim 14, wherein said slub yarn consisting of said thermoplastic polymer multifilament yarns different in melting point from Each other, is heat treated at a temperature lower than the higher melting point but not lower than the lower melting point of said thermoplastic polymer multifilament yarns.
Claim 17
Dependent Claim
32 words
A process as claimed in claim 1, wherein a ratio of difference between said feed rate and said delivery rate to said delivery rate is in a range from 5 to 300%.
Claim 18
Dependent Claim
29 words
A process as claimed in claim 1, wherein said yarn is, after slub-forming, further re-bundled within said reduced pressure region by action of a vortex of the sucked air.
Claim 19
Dependent Claim
12 words
A process as claimed in claim 1, wherein said yarn travels upward.
Claim 20
Independent Claim
131 words
An apparatus for continuously producing a slub yarn from a multifilament yarn, comprising: a slub-forming device comprising a closed hollow column having a yarn supply plate located at an end of said column and having a yarn supply hole formed thereon and a yarn delivery plate located at an opposite end of said column and having a yarn delivery hole formed thereon; feed means for feeding a multifilament yarn at a predetermined feed rate into said slub-forming device through said yarn supply hole; delivery means for deliverying a slub-yarn at a predetermined delivery rate lower than said feed rate from said slub-forming device through said yarn delivery hole, and; means for sucking air from the atmosphere through said slubforming device, said means being connected to the periphery of said hollow column.
Claim 21
Independent Claim
131 words
An apparatus for continuously producing a slub yarn from a multifilament yarn, comprising: a slub-forming device comprising a closed hollow column having a yarn supply plate located at an end of said column and having a yarn supply hole formed thereon and a yarn delivery plate located at an opposite end of said column and having a yarn delivery hole formed thereon; feed means for feeding a multifilament yarn at a predetermined feed rate into said slub-forming device through said yarn supply hole; delivery means for deliverying a slub-yarn at a predetermined delivery rate lower than said feed rate from said slub-forming device through said yarn delivery hole, and; means for sucking air from the atmosphere through said slubforming device, said means being connected to the periphery of said hollow column.
Claim 22
Dependent Claim
23 words
The apparatus of claim 19 wherein said means for sucking air is connected to the periphery of said hollow column by a pipe.
Claim 23
Dependent Claim
19 words
An apparatus as claimed in claim 20, wherein said pipe is provided with an air permeable partition located therein.
Claim 24
Dependent Claim
16 words
An apparatus as claimed in claim 19, wherein said hollow column has a circular cross-sectional profile.
Claim 25
Dependent Claim
16 words
An apparatus as claimed in claim 19, wherein said hollow column has an irregular cross-sectional profile.
Claim 26
Dependent Claim
56 words
An apparatus as claimed in claim 19, wherein said hollow column of said slub-forming device is divided into two compartments with an air permeable partition disposed in parallel to the yarn travel path from the yarn supply hole to the yarn delivery hole, between the yarn travel path and the entrance of said air suction means.
Claim 27
Dependent Claim
16 words
An apparatus as claimed in claim 24, wherein said hollow column has a square cross-sectional profile.
Claim 28
Dependent Claim
84 words
An apparatus as claimed in claim 19, wherein said hollow column of said slub-forming device has a yarn storage inner hollow column located therein and surrounding the yarn travel path between said yarn supply hole and the yarn delivery hole, said yarn storage inner hollow column having a yarn supply end connected to the yarn supply end plate of said hollow column, the other end opening in said hollow column and a plurality of small holes formed on the yarn supply end portion thereof.
Claim 29
Dependent Claim
42 words
An apparatus as claimed in claim 26, wherein said small holes on said inner hollow column are formed in such a manner that the longitudinal axes of said holes do not intersect the longitudinal axis of said yarn storage inner hollow column.
Claim 30
Dependent Claim
40 words
An apparatus as claimed in claim 26, wherein said small holes on said inner hollow column are formed in such a manner that the longitudinal axes of said holes intersect the longitudinal axis of said yarn storage inner hollow column.
Claim 31
Dependent Claim
82 words
An apparatus as claimed in claim 26, wherein said hollow column further comprises an air suction member located between said yarn delivery end plate and said yarn storage inner hollow column and having a center opening and one or more air suction holes through which said center opening is connected to atmosphere, said air suction holes being formed in such a manner that the longitudinal axes of said air suction holes do not intersect with the longitudinal axis of said center opening.
Claim 32
Dependent Claim
100 words
An apparatus as claimed in claim 29, wherein said hollow column of said slub-forming device is further provided with an air vortex inner hollow column extending froM said air suction member toward said yarn storage inner hollow column and surrounding said yarn travel path, said air vortex inner hollow column having a plurality of small holes formed on its periphery in such a manner that the longitudinal axes of the holes do not intersect with the longitudinal axis of the air vortex inner hollow column, and a hole formed on its one end facing said yarn storage inner hollow column.
Claim 33
Dependent Claim
24 words
An apparatus as claimed in claim 26, wherein said yarn storage inner hollow column has an inside wall surface containing sharply edged fine particles.
Claim 34
Dependent Claim
22 words
An apparatus as claimed in claim 19, wherein said hollow column has an inside wall surface made of sharply edged fine particles.
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) | 1978-10-27 | 1979-04-28 | 1979-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-27 | 1983-04-28 | 1983-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-27 | 1987-04-28 | 1987-10-28 | $7700.00 | Window Closed / Lapsed |