Patent US3879928A successfully refreshed from Google Patents.
US3879928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of yarn and the resulting product
Assignee: Perfect Thread Co Inc
•
Filing: 1973-11-01
•
Granted: 1975-04-29
•
Expires: 1993-11-01
Abstract
Abstract A process for manufacturing a balanced synthetic yarn, i.e., a yarn having relatively no torque, including the steps of conventionally texturizing yarn formed of thermoplastic filaments, subjecting the yarn to a subsequent heat treatment, and twisting the yarn with a relatively low twist in the opposite direction from the twist imparted to the yarn during the texturizing process.
Inventors
- 👤 Marvin Usdan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:47
CPC Classifications
D; D02; D02G; D02G1/00; D02G1/02; D02G1/0206; Y; Y10; Y10S; Y10S57/00; Y10S57/901
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
70 words
A PROCESS FOR THE PREPARATION OF LOW-TORQUE TEXTILE YARN COMPRISING, IMPARTING A HIGH TWIS TO A THERMOPLASTIC YARN IN ONE DIRECTION, HEAT-SETTING THE YARN IN THE HIGH TWIST CONDITION, DETWISTING THE YARN SO THAT A TORQUE IN THE DIRECTION OPPOSITE TO SAID HIGH TWIST IS IMPARTED THERETO, APPLYING A SECOND HEATSETTING TO THE YARN, AND THEREAFTER IMPARTING A LOW TWIST IN THE SAME DIRECTION AS SAID TORQUE TO THE YARN.
Claim 2
Dependent Claim
70 words
A PROCESS FOR THE PREPARATION OF LOW-TORQUE TEXTILE YARN COMPRISING, IMPARTING A HIGH TWIS TO A THERMOPLASTIC YARN IN ONE DIRECTION, HEAT-SETTING THE YARN IN THE HIGH TWIST CONDITION, DETWISTING THE YARN SO THAT A TORQUE IN THE DIRECTION OPPOSITE TO SAID HIGH TWIST IS IMPARTED THERETO, APPLYING A SECOND HEATSETTING TO THE YARN, AND THEREAFTER IMPARTING A LOW TWIST IN THE SAME DIRECTION AS SAID TORQUE TO THE YARN.
Claim 3
Dependent Claim
25 words
A process as recited in claim 1 wherein said low twist is of the order of about 100 to 200 turns per meter of yarn.
Claim 4
Dependent Claim
36 words
A process as recited in claim 1 wherein said second heat-setting is accomplished at a temperature of the order of about 200* to 300*C for a time of the order of about 1/4 to 1 hour.
Claim 5
Dependent Claim
38 words
A process as recited in claim 1 wherein said second heat-setting includes a series of steps including the steps of heating under pressure, exposing the yarn to the ambient atmosphere, and subjecting the yarn to a vacuum atmosphere.
Claim 6
Dependent Claim
30 words
A process as recited in claim 1 further including the step of applying an anti-static silicone oil solution to said yarn subsequent to imparting the low twist to the yarn.
Claim 7
Dependent Claim
32 words
A process as recited in claim 5 wherein said yarn is coated with said silicone-oil solution so that the weight of the finished yarn comprises 7 to 9 percent of said silicone-oil.
Claim 8
Dependent Claim
103 words
A process as recited in claim 1 wherein said second heat-setting includes the steps of steaming for about 4 minutes at about 250*C, exposing the yarn to the ambient atmosphere for about 2 minutes, steaming for about 5 minutes at about 250*C, exposing the yarn to the ambient atmosphere for about 2 minutes, subjecting the yarn to a vacuum for about 5 minutes, exposing the yarn to the ambient atmosphere for about 1 minute, steaming for about 25 minutes at about 250*C, exposing the yarn to the ambient atmosphere for about 1 minute and subjecting the yarn to vacuum for about 5 minutes.
Claim 9
Dependent Claim
21 words
A process as recited in claim 1 wherein said low twist is of the order of about 150 turns per meter.
Claim 10
Dependent Claim
12 words
A synthetic thermoplastic yarn manufactured according to the process of claim 1.
References Cited (Backward Citations)
US3098348A
Cited
US3316705A
Cited
US3462933A
Cited
US3157982A
Cited
US3399524A
Cited
US3582445A
Cited
US3522700A
Cited
US3696078A
Cited
US3733801A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-28 | 1978-10-28 | 1979-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-28 | 1982-10-28 | 1983-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-28 | 1986-10-28 | 1987-04-29 | $7700.00 | Window Closed / Lapsed |