US3735608A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Yarn tensioning device for circular knitting machines and the like
Assignee: G Billi and C SpA
•
Filing: 1971-02-04
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Granted: 1973-05-29
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Expires: 1991-02-04
Abstract
Abstract Apparatus used with a circular knitting machine having a rotary needle cylinder to yeildingly tension the starting end of a yarn knit upon the needles of the machine, the apparatus comprising, a first radially movable hook to engage the yarn extending between a few needles temporarily anchoring the yarn and yarn guide feeding the yarn at a first knitting station, means to withdraw the first hook and the yarn through a tube disposed adjacent the needle circle, a second hook to engage the withdrawn yarn and to present it to a winding reel to be clamped therein and to be wound thereon as the yarn is released from the anchoring needles, then, as the yarn is knit by the needles, the winding reel, which is driven through a slip clutch coupling, exerts yielding tension upon the starting end of the yarn by slippage of the clutch and which also winds up and unwinds the starting end of the yarn as knitting proceeds around the revolving circle of needles. Upon completion of a stage of the knitting, the starting end of the yarn is anchored in the fabric by knitting the same upon a few needles at a second knitting station of the machine afterwhich the yarn is severed.
Inventors
- 👤 G Billi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:34
CPC Classifications
D; D04; D04B; D04B1/00; D04B1/22; D04B1/24; D04B1/26; D04B15/00; D04B15/38; D04B15/44; D04B9/00; D04B9/42; D04B9/46; D04B9/56
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
133 words
Apparatus for use with a circular knitting machine having a needle cylinder, a circle of needles in said cylinder, a yarn finger to feed yarn to said needles, said needles being operative to knit a fabric of circular courses of said yarn by rotary knitting with the starting end portion of said yarn extending from the first stitches of the first of said courses, said apparatus including a rotatable winding reel adjacent said needle cylinder upon which said starting portion of said yarn is wound, a slip clutch coupling operatively connected to said reel, and means to rotate said winding reel under the control of said coupling to exert yielding tension upon the span of yarn of said starting end portion of said yarn extending between said winding reel and said first stitches.
Claim 2
Dependent Claim
133 words
Apparatus for use with a circular knitting machine having a needle cylinder, a circle of needles in said cylinder, a yarn finger to feed yarn to said needles, said needles being operative to knit a fabric of circular courses of said yarn by rotary knitting with the starting end portion of said yarn extending from the first stitches of the first of said courses, said apparatus including a rotatable winding reel adjacent said needle cylinder upon which said starting portion of said yarn is wound, a slip clutch coupling operatively connected to said reel, and means to rotate said winding reel under the control of said coupling to exert yielding tension upon the span of yarn of said starting end portion of said yarn extending between said winding reel and said first stitches.
Claim 3
Dependent Claim
28 words
Apparatus as in claim 1 wherein said span of yarn is wound up upon and is unwound from said winding reel during each course of said rotary knitting.
Claim 4
Dependent Claim
78 words
Apparatus as in claim 3 wherein said starting end portion of said yarn is temporarily anchored by and extends as a float of yarn from a number of needles of said circle of needles to said yarn finger, wherein a yarn guide tube is disposed adjacent said circle of needles, and wherein said apparatus includes means to engage said float of yarn and to withdraw the same through said tube and into operative relation with said winding reel.
Claim 5
Dependent Claim
61 words
Apparatus as in claim 3 wherein said means to engage said span of yarn comprises a pair of hooks of which the first thereof engages and withdraws said span of yarn through said tube radially of said needle cylinder, and the other of said hooks engages said withdrawn yarn and moves the same laterally into operative relation with said winding reel.
Claim 6
Dependent Claim
28 words
Apparatus as in claim 4 wherein said winding reel is provided with a yarn clamp and wherein said yarn is positioned in said clamp by said other hook.
Claim 7
Dependent Claim
60 words
Apparatus as in claim 5 wherein said winding reel includes a rotatable driving disc having a plurality of spaced pins extending from one side thereof, and a driven disc rotarily coupled to said driving disc by said pins extending through said driven disc, wherein said discs provide said yarn clamp therebetween, and wherein said yarn is wound about said pins.
Claim 8
Dependent Claim
39 words
Apparatus as in claim 6 wherein said driven disc is movable toward and away from said driving disc, and wherein movement of said driven disc away from said driving disc acts to discharge said wound yarn from said pins.
Claim 9
Dependent Claim
28 words
Apparatus as in claim 2 wherein said span of yarn is knit upon a number of needles of said circle of needles upon the completion of said fabric.
Claim 10
Dependent Claim
48 words
Apparatus as in claim 8 wherein said machine is provided with a pair of knitting stations, wherein said yarn finger is located at one of said knitting stations, and wherein said span of yarn is knit upon said number of needles at the other of said knitting stations.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-28 | 1976-11-27 | 1977-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-28 | 1980-11-27 | 1981-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-28 | 1984-11-27 | 1985-05-29 | $7700.00 | Window Closed / Lapsed |