US3640094A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for cutting and gripping threads in circular knitting machines and the like
Assignee: Mecmor SpA
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Filing: 1969-05-06
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Granted: 1972-02-08
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Expires: 1989-05-06
Abstract
Abstract This disclosure relates to a device for cutting and gripping threads in circular knitting machines of the type with a fixed needle cylinder and a fixed needle dial arranged thereon and rotating thread guide units, said device comprising a shears unit including a cam-actuated mobile blade which extends radially to said needle dial and a counterblade which extends tangentially to the needle dial; resilient means being provided for permitting slight adaption movements of said counterblade tangentially to said needle dial.
Inventors
- 👤 Francesco Piana
- 👤 Angelo Brega
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:12
CPC Classifications
D; D04; D04B; D04B15/00; D04B15/38; D04B15/54; D04B15/58; D04B15/60; D04B15/61
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
331 words
In a circular knitting machine having a fixed needle cylinder and a fixed needle dial arranged thereon and a rotating unit holding the thread guides for manufacturing open tubular fabric having two selvedges, a device for cutting and gripping threads to form said selvedges, comprising radial grooves in said needle dial distributed over a sector of said dial, stemlike pincer means for the threads slidably mounted in said grooves, threadbraking means arranged on said needle dial, cutting means having a barlike member slidable in one of said radial grooves and a counterblade member arranged tangentially to said barlike member, resilient means urging said counterblade member against said barlike member, cam means provided on the surface of said rotating unit facing said needle dial and control means cooperating With said cam means to control said stemlike pincer means and said cutting and thread-braking means, wherein, according to the improvement, said thread-braking means comprise a first rod member fixed in one of said radial grooves and having a hooked end projecting outside said fixed needle dial for engaging the thread and a second rod member arranged slidably in a groove adjacent the groove in which said first rod member is arranged and having a hooked projecting end and a narrowed seat near the opposite end thereof, wherein said barlike member of said cutting means has a cutting surface at the external end cooperating with said counterblade member and a narrowed seat near the opposite end thereof and wherein said control means cooperating with said cam means to control said cutting and thread-braking means comprise s sticklike member slidable inside one of said grooves and having a narrowed seat near its internal end and a butt formation cooperating with said cam means, a plate member engaging said narrowed seat of said barlike member, said sticklike member and said second rod member, respectively, thereby to cause rigid simultaneous radial movement of said thread-braking means and said cutting rodlike member in cooperation with said control means.
Claim 2
Dependent Claim
331 words
In a circular knitting machine having a fixed needle cylinder and a fixed needle dial arranged thereon and a rotating unit holding the thread guides for manufacturing open tubular fabric having two selvedges, a device for cutting and gripping threads to form said selvedges, comprising radial grooves in said needle dial distributed over a sector of said dial, stemlike pincer means for the threads slidably mounted in said grooves, threadbraking means arranged on said needle dial, cutting means having a barlike member slidable in one of said radial grooves and a counterblade member arranged tangentially to said barlike member, resilient means urging said counterblade member against said barlike member, cam means provided on the surface of said rotating unit facing said needle dial and control means cooperating With said cam means to control said stemlike pincer means and said cutting and thread-braking means, wherein, according to the improvement, said thread-braking means comprise a first rod member fixed in one of said radial grooves and having a hooked end projecting outside said fixed needle dial for engaging the thread and a second rod member arranged slidably in a groove adjacent the groove in which said first rod member is arranged and having a hooked projecting end and a narrowed seat near the opposite end thereof, wherein said barlike member of said cutting means has a cutting surface at the external end cooperating with said counterblade member and a narrowed seat near the opposite end thereof and wherein said control means cooperating with said cam means to control said cutting and thread-braking means comprise s sticklike member slidable inside one of said grooves and having a narrowed seat near its internal end and a butt formation cooperating with said cam means, a plate member engaging said narrowed seat of said barlike member, said sticklike member and said second rod member, respectively, thereby to cause rigid simultaneous radial movement of said thread-braking means and said cutting rodlike member in cooperation with said control means.
Claim 3
Dependent Claim
104 words
A device according to claim 1, wherein said cutting means for cutting the thread to form the selvedges of the open tubular fabric further comprise a blocklike member rigid with said fixed needle dial, a guide in said blocklike element extending substantially in a direction tangential to said fixed needle dial, a peg member slidable inside said guide, said counterblade member mounted on said peg member said resilient means comprising a spring member on said blocklike member urging said peg member inside said guide in the direction of said barlike member of said cutting means, thereby to approach said counterblade to said barlike member.
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) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |