US3832868A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Warp knitting machine
Assignee: Schlathorst W & Co
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Filing: 1972-11-13
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Granted: 1974-09-03
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Expires: 1992-11-13
Abstract
Abstract In a warp knitting machine, pneumatically operated means is provided for inserting weft thread in the material being knitted. The pneumatically operated means includes an elongated slotted tube in which a projectile is pneumatically propelled back and forth within the tube. The projectile has an arm passing through the slot in the tube and carrying operable means externally of the tube for pulling weft threads from a stationary supply reel. The weft threads are inserted in the material being knitted and suitable control means are provided for controlling the operation of the pneumatically operated means and the insertion of the weft threads.
Inventors
- 👤 J Derich
- 👤 H Kamp
- 👤 G Frehn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:41
CPC Classifications
D; D04; D04B; D04B23/00; D04B23/12
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
87 words
In a warp knitting machine for knitting a web of material, a stationary supply reel for weft threads to be inserted in the material being knitted, a tube extending alongside the space wherein the web of material is being knitted, a projectile disposed in and pneumatically operable within said tube, said tube having a longitudinally extending slot, and projecting means carried by said projectile and projecting through said slot for pulling the weft threads from said stationary supply reel for insertion thereof in the material being knitted.
Claim 2
Dependent Claim
87 words
In a warp knitting machine for knitting a web of material, a stationary supply reel for weft threads to be inserted in the material being knitted, a tube extending alongside the space wherein the web of material is being knitted, a projectile disposed in and pneumatically operable within said tube, said tube having a longitudinally extending slot, and projecting means carried by said projectile and projecting through said slot for pulling the weft threads from said stationary supply reel for insertion thereof in the material being knitted.
Claim 3
Dependent Claim
41 words
In a warp knitting machine according to claim 1, a plurality of said tubes, means mounting said tubes in a circular disposition about a central axis, and a central air supply conduit having a longitudinal axis coincident with said central axis.
Claim 4
Dependent Claim
47 words
In a warp knitting machine according to claim 2, means mounting said central air supply conduit against rotation, said conduit being formed with a plurality of openings, and passageway means providing selective communication between said air supply conduit and said tubes through said openings in said conduit.
Claim 5
Dependent Claim
34 words
In a warp knitting machine according to claim 1, said projecting means comprising an extension arm projecting through said longitudinal slot of said tube, and thread holders on said arm externally of said tube.
Claim 6
Dependent Claim
33 words
In a warp knitting machine according to claim 4, a resilient sealing means dIsposed along said longitudinal slot for sealing the latter as said extension arm moves back and forth along said slot.
Claim 7
Dependent Claim
16 words
In a warp knitting machine according to claim 5, said sealing means comprising an elastic strip.
Claim 8
Dependent Claim
27 words
In a warp knitting machine according to claim 1, evacuating means disposed between the longitudinal ends of said tube through which air is evacuated from said tube.
Claim 9
Dependent Claim
47 words
In a warp knitting machine according to claim 7, one evacuating means being disposed at about two-thirds of the longitudinal distance from one end of said tube and another evacuating means being disposed at about two-thirds of the longitudinal distance from the other end of said tube.
Claim 10
Dependent Claim
20 words
In a warp knitting machine according to claim 1, shutter elements pivotally mounted at the longitudinal ends of said tube.
Claim 11
Dependent Claim
63 words
In a warp knitting machine according to claim 4, thread insertion means disposed on both sides of said web of material, and thread laying means mounted on said extension arm externally of said tube, said thread laying means comprising sliding elements engagement and leading said weft threads back and forth for transferring said weft threads in loop form to said thread insertion means.
Claim 12
Dependent Claim
49 words
In a warp knitting machine according to claim 10, knitting needles, weft thread storage means disposed between said knitting needles and said tube, said weft thread storage means comprising storage discs provided with holding elements, said thread insertion means being pivotally mounted in operable association with said storage discs.
Claim 13
Dependent Claim
39 words
In a warp knitting machine according to claim 11, said weft thread storage means further comprising pressure roller means operatively associated with said holding elements of said storage discs for holding said weft thread loops on said storage discs.
Claim 14
Dependent Claim
57 words
In a warp knitting machine according to claim 10, said thread insertion means being driven synchronously with said knitting machine, and actuating means engageable by said projectile when the latter reaches the end portion of its path of travel in said tube, said actuating means being operably connected to said thread insertion means for operating the latter.
Claim 15
Dependent Claim
25 words
In a warp knitting machine according to claim 1, said tube being stationary, and valve means being provided for controlling the air in said tube.
Claim 16
Dependent Claim
37 words
In a warp knitting machine according to claim 14, a stationary air supply conduit disposed parallel to said tube, said valve means being operable to control the air flow between said air supply conduit and said tube.
Claim 17
Dependent Claim
34 words
In a warp knitting machine according to claim 14, said valve means comprising a stationary part and a rotary part, and means operating said rotary part cyclically with the operation of said knitting machine.
Claim 18
Dependent Claim
43 words
In a warp knitting machine according to claim 10, a stationary thread guiding element disposed centrally between the longitudinal ends of said tube, said weft threads being fed to said sliding elements of said thread laying means by said stationary thread guiding element.
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) | 1977-09-02 | 1978-03-04 | 1978-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-02 | 1982-03-04 | 1982-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-02 | 1986-03-04 | 1986-09-03 | $7700.00 | Window Closed / Lapsed |