US4134434A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Weft cutting device in looms with mechanisms for multi weft weaving
Assignee: Vyzkumny a Vyvojovy Ustav Zavodu Vseobecneho Strojirenstvi
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Filing: 1977-12-19
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Granted: 1979-01-16
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Expires: 1997-12-19
Abstract
Abstract There is disclosed a device for cutting weft in looms with mechanisms for multi-weft weaving. The cutting device includes a holder on which mutually adjustable shields are mounted. The shields are provided with entrapping dents for the introduction and location of weft between the blades of cutting jaws at a cutting point. The cutting device has a movable jaw which is adjustably connected to a control lever. Adjustable shields and cutting jaws permit the use of the entire length of knife blades secured to the jaws. In this manner, during cutting the overlap is minimized and the lifetimes of the cutting edges and the cutting jaws are increased.
Inventors
- 👤 Jaromir Malasek
- 👤 Vladimir Kuda
- 👤 Vojmir Pozar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:23
CPC Classifications
D; D03; D03D; D03D49/00; D03D49/70
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
215 words
In a device for cutting wefts in a loom which weaves a fabric in a weaving plane, the loom having a driving means, a frame, and means for inserting wefts, said cutting device having a body which is fixedly positioned on the frame of the loom, said cutting device including a cutting mechanism having relatively movable opposed elongated blades of which at least one is driven by the driving means, said blades extending transverse to the weaving plane of the loom, the improvement which comprises mechanism driven by the driving means, means for adjustably connecting at least one of the cutting blades of the cutting mechanism to the driven mechanism, whereby selectively to adjust the position of the cutting point relative to the length of the opposed cutting blades, cutting shields mounted on the body of the device and extending in a plane parallel to the plane of the cutting blades to receive and guide the weft so as to position it between the cutting edges of the cutting blades, each of the shields having a dent therein, said dents confronting each other and entrapping the weft at the cutting point, and means for adjusting the shields so as to position the confronting dents thereof in alignment with the cutting point of the cutting blades.
Claim 2
Dependent Claim
215 words
In a device for cutting wefts in a loom which weaves a fabric in a weaving plane, the loom having a driving means, a frame, and means for inserting wefts, said cutting device having a body which is fixedly positioned on the frame of the loom, said cutting device including a cutting mechanism having relatively movable opposed elongated blades of which at least one is driven by the driving means, said blades extending transverse to the weaving plane of the loom, the improvement which comprises mechanism driven by the driving means, means for adjustably connecting at least one of the cutting blades of the cutting mechanism to the driven mechanism, whereby selectively to adjust the position of the cutting point relative to the length of the opposed cutting blades, cutting shields mounted on the body of the device and extending in a plane parallel to the plane of the cutting blades to receive and guide the weft so as to position it between the cutting edges of the cutting blades, each of the shields having a dent therein, said dents confronting each other and entrapping the weft at the cutting point, and means for adjusting the shields so as to position the confronting dents thereof in alignment with the cutting point of the cutting blades.
Claim 3
Dependent Claim
51 words
A device as claimed in claim 1, wherein one of the cutting blades is fixed, and wherein the means for connecting the other, movable blade to the driven mechanism of the loom is adjustable so as to adjust the position of the cutting point along the lengths of the cutting blades.
Claim 4
Dependent Claim
35 words
A device as claimed in claim 2, wherein the means for connecting the movable blade of the cutting mechanism to the driven mechanism includes a link, and means for adjusting the length of the link.
Claim 5
Dependent Claim
79 words
A device as claimed in claim 2, wherein the means for connecting the movable blade of the cutting mechanism to the driven mechanism includes a lever pivotally connected to said link, a fixed pivot means for the lever, the movable blade of the cutting mechanism oscillating about said pivot means, and means drivingly connecting the lever and the movable blade, said last named means being adjustable whereby to adjust the angular relationship between the lever and the movable blade.
Claim 6
Dependent Claim
45 words
A device as claimed in claim 1, comprising means for adjustably securing the opposed shields together, and wherein the means for adjusting the connected shields relative to the cutting point adjusts the connected shields in the direction perpendicular to the weaving plane of the loom.
Claim 7
Dependent Claim
28 words
A device as claimed in claim 5, wherein the means for adjusting the connected shields comprises means mounting one of the shields on the body of the device.
Claim 8
Dependent Claim
44 words
A device as claimed in claim 6, comprising means for slidingly adjustably connecting said one of the shields to the body of the device, said connecting means also permitting adjustment of the connected shields angularly with respect to the weaving plane of the loom.
Claim 9
Dependent Claim
49 words
A device as claimed in claim 1, comprising means for adjusting the body of the cutting mechanism, upon which the cutting blades and the shields are mounted, in a direction parallel to the weaving plane of the loom and toward and away from the path of weft insertion thereof.
Claim 10
Dependent Claim
24 words
A device as claimed in claim 1, wherein the loom weaves with a plurality of wefts, and has means selectively to insert said wefts.
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) | 1982-01-15 | 1982-07-17 | 1983-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-15 | 1986-07-17 | 1987-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-15 | 1990-07-17 | 1991-01-16 | $7700.00 | Window Closed / Lapsed |