US3742973A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Guiding comb tooth for air jet looms
Assignee: VYZK D VYVOJOVY USTAV Z VSEOBE
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Filing: 1972-02-08
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Granted: 1973-07-03
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Expires: 1992-02-08
Abstract
Abstract A guiding comb tooth for air jet weaving looms, the body of which comb tooth forks into a straight part and an arcuate part, such parts together forming a substantially circular picking aperture for the weft thread and leaving an exit slot for the weft thread from the picking aperture; the exit slot is closed at its entrance by flat spring means fixed on the arcuate part of the comb tooth and leaning against the internal wall of the straight part of this comb tooth.
Inventors
- 👤 K Kakac
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:44
CPC Classifications
D; D03; D03D; D03D49/00; D03D49/60; D03D49/62; D03D47/00; D03D47/27; D03D47/277; D03D47/278
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
195 words
A guiding comb tooth for air jet looms, said tooth being adapted to guide a weft thread picked by a stream of pressure air through the open shed of a loom, the shed being formed by an upper system of warp threads and a lower system of warp threads, said guiding comb being adapted to be mounted in said loom in a position determined by a first extreme position beyond the shed, and by a second extreme position within an open shed, said guiding comb comprising a body forking into a substantially straight part and an arcuate part, the outer free ends of the straight and arcuate parts approaching each other but leaving an exit slot for the weft thread between them, said straight and arcuate parts together forming a substantially circular picking aperture below said exit slot for picking through the weft thread, deformable flat spring means provided on said arcuate part in front of the exit slot, the outer end of said flat spring means leaning against the internal wall of the substantially straight part of the guiding comb tooth and thus, when undeformed, closing completely the exit slot of the picking aperture.
Claim 2
Dependent Claim
195 words
A guiding comb tooth for air jet looms, said tooth being adapted to guide a weft thread picked by a stream of pressure air through the open shed of a loom, the shed being formed by an upper system of warp threads and a lower system of warp threads, said guiding comb being adapted to be mounted in said loom in a position determined by a first extreme position beyond the shed, and by a second extreme position within an open shed, said guiding comb comprising a body forking into a substantially straight part and an arcuate part, the outer free ends of the straight and arcuate parts approaching each other but leaving an exit slot for the weft thread between them, said straight and arcuate parts together forming a substantially circular picking aperture below said exit slot for picking through the weft thread, deformable flat spring means provided on said arcuate part in front of the exit slot, the outer end of said flat spring means leaning against the internal wall of the substantially straight part of the guiding comb tooth and thus, when undeformed, closing completely the exit slot of the picking aperture.
Claim 3
Dependent Claim
63 words
A guiding comb tooth as set forth in claim 1, wherein said flat spring means, in said second extreme position of the guiding comb tooth within the open shed, is deformed so that it is inclined, the degree of its inclination with respect to the horizontal corresponding to the inclination from the horizontal of the upper system of warp threads forming the shed.
Claim 4
Dependent Claim
31 words
A guiding comb tooth as set forth in claim 1, wherein the width of said flat spring means is at a maximum equal to the width of the guiding comb tooth.
Claim 5
Dependent Claim
24 words
A guiding comb tooth as set forth in claim 1, wherein the comb tooth with said flat spring means is made in one piece.
Claim 6
Dependent Claim
19 words
A guiding comb tooth as set forth in claim 4, wherein the one-piece tooth is molded of plastic material.
Claim 7
Dependent Claim
21 words
A guiding comb tooth as set forth in claim 1, wherein the picking aperture through the tooth is of frusto-conical shape.
Claim 8
Dependent Claim
35 words
A guiding comb tooth as set forth in claim 6, wherein the tooth has a plate-like body, and the axis of the frusto-conical picking aperture therethrough is disposed normal to the plane of the body.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-02 | 1977-01-01 | 1977-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-02 | 1981-01-01 | 1981-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-02 | 1985-01-01 | 1985-07-03 | $7700.00 | Window Closed / Lapsed |