US3901284A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Weft carrier for a shuttleless loom
Assignee: Saurer Diederichs SA
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Filing: 1974-01-04
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Granted: 1975-08-26
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Expires: 1994-01-04
Abstract
Abstract A shuttleless loom has a pair of weft carriers which reciprocate toward and away from each other from opposite sides of the shed to meet in the shed center and pass a weft filament from the feed carrier to the pickup carrier. Each carrier telescopes in a guide outside the shed which is provided with an actuating formation which serves to move a gripper element away from a retaining surface against the force of a spring. A latch pawl is provided in each carrier to hold the element away from the surface so long as the carrier is outside the shed in order to allow the feed carrier to grip a new weft filament and to allow the pickup carrier to release the thread it has drawn through the shed. The retaining surface of the feed carrier is spring-biased to pivot away from the clamping element when released, and the retaining surface of the pickup carrier grips the thread with a flap pressed by the clamping element against this surface.
Inventors
- 👤 Christian Riolet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:22
CPC Classifications
D; D03; D03D; D03D47/00; D03D47/12; D03D47/20; D03D47/23; D03D47/233; D03D47/236
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
128 words
A weft carrier for inserting a weft in a shed of a shuttleless loom having a tubular carrier guide outside said shed operatively engageable with said carrier and provided with an actuation formation, said carrier comprising: a support telescopingly displaceable in said tubular guide into and out of said shed and having a retaining surface; a gripping element pivoted on said support and engageable with said surface for pinching a weft thread against said surface; a spring between said support and said element biasing said element against said surface; and actuation means wholly carried in said support connected to said element and engageable with said formation for pivoting said element against said spring away from said surface on displacement of said support to the end of said shed.
Claim 2
Dependent Claim
128 words
A weft carrier for inserting a weft in a shed of a shuttleless loom having a tubular carrier guide outside said shed operatively engageable with said carrier and provided with an actuation formation, said carrier comprising: a support telescopingly displaceable in said tubular guide into and out of said shed and having a retaining surface; a gripping element pivoted on said support and engageable with said surface for pinching a weft thread against said surface; a spring between said support and said element biasing said element against said surface; and actuation means wholly carried in said support connected to said element and engageable with said formation for pivoting said element against said spring away from said surface on displacement of said support to the end of said shed.
Claim 3
Dependent Claim
28 words
The carrier defined in claim 1 wherein said formation is a camming ramp and said actuation means includes a roller on said element and engageable with said ramp.
Claim 4
Dependent Claim
42 words
The carrier defined in claim 2, further comprising means on said support for locking said gripping element in an open position spaced from said surface on displacement of said support from said shed with said actuation means in engagement with said formation.
Claim 5
Dependent Claim
22 words
The carrier defined in claim 3 wherein the locking means includes a pivotal pawl engageable with said formation and with said element.
Claim 6
Dependent Claim
23 words
The carrier defined in claim 4 wherein said pawl is formed with a cutout, said element having an end engageable in said cutout.
Claim 7
Dependent Claim
32 words
The carrier defined in claim 1 wherein said support is provided with a displaceable flap engageable with said surface, said element being engageable with said flap to press same against said surface.
Claim 8
Dependent Claim
16 words
The carrier defined in claim 1 wherein said support comprises a housing of generally rectangular section.
Claim 9
Dependent Claim
157 words
A weft carrier for inserting a weft in a shed of a shuttleless loom having a carrier guide outside said shed operatively engageable with said carrier and provided with an actuation formation, said carrier comprising: a support displaceable on said guide into and out of said shed and having a retaining surface; a gripping element pivoted on said support and engageable with said surface for pinching a weft thread against said surface, said formation being a camming ramp; a spring between said support and said element biasing said element against said surface; actuation means on said support connected to said element and including a roller engageable with said formation for pivoting said element against said spring away from said surface on displacement of said support to the end of said shed, said formation being at least one tooth and said actuation means including a pivotal pawl at least partially formed as a sector meshable with said tooth.
Claim 10
Dependent Claim
157 words
A weft carrier for inserting a weft in a shed of a shuttleless loom having a carrier guide outside said shed operatively engageable with said carrier and provided with an actuation formation, said carrier comprising: a support displaceable on said guide into and out of said shed and having a retaining surface; a gripping element pivoted on said support and engageable with said surface for pinching a weft thread against said surface, said formation being a camming ramp; a spring between said support and said element biasing said element against said surface; actuation means on said support connected to said element and including a roller engageable with said formation for pivoting said element against said spring away from said surface on displacement of said support to the end of said shed, said formation being at least one tooth and said actuation means including a pivotal pawl at least partially formed as a sector meshable with said tooth.
Claim 11
Dependent Claim
221 words
A weft carrier for inserting a weft in a shed of a shuttleless loom having a carrier guide outside said shed operatively engageable with said carrier and provided with an actuation formation, said carrier comprising: a support displaceable on said guide into and out of said shed and having a retaining surface, said formation being a camming ramp; a gripping element pivoted on sAid support and engageable with said surface for pinching a weft thread against said surface; a spring between said support and said element biasing said element against said surface; actuation means on said support and including a roller mounted on said element and engageable with said ramp for pivoting said element against said spring away from said surface on displacement of said support to the end of said shed; and means on said support including a pivotal pawl engageable with said ramp and with said element for locking said gripping element in an open position spaced from said surface on displacement of said support from said shed with said actuation means in engagement with said formation, said pawl being displaceable between a locking position securing said element in said open position and an unlocking position permitting pivoting of said element, said carrier further comprising resilient biasing means for releasably holding said pawl in said locking and unlocking positions.
Claim 12
Dependent Claim
221 words
A weft carrier for inserting a weft in a shed of a shuttleless loom having a carrier guide outside said shed operatively engageable with said carrier and provided with an actuation formation, said carrier comprising: a support displaceable on said guide into and out of said shed and having a retaining surface, said formation being a camming ramp; a gripping element pivoted on sAid support and engageable with said surface for pinching a weft thread against said surface; a spring between said support and said element biasing said element against said surface; actuation means on said support and including a roller mounted on said element and engageable with said ramp for pivoting said element against said spring away from said surface on displacement of said support to the end of said shed; and means on said support including a pivotal pawl engageable with said ramp and with said element for locking said gripping element in an open position spaced from said surface on displacement of said support from said shed with said actuation means in engagement with said formation, said pawl being displaceable between a locking position securing said element in said open position and an unlocking position permitting pivoting of said element, said carrier further comprising resilient biasing means for releasably holding said pawl in said locking and unlocking positions.
Claim 13
Dependent Claim
148 words
A weft carrier for inserting a weft in a shed of a shuttleless loom having a carrier guide outside said shed operatively engageable with said carrier and provided with an actuation formation, said carrier comprising: a support displaceable on said guide into and out of said shed and having a retaining surface; a gripping element pivoted on said support and engageable with said surface for pinching a weft thread against said surface; a spring between said support and said element biasing said element against said surface; actuation means on said support connected to said element and engageable with said formation for pivoting said element against said spring away from said surface on displacement of said support to the end of said shed, said support being provided with a pivotal abutment constituting said surface, said carrier further comprising spring means for resiliently biasing said abutment away from said element.
Claim 14
Dependent Claim
148 words
A weft carrier for inserting a weft in a shed of a shuttleless loom having a carrier guide outside said shed operatively engageable with said carrier and provided with an actuation formation, said carrier comprising: a support displaceable on said guide into and out of said shed and having a retaining surface; a gripping element pivoted on said support and engageable with said surface for pinching a weft thread against said surface; a spring between said support and said element biasing said element against said surface; actuation means on said support connected to said element and engageable with said formation for pivoting said element against said spring away from said surface on displacement of said support to the end of said shed, said support being provided with a pivotal abutment constituting said surface, said carrier further comprising spring means for resiliently biasing said abutment away from said 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) | 1978-08-25 | 1979-02-24 | 1979-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-25 | 1983-02-24 | 1983-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-25 | 1987-02-24 | 1987-08-26 | $7700.00 | Window Closed / Lapsed |