US3848641A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Weft inserter for travelling-wave shedding looms
Assignee: Vyzkumny Ustav Bavlnarsky AS
•
Filing: 1973-06-04
•
Granted: 1974-11-19
•
Expires: 1993-06-04
Abstract
Abstract A weft inserter for travelling-wave shedding looms, said inserter having a body with a leading point, a recess adapted to receive a rotary bobbin, a roller cooperating with a driving roller on a chain conveyor, with a recess for a carrier on said chain conveyor, and a weft outlet brake. A planar base wall of the weft inserter includes an angle not exceeding 45* with a planar front wall thereof, which front wall merges via an arcuate recess into a wall merging in turn into a rear wall of said inserter. The rear wall forms a right angle with said base wall, while in the middle of said rear wall there is provided a notch for said thread outlet brake and a guide for weft thread. The notch extends through said wall towards a slot connecting said arcuate recess with said recess for the rotary bobbin and directed towards the rotational axis of said bobbin rotatably supported on a projection in the bottom of said recess, said weft inserter, when viewed at from said point, being widened by its convex surfaces merging into a top guide face and into a bottom guide face symmetrical with the latter along a middle plane of the inserter, which guide faces are provided, along said base wall, with an upper relieving surface and a lower relieving surface symmetrical with the latter along said middle plane, while in the region where said front wall ceases and merges into said arcuate recess, said front wall is continued as an upper thread separating spring bent in parallel with said base wall, said roller being arranged in the space between said point and said bobbin.
Inventors
- 👤 Z Kramenic
- 👤 O Chronek
- 👤 Z Zabrodsky
- 👤 F Augusta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:10
CPC Classifications
D; D03; D03J; D03J5/00; D03J5/06; D03J5/065
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
301 words
In a weft inserter for travelling-wave shedding looms, having an inserter body with a leading point, a recess adapted to receive a rotary bobbin, a roller co-operating with a driving roller on a chain conveyor and with a recess for a carrier on said chain conveyor, and a weft outlet brake, the improvement which comprises a planar base wall of the weft inserter including an angle ( Alpha ) not exceeding 45* with a planar front wall thereof, said front wall merging via an arcuate recess into a wall merging in turn into a rear wall of said inserter, the rear wall forming a right angle with said base wall, in the middle of said rear wall there being provided a notch for said thread outlet brake and a guide for weft thread, said notch extending through said wall towards a slot connecting said arcuate recess with said recess for the rotary bobbin and directed towards the rotational axis of said bobbin rotatably supported on a projection in the bottom of said recess, said weft inserter, when viewed from said point, being widened by its convex surfaces merging into a top guide face and into a bottom guide face symmetrical with the latter along a middle plane of the inserter, said guide faces being provided, along said base wall, with an upper relieving surface and a lower relieving surface symmetrical with the latter along said middle plane, while the region where said front wall ceases and merges into said arcuate recess, said front wall is continued, on the one hand, as an upper thread separating spring overlapping said slot and, on the other hand, as a lower thread separating spring bent to lie parallel with said base wall said roller being arranged in the space between said point and said bobbin.
Claim 2
Dependent Claim
301 words
In a weft inserter for travelling-wave shedding looms, having an inserter body with a leading point, a recess adapted to receive a rotary bobbin, a roller co-operating with a driving roller on a chain conveyor and with a recess for a carrier on said chain conveyor, and a weft outlet brake, the improvement which comprises a planar base wall of the weft inserter including an angle ( Alpha ) not exceeding 45* with a planar front wall thereof, said front wall merging via an arcuate recess into a wall merging in turn into a rear wall of said inserter, the rear wall forming a right angle with said base wall, in the middle of said rear wall there being provided a notch for said thread outlet brake and a guide for weft thread, said notch extending through said wall towards a slot connecting said arcuate recess with said recess for the rotary bobbin and directed towards the rotational axis of said bobbin rotatably supported on a projection in the bottom of said recess, said weft inserter, when viewed from said point, being widened by its convex surfaces merging into a top guide face and into a bottom guide face symmetrical with the latter along a middle plane of the inserter, said guide faces being provided, along said base wall, with an upper relieving surface and a lower relieving surface symmetrical with the latter along said middle plane, while the region where said front wall ceases and merges into said arcuate recess, said front wall is continued, on the one hand, as an upper thread separating spring overlapping said slot and, on the other hand, as a lower thread separating spring bent to lie parallel with said base wall said roller being arranged in the space between said point and said bobbin.
Claim 3
Dependent Claim
24 words
Weft inserter as claimed in claim 1, wherein from said lower relieving surface a recess extends into said projection for receiving a carrying member.
Claim 4
Dependent Claim
21 words
Weft inserter as claimed in claim 1, wherein a controlling member of said weft outlet brake is arranged in said notch.
Claim 5
Dependent Claim
24 words
Weft inserter as claimed in claim 3, wherein said controlling member is a yoke supported for reciprocation on jaws of said weft outlet brake.
Claim 6
Dependent Claim
23 words
Weft inserter as claimed in claim 4, wherein said yoke is a gripper, which resiliently clamps said jaws of said weft outlet brake.
Claim 7
Dependent Claim
45 words
Weft inserter as claimed in claim 4, wherein said yoke is provided, at least on one of its inner walls bearing against said jaws oF said weft outlet brake, with an elastic element so as to resiliently clamp said jaws of said weft outlet brake.
Claim 8
Dependent Claim
23 words
Weft inserter as claimed in claim 1, wherein said roller is of a conical configuration narrowing towards said front wall of the inserter.
Claim 9
Dependent Claim
70 words
Weft inserter as claimed in claim 1, wherein a wall of said recess for said bobbin adjacent said point there is provided an additional arcuate cavity of which the bottom is aligned with the bottom base of said bobbin and includes an acute angle with the slanted lateral cavity wall intersecting a wall of said recess for said bobbin substantially within the level of the top base of said bobbin.
Claim 10
Dependent Claim
46 words
Weft inserter as claimed in claim 1, wherein said bobbin is locked by a lid to which a strap plate is fixedly attached relative to said projection, said strap plate having a slot, said slot in said wall, and the center of rotation of said bobbin.
Claim 11
Dependent Claim
58 words
Weft inserter as claimed in claim 1, wherein said recess for said bobbin has a cylindrical shape of which the lateral wall merges, at the side opposite the slot into two walls forming right angles with each other, one of which is parallel with said base wall and the other of which is parallel with said rear wall.
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) | 1977-11-18 | 1978-05-20 | 1978-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-18 | 1982-05-20 | 1982-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-18 | 1986-05-20 | 1986-11-19 | $7700.00 | Window Closed / Lapsed |