Textiles: weaving – Weft manipulation – Weaving with stationary weft supply
Patent
1990-10-17
1992-09-08
Falik, Andrew M.
Textiles: weaving
Weft manipulation
Weaving with stationary weft supply
1394351, 1394354, 139194, 226 97, D03D 4734
Patent
active
051449870
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a device for drawing a weft yarn into a loom.
In most looms, the weft yarn is guided in a device for drawing-in the weft yarn at least in parts in a duct as, for instance, inside a weft accumulator having a stationary drum on which turns of weft yarn are deposited in the zone between the entry eye and the winding zone on the drum.
In air jet looms, the weft yarn is drawn into the loom at least in parts by means of compressed air while in gripper looms weft yarn is conventionally drawn in manually from the feed bobbin as far as a picking element, to some extent with the use of mechanical means.
Accordingly, it is an object of the invention to simplify the drawing-in of a weft yarn in a loom.
It is another object of the invention to provide a facility for automatically drawing in a weft yarn in a loom.
Briefly, the invention provides a device for drawing a weft yarn into a loom which includes at least one pair of tubular members disposed in coaxially spaced relation for guiding an air-entrained weft yarn therethrough with each tubular member having a longitudinally extending slot to permit lateral deflection of a weft yarn from a respective member. In addition, the device includes means for deflecting a weft yarn laterally from the tubular members.
In one embodiment, the deflecting means is in the form of a yarn brake having a braking plate spaced laterally of the tubular members and a braking finger for deflecting a weft yarn from the tubular members and being movable between a position spaced from the plate and a position engaging the plate.
In another embodiment, the means for deflecting the yarn may be in the form of a yarn tensioner which is movable between a position axially aligned with the tubular members to receive a yarn and a position spaced laterally of the tubular members to deflect the yarn from the tubular members.
The device may also include a pair of yarn deflecting stations each of which has a respective tubular member extending therefrom and which are spaced apart for deflection of a weft yarn between the stations. Also, means for supplying compressed air to each station may be provided for conveying a weft yarn therethrough.
The effect of the device is that a weft yarn can be drawn off a supply bobbin rapidly and guided without any manually guided tool for presentation to a picking element of a loom.
These and other objects and advantages of the invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings wherein:
FIG. 1 is a perspective overview of part of the device for drawing weft yarns into a loom for four weft colors from the supply bobbin to the yarn brake;
FIG. 1a shows a continuation of the device from the weft yarn stop motion immediately after the yarn brake as far as the weft guide duct or tunnel in the loom;
FIG. 2 is a diagrammatic view of the situation in FIGS. 1 and 1a;
FIG. 3 shows a cross-sectional view of an injector nozzle;
FIG. 4 shows the end of the guide duct before the entry into the shed of the loom;
FIGS. 5 and 6 are a view in elevation and section respectively of a yarn-guiding element;
FIGS. 7 and 8 show an elevational view and a section of another embodiment of the yarn-guiding element;
FIG. 9 is a perspective view showing the yarn tensioner and drive and the yarn guide near the yarn tensioner;
FIG. 10 is a similar view of the yarn brake;
FIG. 11 shows a side view of another embodiment of the yarn tensioner;
FIG. 12 illustrates a cross sectional view of a modified device employing pairs of tubular members in cooperation with a yarn tensioner;
FIG. 12b illustrates a part cross sectional plan view of the block of FIG. 12;
FIG. 12c illustrates a cross sectional view of the block of FIG. 12;
FIG. 13a illustrates a perspective view of a modified yarn-guiding element adjacent to a shed in accordance with the invention; and
FIG. 13b illustrates a view of the yarn-guiding element of FIG. 13a in a deflected position in accordance with the invention.
Referring to FIG. 1, a weft y
REFERENCES:
patent: 2925833 (1960-02-01), Strake
patent: 4197882 (1980-04-01), Ohnishi
patent: 4366845 (1983-01-01), Simson
patent: 4637229 (1987-01-01), Taylor, Jr.
patent: 4730645 (1988-03-01), Baird et al.
patent: 4756341 (1988-07-01), Takehana
patent: 4838321 (1989-06-01), Ishido et al.
patent: 4926911 (1990-03-01), Shaw
Burer Franz
Gehrig Hans-Jorg
Kaufmann Josef
Maurer Heinz
Muller Hanspeter
Falik Andrew M.
Sulzer Brothers Limited
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