Shed holder element for the weaving rotor of a series shed weavi

Details Shed holder element for the weaving rotor of a series shed weavi Shed holder element for the weaving rotor of a series shed weavi

1997-12-01

1999-08-24

Falik, Andy

Textiles: weaving

Special-type looms

Pushed shed pocket

D03D 4700, D03C 1300

Patent

active

059412887

DESCRIPTION:

BRIEF SUMMARY
BACKGROUND OF THE INVENTION

The invention relates to a shed holder element for the weaving rotor of a series shed weaving machine as well as to a weaving rotor and a weaving machine with shed holder elements in accordance with the invention.
Series shed weaving machines are multiple phase weaving machines (see e.g. EP 0 013 321) in which several weft threads displaced stepwise with respect to one another are inserted into travelling sheds, with a weaving rotor forming a plurality of sheds, each of which extends over the entire cloth width. The roller-like weaving rotor has axially directed blade-like combs with beat-up blades and/or guide blades. Shed holder members are placed alternately between the guide blades and determine the upper and lower shed positions of the warp threads.
Shed holder elements are known from EP 0 196 349, each of which has a warp thread guidance section which consists of a passage between two projections, with the base of the passage forming the high shed support for the warp threads. The projections have the function of the above-mentioned guide blades. The weft insertion is done by means of air. For some individual shed holder elements a form is provided in such a manner that space remains free for an auxiliary blower nozzle.
In known shed holder elements weaving errors continually arise if, for example, a warp thread cannot be moved correctly when a change is to be made from the upper to the lower shed position. Such a faulty movement is to be ascribed to an inadequately executed form of the shed holder elements.


SUMMARY OF THE INVENTION

The object of the invention is therefore to improve the form of the shed holder elements in such a manner that weaving errors are avoided as far as possible.


BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of the upper part of a shed holder element in accordance with the invention,
FIG. 2 is a cross-section along the line II--II in FIG. 1, and
FIG. 3 shows a section of a weaving rotor viewed in the direction of the rotor axis.


DESCRIPTION OF THE SPECIFIC EMBODIMENTS

The shed holder element shown in FIG. 1 has a width b which, in comparison with the length a, is shown too large in the figure. This width b amounts to about 2 mm, whereas the distance a is about 10 mm long.
The shed holder element 1 has the following parts: an upper shed support surface 11 for the warp threads 3, which is arranged between two ear-shaped projections 12 and 13; a weft thread channel 14 with the lateral exit opening 140 and with the direction of insertion indicated by the arrow F; and two parts 15, 15' that are not completely shown which are provided for fastening the shed holder element 1 in a weaving rotor 5 (see FIG. 3). The shed holder element 1 is moved by the weaving rotor 5 in the direction of the arrow P. The transverse groove 11' in the support surface has no functional significance and is present merely for reasons having to do with the manufacturing process.
The following additional designations are introduced for the description of the shed holder element 1 in relation to FIG. 1: lower shed zone 16, lower part 17, rear part 18, upper part 19, and front part 20. The lower part 17 includes the lower shed zone 16.
All edges shown in solid lines in FIG. 1 are to be imagined as rounded off. The edge 141 is in particular strongly rounded off at the entry side of the weft thread channel 14, as can be seen in FIG. 2.
In addition to two shed holder elements 1 and 1' fastened to the weaving rotor 5, FIG. 3 shows a beat-up blade 2 placed between them. The points of the beat-up blade 2 and of the shed holder elements 1 lying furthest outwards move along the circles 2a and 13a respectively. The warp threads 3 in the upper shed position are designated with 3', those in the lower shed position with 3". In shed holder elements 1 the weft thread 4 is located in the weft thread channel 14; in shed holder elements 1' it is located outside and in that position from which it can be beat up against the cloth edge 8 of the fabric 7 by the beat-up blades

REFERENCES:
patent: 2248461 (1941-07-01), Moessinger
patent: 3075560 (1963-01-01), Pfarrwaller
patent: 4290458 (1981-09-01), Steiner
patent: 4655259 (1987-04-01), Steiner

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