Ribbon loom with a weft insertion needle

Details Ribbon loom with a weft insertion needle Ribbon loom with a weft insertion needle

1995-01-12

1996-10-15

Falik, Andy

Textiles: weaving

Weft manipulation

Weaving with stationary weft supply

D03D 4706, D03D 4710

Patent

active

055644775

DESCRIPTION:

BRIEF SUMMARY
BACKGROUND OF THE INVENTION

1. Field of the Invention
The present invention deals with a filling thread insertion or shooting needle for a ribbon weaving machine as well as a ribbon weaving machine itself equipped with such a filling thread insertion needle.
Various embodiment forms of filling thread insertion needles are used in ribbon weaving machines.
2. Description of the Prior Art
In the group of embodiment forms of filling thread insertion needles (EP 0 121 648 B1, GB 1 424 301, GB 2 146 665 A) a hook exists for gripping the filling thread to be inserted and a thread guide is provided for additional filling threads. The thread guiding is accomplished through a slot, which extends essentially across the length of the needle. This slot can be configured within the needle or can be formed by the needle body and a second member connected therewith. These embodiment forms have the following disadvantages in common: that the guidance is disposed either above or below the needle body and consequently the filling threads, which do not have to be inserted cannot form a shed and are carried along loosely similar to warp threads and also that a filling thread, which is not inserted over a larger distance, floats and becomes visible at the edge of the fabric. This can indeed be partially prevented in that blind fillers are inserted, which is disadvantageous, since the overall productivity is thereby reduced, meaning the weaving output is lower and the thread consumption is greater. In addition such blind fillers can impair the appearance of the fabric, in particular because loose dark figure or fancy threads appear as being translucent through light color weaves.
In another group of embodiment forms the filling thread insertion or shooting needles have only a hook at the needle tip, which is configured on the needle at the bottom or the top. A guidance has not been provided. In these embodiment forms the shedding motion of the non-inserted filling threads is possible. In this case it is disadvantageous that the filling thread can be inserted only on one side, which excludes the so-called pic-pic, and that a special laying-in device is required, whereby the weaving speed is reduced because of the extremely rapid laying-in and picking-out motion.
Finally filling thread insertion or shooting needles are known (CH 16 654 A5), which comprise a fork-shaped recess at the needle tip for gripping the filling thread to be inserted. With this filling thread insertion needle any desired filling change is possible wherein however the following disadvantages have to be accepted: the fork, are carried along as filling threads. Weaving errors and warp thread breaks consequently occur. fork is open towards the tip of the needle. Due to this a higher filling thread tension must be provided which tends to increase the filling thread breaks.
Both above phenomena have a disadvantageous or negative effect upon the productivity of the ribbon weaving machine.


SUMMARY OF THE INVENTION

The invention wants to remedy or redress this state of affairs. The invention solves this task, by inserting or shooting one single filling thread out of a number of the filling threads guided in the filling thread insertion needle and by forming a shed out of the remaining filling threads.
The invention affords expediently the possibility needle body; of the weave or tissue, thus making them invisible; a conventional Jacquard apparatus; using any special motion sequence; impeccably tensioned stitch edge.


BRIEF DESCRIPTION OF THE DRAWINGS

In the following the invention is described with the help of the enclosed drawings. It is shown on:
FIG. 1 a diagram of a portion of a weaving machine in side view;
FIG. 2 a presentation of a shed of the weaving machine in FIG. 1 during insertion of a filling thread;
FIGS. 3 to 5: an embodiment form of a filling thread insertion needle in the invention in the course of filling thread insertion in three positions, shown diagrammatically; and
FIG. 6 and 7: another embodiment form of a filling thread insertion needle

REFERENCES:
patent: 4541461 (1985-09-01), Villa
patent: 4562868 (1986-01-01), Jammes

Affiliated with

Also associated with

Rating

Ribbon loom with a weft insertion needle does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Ribbon loom with a weft insertion needle, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ribbon loom with a weft insertion needle will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1238933