Textiles: weaving – Weft manipulation – Weaving with stationary weft supply
Patent
1990-09-12
1992-04-28
Falik, Andrew M.
Textiles: weaving
Weft manipulation
Weaving with stationary weft supply
139452, 242131, D03D 4734
Patent
active
051079046
DESCRIPTION:
BRIEF SUMMARY
This invention relates to a loom having a compact bobbin holder.
As is known, looms have been provided with weft accumulators which are disposed laterally on the side of the loom frame for the feeding of weft yarns into the loom, for example, from a bobbin supply. For example, Swiss Patent 657,388 describes a relatively simple arrangement of supplying a weft yarn from a bobbin to a weft yarn accumulator for feeding into a shed of a weaving machine. In other cases, such as described in European Patent Application 0155431 and European Patent Application 0298025, at least two weft accumulators have been positioned laterally of a loom while one or more bobbins of weft yarn have been provided for feeding weft yarns to the accumulators for subsequent delivery to the loom. In particular, European Patent Application 0298025 describes the positioning of a weft bobbin changer and then a weft accumulator before the loom as considered in the direction of the longitudinal axis of the loom. The bobbin changer or holder has two turntables which are disposed one beside another and which receive weft yarn bobbins, one such bobbin at a time being adapted to be moved into the operative position to deliver weft yarn to a weft accumulator. After the weft yarn on a bobbin has been substantially exhausted the table rotates through a predetermined angle to move a fresh bobbin into the position of the previous bobbin. EP-A-0 298 025 also discloses means for joining the weft yarn of the new bobbin to the weft yarn of the previous bobbin.
The complete arrangement is relatively bulky since all the weft bobbins are disposed one beside another and take up space in the weaving shed outside the weft accumulators in the direction of the loom longitudinal axis.
It is the object of this invention to devise a very compact bobbin holder arrangement.
It is another object of the invention to reduce the space required for feeding a plurality of weft yarns to a loom.
It is another object of the invention to prevent tension peaks from occurring when a weft yarn is being drawn off a fresh bobbin during delivery to a loom.
Briefly, the invention provides a loom with at least two weft accumulators positioned longitudinally adjacent a side of the loom for feeding weft yarn to the loom longitudinally of the loom axis and a bobbin holder positioned longitudinally adjacent the same loom side and transversely adjacent the accumulators. The bobbin is provided with at least two tables, arranged one above the other, for receiving a plurality of bobbins of weft yarn and each is positioned for feeding weft yarns from the bobbins transversely of the loom axis to a selected weft accumulator.
The bobbin holder is thus disposed in a space which is bounded on one side by the weft accumulators and on a second transverse side by the loom.
This feature enables the space available laterally of and adjacent the weft accumulators transversely to the loom axis to be used without much space being required lengthwise of the complete arrangement over and above the space required by the weft accumulators. Despite the compactness of the bobbin holder, up to eight weft bobbins can be received in this way. Thus, the loom can be operated for longer time periods without the exhausted bobbins having to be replaced by fresh bobbins.
The weft bobbins can be mounted in a circle on a round table pivotable stepwise around a central axis by a drive. A yarn guide can be associated with each weft bobbin and is moved together with the table to guide the weft yarn above and beside the end of a weft bobbin, to ensure that weft yarn of any bobbin cannot catch in the weft yarn of some other bobbin. An intermediate accumulator for weft yarn can be disposed between two weft bobbins and can be embodied, for example, by an elongate U-section chamber, the chamber aperture being covered laterally on one long side of the intermediate store by a brush. The intermediate accumulator can be filled by an injector nozzle. The arrangement of the intermediate accumulator prevents tension peaks from occuring w
REFERENCES:
patent: 3258222 (1966-06-01), Silva et al.
patent: 3640440 (1972-02-01), Sedlarik et al.
patent: 3693904 (1972-09-01), Bucher
patent: 4836468 (1989-06-01), Singer
patent: 4887649 (1989-12-01), Van Mullekom
Falik Andrew M.
Sulzer Brothers Limited
LandOfFree
Loom having a compact bobbin holder does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Loom having a compact bobbin holder, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Loom having a compact bobbin holder will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1241174