Plastic article or earthenware shaping or treating: apparatus – Control means responsive to or actuated by means sensing or... – Cutter control
Reexamination Certificate
1998-10-01
2001-04-03
Pyon, Harold (Department: 1722)
Plastic article or earthenware shaping or treating: apparatus
Control means responsive to or actuated by means sensing or...
Cutter control
C425S382200, C425S464000
Reexamination Certificate
active
06210143
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an apparatus for producing yarns of, for example, synthetic fibers.
2. Description of the Related Art
An apparatus for producing yarns, in which spun yarns are wound in the form of packages, includes a first yarn feed roller
11
and a second yarn feed roller
12
for feeding the yarns spun through spinnerets of spinning packs
5
to
10
in a spinning apparatus and cooled by a cooling device (not shown) at a predetermined rate, winders
1
-A and
1
-B for winding the yarns on tubes, yarn breakage detectors
15
-A and
15
-B for detecting that at least one yarn which is being wound by the winder
1
-A or
1
-B has broken, and a yarn cutting and sucking device
17
disposed upstream from the yarn feed roller
11
, which is operative in response to a yarn breakage detection signal to cut all yarns being wound and suck the same, as shown in FIG.
7
.
In the apparatus described above, if at least one yarn in the yarn group is broken for any reasons, the yarn breakage is detected by the yarn breakage detector
15
-A which issues a detection signal. Then, the yarn cutting and sucking device
17
is rapidly operated, by this signal, to cut all the yarns being wound via the first feed roller
11
and the second feed roller
12
by the winders
1
-A and
1
-B and suck the same thereinto, to prevent the yarns from being adversely wound around the first yarn feed roller
11
, the second yarn feed roller
12
and the winders
1
-A and
1
-B, which may result in an abnormality in the spinning operation.
In the above-mentioned method, wherein all the yarns are cut if only one yarn in the group belonging to one winder has broken, the yarns normally wound by another winder without yarn breakage must be cut, resulting in the reduction of yield of yarns as well as an increase in a burden on the operator caused by the threading operation.
SUMMARY OF THE INVENTION
The object of the present invention is to prevent a reduction in the yield of yarns and to prevent the operator's burden from increasing due to the threading operation which results from the fact that yarns of a normally operating winder having no yarn breakage are cut.
To solve the above problems, the present invention provides an apparatus for producing yarns wherein the respective one yarn cutting and sucking device and the respective one winder form one winding unit, and at least two winding units share at least one of the yarn feed rollers.
Additionally, the winders may be arranged in vertical row.
Also, a yarn path control guide may be provided for guiding yarns in such a manner that upon the threading operation of the rear side yarn group across the front side yarn group, due to an occurrence of yarn breakage or the like in the rear side yarn group, the rear side yarn group is moved from the front side region to the rear side region of the first common yarn feed roller while passing under or over the front side yarn group running through the first common yarn feed roller and then moved over or under the second yarn group running through the second common yarn feed roller.
REFERENCES:
patent: 3719442 (1973-03-01), Schippers et al.
patent: 4522774 (1985-06-01), Donnelly et al.
patent: 5419110 (1995-05-01), Mikami et al.
patent: 5794868 (1998-08-01), Busenhart et al.
patent: 52-24129 (1977-06-01), None
Hasegawa Katsumi
Takagi Jun
Burns Doane Swecker & Mathis L.L.P.
Del Sole Joseph S
Pyon Harold
Toray Engineering Co., Ltd.
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