Textiles: manufacturing – Warp preparing or handling – Reeling or beaming
Reexamination Certificate
2001-08-27
2002-06-04
Vanatta, Amy B. (Department: 3765)
Textiles: manufacturing
Warp preparing or handling
Reeling or beaming
Reexamination Certificate
active
06397442
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a sample warper equipped with short feed belts and capable of winding a yarn with effectively reducing increase of the tension of yarns, which would unavoidably occur during conventional warping, particularly during orderly winding yarns on a warper drum in successive warp turns. The present invention relates also to a method for winding yarns on the warper drum in successive warp turns using the above-mentioned sample warper.
2. Description of the Related Art
Conventional electronically-controlled sample warpers of the described type are exemplified by Japanese Patents Nos. 1,529,104 and 1,767,706 (U.S. Pat. No. 4,972,662 and European Patent No. 035480). The first-named Japanese publication discloses a sample warper W as shown in
FIG. 9
of the accompanying drawings. The sample warper W of
FIG. 9
comprises: a yarn introduction means
6
, rotatably mounted on one side surface of a warper drum A for winding a yarn on the warper drum A; a plurality of yarn selection guides
27
, associated with the yarn introduction means
6
and mounted on an end of a base Y supporting the warper drum A for association with the yarn introduction means
6
and, for moving angularly movable to project to a yarn exchanging position and retract to a standby position during yarn changing; a fixed creel B for supporting a plurality of bobbins
160
, which are associated with the plural yarn selection guides
27
and on which various kinds or a single kind of yarns
22
are to be wound, thereby confirming transferring of the yarns
22
between the yarn introduction means
6
and the yarn selection guides
27
so that the yarns are automatically changed and successively wound neatly on the warper drum A in a preset sequence.
In the sample warper W, the plural yarn selection guides
27
receive the plural yarns
22
, respectively, so that the individual yarns
22
of the fixed creel B can be successively wound on the warper drum W in a fully controlled manner. Reference numeral
17
designates a plurality of conveyer belts movably mounted on a circumferential surface of the warper drum A.
The second-named Japanese publication discloses another sample warper W for winding a plurality of yarns concurrently as shown in FIG.
10
. The sample warper W of
FIG. 10
has a plurality of yarn introduction means
6
a
-
6
h
(eight yarn introduction means are shown in
FIG. 10
) for winding a plurality of yarns
22
, which are paid out from a rotary creel F with a plurality of bobbins
160
, on the conveyer belts
17
.
Each of the sample warpers W shown in
FIGS. 9 and 10
has a plurality of parallel lease members (a plurality of parallel lease rods
18
a
-
18
g
) longitudinally extending alongside of the warper drum A. The basic structure and operation of the sample warpers W are well known as by the above-mentioned Japanese publications, so their detailed description is omitted here.
Japanese Patent No. 2854789 discloses a sample warper capable of winding a yarn orderly in successive turns independently of a number of turns so as to make a long sample or a small lot of product, namely, flexible manufacturing. The basic structure and operation of this sample warper are described in the above-mentioned Japanese publications, so their detailed description is omitted here.
When long size warping orderly in successive turns (in which the number of yarn windings increases) is conducted using the above-mentioned conventional sample warpers, a yarn
22
is wound directly on the conveyer belts
17
as shown in FIG.
11
. In
FIG. 11
, reference numeral
16
designates a drum spoke, on which a conveyer belt
17
is movably mounted. Reference character G designates guide means for winding a yarn orderly in successive turns, and reference numeral
100
designates an attaching member for attaching the guide means G on a base end of the conveyer belt
17
. Since the yarn
22
is tightened on the conveyer belts
17
with a considerable amount of tension as the yarn
22
wound on the conveyer belts
17
becomes longer, the conveyer belts
17
cannot move smoothly. These conventional sample warpers are therefore disadvantageous because they require a considerable amount of power so as to drive the conveyer belts move stably.
In addition, when warping stretch yarns orderly in successive turns using the conventional sample warpers, the tension on the conveyer belts
17
would be very large during warping the stretch yarns orderly in successive turns, so that the attaching members
100
of the guide means G need to have enough strength to withstand such large amount of tension. Thus as the demand for flexible manufacturing is presumably on the rise in future, the above-described conventional sample warpers would be unable to use in the absence of some considerable reconstructions.
SUMMARY OF THE INVENTION
With the foregoing problems in view, it is an object of the present invention to provide a sample warper capable of winding a yarn with an effectively reduction of possible increase of the tension of yarns, which would unavoidably occur during conventional warping process, particularly orderly warping process in successive warp turns. Another object of the present invention is to provide a method of winding a yarn using the above-mentioned sample warper.
According to a first aspect of the present invention, there is provided a sample warper which comprises: a warper drum; a plurality of parallel conveyer belts mounted on a circumferential surface of the warper drum so as to extend in parallel to the axis of the warper drum and movable concurrently and longitudinally at a predetermined rate; at least one yarn introduction means rotatably mounted on a side surface of the warper drum for winding at least one yarn on the plural conveyer belts concurrently; a plurality of parallel lease rods longitudinally extending alongside of the warper drum for leasing the yarn; a creel supporting a plurality of bobbins from which yarns are paid out; and a plurality of short feed belts mounted on the circumferential surface of the warper drum at its end adjacent to the yarn introduction means so as to be movable in parallel to the plural conveyer belts, each of the short feed belts having an upper surface which is disposed radially outwardly of an imaginary cylindrical surface enclosing upper surfaces of the plural conveyer belts with respect to the axis of the warper drum; the yarn introduction means being operable to wind the yarns on the short feed belts so that the yarns are transferred from the short feed belts onto the plural conveyer belts for warping thereon.
As a preferred feature, the upper surfaces of the short feed belts extend radially outwardly of the imaginary cylindrical surface enclosing upper surfaces of the plural conveyer belts with respect to the axis of the warper drum. With this preferred feature, it is possible to reduce the whole tension of the yarns by transferring the yarns from the short feed belts onto the conveyer belts during the warping, thereby also reducing the tension (load) on the conveyer belts.
As another preferred feature, the short feed belts have flat surfaces, on which the yarns are to be wound, slanting down to their ends in a warping direction. The short feed belts are movable in synchronism with the movement of the conveyer belts in the same direction as that of the conveyer belts so that the yarns can be transferred onto the conveyer belts without disturbing the arrangement of turns of the yarns on the short feed belts.
As still another preferred feature, the short feed belts are also movable vertically so that the tension of the yarns can be adjustably reduced while transferring the yarns from the short feed belts onto the conveyer belts by varying the vertical positions of the short feed belts in accordance with the kind of yarns or characteristics of yarns.
As a further preferred feature, the sample warper of the present invention also has a plurality of guide means mounted on base ends of the short feed belts a
Aihara Takatsugu
Tanaka Yoshihiro
Suzuki Warper Ltd.
Vanatta Amy B.
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