JPH09241994A - Joining part of drier canvas for producing paper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the joining part of a drier canvas for producing paper, capable of preventing a terminal weft from slipping out in the width direction of the canvas, forming the proper size loops of warps, facilitating a core wire- inserting work on the application of the canvas to a paper-producing machine, and satisfying the surface property and durability of the joining part, when the warps of the drier canvas having a tissue, in which each of the warps jumps over two wefts on one side of the double cloth, are partially extended to form the loops used as the joining part. SOLUTION: A warp for binding terminal wefts is arranged to bind the terminal wefts 24, 21, and subsequently passed over three wefts 21, 22, 23 from the end of one side of a drier canvas to its back side. Simultaneously, a warp 11 jumped over the weft 21 and subsequently looped is passed between the wefts 24 and 21, arranged to weave the weft 22, and then passed to the back side of the canvas.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a joint portion of a dryer canvas for papermaking used in a drying process of a paper machine.

[0002]

2. Description of the Related Art As a joint of a dryer canvas, a weft yarn at the end of the dryer canvas body is temporarily removed to obtain an extended warp, and the extended warp is folded back to form a joining loop when weaving with the weft yarn at the end of the dryer canvas body. It is well known that a binding yarn of the front weft is formed. Since the surface properties, flexibility, air permeability, etc. of this joint are almost the same as the characteristics of the canvas body, there are almost no quality problems due to the joint, and it is one of the most widely used ones.

However, in a structure in which two weft threads on the wet paper surface are skipped in order to make the wet paper surface smooth, the crimp pile formed on the extended warp obtained by temporarily removing the weft threads on the end of the main body has a wet paper surface and its On the other side, the shape is different, and if a joint is made by the conventional method as shown in Fig. 2, the crimp pitch will make the loop diameter extremely small if the loop is constructed with one crimp pitch. Further, if the loop is formed with 1.5 pitches, the diameter becomes extremely large, and in any case, a suitable fitting for the dryer canvas cannot be obtained.

[0004]

If the joint loop has a small diameter, it is difficult to insert the core wire when setting the canvas on the paper machine. On the contrary, if the diameter is too large, the surface property of the joint portion deteriorates and wet paper is applied. Marking occurs and bending fatigue of the loop increases, resulting in deterioration of the durability of the joint. Also, the terminal weft 2
Since the binding of 1'and 24 'becomes weaker, the end weft 2
1'and 24 'tend to come out in the width direction of the canvas.

[0005]

The present invention has been made in view of the above problems, and has the following configuration. As shown in FIG. 1, warp yarn 1 in which end weft yarns are bound
2 splices the weft yarns 24 and 21 at the end, and jumps over the weft yarns 21, 22 and 23 from the extreme end of one side of the canvas to the other side, and weft 2
After jumping over 1, the warp 11 made into a loop is the weft 24.
It is made so that it can pass through the space between No. 21 and 21, and weft yarn 22 can be woven into the other side.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION With the construction of the joint according to the present invention, the binding of the end wefts 24 and 21 becomes strong, and the warp 1
Since 2 is pulled toward the canvas main body, the end wefts 21 and 24 are prevented from slipping out in the width direction of the canvas, and when the loop is configured with one crimp pitch, the loop diameter becomes an appropriate size. A core wire can be easily inserted when setting a canvas on a paper machine, and a joint having satisfactory surface properties and durability of the joint can be obtained.

[0007]

An embodiment of the present invention will be described with reference to FIG. FIG. 1 shows a joint portion according to the present invention applied to a double-woven dryer canvas made of polyester monofilament having a diameter of both warp and weft of 0.45 mm.

After the warp yarn 12 for stitching the terminal weft yarns has stitched in the end weft yarns 24 and 21, it jumps over the weft yarns 21, 22 and 23 from the most distal end of one side of the canvas to the other side. At the same time, the warp 11 which is formed as a loop after jumping over the weft 21 passes through between the wefts 24 and 21 and weaves the weft 22 so that the warp 11 can escape to the opposite surface.

Since the warp 11 constitutes a loop with one crimp pitch and the diameter of the loop is an appropriate size, it is easy to insert the core wire when setting the canvas on the paper machine, and the joint It was possible to obtain a joint with satisfactory surface properties and durability.

[0010]

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a prior art fitting.

[Explanation of symbols]

 11, 11 'Loop forming warp 12, 12' Spelling warp 21, 22, 23, 24, 25, 21 ', 24' Weft

Claims (1)

[Claims] 1. A part of a warp yarn of a dryer canvas having a design in which two weft yarns on one side of a double woven fabric are jumped over to form a loop forming warp yarn 11, and a loop is formed from this. At the joint portion of the dryer-canvas, which is formed by folding back and weaving the tip again into the structure of the dryer-canvas body, the warp threads 12 for binding the terminal weft threads are the weft threads 2 at the end.
After binding 4,21, the warps formed after jumping over the weft yarns 21, 22, 23 from the extreme end of one side of the canvas to the other side and jumping over the weft yarn 21 at the same time A joint portion of a dryer canvas for paper making, characterized in that 11 has a joint portion made so as to pass through between weft yarns 24 and 21 and weave yarn 22 so as to escape to the opposite surface.