CA1318830C - Method of manufacturing an insertion-type seam for making a cloth belt endless, and seaming machine - Google Patents

Method of manufacturing an insertion-type seam for making a cloth belt endless, and seaming machine

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Publication number
CA1318830C
CA1318830C CA000605435A CA605435A CA1318830C CA 1318830 C CA1318830 C CA 1318830C CA 000605435 A CA000605435 A CA 000605435A CA 605435 A CA605435 A CA 605435A CA 1318830 C CA1318830 C CA 1318830C
Authority
CA
Canada
Prior art keywords
cloth
threads
weaving
wires
warp
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CA000605435A
Other languages
French (fr)
Inventor
Bernhard Krenkel
Heinz Joos
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
WIS Seaming Equipment Inc
Original Assignee
Foberdorfer & Co KG Industriegewebe-Technik GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Foberdorfer & Co KG Industriegewebe-Technik GmbH filed Critical Foberdorfer & Co KG Industriegewebe-Technik GmbH
Application granted granted Critical
Publication of CA1318830C publication Critical patent/CA1318830C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21FPAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00Wet end of machines for making continuous webs of paper
    • D21F1/0027Screen-cloths
    • D21F1/0054Seams thereof

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  • Woven Fabrics (AREA)
  • Sewing Machines And Sewing (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Decoration Of Textiles (AREA)
  • Display Devices Of Pinball Game Machines (AREA)

Abstract

A Method Of Manufacturing An Insertion-Type Seam For Mak-ing A Cloth Belt Endless, And Seaming Machine Abstract The invention is directed to a method of manufacturing an insertion-type seam for making a cloth belt, especially a wire cloth, endless, in which the warp ends of each cloth side are interwoven with an auxiliary warp strip, and to a seaming machine for carrying out the method. In order to mechanize and automate the conventionally required in-tricate and time-consuming manual work for preparing the insertion-type seam and to thereby achieve a significant relief of personnel and thus an improvement in productivi-ty and the quality of insertion-type seams, it is proposed that the warp ends after unravelling of the right-hand and the left-hand cloth sides are strung in a magazining bunch, and thereafter mechanically individually separated in accordance with the weaving order and alternatingly re-turned and re-woven about a central wire of any desired cross-sectional area, said central wire being disposed in the centre of the auxiliary warp strip and consisting of at least one wire, so that in accordance with the weaving progress a warp end of the right-hand and the left-hand cloth side alternately winds about the central wire, while the respective opposite warp is re-woven without be-ing looped about the central wire, the warp ends after in-sertion into the shed made in accordance with the weaving order being beaten up in parallel to the selvedge.

Description

1 3 1 ~830 , 1 Background of the Invention The invention is directed to a method of manufacturing an insertion-type seam for making a cloth belt especially a wire cloth or a paper-making fabric endless. The invention is also directed to a seaming machine for carrying out the method.

Cloth belts of the above-specified type comprise especially dehydration or dryer wire cloths. As compared to endless-woven wire cloths or wire cloths made endless by a woven seam, wire cloths with an insertion-type seam offer the advantage that they may be made endless in the suction extractor or in the dryer section of the paper-making machine itself by joining the two prepared cloth ends by means of an insertion wire. Up to now, these insertion-type seams have been prepared manually by re-weaving or re-splicing ~he warp threads of ~ach cloth side of two c10th ends ~o be joined by a seam, so that a series of warp thread loops is formed on each side through which then the common joining insertion-wire may be passed.

This preparation of such an insertion-type seam which is described in European Patent û043441 and German Utility Model 81 22 45l, with regard to making dehydration wire cloths with one seam endless, is very labour-consuming and expensive since it is performed manually.

Sum ~ ~ iion It is therefore an object of the invention to provide a method, and it is a further object of the invention to provide a machine, permitting mechanization and automation of the intricate and time-consuming manual work, whereby a significant relief of personnel and 1 thus an increase in productiveness and an improvement in the quality of insertion-type seams can be achieved.

These and other objects of the invention are accomplished in that the warp ends after unravelling of the right-hand and the left-hand cloth side are strung in a magazining bunch, and mechanically individually separated in accordance with the weaving order and alternatingly returned and re-woven about a central wire of any desired cross-sectional area, said central wire being disposed in the center of the auxiliary warp strip and consisting of at least one wire, so that in accordance with the weaving progress a warp end of the right-hand and the left-hand cloth side alternately winds about the central wire, while the respective opposite warp is re-woven without being looped about the central wire, the warp ends after insertion into the shed made in accordance with the weaving order being beaten up in paral-lel to the selvedge.

According to another mode of operation, the method of the invention resides in that the warp ends, after unravelling of the right-hand and left-hand cloth ends, are strung to form a magazining bunch, mechanically separated in accord-ance with the weaving order and individually respectively re-woven about a loop of a wire helix, wherein when two wire helices are used the same are disposed in parallel and are not interconnected, and wherein the left-hand and the right-hand cloth ends are retained in such a way that any lateral slipping or displacement is prevented. Thereafter, the wire helices are interconnected by means of a common inserted wire externally of the seaming machine.

According to a further proposal, the method of the invention resides in that the warp ends~ after unravelling of the right-hand and left-hand cloth ends, are strung to form a magazining bunch, and mechanically separated in ac-cordance with the weaving order and individually respect-ively re-woven about a loop of a wire helix, wherein when two wire helices are used the same are disposed in paral-lel fitted into each other, and wherein progressing with the seam a central wire is fit into both helices, connect-ing them and thus both cloth ends with each other such that lateral slipping between both cloth ends and on the seaming machine is prevented.
.

To perform the method according to the invention a seam-ing machine is used which is characterized by separators disposed on either side of the insertion-type seam to be made for removing and separating the warp ends from the warps of each cloth side which are arranged in magazining bunches, a gripper system comprising transfer grippers and drawing-in grippers for inserting the separated individual threads into a shed preformed from auxiliary warps by a shedding mechanism, the individual threads adapted to be beaten up to the respective selvedge within said shed by a driven lathe respectively provided for each seaming half, wherein subsequent to beating-up the individual threads are re-woven by means of the gripper system either about one or several central wires or wire helices or, avoiding the central wire or wires or wire helices directly into their own side of the cloth.

Additional objects, features and advantages of the invention will become apparent from the subclaims.

131~830 1 Brief Description of the Drawings .

The invention will be described in detail hereinbelow with reference to the embodiments thereof illustrated in the drawings, in which Fig. 1 is a schematic isometric front view of the seaming machine according to the invention, Fig. 2 is a reduced-scale end view of the machine illustrated in Fig. 1, in which the cloth belt that is to be made endless is passed like a tent across the seaming machine, Fig.2a is a detailed side view of the device for the connection and disconnection of the drive motor of the seaming machine, Fig. 3-5 are schematic views showing the operating steps when making the insertion-type seam for one cloth side, Fig. ~ is a schematic plan view of the seam of the right-hand and the left-hand cloth sides to be joined by means of a central wire, Fig. 7 is a plan view similar to Fig. 6, in which however two parallel inserted wires are used instead of a single central wire, Fi9. 8 is a plan view of a cloth end having a wire helix interwoven therein, each warp thread end being tied up in the helix, 1 Fig. 9 is a cross-sectional view of two cloth ends each prov;ded with a wire helix, said cloth ends being positioned by means of a device including guide rollers, Fi9. 10 is a plan view similar to Fig. 8 of a cloth end in which the wire helix is woven-in together with a wire placed therein.

Fig. 11 is a plan view of two cloth ends each having a wire helix interwoven therein and a partially inserted central wire, Fig. 12 is a sectional view of the seaming machine shown in Fig. 1 in a longitudinal direction along a line of symmetry, Fig. 13 is a cross-sectional view of the seaming machine shown in Fig. 1, Fig. 14 is a general view of the seaming machine with travelling mechanism and single thread suspension, Fig. 15 is an isometric view of an assembly comprising thread separators, transfer grippers and holding-down device, Fig. 16 is a view of the major parts of the thread separator assembly, Fig. 17 is a side view and a front view of the transfer gripper assembly, Fig. 17a is a sectional view of the head of a transfer gripper, Fig. 18 is a ~ide view and a ~lan view of the threading gripper assembly, Fig~ 18a is a sectional view of the head of the threading gripper.

Fig. 19 is a view of both lathes, and Fig. l9a is a side view of a lathe according to arrow A
in Fig. 19.

Detailed Description of the Pre~e,rred Embodiments sf the Present Invention As ~ill be apparent from Figures 1, 12 - 14, the seaming machine comprises essentially a travelling mechanism 1, 1~ guided by a frame 3, 4, 4' and mounted on the travelling mechanism there is a jacquard head 40, a harness 50, a single thread suspension 60, a thread separator 7, 7', a trans~er gripper 8, 8', a threading gripper 9, 9', a lathe 10, 10', a control console 70, an electric-control unit 80 and a pneumatic-control unit 90.

Referring to Figures 1, 12 and 13, the travelling mechanism 1 includes a frame body 31 movable on wheels 30, said frame body being adapted to be moved via a controlled drive motor 2 with the rhythm o~ the weaving progress. The traveIling mechanism 1 is a welded structure and serves to support a machine table 32, the above identified units as well as the feed unit 35 during the weaving process. The travelling mechanism 1 can be driven automatically with a gear-break motor 2 followed by a ~igh reduction gear 37. Thus for instance a feed of 0.01575 inch/sec (0.4 mm/sea) can be achieved. The feed of the seaming mach~ne is controlled dependent on the density of the cloth, whereby the duration of the moving pulse is to be entered in the program by means of a timer depending on warp count division. Without the weaving ~, program the seaming machine can be run by means of the gear-motor 2, 37 with push buttons connected therewith in a ~orward and a backward direction. The forward direction concurs with the seaming direction. This mode of operation has been provided for travelling across short distances e.g. for the start up of a weaving process or during the occurrence of a fault. If it is necessary to shift the seaming machine over larger distances, as would be the case when a seam is finished and a wire removed, to return the seaming machine into the start position, then the gear-break motor 2, 37 can be disconnected. This can be done by means of a device 36 comprising a star handle screw 38. The seaming machine can then be moved manually. To disconnect the gear-break motor 2, 37 the star handle screw 38 (Fig. 2a~
is slackened, while the gear-break motor 2, 37 is held firmly until the screw 38 is free. Then the g&ar-break motor 2 is pushed downwards on its hinge in the direction of arrow B. ~he worm gear 36a is then disconnected. For automatic operation the gear-break motor 2 is pushed upward on its hinge and the seaming machine is moved sideways until the worm 36a engages in the worm wheel 36b. Following this the star handle screw 38 can be retightened.
The frame consists in general of two stands 4, 4' and two supporting- and guiding tubes 3 as well as for wide and heavy wire cloth additionally of one or two intermediate pillars 4a for the support o~ the supporting tubes 3.
The frame body 31 of the travelling mechanism is guided on either side below the working plane of the machine by the two parallel supporting- or guiding tubes 3 the ends of which are in turn mounted on a horizontal cross-tie or machine table 32 of the frame or stand 4. In general the "~' ' ~,~

1 3 1 883~

- 7a -stand 4 does not comprise wheels and is located on that side of the seaming machine, where the start-up of the seaming takes place. The stand 4 has the function of guiding and clamping of ,. . .

1 the supporting tubes 3 as well as the clamping of the auxiliary warp threads respectively auxiliary warp strips 15, 15' and the central wire 16. The stand 4 serves furthermore for the mounting of deflection pulleys 13a for loading the magazining bunches 13, 13', for attachment of the connecting socket for the power supply and for the attachment of a compressed-air spiral tube. In a further embodiment the stand 4' has four steering rollers 4b and 4c whereby the steering rollers 4b are provided with breaks which can be locked during operation of the seaming machine. The stand 4' also has the function of guiding and clamping of supporting tubes 3 as well as the clamping of maga~ining bunches 13, 13'.

The jacquard head 40 known in the art is mounted centrally on the traveling mechanism 1. The jacquard head 40 can for example be designed for 216 threads whereby 198 threads can be used, when the first two and the last rows of the jacquard cards are left free in the jacquard head.
The first two rows of the jacquard cards44 are required for controlling a double needle 7a of the thread separator 7, 7'. The last row of jacquard cards can be omitted in order to improve the shed geometry. As change device 46 for the central wire 16 a pneumatic cylinder 452 is ~~
mounted on brackets 51. The central wires 16 are controlled by signals included in the weaving program. Besides the automatic operation of the jacquard head 40 it can be operated manually with respective switches and push buttons. By means of these push buttons a manual change of shed can be accomplished.

The harness 50 is fitted with 198 threads for the example given above. That means that seams with a maximum of 198 threads can be made. For seams with a smaller number of auxiliary warp threads 15, 15', the threads should be divided symmetrical in the center of the ..

1 3 1 8~30 harness 50 and if required every third or fourth harness eye 52 should be left Pree, dapending on the numher of auxiliary warp threads. The basic tensic)n of the harness springs 53 can be altered by raising or lowering the base of the spring 54.

~he single thread suspension 60 is shown detailed in Figure 14. Thus each auxiliary warp thread 15, 15' is provided with a weight 62. For this purpose the auxiliary warp thread 15, 15' is connected to the Gonnectiny thread 63 of the weight 62 by a special coupling ~4 after threading into the harness eye 52. In one embodiment the weights 62 are made from brass. With a diameter of ~ mm a weight 62 having a length of 600 mm weights approximately 65 g.

Referring to Figures 1, 12-14 and 16, the thread separators 7, 7' are mounted via a bracket 51 on the travelling mechanism 1 like the above-mentioned shedding mechanism 5 (see Figures 3-5) respectively to the jacquard head 40. The warp threads 12, 12' chosen to be woven are released by the thread separator 7, 7' one-by-one from the magazining bunrh 13, 13' and positioned for the transfer gripper 8, ~'. The force oX the separating head 7b is determined by a spring 7c, which is connected to a pneumatic cylinder 7d~ The thread separators 7, 7' can be adjusted horizontally and vertically with knurle screws 7e. The entire mechanism 7 to 7e and 8 to eg can be turned into an upper position thus allowing free access to tha seam area. The size of the separating needles 7a, which are provided with two hooks 7g, 7g', for the separation of threads for fine cloth consisting of multiple layers depends on the profile of the warp A
, threads 12, 12~ The depth of the hook 7a for round warp threads could always be 25 to 30% less than the diameter of the warp threads. Oval and rectangular warp threads raquire specially adapted separating needle~ 7a. The thread separator 7, 7' can be operated automatically as well as manually. The same holds true for the device for the tensionin~ of the thread separators 7f respeative of the motion o~ the separating needles 7a.

~he bracket 51 has also secured thereto thread separators 7, 7' and transfer grippers 8, ~'. As it is the case for ; the thread separators 7, 7' there is one transfer gripper 8 and 81 respectively provided each for one of both cloth halves, wherein the primed reference numerals relate to one cloth half and the n~n-primed ones relate to the opposite second cloth half. The transfer grippers 8, 8' take the single thread 12a off the thread separator 7, 7' to the threading gripper 9, 9' being in a ready position.
The transfer grippers 8, 8' are driven by pneumatic rotary drives 8a lFig. 15). The angle of swing of the transfer grippers 8, 8' can be adjusted continuously by means o-~ stop screws 8b. For the proper control of end positions electronic indicators 8c are mounted on the stop screws 8b. For an adjustment of the end positions of the transfer grippers 8, 8' said screws are loosened on the electronic indicator elements as well as lock nuts 8e on the stop screws 8b. FQ110Wing this the turning angle and thus the position of the transfer grippers 8, 8' can be adjusted with the stop screws 8b. The transfer gripper tensioners 8f are equipped with eleatric contacts 8g. If a t~read 12a is missing the control system switches into a fault condition such that the operation o~ the seaming machine is holded. For the insertion o~ a mlssing thread 12a in the transfer gripper tensioner 8~
(Fig. 17a) the tensioner can be held open through a push button and a switch as long as it is necessary to insext a thread by hand. In order to keep the beating-up line and the seam in the area where it is processed in the same level as the cloth a holding-down device 8d is provided for as shown in Figure 15.

Underneath the working plane of the seaming machine are the threading grippers g, 9' (Fig. 18) as well as the two lathes 10, 10' tFig. 19~, The drawing-in grippers 9, 9' serve mainly two functions namely taking the warp thread ends 12, 12' off the trans~er grippers 8, ~' and entering these auxiliary weft threads in the alternately opened sheds 5a, 5b, 5c of the seam and further the reciprocal transfer of the warp thread ends 12, 12~ which are woven back. The drawing-in grippers 9, 9' are driven by pneumatic rotary drives 9a with end position indicator 9b and installed cylinders 9c for intermediate positions 9d.
The end positions ge o~ the drawing-in grippers 9, 9' can be adjusted continuously by means of stop screws 9f. The indicator elements 9b are fastened to the stop screws 9f and must be removed prior to an adjustment of the stop screws 9f. To confirm intermediate positions 9d, cams 9h are fitted to bottom shaft ends 9g of the drawing-in grippers 9, 9'. When the intermediate position 9d is reached the cams 9h trigger approximation initiators 9i.
For the adjustment of intermediate positions 9d the seaming machine is switched off with the master switch.
Following this compressed air conneations 9j at the cylinder bottom 9k as well as lock nuts 91 at the cylinder neck gm have to be disconneated. Then the desired position 9d is set by turning the cylinder 9c.

~' A$terwards the air connections 9j and the lock nuts 91 are retightened and ~hen the cams 9h are readjusted for the confirmation of the intermediate position 9d. ~he gripper heads 9n ~Fig. 18a) are equipped with electrical contacts 9p which in lack of a thread transmit a signal to the m~chine control system to switch the machine into a fault condition.

Within the seaming machine two lathes 10, 10' are mounted as shown in Figures 19, l9a whereby one is located at the operating side and the other one on the back side. The lathes 10, 10' are driven by pneumatic cyli~ders lOa.
These are equipped with throttle valves lOb ~or speed adjustment of the lathes 10, 10'. The lathe reed lOc must be individually made up for each cloth from respective dents lOd and spacer discs lOe. It may then beco~e necessary to pull through more than one auxiliary warp threads 1~, 15' per opening 10~.

The bracket 6 mounts furthermore switching- and controlling devices which are necessary for the operation of the seaming machine and arranged in a control console 70. The switching- and indication devices arranged in the control console 70 ~erve the activation and control o~ gear-break motox 2, 37, the jacquard head 40, the shedding device, the thread separator 7, 7' and the ~5 thread separator tensioner 7f, the transfer gripper 8, 8' and the transfer gripper tensioner as well as the drawing-in gripper 9, 9' and the drawing-in gripper tensioner. Furthermore, a selector switch for automatic and single step operation and a push button ~or emergency stop are installed.

1 31 ~830 - 12a -The electric control unit 80 contains the main switch, clrcu.it-breaker, contactors and a storaqe-proqrammable controlling unit.

The pneumatic control unit 90 contains valves for all grippers 7, 7', 8, 8', 9, g', lathes 1~, 10 r ~ insertion wires and shedding mechanism.

In Fig~ 1, t~e wire cloth 11 to be provided with an insertion-type seam passes beneath the seaming machin~e, i.e~, the machine travels on the wirP cloth which is 1 covered with a protective layer~ An alternative way of guiding the wire cloth 11 is shown in Fig. 2, where the wire cloth is passed like a tent via two supporting rods 23, 24 across the seaming machine.

Prior to being placed in the seaming machine, the two ends 21, 22 of the wire cloth 11 to be provided with an insertion-type seam are prepared by removal of the wefts in a region having a width of ca. 10 to 20 cm, whereupon 10 to 30 wefts, depending on the weave, are combined on the warp ends 12, 12' in their exact weaving position to form a magazining bunch 13, 13'. The magazining bunches 13, 13' are secured by clamping means 14 at the end stands 4, 4' of the traveling mechanism 1, only one of said stands being illustrated in Fig. 1.
Before the seam is made, a group of wires which may either consist of original wefts of the cloth or may be a strip 15, 15' also called auxiliary warp strip con-sisting of original wefts of the cloth and constitutingthe warp for the seam-weaving process performed trans-versely to the actual direction of the wire cloth, is positioned on either side of the wire 16 which is called central wire between the two unravelled ends of the wire cloth 11, said ends being held by the magazining bunches 13, 13'. The central wire 16 is located exactly midway between the two auxiliary warp strips 15, 15'. The auxiliary warp strips and the central wire are secured in a further clamping means 17 of the machine likewise mounted on the stands 4, 4'.
The individual wires of the auxiliary warp as well as the central wire 16 are guided in eyelets of the shedding mechanism or jacquard head 40 disposed either above or below the plane of weaving on the traveling mechanism 1.

, ~
1 Removal and separatiOnO the warp ends 12, 12' (Fig. l) by means of the thread separators 7, 7' is effected in a manner known per se, identical seam forming elements such as thread separators 7, 7', transfer grippers 8, 8', drawing-in grippers 9, 9' and lathes lO, 10' being provided on either side of ~he seam. Initially, the transfer gripper 8' grips the warp separated by the thread separator 7' and swings it downward to the transfer position of the working plane, as will be apparent from Fig. 3. Then the drawing-in gripper 9 takes over the warp end and pulls the warp into the full shed fQrmed by the shedding mechanism 40. Thereupon, the thus in-serted warp end is beaten up to the selvedge by the lathe lO'. Now, theright-hand part of the auxiliary warp strip l5 TOrmS an inner partial shed, as will be apparent from Fig. 4, and the same warp end is swung back by the drawing-in gripper 9 into the specified transfer position, where the drawing-in gripper 9' ~akes over said warp end, while the transfer gripper 8' during the transfer operation functions as 10cating aid by pressing against the warp. The drawing gripper 9' then tensions the warp end, whereupon the lathe 10' is again beaten up. Then the adjacent partial shed is formed in the auxiliary warp half lS', the next warp is moved to the transfer position by the transfer gripper 8' ant inserted by ~he drawing-in gripper 9 into the now outer partial shed as can be seen from Fig. S, whereupon the warp is again beaten up by the lathe 10'.

Since during these operations the central wire 16 does not participate in the change of sheds, the warp ends also do no~ wind around it. This is represented in Fig. 6 by the threads or wires a and b. Subsequently, the above-described s~eps are repeated in the same order with the following wires or threads c and d, but this 1 time the central wire 16 does participate in the change of sheds and thus is includedin the warp loop. Therefore, only every other warp of each cloth end forms a load-bearing warp wire loop 33, 33' capable of transferring longitudinal forces.

Subsequently, the corresponding operations are repeated with the other half 15 of the auxiliary warp strip, wherein this time beating-up is performed by the lathe 10 and the wires or threads e, f and 9, h are inserted as illustrated in Fig. 6. The structure of the two lathes 10, 10' is per se known and will not be explained in detail.

Instead of a single central wire 16 it is also possible to interweave a plurality of insertion wires disposed in parallel side-by-side relationship, for instance two insertion wires 27, 27' as illustrated in Fig. 7, whereby the strength of the seam is improved due to the fact that - in contrast to the seam illustrated in Fig. 6 - all of the warps of the cloth participate in load bearing. The use of two inserted wires especially takes into account the fact that with a frequently used rour-shaft cloth or double-weave cloth, as it is called, the loops are alternatingly long and short because of the natural crimp of the thread, as illustrated schemati-cally in Fig. 7 for a plain cloth. In this case the two cloth ends 15, 15' are offset relative to each other in such a way that a respective long loop 28 of the left-hand wire cloth edge is passed about both inserted wires 27, 27' combined with a short loop 29' of the right-hand wire cloth edge passed about the right-hand inserted wire 27', and a short loop 29 of the left-hand wire cloth edge passed about the left-hand inserted wire 27 is combined with a long loop 28' of the right-hand wire cloth edge which is passed about both inserted wires 27, 27'.

1 In order to fully obtain the advantage of complete seam strength in another way, a modification of the method provides that the warp ends after unravelling of the right-hand and left-hand cloth sides and their stringing in the magazining hank are respectively individually interwoven with a loop 34 of a wire helix 25, each warp end being tied up in th~ helix as illustrated in Fig. 8. In this connection it has been found suitable to guide the wire cloth ends 15, l5' provided with the interwoven helix 25 in a device 18 illustrated in Fig. 9, said device being supported in the traveling mechanism 1 of the seaming machineO This device is particularly necessary when two parallel wire helices 25, 25' are employed, which are respectively associated with a respective side of the wire cloth.
These two wire hel.ices are not interconnected. The left-hand and the right-hand cloth ends are retained in the device 18 by means of guide rollers 19, 2û in such a way that lateral displacement or slipping is prevented.
Then, the wire helices are joined externally of the seaming machine by means of a common inserted wire.

When using a common inserted or central wire, a guiding device of the type illustrated in Fig. 9 is not required, because sufficient positional stability is ensured by the common central wire.

The control system for the above-described seaming machine is designed in such a way that the machine may also weave a wire helix 25 of the kind shown in Fig. 8 into only one cloth side. Finally, it is also possible to interweave the wire helices, which will later be joined by a common inserted wire when the wire cloth is made endless, in the cloth ends together with a wire 26 located in said wire helices (Fig. 10).

1 An alternative embodiment to Fig. 9, replacing the guide rollers 19, 20 with a strong, shedable central wire 21, is shown in Fig. Il. The function of the guide rollers 19, 20 is performed by the central wire 21 by connecting both wire cloth ends 15, 15' and fixing their position relative to the seaming machine.
,'`
The seaming m~chine is useful to provide technical woven cloths, for instance dryer cloths for dehydration ,: lO machines, paper-making machines and board machines of the most varied composition, in warp and weft direction (mono- or multifilament in polyester or polyamide) and single^ or multi-layer structure with insertion-type seams. Likewise, it is possible to provide base fabrics for wet felts in single- or multi-layer configuration with insertion-type seams.

For reasons of affecting the permeab11ity it may sometimes be of advantage when the auxiliary warps in the seam region9 i.e. ~he wefts of the original cloth, consist of a material different from that of the re-maining wefts of the cloth.

~r

Claims (14)

1. A seaming machine, comprising:
a frame;
a machine table supported by said frame;
a supply of cloth, means for separating the ends of said cloth into individual threads;
a plurality of parallel runnung wires extending length-wise along said machine table;
means for transferring said individual threads to said machine table adjacent said wires; and means for weaving said threads with said wires, wherein said means for weaving produces an endless belt cloth.
2. The invention as described in claim 1, comprising in addition a travelling mechanism, said mechanism causing reciprocating motion of said seaming machine in a rhythm consistent with said means for weaving during said weaving.
3. The invention as described in claim 2, wherein said travelling comprises:
a set of wheels supporting said frame; and a gearbreak motor connected to said set of wheels, said motor encouraging reciprocating motion of said frame in both forward and rearward longitudinal directions.
4. The invention as described in claim 3, comprising in addition a disconnect device for disconnecting said motor, said device permitting manual reciprocating movement of said seaming machine.
5. The invention as described in claim 1, wherein said means for separating the ends of said cloth into individual threads comprises a pair of thread separators, said separators dividing singular threads from said cloth at regular intervals.
6. The invention as described in claim 5, wherein said means for transferring said individual threads comprises a pair of transfer grippers, said grippers acting to transfer said individual threads from said thread separators at a given thread tension.
7. The invention as described in claim 6, comprising in addition a holding-down device, said holding device holding said transferred threads in a position above said machine table adjacent said plurality of wires.
8. The invention as described in claim 6, wherein said means for weaving said threads with said wires comprises a pair of threading grippers, said grippers receiving said threads from said transfer grippers.
9. The invention as described in claim 8, comprising in addition a shedding mechanism for weaving said threads with said wires, said threading grippers transferring said threads to said shedding mechanism.
10. The invention as described in claim 9, wherein said shedding mechanism comprises:
a jacquard container for housing said threads to be woven; and a pair of lathes, said lathes operably connected to said transfer and threading grippers, said lathes further causing said threads and wires to be woven together into a selvedge material.
11. The invention as described in claim 10, wherein said plurality of parallel-running wires comprises one or more central wires, said central wires enabling the creation of a variety of woven patterns.
12. The invention as described in claim 10, wherein said shedding mechanism is capable of weaving helix-shape wires with said threads.
13. The invention as described in claim 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 or 12, comprising in addition an electronic control unit mounted on said frame, said electronic unit being programmed to provide various weaving procedures to said weaving machine.
14. The invention as described in claim 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 or 12, comprising in addition a pneumatic control unit mounted on said frame, said pneumatic unit operating said thread separators and said thread transfers and transfer grippers.
CA000605435A 1988-07-13 1989-07-12 Method of manufacturing an insertion-type seam for making a cloth belt endless, and seaming machine Expired - Fee Related CA1318830C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP3823715.6 1988-07-13
DE3823715A DE3823715A1 (en) 1988-07-13 1988-07-13 METHOD FOR THE PRODUCTION OF A STITCH SEAM TO ENDLESS A TEXTILE TAPE AND SEWING MACHINE

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CA1318830C true CA1318830C (en) 1993-06-08

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CA000605435A Expired - Fee Related CA1318830C (en) 1988-07-13 1989-07-12 Method of manufacturing an insertion-type seam for making a cloth belt endless, and seaming machine

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EP (1) EP0350574B1 (en)
JP (1) JPH02264031A (en)
AT (1) ATE93288T1 (en)
CA (1) CA1318830C (en)
DE (2) DE3823715A1 (en)
NO (1) NO891566L (en)

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Publication number Priority date Publication date Assignee Title
US5027483A (en) * 1990-01-31 1991-07-02 Asten Group, Inc. Apparatus for selectively releasing yarns from a fringe
DE19505280C2 (en) * 1995-02-16 1998-08-06 Staeubli Gmbh Method and device for the mechanical production of a seam for making a web of fabric endless

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2126995A1 (en) * 1971-06-01 1973-01-04 Pohl & Co Mesh junction - by leaving warps free at end zones to pass round a removable pin
WO1984000782A1 (en) * 1982-08-20 1984-03-01 Scapa Porritt Ltd Automatic seaming machine
EP0236601B2 (en) * 1986-02-22 1996-09-04 Asten Group Inc. Automatic seaming machine for fabric belts
DE3446941A1 (en) * 1984-12-21 1986-07-03 F. Oberdorfer, 7920 Heidenheim METHOD FOR THE PRODUCTION OF A STITCH SEAM TO ENDLESS A TEXTILE TAPE AND SEWING MACHINE
JPS62299561A (en) * 1986-02-20 1987-12-26 ウイスコンシン・ワイアズ・インコ−ポレ−テツド Apparatus for automatically forming joint to fabric belt

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Publication number Publication date
DE58905307D1 (en) 1993-09-23
DE3823715A1 (en) 1990-01-18
ATE93288T1 (en) 1993-09-15
JPH02264031A (en) 1990-10-26
EP0350574B1 (en) 1993-08-18
NO891566D0 (en) 1989-04-17
NO891566L (en) 1990-01-15
EP0350574A1 (en) 1990-01-17

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