GB2144780A

GB2144780A - Rope for collecting broods of sea molluscs and breeding these molluscs, the process for manufacturing same end devices used

Info

Publication number: GB2144780A
Application number: GB08418740A
Authority: GB
Inventors: Philippe Bonneville; Gerard Mutschler
Original assignee: Boussac Saint Freres BSF SA
Current assignee: Boussac Saint Freres BSF SA
Priority date: 1983-07-25
Filing date: 1984-07-23
Publication date: 1985-03-13
Also published as: SE8403781L; NO843005L; ES280831U; GB8418740D0; IT8467743A1; NL8402262A; DK361284A; IT1179024B; SE8403781D0; DK361284D0; PT78969B; ES280831Y; FR2549695B1; PT78969A; IT8467743A0; FR2549695A1

Abstract

A rope is formed from a single strand (18) or several twisted strands. It comprises at least one false selvedge of weaving (9) twisted with the rope, this false selvedge comprising a woven band (6a) and a fringe (7a) of free weft or warp threads or narrow strips coming from this woven band and edging one side thereof, the false selvedge being associated with the rope (21) by its woven band (6a) so that said free threads or narrow strips form hairs around the rope. The false selvedges are manufactured industrially by cutting a special cloth comprising woven longitudinal bands alternating with longitudinal bands of weft threads or narrow strips free of warp threads or narrow strips. The false selvedges are associated with the strands so as to obtain a shaggy rope, by using either a stranding machine, (12,14,15,17) then a twisting machine, or a stranding-twisting machine, a guide (19) for feeding the false selvedge onto the strands being provided in each case. <IMAGE>

Description

SPECIFICATION Rope for collecting broods of sea molluscs and breeding these molluscs, the process for manufacturing same and devices used Background of the invention The use of ropes is known for collecting broods of sea molluscs and for breeding these molluscs, such as oysters, mussels, etc... These ropes may be made from natural fibers (vegetable or animal), artificial fibers (for example cellulose xanthate, cellulose acetate) or synthetic fibers (different plastic materials). These ropes may comprise one or more strands, generally one to three.

Summary of the invention The present invention provides an improved rope of this type comprising at least one false woven selvedge or edge twisted or laid with the rope, this false selvedge comprising a woven strip and a fringe of free weft or warp threads or narrow strips coming from this woven strip and edging one side thereof, the false selvedge being associated with the rope by its woven strip so that said free threads or narrow strips form hairs around the rope.

The false selvedge may then be made from threads, or narrow strips possibly ribbed, the ribs being favorable for breeding oysters. The threads and the narrow strips are advantageously made from a plastic material, for example polyethylene, polypropylene, polyester, polyamide or any other thermoplastic material capable of forming hairs around the rope.

In a preferred embodiment for the industrial manufacture of said shaggy rope, the fringe of the false selvedge is made from weft threads or narrow strips.

In a first embodiment of the shaggy rope, one at least of the strands which form it is covered with a false woven selvedge which is wrapped around the strand by means of its woven strip so that said free threads or narrow strips form hairs around the strand and the rope formed with this strand.

Generally, such a rope comprises one to three shaggy strands and 0 to 2 bare strands, twisted together if the rope comprises more than one strand.

In a second embodiment of the shaggy rope, at least one false selvedge is incorporated in the rope by means of its woven strip so that said free threads or narrow strips form hairs around the rope.

By way of indication, and without these data being in any wise limitative, the diameter of the non shaggy section of the rope may be between 8 and 25 mm, preferably between 10 and 14 mm and the false selvedge may be formed from a woven strip of a width of about 1 to 5 cm, preferably from 1.5 to 2 cm, and a fringe of about 3 to 10 cm, preferably 5 cm.

The advantages of the improved rope are the fol lowing the hairs with which it is covered increase the brood collecting surface, form a favorable medium for this collection by imitating sea weed and creating a calm and protective zone, they promote clinging of the molluscs during their growth up to maturity, without it being necessary to use conventional processes (nets etc...) and they are therefore labor saving for the breeding (this saving could reach 40%).

The present invention also relates to processes for the industrial manufacture of said shaggy rope.

In a first process, starting with one or more strands formed in a stranding machine, a cloth is manufactured comprising woven longitudinal bands alternating with longitudinal bands of weft threads or narrow strips free of warp threads or narrow strips, this cloth is cut parallel to the warp in the region of the woven longitudinal bands and in the region of the longitudinal bands of weft threads or narrow strips, which provides false selvedges of weaving comprising a woven band and a fringe of free weft threads or narrow strips, which false selvedges are pulled on leaving the loop by rubber covered pulling cylinders which deposit the false selvedges in spinning cans for storage thereof, from these cans a false selvedge is associated with a strand formed in a stranding machine, the strand, after passing through the spinneret of the machine,receiving the false selvedge so that the latter is rolled on the strand by its woven band, under the effect of the twist and the driving movement to which the strand is subjected in the stranding machine, which provides a shaggy strand and, if the rope is to comprise several strands, at least two strands are twisted in a twisting machine from which the strand guide and the spinneret have been removed and in which only the pulley-blocks are eventually partially used, one at least of the strands being a shaggy strand such as obtained previously.

Manufacture may also be achieved in two ways from strands formed in the stranding zone of a stranding-twisting machine.

In a second process, a cloth is manufactured comprising woven longitudinal bands alternating with longitudinal bands of weft threads or narrow strips free of warp threads or narrow strips, this cloth is cut parallel to the warp in the region of the woven longitudinal bands and in the region of the longitudinal bands of weft threads or narrow strips, which provides false selvedges or weaving comprising a woven band and a fringe of free weft threads or narrow strips, which false selvedges are drawn on leaving the loom by rubber covered pulling cylinders which deposit the false selvedges in spinning cans for storage thereof, at least one false selvedge is introduced, from these cans, into the stranding-twisting machine, at the twisting point of the machine where the strands are joined together so that the false selvedge is associated with the twisted strands, by its woven band, and is twisted conjointly therewith under the effect of the twisting and driving movement to which the strands are subjected in the twisting zone of the strandingtwisting machine, which provides a shaggy rope.

In a third process, a cloth is manufactured comprising woven longitudinal bands alternating with longitudinal bands of weft threads or narrow strips free of warp threads or narrow strips, this cloth is cut parallel to the warp in the region of the woven longitudinal bands and in the region of the longitudinal bands of weft threads or narrow strips, which provides false selvedges of weaving comprisins a woven band and a fringe of free weft threads or narrow strips, which false selvedges are drawn on leaving the loom by rubber covered pulling cylinders which deposit the false selvedges in spinning cans for storage thereof, at least one false selvedge, which has been rewound, is fed into the feeding case of the stranding-twisting machine just like the picks (yarns groups) forming the strand or strands, so that at least one false selvedge is associated by its woven band with one at least of the strands formed and is twisted conjointly therewith under the effect of the twisting and driving movement to which the strands are subjected in the stranding then twisting zone of the stranding-twisting machine, which provides a shaggy rope.

In the three cases, the false selvedge is preferably guided in its path towards the strand or strands.

According to these processes, said cloth comprises a regular weft and bands free of warp threads or narrow strips, since present day looms are designed for manufacturing cloths of great length in the warp direction and of limited width in the weft direction and since it would not be logical to reverse the construction of the woven bands, but this reversal, although not rational and not very economic, is possible.

The loom used may be a straight loom or a circular loom.

Cutting of the cloth in the region of the woven bands is advantageously effected by thermofusion, which causes welding of the warp and weft threads or narrow strips along the cut and thus strengthens the edge deprived of the fringe of false selvedges obtained. Cutting in the region of the weft threads or narrow strips is performed mechanically by means of scissors or a cutting blade.

This mechanical cutting leaves the end of the weft threads or narrow strips free.

The process of the invention for manufacturing false selvedges allows these selvedges to be obtained industrially with optimal dimensions for associating them with the strands or incorporating them in ropes depending on the twisting pitch of the strand or rope and, consequently, depending on the flexibility of the rope, itself depending on the use thereof, and with an optimum shaggy surface.

The invention finally provides devices for implementing the above described processes. In the case of the first process, the device comprises a stranding machine and a twisting machine and is provided with a guide for feeding the false selvedge onto the strand, this guide being fixed to the stranding machine in the vicinity of the spinneret thereof, and the twisting machine is without strand guide and spinneret, but keeps its pulley-blocks, which are possibly partially used.In the case of the second process, the device comprises a strandingtwisting machine and has at least one guide for feeding the false selvedge to the twisting point of the machine where the strands are joined together, this guide being fixed to the stranding-twisting machine in the vicinity of said twisting point, and the twisting part if the machine is without spinneret, but keeps its pulley-blocks, which are possibly partially used.In the case of the third process, the device comprises a stranding-twisting machine and at least one of the reels mounted on the spindles of the feeding cage of the stranding-twisting machine carries a rolled false selvedge, at least one guide for feeding the false selvedge towards one at least of the stranding points where the picks are joined rogether is mounted in the stranding part of the machine, said stranding point is moved so as to allow installation of the false selvedge feed guide and the twisting part of the machine is without spinneret, but keeps its pulley-blocks, which are possibly partially used. The guide may be a tube, a spout, a simple inclined plane, sets of brushes further providing a braking effect, or any other suitable device.

Brief description of the drawings A particular embodiment of the invention will be described hereafter, by way of example which is purely indicative and in no wise limiting, with reference to the accompanying drawings in which: Figure 1 is a partial top view of the woven cloth, from which false selvedges will be cut out, Figure 2 is a partial double scale top view of a false selvedge cut out from the cloth shown in Figure 1, and Figure 3 is a schematical and partial perspective view of a stranding machine supplying a shaggy strand.

Description of the preferred embodiments Figure 1 shows the special woven cloth 8 from which the false selvedges of weaving 9 (figure 2) will be cut out. This special cloth comprises relatively wide longitudinal bands 7 which are free of warp threads or narrow strips 1 and woven longitudinal bands 6 comprising both these warp threads or narrow strips 1 and weft threads or narrow strips 2. Arrow 3 shows the forward movement of the cloth on the loom, which may be a strainght loom or a circular loom. Weaving is of the cloth weave type with multiple bands 6.

For forming false selvedges of weaving 9, cloth 8 is cut parallel to the warp in the woven longitudinal bands 6, for example in the middle of these bands, by means of a thermofusion cutting device shown schematically at 4, and the cloth is cut parallel to the warp in the longitudinal bands 7 of weft threads free of warp threads, for example in the middle of these bands, by means of a mechanical cutting device shown schematically at 5 and which may be formed by scissors or by a cutting blade, or any other cold cutting device. On the false selvedges 9 obtained, the weft and warp threads or narrow strips are welded along the free edge 10 of the woven band 6a of the false selvedge and the end of the weft threads or narrow strips of the fringe 7a of the same is left free.

Cutting of cloth 8, simultaneously by means of an appropriate number of cutting devices 4 and 5, rapidly provides a large number of false selvedges 9.

In Figure 3 can be seen a stranding machine adapted for manufacturing a shaggy strand. The elementary picks 11, twisted or not, which will form the strand, pass through a fixed grid 12 and are assembled together at the stranding point 13 by a fixed spinneret 14 mounted on the frame 15 of the stranding machine. The strand is driven in the direction of arrow 16 in a conventional way by at least one revolution of the pulley-block, whose drive pinion 17 only is shown, mounted for rotation on frame 15. The strand passes through the center of said control pinion, passes once round the pulley-block at least, then is wound on a take up reel not shown, whose rotation in two perpendicular directions provides both driving and spooling of the strand and twisting of the picks which form it, all this in a conventional way.

According to the invention, a false selvedge 9 is associated with strand 18 leaving the spinneret,14.

It passes through a guide tube 19 fixed to frame 15 of the stranding machine in the vicinity of spinneret 14 and it is rolled on the strand 18 by its woven band 6a, in front of the spinneret 14. It is driven in the direction of arrow 16 and twisted in the direction of arrow 20 (a left hand twist called S (or inversely)) at the same time as the picks of strand 18, which windsit around this latter. The fringe 7a of free weft threads or narrow strips forms the hairs 22 of the shaggy strand 21, which continues its path in the stranding machine as mentioned above, in the same way as a non shaggy strand except that, taking into account the presence of the hairs, this strand can only pass once eventually around the pulley-block, instead of several times as usual. This shaggy strand 21 may itself be used as rope.

For manufacturing a shaggy rope comprising several strands, one at least of which is shaggy and some of which may be bare, the strands are fed into a twisting machine not shown, which is adapted to the shaggy strands, while not using the strand guide and removing the spinneret and using the pulley-blocks wholly or partially. The twisting required for twisting the strands is obtained in a way known per se, depending on the type of twisting machine, either by a rotation in two perpendicular directions of the cable take up spool, or by rotation in two perpendicular directions of the spools from which the strands are wound off for feeding the twisting machine.

It is also possible to use a single stranding-twisting machine known per se and not shown. In a first case, with this machine, several non shaggy strands are formed in its stranding zone, then one or more false selvedges are asociated with these strands by feeding them to the twisting point of the machine situated at the beginning of the twisting zone thereof and where the strands converge, the false selvedges then being incorporated in the final rope under the effect of the pull and of the twist to which the strands are subjected in said twisting zone.In a second case, with this machine, one or more strands are formed in its stranding zone while associating at least one false selvedge with one at least of these strands, the false selvedge being fed to the stranding point of the machine situated at the beginning of the stranding zone thereof and where the elementary picks converge, the false selvedge or selvedges then being incorporated with the strand or strands under the effect of the pull and of the twisting to which the strands are subjected in the successive stranding and twisting zones.

Other modifications within the field of technical equivalents may be made not only to the shaggy rope of the invention but also to the devices used for forming it, without for all that departing from the scope and spirit of the invention.

Coilecting molluscs as well as breeding them by using the present shaggy rope may take place on the following devices 1. Shaggy ropes stretched between two stakes in a sea medium, 2. Fishing hurdles (shaggy ropes wound on large diameter piles and partially submerged), 3. Tables fixed above the water and from which the shaggy ropes hang, 4. Rafts under which the shaggy ropes hang, 5. Float lines (for example of the Japanese float line type); these are floats joined together by hawsers (thick ropes), the whole bearing the shaggy ropes which plunge into the water.

These devices provide for collecting and breeding, in the sea (coastal zone or out at sea) or in ponds, more especially of the following sea molluscs : oysters, mussels, scallops etc...

Claims

1. A rope for collecting and breeding molluscs comprising one or more rope strands and at least one fringed member twisted with said rope strand or strands, said fringed member comprising an elongate web having a fringe extending from a long edge thereof.

2. A rope as claimed in claim 1 wherein the web is a woven band.

3. A rope as claimed in claim 2 wherein the fringe is formed by extending warps or wefts.

4. A rope as claimed in claim 3 wherein the warps and/or the wefts are threads or narrow strips.

5. A rope for collecting broods of sea molluscs and breeding those molluscs, said rope being formed of a single strand or of several twisted strands and comprising at least one false selvedge of weaving twisted with the rope, this false selvedge comprising a woven band and a fringe of free weft or warp threads or narrow strips coming from this band and edging one side thereof, the false selvedge being associated with the rope by its woven band so that said free threads or narrow strips form hairs around the rope.

6. Rope according to claim 5, wherein the false selvedge of weaving is made from narrow ribbed strips.

7. Rope according to claim 5 or claim 6, wherein the threads or narrow strips of the false selvedge are made from a thermoplastic material.

8. Rope according to any one of claims 5 to 7, Owherein said fringe of the false selvedge is made from weft threads or narrow strips.

9. Rope according to any one of claims 5 to 8, wherein one at least of the strands is covered with a false selvedge of weaving which is wound about the strand by its woven band so that said free threads or narrow strips form hairs around the strand and the rope formed with this strand.

10. Rope according to claim 9, comprising one to three shaggy strands and 0 to 2 bare strands, twisted together if the rope comprises more than one strand.

11. Rope according to any one of claims 5 to 8, wherein at least one false selvedge is incorporated in the rope by its woven band so that said free threads or narrow strips form hairs aroundd the rope.

12. Process for the industrial manufacture of a rope according to claim 9 or 10, from one or more strands formed in a stranding machine, wherein a cloth is formed comprising woven longitudinal bands alternating with longitudinal bands of weft threads or narrow strips free of warp threads or narrow strips, this cloth is cut parallel to the warp in the region of the woven longitudinal bands and in the region of the longitudinal bands of weft threads or narrow Strips, which provides false selvedges of weaving comprising a woven band and a fringe of free weft threads or narrow strips, a false selvedge is associated with a strand formed in a stranding machine, the strand, after passing through the spinneret of the machine, receiving the false selvedge so that the latter is wrapped around the strand by its woven band under the effect of the twisting and the driving movement to which the strand is subjected in the stranding maShine, which provides a shaggy strand and if the rope is to comprise several strands, at least two strands are twisted in a twisting machine having pulley blocks but without strand guide and without spinneret and of which only the pulley-blocks are possibly partially used, one at least of said strands being a shaggy strand such as obtained previously.

13. Process for the industrial manufacture of the rope according to claim 11, from strands formed in the stranding zone of a stranding-twisting machine, wherein a cloth is formed comprising woven longitudinal bands alternating with longitudinal bands of weft threads or narrow strips free of warp threads or narrow strips, which provides false selvedges of weaving comprising a woven band and a fringe of free (weft threads or narrow strips, and at least one false selvedge is introduced into the stranding-twisting machine at the twisting point in the machine where the strands are joined together, so that the false selvedge is associated with the twisted strands by its woven band and is twisted conjointly therewith under the effect of the twisting and driving movement to which the strands are subjected in the twisting zone of the stranding-twisting machine, which provdes a shaggy rope.

14. Process for the industrial manufacture of the rope according to claim 9 or 10 from strands formed in the stranding zone of a stranding-twisting machine, wherein a cloth is formed comprising woven longitudinal bands alternating with longitudinal bands of weft threads or narrow strips free of warp threads or narrow strips, this cloth is cut parallel to the warp in the region of the woven longitudinal bands and in the region of the longitudinal bands of weft threads or narrow Strips, which provides false selvedges of weaving comprising a woven band and a fringe of free weft threads or narrow strips, which false selvedges are pulled on leaving the loom by rubber pulling cylinders which deposit the false selvedges in spinning cans for storage thereof, at least one false selvedge, which has been respooled, is fed into the feeding cage of the stranding-twisting machine in the same way as the picks forming the strand or strands, so that at least one false selvedge is associated by its woven band with one at least of the strands formed and is twisted conjointly therewith under the effect of the twisting and the driving movement to which the strands are subjected in the stranding then twisting zone of the stranding-twisting machine, which provides a shaggy rope.

15. Process according to any one of claims 12 to 14, wherein the false selvedge is guided in its path, before coming into contact with the strand or strands.

16. Process according to any one of claims 12 to 15, in which the false selvedge is made from thermoplastic threads or narrow strips, wherein said cloth is cut by thermofusion in the region of the woven longitudinal bands, the weft and warp threads or narrow strips at the free edge of the woven band of a false selvedge being thus welded, and in that said cloth is cut mechanically in the region of the longitudinal bands of weft threads or narrow strips, which leaves the cut end of the threads or narrow strips free.

17. Device for implementing the process according to claim 12, comprising a stranding machine and a twisting machine, wherein the device is provided with a guide for feeding the false selvedge onto the strand, this guide being fixed to the stranding machine in the vicinity of the spinneret thereof, and wherein the twisting machine is without strand guide and without spinneret, but keeps its pulley blocks.

18. Device for implementing the process according to claim 13, comprising a stranding-twisting machine, provided with at least one guide for feeding the false selvedge to the twisting point of the machine where the strands are joined together, this guide being fixed to the stranding-twisting machine in the vicinity of said twisting point, and the twisting part of the machine is without spinneret, but keep its pulley blocks.

19. Device for implementing the process according to claim 14, comprising a stranding-twisting machine, wherein, one at least of the spools mounted on the spindles of the feeding cage of the stranding-twisting machine carries a rolled up false selvedge, at least one guide for feeding the false selvedge to one at least of the stranding points where the picks are joined together is mounted in the stranding part of the machine, said stranding point is moved so as to allow installation of the false selvedge feed guide, and the twisting part of the machine is without spinneret, but keeps its pulley blocks.

20. A rope for collecting and breeding molluscs substantially as hereinbefore described with reference to and as illustrated in the accompanying drawing.

21. A process for producing a rope for collecting and breeding molluscs substantially as hereinbefore described with reference to the accompanying drawing.

22. A device for use in producing a rope as claimed in claim 1 substantially as hereinbefore described.