FR2903627A1 - Manufacturing a chain constituted of assembly of mesh with plastic material, comprises blending a mesh, assembling another mesh by passing it through a gap obtained by blending, and maintaining a shape of material at a level of blending - Google Patents

Manufacturing a chain constituted of assembly of mesh with plastic material, comprises blending a mesh, assembling another mesh by passing it through a gap obtained by blending, and maintaining a shape of material at a level of blending Download PDF

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Publication number
FR2903627A1
FR2903627A1 FR0652969A FR0652969A FR2903627A1 FR 2903627 A1 FR2903627 A1 FR 2903627A1 FR 0652969 A FR0652969 A FR 0652969A FR 0652969 A FR0652969 A FR 0652969A FR 2903627 A1 FR2903627 A1 FR 2903627A1
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FR
France
Prior art keywords
mesh
blending
manufacturing
plastic material
assembly
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.)
Pending
Application number
FR0652969A
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French (fr)
Inventor
Piero Paita
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Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to FR0652969A priority Critical patent/FR2903627A1/en
Publication of FR2903627A1 publication Critical patent/FR2903627A1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/4895—Solvent bonding, i.e. the surfaces of the parts to be joined being treated with solvents, swelling or softening agents, without adhesives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/114—Single butt joints
    • B29C66/1142—Single butt to butt joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/431—Joining the articles to themselves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/432—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms
    • B29C66/4324—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms for making closed loops, e.g. belts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/526—Joining bars
    • B29C66/5268—Joining bars characterised by their solid cross sections being non-circular, e.g. being elliptical, square or rectangular
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D99/00—Subject matter not provided for in other groups of this subclass
    • B29D99/0082—Producing articles in the form of closed loops, e.g. rings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2001/00—Use of cellulose, modified cellulose or cellulose derivatives, e.g. viscose, as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2001/00—Use of cellulose, modified cellulose or cellulose derivatives, e.g. viscose, as moulding material
    • B29K2001/08—Cellulose derivatives
    • B29K2001/12—Cellulose acetate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/12—Chains
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/709—Articles shaped in a closed loop, e.g. conveyor belts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/709—Articles shaped in a closed loop, e.g. conveyor belts
    • B29L2031/7096—Rings or ring-like articles

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Adornments (AREA)

Abstract

The process for manufacturing a chain constituted of assembly of mesh with plastic material, comprises blending a mesh (1), assembling another mesh (4) by passing it through a gap (2) obtained by blending, maintaining a shape of the material at the level of blending, introducing a sufficient quantity of solvent (2) adapted to the plastic material in the gap, joining two sections (6, 7) of the mesh till solidarization, and maintaining the joined sections.

Description

1 La présente invention a pour objet un procédé de fabrication d'uneThe subject of the present invention is a method of manufacturing a

chaîne constituée de l'assemblage de maillons réalisés en une matière plastique. On connaît des chaînes faites de l'assemblage de maillons en matière plastique utilisées dans des applications très différentes, que ce soit dans le domaine de mode, par exemple celui des bijoux de fantaisie ou celui de la maroquinerie, ou dans le domaine de la sécurité pour permettre de délimiter une zone.  chain consisting of the assembly of links made of a plastic material. There are known chains made of the assembly of plastic links used in very different applications, whether in the field of fashion, for example that of costume jewelry or that of leather goods, or in the field of security to allow to delimit an area.

Ces chaînes sont fabriquées selon des procédés très variés. On connaît ainsi les chaînes moulées en continu, ce qui nécessite un matériel spécifique coûteux, et qui ne permet pas d'atteindre un résultat d'une grande précision, en sorte que les chaînes ainsi fabriquées sont utilisées pour délimiter une zone, sur un chantier par exemple. On connaît également les chaînes venant de l'assemblage de maillons ouverts, en forme de C, qui présentent l'avantage d'un assemblage rapide et aisé, mais qui par contre sont peu esthétiques et peu solides.  These chains are manufactured according to a variety of processes. Thus, the continuous molded chains are known, which requires an expensive specific material, and which does not make it possible to achieve a result of great precision, so that the chains thus manufactured are used to delimit an area, on a building site. for example. Also known are the chains from the assembly of open links, C-shaped, which have the advantage of a quick and easy assembly, but on the other hand are unattractive and unsightly.

On connaît également les maillons fermés, tronçonnés pour créer une ouverture permettant de faire passer un autre maillon, puis éventuellement soudés. Les chaînes ainsi fabriquées sont plus solides et mais sont d'un usage limité dans le domaine de l'esthétique, du fait notamment de la soudure apparente, surtout lorsque les maillons ne sont pas unis, mais présentent des motifs décoratifs. La présente invention a pour but de proposer un procédé de fabrication d'une chaîne constituée de l'assemblage de maillons en une matière plastique, qui permet d'obtenir une chaîne très résistante, sans rupture de l'uniformité d'aspect. Le procédé de fabrication d'une chaîne constituée de l'assemblage de maillons en une matière plastique selon l'invention, se caractérise en ce qu'il consiste à couper un maillon, à assembler un autre maillon en le faisant passer par la fente obtenue par la coupe, puis à attendre la reprise de forme de la matière, notamment au niveau du trait de coupe, puis 2903627 2 à introduire dans ladite fente une quantité suffisante de l'un des solvants adaptés à ladite matière plastique, enfin à abouter les deux tronçons jusqu'à solidarisation. On a pu constater que l'application de ce procédé permet 5 d'obtenir une chaîne dont les maillons sont uniformes, et ne présentent aucune trace de l'opération de coupe. Ce résultat est également obtenu lorsque les maillons présentent des motifs décoratifs. Selon une caractéristique additionnelle du procédé de 10 fabrication d'une chaîne selon l'invention, on maintient les deux tronçons aboutés jusqu'à solidarisation. Après le dépôt du solvant, selon la matière plastique utilisée, et également selon la section de l'anneau, la mémoire de forme de l'anneau peut ne pas être suffisante, il est alors 15 nécessaire de réaliser le maintien des deux tronçons, Selon une autre caractéristique additionnelle du procédé de fabrication d'une chaîne selon l'invention, on coupe un maillon sur deux de la chaîne. En effet, par exemple, une chaîne des quatre maillons peut 20 être réalisée au moyen d'au minimum deux maillons coupés. Selon un mode opératoire préférentiel du procédé selon l'invention, la matière plastique consiste en de l'acétate de cellulose, tandis que le solvant consiste en de l'acétone. Le procédé de fabrication d'une chaîne selon l'invention 25 est utilisable quelle que soit la forme des maillons, celle-ci pouvant être ronde, carrée, rectangulaire, torsadée, et également quelle que la forme de la section de l'anneau. Les avantages et les caractéristiques du procédé selon l'invention, ressortiront plus clairement de la description qui 30 suit et qui se rapporte au dessin annexé, lequel en représente un mode de réalisation non limitatif. Dans le dessin annexé, les figures 1, 2 et 3 représentent des vues schématiques d'étapes successives du procédé selon l'invention.  Closed links are also known, cut to create an opening for passing another link, and optionally welded. The chains thus manufactured are more solid and are of limited use in the field of aesthetics, especially because of the apparent solder, especially when the links are not united, but have decorative motifs. The present invention aims to provide a method of manufacturing a chain consisting of the assembly of links of a plastic material, which allows to obtain a very strong chain, without breaking the uniformity of appearance. The method of manufacturing a chain consisting of the assembly of links of a plastic material according to the invention, is characterized in that it consists of cutting a link, to assemble another link by passing it through the slot obtained by cutting, then waiting for the recovery of shape of the material, especially at the cutting line, then 2903627 2 to introduce into said slot a sufficient amount of one of the solvents adapted to said plastic material, finally to abut the two sections until joining. It has been found that the application of this method makes it possible to obtain a chain whose links are uniform, and show no trace of the cutting operation. This result is also obtained when the links have decorative patterns. According to an additional feature of the method of manufacturing a chain according to the invention, the two abutting sections are held together until they are secured. After the deposition of the solvent, depending on the plastic used, and also according to the section of the ring, the shape memory of the ring may not be sufficient, it is then necessary to maintain the two sections, another additional characteristic of the method of manufacturing a chain according to the invention is cutting one link in two of the chain. Indeed, for example, a chain of four links can be achieved by means of at least two cut links. According to a preferred procedure of the process according to the invention, the plastic consists of cellulose acetate, while the solvent consists of acetone. The method of manufacturing a chain according to the invention is usable whatever the shape of the links, the latter being round, square, rectangular, twisted, and also whatever the shape of the section of the ring. The advantages and characteristics of the process according to the invention will become more clearly apparent from the description which follows and which refers to the appended drawing, which represents a non-limiting embodiment thereof. In the accompanying drawing, Figures 1, 2 and 3 show schematic views of successive steps of the method according to the invention.

2903627 3 Sur la figure 1, on peut voir un anneau 1, réalisé en une matière plastique, de l'acétate de cellulose par exemple, dans lequel on pratique une fente 2 au moyen d'un outil tranchant 3. On notera que le l'outil tranchant 3 est de préférence 5 prévu apte à réaliser une fente rectiligne, mais il est parfaitement possible de prévoir d'autres formes. Sur la figure 2, après ouverture de l'anneau 1 au niveau la fente 2, on y a introduit un anneau 4. Puis, après reprise de forme de la matière plastique, aux niveau de la coupe, on dépose 10 dans la fente 2 une quantité de solvant 5, lequel consiste en l'un de ceux adaptés à la matière plastique dont est fait l'anneau 1. Ainsi, dans le cas d'acétate de cellulose, le solvant 5 est préférentiellement de l'acétone.In FIG. 1, a ring 1, made of a plastic material, for example cellulose acetate, in which a slot 2 is made by means of a cutting tool 3, can be seen. The cutting tool 3 is preferably provided capable of producing a straight slot, but it is perfectly possible to provide other shapes. In FIG. 2, after opening of the ring 1 at the level of the slot 2, a ring 4 is introduced into it. Then, after recovery of the shape of the plastic, at the level of the section, 10 is deposited in the slot 2 a quantity of solvent 5, which consists of one of those adapted to the plastic material of which ring 1 is made. Thus, in the case of cellulose acetate, the solvent 5 is preferably acetone.

15 Il suffit ensuite d'abouter les deux tronçons 6 et 7 pour obtenir au final, comme cela est visible sur la figure 3, un anneau 1 reconstitué, associé à l'anneau 4 et constituant ainsi le début d'une chaîne 8, et sans laisser apparaître de trace de la fente 2.It is then sufficient to abut the two sections 6 and 7 to obtain finally, as can be seen in FIG. 3, a reconstituted ring 1, associated with the ring 4 and thus constituting the beginning of a chain 8, and without leaving any trace of the slot 2.

20 L'aboutement des deux tronçons 6 et 7 peut se faire naturellement, par la mémoire de forme de l'anneau 1, mais il peut être nécessaire de réaliser une opération de maintien.The abutment of the two sections 6 and 7 can be done naturally, by the shape memory of the ring 1, but it may be necessary to perform a holding operation.

Claims (4)

REVENDICATIONS 1) Procédé de fabrication d'une chaîne (8) constituée de l'assemblage de maillons (1, 4) en une matière plastique, caractérisé en ce qu'il consiste à couper un maillon (1), à assembler un autre maillon (4) en le faisant passer par la fente (2) obtenue par la coupe, puis à attendre la reprise de forme de la matière, notamment au niveau du trait de coupe, puis à introduire dans ladite fente (2) une quantité suffisante de l'un des solvants (5) adaptés à ladite matière plastique, enfin à abouter les deux tronçons (6, 7) jusqu'à solidarisation.  1) A method of manufacturing a chain (8) consisting of the assembly of links (1, 4) of a plastic material, characterized in that it consists of cutting a link (1), to assemble another link ( 4) by passing it through the slot (2) obtained by cutting, then waiting for the recovery of shape of the material, in particular at the level of the cut line, and then introducing into said slot (2) a sufficient quantity of the one of the solvents (5) adapted to said plastic material, finally to abut the two sections (6, 7) until joining. 2) Procédé de fabrication selon la revendication 1, caractérisé en ce que l'on maintient les deux tronçons aboutés jusqu'à solidarisation  2) The manufacturing method according to claim 1, characterized in that one maintains the two butted sections until solidarization 3) Procédé de fabrication selon la revendication 1 ou la revendication 2, caractérisé en ce que l'on coupe un maillon (1) 15 sur deux de la chaîne (8).  3) A manufacturing method according to claim 1 or claim 2, characterized in that one cut one link (1) 15 on two of the chain (8). 4) Procédé de fabrication selon l'une quelconque des revendications précédentes, caractérisé en ce que la matière plastique consiste en de l'acétate de cellulose, tandis que le solvant consiste en de l'acétone.  4) A method of manufacture according to any one of the preceding claims, characterized in that the plastic consists of cellulose acetate, while the solvent consists of acetone.
FR0652969A 2006-07-13 2006-07-13 Manufacturing a chain constituted of assembly of mesh with plastic material, comprises blending a mesh, assembling another mesh by passing it through a gap obtained by blending, and maintaining a shape of material at a level of blending Pending FR2903627A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR0652969A FR2903627A1 (en) 2006-07-13 2006-07-13 Manufacturing a chain constituted of assembly of mesh with plastic material, comprises blending a mesh, assembling another mesh by passing it through a gap obtained by blending, and maintaining a shape of material at a level of blending

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0652969A FR2903627A1 (en) 2006-07-13 2006-07-13 Manufacturing a chain constituted of assembly of mesh with plastic material, comprises blending a mesh, assembling another mesh by passing it through a gap obtained by blending, and maintaining a shape of material at a level of blending

Publications (1)

Publication Number Publication Date
FR2903627A1 true FR2903627A1 (en) 2008-01-18

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FR0652969A Pending FR2903627A1 (en) 2006-07-13 2006-07-13 Manufacturing a chain constituted of assembly of mesh with plastic material, comprises blending a mesh, assembling another mesh by passing it through a gap obtained by blending, and maintaining a shape of material at a level of blending

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FR (1) FR2903627A1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1670758A (en) * 1923-08-01 1928-05-22 Colonial Trust Co Method of making ring-gear blanks
US2432870A (en) * 1944-02-25 1947-12-16 George J Evalt Plastic ring and method of making the same
US3278356A (en) * 1963-05-31 1966-10-11 Katz Daniel Method for fastening perforated propellant sticks to a suspension plate
US3427801A (en) * 1964-08-11 1969-02-18 Indiana General Corp Cast chains
FR2029944A5 (en) * 1969-01-31 1970-10-23 Soto Ange Injection moulded plastics chains

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1670758A (en) * 1923-08-01 1928-05-22 Colonial Trust Co Method of making ring-gear blanks
US2432870A (en) * 1944-02-25 1947-12-16 George J Evalt Plastic ring and method of making the same
US3278356A (en) * 1963-05-31 1966-10-11 Katz Daniel Method for fastening perforated propellant sticks to a suspension plate
US3427801A (en) * 1964-08-11 1969-02-18 Indiana General Corp Cast chains
FR2029944A5 (en) * 1969-01-31 1970-10-23 Soto Ange Injection moulded plastics chains

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