FR2474951A1 - Coated pressed moulding mfr. - by hot press operation of veneer on curved base element - Google Patents

Coated pressed moulding mfr. - by hot press operation of veneer on curved base element Download PDF

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Publication number
FR2474951A1
FR2474951A1 FR8015570A FR8015570A FR2474951A1 FR 2474951 A1 FR2474951 A1 FR 2474951A1 FR 8015570 A FR8015570 A FR 8015570A FR 8015570 A FR8015570 A FR 8015570A FR 2474951 A1 FR2474951 A1 FR 2474951A1
Authority
FR
France
Prior art keywords
veneer
base element
decorative layer
article
compression
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.)
Granted
Application number
FR8015570A
Other languages
French (fr)
Other versions
FR2474951B1 (en
Inventor
Edmund Munk
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.)
Furnier und Sperrholzwerk JF Werz Jr KG Werzalit Pressholzwerk
Original Assignee
Furnier und Sperrholzwerk JF Werz Jr KG Werzalit Pressholzwerk
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 Furnier und Sperrholzwerk JF Werz Jr KG Werzalit Pressholzwerk filed Critical Furnier und Sperrholzwerk JF Werz Jr KG Werzalit Pressholzwerk
Publication of FR2474951A1 publication Critical patent/FR2474951A1/en
Application granted granted Critical
Publication of FR2474951B1 publication Critical patent/FR2474951B1/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27D—WORKING VENEER OR PLYWOOD
    • B27D1/00—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
    • B27D1/04—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring to produce plywood or articles made therefrom; Plywood sheets
    • B27D1/08—Manufacture of shaped articles; Presses specially designed therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
    • B32B21/04—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N7/00—After-treatment, e.g. reducing swelling or shrinkage, surfacing; Protecting the edges of boards against access of humidity
    • B27N7/005—Coating boards, e.g. with a finishing or decorating layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/30—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer formed with recesses or projections, e.g. hollows, grooves, protuberances, ribs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C5/00—Processes for producing special ornamental bodies
    • B44C5/04—Ornamental plaques, e.g. decorative panels, decorative veneers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B2038/0052—Other operations not otherwise provided for
    • B32B2038/0076—Curing, vulcanising, cross-linking
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/04—Punching, slitting or perforating
    • B32B2038/045—Slitting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2317/00—Animal or vegetable based
    • B32B2317/16—Wood, e.g. woodboard, fibreboard, woodchips

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Manufacturing & Machinery (AREA)
  • Forests & Forestry (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)

Abstract

Pressed mouldings with a three-dimensional curvature, e.g. curved lids of boxes, are made of a base element, consisting of chips of fibrous materials with a thermosetting binder, and an outer decorative layer, e.g. a hardwood veneer. The veneer plate has slits or cut-outs at the ends and is laid on the base element which has been moulded by cold pressing. The edges of the slits or cut-outs receive an adhesive coating and the operation is completed by a hot press technique. This results in a firm joint between base element and veneer and retains the uniform pattern of any decorative graining in the veneer.

Description

PROCEDE DE REVETEMENT POURARTICLEN
FORMES PAR COMPRESSION.POURARTICLEN COATING PROCESS
COMPRESSION SHAPES.

L'invention a pour objet un procédé permettant de recouvrir par une couche décorative constituée, par exemple par un contreplaqué de bois précieux, la surface d'un article à trois dimensions obtenu par compression de produits fibreux fractionnés mélangés à un liant durcissant à chaud, cette couche décorative comportant au moins un élément plat allongé. The subject of the invention is a process making it possible to cover with a decorative layer consisting, for example of a plywood of precious wood, the surface of a three-dimensional article obtained by compression of fractionated fibrous products mixed with a hot hardening binder, this decorative layer comprising at least one elongated flat element.

La demande de brevet allemand 2557 344 décrit un procédé de revêtement, suivant lequel les articles compressés recouverts sur au moins une face par une couche décorative ont été obtenus par compression d'un mélange ne foisonnant pas de produits fibreux et d'un liant durcissant à chaud, cette compression étant telle que l'on obtient d'abord à partir de ce mélange par compression à froid une ébauche que l'on introduit ensuite dans une presse à chaud,avec la ou les couches décoratives de revêtement,où le mélange prend la forme de l'article comprimé désiré et est durci par la chaleur en même temps qu'il reçoit sa couche de revêtement décorative. German patent application 2557 344 describes a coating process, according to which the compressed articles covered on at least one side with a decorative layer were obtained by compression of a mixture not abounding in fibrous products and of a hardening binder. hot, this compression being such that a blank is first obtained from this mixture by cold compression which is then introduced into a hot press, with the decorative coating layer (s), where the mixture takes the shape of the desired compressed article and is heat cured at the same time as it receives its decorative coating layer.

Le mélange non foisonnant est constitué principalement par des matières fibreuses contenant des iignocelluloses, telles que des copeaux de bois broyés et séchés, des fibres de bagasse etc ... mélangés à une résine synthétique durcissant à chaud telle que celles obtenues à partir de mélamine,d'urée et de formol ou de phénol et de formol. The non-abundant mixture consists mainly of fibrous materials containing iignocelluloses, such as crushed and dried wood shavings, bagasse fibers, etc. mixed with a hot-hardening synthetic resin such as those obtained from melamine, urea and formalin or phenol and formalin.

On peut cependant utiliser à la place des fibres de bois ou de bagasse broyées et séchées, des fibres d'autres natures, telles que les fibres de verre, la laine minérale ou les fibres d'amiante, seules ou en mélanges appropriés et auxquelles on incorpore des liants correspondants , de préférence de nature organique.However, crushed and dried wood fibers or bagasse fibers can be used, fibers of other kinds, such as glass fibers, mineral wool or asbestos fibers, alone or in suitable mixtures and to which incorporates corresponding binders, preferably organic in nature.

Les articles comprimés ainsi obtenus portent un revêtement décoratif constitué, par exemple, par un tissu, du contreplaqué, une feuille de papier imprimée, une feuille de produit synthétique ou tout autre produit approprié. On sait également que l'on peut, le cas échéant, recouvrir d'une couche de protection transparente cette couche de revêtement décorative, cette couche de protection pouvant être appliquée en même temps que la couche décorative, de préférence pendant la compression à chaud.On utilise, en général, pour une telle couche de protection le papier translucide dit " Overlay " qui est constitué par un papier alphacellulosique ne contenant pas d'addition inerte ou bien par une nappe de fibres de verre et qui est imprégn) par une résine synthétique appropriée ou bien recouvert. de part et d'autre par immersion dans une telle résine. Cette couche de protection protége en général suffisamment la couche décorative, notamment contre l'usure, tout en la laissant visible après application sous pression de ladite couche de protection transparente. The compressed articles thus obtained carry a decorative coating consisting, for example, of a fabric, plywood, a printed sheet of paper, a sheet of synthetic product or any other suitable product. It is also known that this decorative coating layer can be covered, if necessary, with a transparent protective layer, this protective layer being able to be applied at the same time as the decorative layer, preferably during hot compression. In general, for such a protective layer, the translucent paper known as "Overlay" is used which is constituted by an alpha-cellulose paper containing no inert addition or else by a sheet of glass fibers and which is impregnated by a resin. synthetic suitable or well covered. on both sides by immersion in such a resin. This protective layer generally protects the decorative layer sufficiently, in particular against wear, while leaving it visible after pressure application of said transparent protective layer.

Le procédé antérieur de revêtement d'articles compressés par application d'une couche décorative s'est répandu dans une très grande mesure et peut etre appliqué à la confection d'articles à peu près plats. Il n'est cependant pas applicable tel quel dans le cas d'articles à courbures dans les trois dimensions tels que les couvercles bombés de boites ou autres récipients à recouvrir d'une couche décorative. The previous method of coating compressed articles by applying a decorative layer has spread to a very great extent and can be applied to the making of nearly flat articles. However, it is not applicable as is in the case of articles with three-dimensional curvatures such as domed lids of boxes or other containers to be covered with a decorative layer.

Le problème posé par l'invention consiste à perfectionner le procédé antérieur de manière à pouvoir revêtir aussi un article présentant des courbures dans les trois dimensions et à obliger la couche décorative au cas où elle présenterait des madrures ou un dessin à conserver un comportement uniforme même sur les parties incurvées de la surface à revêtir. The problem posed by the invention consists in perfecting the previous process so as to also be able to coat an article having curvatures in three dimensions and to oblige the decorative layer in the event that it presents ribbing or a design to maintain a uniform behavior even on the curved parts of the surface to be coated.

Le problème ainsi posé est résolu conformément à l'invention par le fait que la pièce formant la couche décorative,présentant localement des fentes ou des échancrures Ot à la fois des fentes et des échancrures, est appliquée sur l'article considéré qui a de préférence été soumis préalablement à une compression à froid, pour être reliée ensuite d'une manière indissoluble au dit article par compression à chaud. The problem thus posed is solved in accordance with the invention by the fact that the part forming the decorative layer, locally presenting slots or notches Ot both slots and notches, is applied to the article considered which preferably has was subjected beforehand to cold compression, in order to be then connected in an indissoluble manner to said article by hot compression.

On va maintenant décrire l'invention avec plus de détails en se referant aux dessins ci-joints donnés à titre d'exemple. Sur ces dessins
La Fig. 1 représente un article obtenu par compression, présentant des courbures suivant les trois dimensions et portant une couche décorative de revêtement.We will now describe the invention in more detail with reference to the accompanying drawings given by way of example. On these drawings
Fig. 1 represents an article obtained by compression, having curvatures according to the three dimensions and carrying a decorative coating layer.

La Fig. 2 est une coupe transversale suivant la ligne AB de la Fig. 1. Fig. 2 is a cross section along the line AB of FIG. 1.

La Fig. 3 représente une portion du revêtement décoratif avec une fente qui y est ménagée. Fig. 3 shows a portion of the decorative covering with a slot therein.

La Fig. 4 représente une portion d'un autre revêtement décoratif avec une echan- crure qui y est ménagée. Fig. 4 shows a portion of another decorative covering with an indentation therein.

La Fig. 5 est une coupe d'une paroi de l'article compressé portant son revêtement. Fig. 5 is a section through a wall of the compressed article carrying its coating.

La Fig. 1 représente une forme d'exécution particulière d'un article 1 à trois dimensions obtenu par compression et porteur d'un revêtement décoratif. L'article représenté ainsi revêtu peut constituer, par exemple, le couvercle d'une boite rectangulaire, non représentée. Ce couvercle n'est pas bombé seulement dans le sens transversal comme on le voit sur la Fig. 2,mais il présente encore une courbure dans le sens longitudinal , en particulier à ses extrémités. Fig. 1 shows a particular embodiment of a three-dimensional article 1 obtained by compression and carrying a decorative coating. The article shown thus coated may constitute, for example, the cover of a rectangular box, not shown. This cover is not curved only in the transverse direction as seen in FIG. 2, but it still has a curvature in the longitudinal direction, in particular at its ends.

Avant le processus de recouvrement et comme indiqué sur la Fig 2, l'article désigné par 2 qui a déjà subi une compression préliminaire est encore indépendant de la couche de revêtement 3. Pour obtenir une application uniforme de cette couche décorative 3 sur l'article compressé terminé 1, l'invention prévoit de découpez dans la zone du revêtement correspondant aux parties bombées de l'article des fentes 4 (Fig 3) ou des échancrures 5 (Fig 5) sur des longueurs dépendant de I'importance de la courbure de l'article. Before the covering process and as shown in Fig 2, the article designated by 2 which has already undergone a preliminary compression is still independent of the covering layer 3. To obtain a uniform application of this decorative layer 3 on the article compressed finished 1, the invention provides to cut in the area of the covering corresponding to the curved parts of the article slots 4 (Fig 3) or notches 5 (Fig 5) on lengths depending on the magnitude of the curvature the article.

Comme on le voit sur les Figs 3 et 4, la couche décorative 3 peut porter le long des bords de la fente 4 ou de l'échancrure 5 une couche auxiliaire 6 d'une colle durcissant sous l'effet de la chaleur et de la pression. As seen in Figs 3 and 4, the decorative layer 3 can carry along the edges of the slot 4 or the notch 5 an auxiliary layer 6 of a glue hardening under the effect of heat and pressure.

Lorsque l'on place la couche décorative 3 comportant des fentes 4 ou des échancrures 5 ou encore à la fois des fentes et des échancrures, sur l'article 2 qui a été soumis à une compression préliminaire et que l'on soumet l'ensemble à une compression à chaud, il ne se produit pas seulement une liaison durable assurée entre la couche décorative 3 et l'article compressé,mais de plus les bords opposés des fentes ou des échancrures se chevauchent.en 7 comme on le voit en Fig 5 de telle sorte que ces bords sont reliés d'une manière durable entre eux et avec l'article compressé. En même temps, on obtient pour la couche décorative une surface apparente uniforme et lisse sans plis et sans lignes marquant des liaisons et le motif du décor s'étend d'une manière régulière suivant le dessin proposé. L'application sous pression de la couche décorative et surtout des bords superposés des fentes et des échancrures de cette dernière sur l'article froid,qui a été soumis à une pression préliminaire et qui présente encore une certaine élasticité, empêche tout écrasement ou déformation de la couche décorative sous l'effet de la forte pression ainsi appliquée et par suite toute modification de ses propriétés optiques et mécaniques. When placing the decorative layer 3 having slots 4 or notches 5 or even both slots and notches, on the article 2 which has been subjected to a preliminary compression and that the whole is subjected to hot compression, not only does a lasting bond ensured between the decorative layer 3 and the compressed article, but moreover the opposite edges of the slots or notches overlap. in 7 as seen in FIG 5 such that these edges are durably connected to each other and to the compressed article. At the same time, a uniform and smooth apparent surface is obtained for the decorative layer without folds and without lines marking connections and the pattern of the decoration extends in a regular manner according to the proposed drawing. The application under pressure of the decorative layer and especially of the superimposed edges of the slots and of the notches thereof on the cold article, which has been subjected to a preliminary pressure and which still has a certain elasticity, prevents any crushing or deformation of the decorative layer under the effect of the high pressure thus applied and consequently any modification of its optical and mechanical properties.

Claims (3)

REVENDICATIONS 1 Procédé de revêtement de la surface d'articles à trois dimensions obtenus par compression.1 Method for coating the surface of three-dimensional articles obtained by compression.
Figure img00040001
Figure img00040001
 caractérisé Dar le fait oue l'on place, sur l'article à comprimer et déjà précompressé à characterized by the fact that it is placed on the article to be compressed and already precompressed at constituée par exemple par une feuille de contreplaqué en bois précieux, ce procédé étant constituted for example by a sheet of plywood of precious wood, this process being étant effectué avec une couche décorative formant au moins une pièce plane allongée et being made with a decorative layer forming at least one elongated flat part and de matières fibreuses fractionnées mélangées à un liant durcissant à chaud, ce revêtement of fractionated fibrous materials mixed with a hot hardening binder, this coating d'une manière indissoluble. in an indissoluble way. crures, après quoi on procède à la compression à chaud qui relie cette pièce à l'article crures, after which we proceed to hot compression which connects this part to the article froid, la pièce qui doit former La coucne décorative et qui presente des tentesdes ecnan cold, the room which must form the decorative layer and which presents tentsdes ecnan 2 Procédé suivant la revendication 1 caractérisé par le fait que l'on recouvre les bords2 Method according to claim 1 characterized in that the edges are covered en regard des fentes ou des échancrures de la couche décorative avec une couche de opposite the slots or notches of the decorative layer with a layer of colle durcissant à chaud. hot-setting adhesive. 3 Procédé suivant les revendications 1 et 2 caractérisé par le fait que les fentes et les3 Method according to claims 1 and 2 characterized in that the slots and the échancrures sont conçues de telle manière que ces bords se recouvrent lorsqu'on referme notches are designed so that these edges overlap when closed la presse de chauffage.  the heating press.
FR8015570A 1980-01-31 1980-07-09 COATING PROCESS FOR ARTICLES FORMED BY COMPRESSION Expired FR2474951B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19803003397 DE3003397A1 (en) 1980-01-31 1980-01-31 METHOD FOR COATING PRESSED BODIES

Publications (2)

Publication Number Publication Date
FR2474951A1 true FR2474951A1 (en) 1981-08-07
FR2474951B1 FR2474951B1 (en) 1985-06-21

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ID=6093336

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Application Number Title Priority Date Filing Date
FR8015570A Expired FR2474951B1 (en) 1980-01-31 1980-07-09 COATING PROCESS FOR ARTICLES FORMED BY COMPRESSION

Country Status (7)

Country Link
JP (1) JPS56117646A (en)
CS (1) CS216677B2 (en)
DE (1) DE3003397A1 (en)
FR (1) FR2474951B1 (en)
GR (1) GR67619B (en)
IT (1) IT1131504B (en)
YU (1) YU113080A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2628673A1 (en) * 1988-03-21 1989-09-22 Rol Rougier Ocean Landex Sealing boundary between impregnated paper and particle board - by applying liquid plastic to board between cold and hot pressing it
CN111070957A (en) * 2019-03-29 2020-04-28 金华市海日家居用品有限公司 Sanding-free decorative pattern veneer processing technology

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2199697A5 (en) * 1972-08-03 1974-04-12 Tokyo Plywood Kk

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5033127B2 (en) * 1973-06-20 1975-10-28

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2199697A5 (en) * 1972-08-03 1974-04-12 Tokyo Plywood Kk

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2628673A1 (en) * 1988-03-21 1989-09-22 Rol Rougier Ocean Landex Sealing boundary between impregnated paper and particle board - by applying liquid plastic to board between cold and hot pressing it
CN111070957A (en) * 2019-03-29 2020-04-28 金华市海日家居用品有限公司 Sanding-free decorative pattern veneer processing technology

Also Published As

Publication number Publication date
YU113080A (en) 1983-02-28
CS216677B2 (en) 1982-11-26
DE3003397A1 (en) 1981-08-06
FR2474951B1 (en) 1985-06-21
IT1131504B (en) 1986-06-25
GR67619B (en) 1981-08-31
IT8022069A0 (en) 1980-05-15
JPS56117646A (en) 1981-09-16

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