OA1407A - Plastic container and method of manufacture - Google Patents

Plastic container and method of manufacture Download PDF

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Publication number
OA1407A
OA1407A OA51877A OA51877A OA1407A OA 1407 A OA1407 A OA 1407A OA 51877 A OA51877 A OA 51877A OA 51877 A OA51877 A OA 51877A OA 1407 A OA1407 A OA 1407A
Authority
OA
OAPI
Prior art keywords
welds
strips
container
folded
sheath
Prior art date
Application number
OA51877A
Other languages
French (fr)
Original Assignee
Mm Leon Doyen
Doyen Louis
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
Priority to FR69043047A priority Critical patent/FR1349272A/en
Priority to FR69043323A priority patent/FR83259E/en
Priority to FR69044034A priority patent/FR84495E/en
Application filed by Mm Leon Doyen, Doyen Louis filed Critical Mm Leon Doyen
Publication of OA1407A publication Critical patent/OA1407A/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D75/00Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/008Standing pouches, i.e. "Standbeutel"
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/04Dielectric heating, e.g. high-frequency welding, i.e. radio frequency welding of plastic materials having dielectric properties, e.g. PVC
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/40General 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
    • B29C66/41Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43Joining a relatively small portion of the surface of said articles
    • B29C66/431Joining the articles to themselves
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/40General 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
    • B29C66/41Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43Joining a relatively small portion of the surface of said articles
    • B29C66/431Joining the articles to themselves
    • B29C66/4312Joining the articles to themselves for making flat seams in tubular or hollow articles, e.g. transversal seams
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/40General 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
    • B29C66/41Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43Joining a relatively small portion of the surface of said articles
    • B29C66/432Joining 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
    • B29C66/4322Joining 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 by joining a single sheet to itself
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/83General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832Reciprocating joining or pressing tools
    • B29C66/8322Joining or pressing tools reciprocating along one axis
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D31/00Bags or like containers made of paper and having structural provision for thickness of contents
    • B65D31/005Bags or like containers made of paper and having structural provision for thickness of contents by folding a single blank to U-shape to form the base of the bag and opposite sides of the body-portion, the remaining sides being formed by extensions of one or more of these opposite sides
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D33/00Details of, or accessories for, sacks or bags
    • B65D33/02Local reinforcements or stiffening inserts, e.g. wires, strings, strips or frames
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/01General aspects dealing with the joint area or with the area to be joined
    • B29C66/05Particular design of joint configurations
    • B29C66/10Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11Joint 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
    • B29C66/112Single lapped joints
    • B29C66/1122Single lap to lap joints, i.e. overlap joints
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/40General 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
    • B29C66/41Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43Joining a relatively small portion of the surface of said articles
    • B29C66/431Joining the articles to themselves
    • B29C66/4312Joining the articles to themselves for making flat seams in tubular or hollow articles, e.g. transversal seams
    • B29C66/43129Joining the articles to themselves for making flat seams in tubular or hollow articles, e.g. transversal seams said flat seams being transversal but non-orthogonal with respect to the tubular or hollow articles, i.e. oblique
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/70General 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
    • B29C66/72General 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 structure of the material of the parts to be joined
    • B29C66/723General 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 structure of the material of the parts to be joined being multi-layered
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/70General 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
    • B29C66/73General 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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739General 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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392General 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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B31MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31BMAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2155/00Flexible containers made from webs
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B31MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31BMAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2155/00Flexible containers made from webs
    • B31B2155/002Flexible containers made from webs by joining superimposed webs, e.g. with separate bottom webs
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B31MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31BMAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2160/00Shape of flexible containers
    • B31B2160/20Shape of flexible containers with structural provision for thickness of contents

Abstract

1,069,268. Making plastics bags. L. DOYEN, and L. DOYEN. Nov. 6, 1963 [Nov. 14, 1962; Feb. 13, 1963; Sept. 27, 1963], No. 43819/63. Heading B5D. [Also in Division B8] A machine makes plastics bags with gusseted bottoms, lateral welds 4 uniting the entire edges of their sides, and oblique welds 5 joining each side to the bottom area facing it (see Division B8). In one embodiment, Fig. 10, the bags are made of two strips of thermoweldable material 12, 13, and a strip 14 of composite material thermoweldable on one surface folded into a V with this surface outwards. A punch 23 forms holes 15 in the doubled strip 14 before it is fed into rollers 18 between strips 12 and 13. Reciprocating electrodes 25 form oblique welds 5 and horizontal welds 7, and electrodes 26 form lateral welds 4 which unite strips 12, 13 through hole 15 near the bag base. Individual bags are severed from the strips by a cutter 27.

Description

AFRICAN OFFICE AND MALAGASY

OF INDUSTRIAL PROPERTY B. P. 887 YAOUNDE (Cameroon)

PATENT

International Classification: B 29 - B 67 No. 01407

AS REQUESTED ON 31 DECEMBER 1964 at 6.16 pm at ΙΌ.Α.Μ.Ρ.Ι. (P.V. No. 51.877) by MM. Léon DOYEN and Louis DOYEN, resident in France. ISSUED ON 4 JULY 1969, published in Official Bulletin No. 1 of 1969. PRIORITY: Patent application filed in France under Nos. 43,047,43,323 and 44,034 on 14 November 1962, 13 February 1963 and 27 September 1963 with names applicants. Plastic container and method of manufacture The invention relates to a container made of plastic material of the type made by welding and cutting in plastic sheet material.Through its manufacturing process, this container has the following essential advantages:

It results in strong pressure and violent shock in the risk of rupture;

He has a rational form thanks to which he stands perfectly.

This container is formed by two faces and by a base which extends but is folded to form with them a W, and two side welds extend over the whole height of its faces, including its bottom, and oblique wipes or a curvilinear weld whose patches are located on the side welds, close to the fold of the bottom, assemble each fac with the bottom area that is vis-à-vis.

By virtue of this constitution and these welds, the filled packing has a flat hexagon or rhomboid base whose two opposing vertices are formed by the lower ends of the two lateral seams which constitute two rela-tively rigid uprights, and its bottom. forms one or two diodes, the end faces of which are triangular and hang from the aforementioned uprights with respect to which they are inclined. As a result, the thrust exerted by the liquid on the bottom, even in the event of impact, is regularly distributed, which gives the container great resistance.

For its manufacture, this container is always made by welding and cutting in one or more plastic strips, at least one of the longitudinal edges is folded to delimit the W frontform the bottom of the containers whose axis is perpendicular to that of this or these bands.

According to a mode of implementation of the manufacturing process of these containers, the plastic material of departure consists of a single sheet whose median longitudinal portion is folded on itself to form a W; and on this sheet are executed transverse deburrings laterally delimiting the packages and assembling the four faces of this W, and curvilinear or oblique welds which, extending only in the folded area W, join the outer faces of the W with the inner ones, but not the four faces between them.

According to an alternative embodiment, a flattened plastic sheath is used, the two longitudinal edges of which are folded back on themselves to form a W each, so that the same welding operations allow the simultaneous manufacture of two separate containers at a later date. the other by a longitudinal longitudinal cut of the sheath.

According to another variant, three sheets are used superimposed, the intermediate one is lesslarge and is folded on itself to form a V, these three sheets being joined by the welds quidélimitent the sides and the bottom of the container.

The various welds can be performed separately or simultaneously, and the separation of the containers is done by cutting between or on the transverse welds.

Care must be taken, however, that transverse welds and curvilinear or oblique welds form the bottom of the container following the assembly indicated above. For this purpose, according to one embodiment of the inven-tion, the plastic sheet is a sheet of complex material, consisting of at least two layers of different plastic material such that one of thesematerial is heat-sealable, while the the other is not, and openings are formed in this wall on either side of its median longitudinal line at a distance equal to the width of the receptacle, so that the transverse welds passing through these openings assemble the two outer faces between them, while the curvilinear or oblique welds passing out of these apertures only assemble each external face with the inner one which faces it.

According to an alternative embodiment, the sheet of plastic material is of any type, complex or not, but heat-sealable on both sides, and an anti-adherent screen is interposed in the inner fold of the W, at the time of execution of the curvilinear welds orobliques, so that they assemble only each outer surface with the corresponding inner face, etcet screen is removed for the execution of welds [01407] - 2 transverse which laterally close the container and must assemble the four thicknesses W.

The attached schematic drawing shows, as non-limiting examples, some embodiments of this container and two kinds of apparatus for its manufacture:

Figures 1, 2 and 3 are views of a packagerempli and closed, respectively in perspective, deface and vertical half-section;

Figures 4, 5, 6 and 7 are schematic front views showing a container in the case of various embodiments of its welds;

Figure 8 is a schematic vertical sectional view of any of these containers;

Figure 9 is a perspective view showing the sheets used for producing the containers according to an embodiment of the invention;

Figure 10 shows in perspective the various organs of a machine for this implementation, withrepresentation containers as and their manufacture;

Figure 11 is a cross-sectional view, showing the plastic sheath used for the realization of the containers according to an alternative embodiment of the invention;

Figure 12 shows in perspective the organs of a machine for the implementation of this variant.

The container object of the invention is essentially formed, as shown in FIG. 8, of two faces 2 and a bottom 3 which are connected to them and folded to form a W in combination therewith. The connection of these faces 2 and the bottom 3 for the realization of the container, is achieved by two side welds 4 which extend over the entire height of the faces 2 including the bottom 3 and thanks to two oblique welds 5 quine extend only in the zone of W formed by the faces 2 and the bottom 3; these oblique welds 5 have a starting point 6 which is located on the corresponding side weld 4 near the fold formed by the bottom 3. This arrangement is particularly important because it is thanks to it that the container withstands high pressures and violent shocks without risk of rupture, the thrust of the liquid is always regularly distributed on the bottom of the container.

Independently of the lateral and oblique welds 5, other welds may be formed, for example, a horizontal weld 7 which extends over any base of the receptacle and to which the oblique welds 5 are connected. This horizontal weld 7 is also executed simultaneously with the oblique welds 5, by the same electrodes.

It should be noted, and this is another essential feature of the invention, that the side welds 4 assemble the two sides 2 of the container, including the area formed by the bottom 3; it follows that in this zone, four thicknesses are assembled by the same weld. On the contrary, the oblique and possibly horizontal bores 7, which are made only in the bottom zone 3, assemble only two thicknesses of this bottom, namely an external face with the corresponding inner face, but not the four faces between them, that is to say, the two outer faces and the two inner faces.

FIGS. 1 to 7 show various forms of execution of these oblique or curvilinear welds executed in the bottom zone 3. In the case of the container shown in FIGS. 1 to 3, two angular welds 5 and a horizontal weld 7 are produced. ; in the case of the container, shown in FIG. 4, a single weld 8 is produced whose lower edge is horizontal and the upper edge of which is a broken line, in the case of FIG. 5 a single curvilinear weld is produced. 9; in the case of FIG. 6, two welds 10α-10δ are produced whose lower edge is horizontal and the upper edge of which is oblique, and in the case of FIG. 7, two oblique welds 11a-11h are made. By way of examples will be described, hereinafter, two embodiments of containers having the appearance of that shown in Figures 1 to 3.

The first embodiment can be seen in FIGS. 9 and 10. As shown in FIG. 9, the containers are obtained from three plastic material strips, respectively 12, 13 and 14. The two strips 12 and 13 have the same width and are super-posed. The strip 14, which may optionally be different in denature and be thicker, has a very narrow width and is folded back on itself to form a V whose two edges are juxtaposed at two longitudinal edges of the strips 12 and 13. The strips 12, 13 and 14 can be made of anyplastic material: simple or complex. In the case where this material is of the complex type, that is to say, it has two layers of plastic of different natures, such that one of these materials is heat-sealable, while the other is not. it is necessary to provide means for the lateral welds 4 to assemble the two strips 12 and 13, including the area where the inter-medial band 14 is folded on itself. For this purpose, apertures 15 are formed in correspondence on both sides of the strip 14 on either side of its fold line, the inter-axis of these openings being equal to the width of the containers to be made, and the strips 12 and 13 are arranged so that their heat sealable faces are vis-à-vis. It follows that :

Welds made perpendicularly to the axis of strips 12-13-14 and passing through the openings 15 assem-bling the strips 12-13 over their entire width, including the band 14 folded on itself, these sou- hard ones will be those 4 which laterally delimit the containers;

The welds made on the strips 12-13 in their area comprising the strip 14, assemble only the strip 12 with one of the faces of the strip 14, and tabande 13 with the other side of the strip 14; this is due to the complex nature of bands 12-13-14; these sou-dures will be those 5-7 which will delimit the bottom container container and suspend it to the side welds 4. In Figure 10, 16 and 17 designate the two bobbins which flow strips respectively 12 and 13 quipass in a jar 18 then allowing them move one above the other, in the direction of the arrow 19, through a traction system not shown in the drawing. 21 designates another coil whose axis is vertical, that is to say perpendicular to those of the coils 16 and 17. This coil 21. delivers the ribbon 14 which passes into a rack 22 allowing it to fold on I him even to form a V. After formation in V, the

Claims (4)

  1. ribbon 14 passes into the seat 18, between the two corresponding longitudinal edges of the strips 12 and 13. In the portion between the two wedges 18 and 22 is disposed a perforator 23 whose operation-is linked to that of moving the strips 12, 13 and 14. This perforator executes on the folded tape14 the perforations 15 whose inter-axis is equal to the lar-geur containers to achieve. Downstream of the jig 18 are disposed two complementary elec-trodes 25 animated a displacement movement perpendicular to that of the bands12-13-14. These electrodes 25 are dimensioned and their operating frequency is such that they perform oblique 5 and horizontal welds 7 in the area where the strips 12, 13 and 14 are superimposed. Thus, the bottom of the container is executed. Downstream of the electrodes 25 is another pair of electrodes 26 intended to perform the transverse side welds 4 passing through the openings 15 of the strip 14. After passing between the electrodes 26, the strips 12-13-14 thus delimit several containers which are separated from each other by a knife or a chisel 27. Above has been described an installation for the manufacture of the containers according to the invention, in the case of the use of complex plastic material. In the case of the use of a simple plastic material, or even of a complex plastic material, the two sides of which are heat-sealable, this installation can not be suitable because the oblique 5 and horizon-7 welds 7 would assemble the four thicknesses formed by the strips 12, 13, 14, which would prevent the formation of the bottom. Figure 12 shows, by way of example, an installation-tion for the realization of these containers with simple plastic material. This material can have various initial presentations: superimposed strips, folded sheet or folded sheath. Figures 11 and 12 show this last case. 28 designates a reel delivering the sheath of plastic material 29 flattened on itself and whose two edges are folded on themselves, so that each edge a W, as shown in 30. On the parcourse of the sheath 29 in the direction of the arrow 31, are placed two non-stick screens 32 which have a length greater than the width of a container and are placed opposite one another inside the lateral folds 30 of the sheath 29. On each side of each of these screens 32 are placed two electrodes 33 which move in a plane perpendicular to the direction of movement of the sheath 29. When these electrodes 33 are closed by enclosing the edges of the lagoon 29, they execute the oblique welds 5 and the longitudinal weld 7, and, because of the presence of the screen 32, these welds assemble only one of the faces of the sheath with the corresponding inner face of the fold 30, and although the sheath is constituted sisters both sides in heat-sealable material. Downstream of the electrodes 33 are placed two other electrodes 34 which perform the lateral welds 4 of each container, and downstream of these electrodes 34 are placed a blade 35 which cuts the sheath followinga middle longitudinal line and a cutting device36 which separates the containers from each other. other. This apparatus makes it possible to obtain, with particularly simple means, a container identical to that obtained with the apparatus shown in FIG. 10, and it also has the advantage of having a minimum efficiency. two times higher, since two containers are obtained in the width of the sheath 29. The invention is not limited, of course, to the two embodiments of apparatus which have been described above, as examples; it embraces all variants. Thus, in particular, openings corresponding to those of FIGS. 9 and 10 can be made in the case of the use of a simple plastic material with the apparatus shown in FIG. non-stick, such as that 32 of Figure 12, can be used in the caseof the use of a plastic complex withthe apparatus shown in Figure 10. SUMMARY 1 ° A plastic container characterized in that it is formed by two faces and by a bottom whichprolonge, but is folded to form with them a W, and in that two side welds extend over toutle the height of its faces, including its bottom, and oblique wipes or a curvilinear weld whose points are located on the side welds, near the fold of the bottom, assemble each surface with the bottom area that is vis-à-vis.
  2. 2 ° Container as specified in 1 °, characterized in that it has a flat base in the form of hexa-gone or rhombus whose two opposite peaks are formed by the lower ends of the two lateral welders which constitute two relativementrigides amounts, and in that its bottom forms one or two dihedrals whose extreme faces are triangular and extend to the aforesaid uprights with respect to which they are inclined.
  3. 3 ° Process for manufacturing the container specified in 1 ° and 2 °, characterized by the following points taken together or separately: a. It is made by welding or cutting in one or more strips of plastic material, at least one of the longitudinal edges is folded to define the W to form the bottom of the containers whose axis is perpendicular to that of this or these strips; b. The starting plastic consists of a single sheet whose middle longitudinal part is folded on itself to form a W, and on this sheet are executed transverse welds laterally ditching the container and assembling the four sides of this W, and curvilinear welds or oblique which, extending only in the folded zone in W, assemble the outer faces of the W with those inside, but not the four faces between them; c. A flattened plastic sheath is used, the two longitudinal edges of which are folded on themselves to form a W each, so that the same welding operations allow the simultaneous manufacture of two containers separated laterally from one another by a longitudinal median cut of the sheath; d. Three superimposed sheets are used, of which the intermediate layer is narrower, and possibly of different denaturing and thickness, and is folded back on itself to form a V, these three sheets being joined together by the welds which delimit the sides. and the bottom of the container; e. The plastic sheet is a complex sheet of material consisting of at least two layers of different plastics material such that one of these layers is heat-sealable, while the other is not, and openings are provided in this sheet on both sides. the other of its median longitudinal line at a distance equal to the width of the receptacle, so that the transverse welds passing through these openings join the two outer faces between them, while the curvilinear or oblique welds passing out of these openings, assemble that each outer face with the inner one that luifait vis-à-vis; f. The plastic sheet is of any type, complex or not, but heat-sealable on both sides, and a non-stick screen is interposed in the inner fold of the W, at the time of execution curvilinear or oblique curvings, so that they have appeared only each outer face with the corresponding interior surface, this screen being suppressed for the execution of the transverse welds which close laterally the receptacle and must assemble the four thicknesses of the W.
  4. 4. As a new industrial product, any container as specified in 1 ° or 2 °. Léon DOYEN and Louis DOYENPar Power: Robert Pucheu
OA51877A 1962-11-14 1964-12-31 Plastic container and method of manufacture OA1407A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FR69043047A FR1349272A (en) 1962-11-14 1962-11-14 plastic container and its method of manufacture
FR69043323A FR83259E (en) 1962-11-14 1963-02-13 plastic container and its method of manufacture
FR69044034A FR84495E (en) 1962-11-14 1963-09-27 plastic container and its method of manufacture

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OA1407A true OA1407A (en) 1969-07-04

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OA51877A OA1407A (en) 1962-11-14 1964-12-31 Plastic container and method of manufacture

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US (1) US3380646A (en)
AT (1) AT247231B (en)
BE (1) BE639342A (en)
CH (1) CH421811A (en)
DE (2) DE1303917C2 (en)
DK (1) DK127242B (en)
FI (1) FI40415B (en)
FR (4) FR1349272A (en)
GB (1) GB1069268A (en)
NL (2) NL300500A (en)
NO (1) NO117965B (en)
OA (1) OA1407A (en)
SE (1) SE314189B (en)

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NO117965B (en) 1969-10-13
FR84495E (en) 1965-02-19
AT247231B (en) 1966-05-25
SE314189B (en) 1969-09-01
FR1349272A (en) 1964-01-17
FI40415B (en) 1968-09-30
DE1281140B (en) 1968-10-24
BE639342A (en) 1900-01-01
NL300500A (en) 1900-01-01
FR87996E (en) 1966-11-18
US3380646A (en) 1968-04-30
GB1069268A (en) 1967-05-17
DE1303917C2 (en) 1975-08-07
FR83259E (en) 1964-07-17
DE1303917B (en) 1975-08-07
NL126868C (en) 1900-01-01
CH421811A (en) 1966-09-30
DK127242B (en) 1973-10-08

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