EP0007944A1 - Procede de fabrication d'un contenant en carton plie et revetu d'une feuille impermeable et flan pour la mise en oeuvre de ce procede. - Google Patents
Procede de fabrication d'un contenant en carton plie et revetu d'une feuille impermeable et flan pour la mise en oeuvre de ce procede.Info
- Publication number
- EP0007944A1 EP0007944A1 EP19780900134 EP78900134A EP0007944A1 EP 0007944 A1 EP0007944 A1 EP 0007944A1 EP 19780900134 EP19780900134 EP 19780900134 EP 78900134 A EP78900134 A EP 78900134A EP 0007944 A1 EP0007944 A1 EP 0007944A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- packaging
- blank
- cardboard
- lines
- walls
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS 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
- B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
- B65D5/42—Details of containers or of foldable or erectable container blanks
- B65D5/56—Linings or internal coatings, e.g. pre-formed trays provided with a blow- or thermoformed layer
Definitions
- the present invention relates to packaging obtained from a blank of cardboard p at, cut and creased and then folded along these creasing lines to be set in volume.
- the purpose of the creasing operation is to weaken the cardboard in well-defined places, where it must be folded when it is placed in volume. It is important to obtain the best possible creases both for the appearance of the packaging and for its ability to pass over an automatic packaging chain for example.
- the creasing is obtained by means of a male organ called a "repressor" and a female counterpart called a "gutter” so that the repeller produces permanent deformation of the cardboard by forcing it to enter the gutter. .
- a crease line therefore comprises a hollow part, or "female” formed by the repressor and a part in re ⁇ lief called "bead".
- a cardboard sheet being put in place to be creased it is equally possible to provide the bead on the lower face or on the upper face of the cardboard sheet.
- the subsequent folding must always be done in a given direction, that is to say that the female part corresponds to the outside of the fold and constitutes, in a way, the male edge of the object obtained by folding.
- this permanent deformation causes a tension between the layers which can be observed when looking at the crease line in section.
- this tension is greater than the cohesive force of the layers, the cardboard "delaminates" and causes the desired hinge effect.
- packages which are made up of a cardboard part suitably cut, rai ⁇ born and folded and a part made of synthetic material applied to the entire internal surface of the packaging by thermo ⁇ forming.
- thermoforming consists in placing a plastic sheet above the cardboard part and then causing the plastic sheet to deform by heating it and applying air pressure to it so that this plastic sheet closely follows the shapes of the cardboard part and is applied as perfectly as possible along the concave as well as convex edges.
- a sheet of ther oform ⁇ e synthetic material has a concave shape, such as a tray for example
- the plastic sheet must stick to the entire surface of the cardboard part, it may happen that air remains trapped between this cardboard part and the plastic sheet and this occurs particularly at edge proximity
- the presence of these air bubbles is a serious drawback not only vis-à-vis the external appearance of the packaging but also by the fact that if the air expands following an increase in temperature for example, it can cause tearing of the sheet of synthetic material which ensures the seal with respect to the cardboard, so that such packaging must be discarded when they have bubbles of air.
- the present invention relates to a package of this type, 'that is to say comprising a paperboard portion and a plastic portion associated by thermoforming and which does not present the above drawbacks.
- French patent 2,197,776 which describes a cardboard packaging, among many others, which includes cleaning lines.
- V-shaped notches or folding grooves are hollowed out over approximately two thirds of the thickness of the carton and their shape is the one that causes the least stress. during the erection of the blank 3 in the outer pel ⁇ licules subsequently app wound on the blank. It is thus clearly stated that the sole purpose of these notches is to promote folding
- the cardboard blank is folded according to the notches (in two different directions, by the way before the installation of a film ' on the notched face
- the forecast of these entai the main purpose of them is to allow a made application of the film on the cardboard by allowing the evacuation of air between the cardboard and the film.
- This is a very specific use of a groove formed in a box and cannot be preceded by the provisions of French patent 2,294,097.
- the present invention relates to a method of manufacturing a package from at least one cut and grooved blank which must subsequently be placed in volume by folding along creasing lines in order to present a bottom, walls which extend at an angle to the plane of the bottom and at least one flange which extends at an angle to the plane of the wall to which it is integral, ca characterized in that all the creases are made on the face of the blank which should match the inside of the package so that their female part is
- Figure 1 is a plan view of a blank cut and grooved according to the invention.
- Figure 2 is a sectional view taken along the line II-II of Figure 1.
- Figure 3 is a partial view on a larger scale showing a detail of Figure 2.
- Figure 4 is a partial sectional view of a package according to the invention before installation of the thermoplastic film.
- Figure ⁇ is a view similar to Figure 4 after installation of the thermoplastic film.
- a packaging according to the invention is obtained from a blank of cardboard which is cut and grooved to present a bottom 1, side walls 2 to 9 and upper edges in front of locate at the periphery of the finished packaging, 10 to 17.
- the bottom 1 is delimited with respect to the side walls by crease lines 18 and the side walls are delimited with respect to the edges by rai ⁇ nage lines 19
- the crease lines 18 and 19 are both formed on the face of the blank which will constitute the interior of the finished package so that their female parts are located on this inner face. .
- the crease lines 19 are therefore formed in the usual ha direction and the folding of the edges does not pose any problem, so that these edges will not only be sharp in order to have a rectilinear edge but also well planpuis- that no stress will come to tend to bend or de ⁇ form these edges.
- the crease lines 18 are oriented in the opposite direction to what is necessary to obtain a correct folding since the folding of the side walls relative to the bottom will be inward (that is to say towards the female part) instead of going outside. In other words, it is the bead which will be located outside after folding, so that in principle, the disadvantages indicated above must be found here, that is to say having an effect spring which tends to open the hinge.
- the air included between the inner face of the cardboard part and the plastic film 20 tends to be forced from the center towards the periphery of the bottom 1 and when. the blank is grooved in accordance with the invention, this air can easily escape along the creasing lines 18 towards the spaces which remain between the side walls, so that the film applies perfectly without creating any air bubbles .
- the opposite effect would be obtained because the effect of the inking of the cardboard after folding amplifies the protrusion of the bead and creates in some way two longitudinal channels on either side of this bead, so that the air remains blocked in at least the lower channel and causes air bubbles which prevent the perfect bonding of the film of synthetic material on the cardboard part.
- the score lines 19 may be tional traditions such as their female parts being provided on the inside of the packaging, folding • edges outwards would be the right way.
- a cut is provided over a depth (FIG. 3) which is of the order of half the thickness y_ of the cardboard blank. It is clear that such a cut weakens the cardboard and removes any waterproofing in the event that it is coated with an outer layer.
- this plastic sheet 20 closes the cut 19 by reconstituting the seal (or by creating it) and keeps the edges perfectly horizontal. It can be seen that the cutting of the lines 19 allows the air which is there before the positioning of the sheet of synthetic material 20 to escape laterally, which again avoids the formation of bubbles.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Wrappers (AREA)
- Making Paper Articles (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7729714A FR2404566A1 (fr) | 1977-10-03 | 1977-10-03 | Procede de fabrication d'un emballage et emballage obtenu a partir de ce procede |
FR7729714 | 1977-10-03 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0007944A1 true EP0007944A1 (fr) | 1980-02-20 |
EP0007944B1 EP0007944B1 (fr) | 1984-01-25 |
Family
ID=9196045
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19780900134 Expired EP0007944B1 (fr) | 1977-10-03 | 1979-04-09 | Procede de fabrication d'un contenant en carton plie et revetu d'une feuille impermeable et flan pour la mise en oeuvre de ce procede |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0007944B1 (fr) |
DE (1) | DE2862367D1 (fr) |
FR (1) | FR2404566A1 (fr) |
WO (1) | WO1979000170A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3723192A1 (de) * | 1987-07-14 | 1989-01-26 | Unilever Nv | Kartonschale mit tiefgezogenem kunststoffteil |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2480708A1 (fr) * | 1980-11-07 | 1981-10-23 | Impression Cartonnage Ste Pari | Contenant en carton plie revetu d'une pellicule en matiere synthetique et muni d'un cadre peripherique en une seule piece ainsi que son procede de fabrication |
US4555381A (en) * | 1980-11-07 | 1985-11-26 | Societe Parisienne D'impression Et De Cartonnage | Process of making folded cardboard container covered by a layer of synthetic material and provided with a peripheral frame |
FR2570645B1 (fr) * | 1984-09-24 | 1989-07-21 | Poudres & Explosifs Ste Nale | Procede de fabrication d'objets combustibles par emboutissage de papier combustible et objets combustibles ainsi obtenus |
FR2596145B1 (fr) * | 1986-03-21 | 1990-03-09 | Poudres & Explosifs Ste Nale | Procede de fabrication d'objets combustibles par emboutissage de disques de papier combustible au moyen d'un poincon souple |
JPH03102485U (fr) * | 1990-02-08 | 1991-10-24 | ||
US5326021A (en) * | 1993-01-28 | 1994-07-05 | Westvaco Corporation | Rigid insulated food tray |
US5377903A (en) * | 1994-06-16 | 1995-01-03 | International Paper Company | Reduced warp paperboard tray |
FR2975973B1 (fr) * | 2011-05-30 | 2014-04-04 | Formkraft | Procede de fabrication d'une barquette etanche en carton pour la realisation d'un emballage permettant le conditionnement de produits |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB839580A (en) * | 1956-02-20 | 1960-06-29 | Matchall Co Aktiebolag | Improvements in a method of manufacturing boxes of cardboard |
NL7211905A (fr) * | 1972-08-31 | 1974-03-04 | ||
SE7415580L (sv) * | 1974-12-12 | 1976-06-14 | Akerlund & Rausing Ab | Laminatforpackning |
-
1977
- 1977-10-03 FR FR7729714A patent/FR2404566A1/fr active Granted
-
1978
- 1978-10-02 DE DE7878900134T patent/DE2862367D1/de not_active Expired
- 1978-10-02 WO PCT/FR1978/000026 patent/WO1979000170A1/fr unknown
-
1979
- 1979-04-09 EP EP19780900134 patent/EP0007944B1/fr not_active Expired
Non-Patent Citations (1)
Title |
---|
See references of WO7900170A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3723192A1 (de) * | 1987-07-14 | 1989-01-26 | Unilever Nv | Kartonschale mit tiefgezogenem kunststoffteil |
Also Published As
Publication number | Publication date |
---|---|
EP0007944B1 (fr) | 1984-01-25 |
FR2404566A1 (fr) | 1979-04-27 |
FR2404566B1 (fr) | 1981-11-27 |
DE2862367D1 (en) | 1984-03-01 |
WO1979000170A1 (fr) | 1979-04-05 |
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