EP0132191B1 - Method of reinforcing cardboard boxes - Google Patents
Method of reinforcing cardboard boxes Download PDFInfo
- Publication number
- EP0132191B1 EP0132191B1 EP84401449A EP84401449A EP0132191B1 EP 0132191 B1 EP0132191 B1 EP 0132191B1 EP 84401449 A EP84401449 A EP 84401449A EP 84401449 A EP84401449 A EP 84401449A EP 0132191 B1 EP0132191 B1 EP 0132191B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- resin
- blank
- grooved
- parts
- cardboard
- 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.)
- Expired
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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
- B65D5/44—Integral, inserted or attached portions forming internal or external fittings
- B65D5/441—Reinforcements
- B65D5/445—Reinforcements formed separately from the container
-
- 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 a method for producing a cardboard presentation box of high mechanical strength for packaging relatively heavy objects, such as glass bottles filled with a liquid.
- French Patent 2,209,693 describes a method of reinforcing a package by impregnating the narrow zones extending along the fold lines and not being crossed by fold lines using a thermosetting resin that then hardened, as well as a package obtained by this process.
- microcannelated cartons have been developed which, for a small thickness, have higher mechanical strength than a single carton of the same thickness. These cartons can be offset printed and grooved by conventional techniques. But they most often present unacceptable surface deformations when looking for a quality presentation of the box.
- the object of the present invention is to design a method for producing a presentation box with very high mechanical strength and high rigidity from thin cardboards which can be offset printed and grooved using standard mechanical or HF techniques. allowing work at high speeds.
- the method according to the present invention consists in selectively reinforcing the parts of the blank which are not crossed by a groove, so as to provide on each side of the different grooves unreinforced parts allowing subsequent shaping of the box, which reinforcement consisting of impregnating the entire surface of the cardboard blank with a curable polymerizable resin and subjecting only the parts to be reinforced to a treatment by high frequency producing localized polymerization.
- a reinforcement is used by adding an auxiliary material combined with the impregnation.
- the sealing of the auxiliary material and the polymerization of the impregnation resin are carried out by a single HF treatment.
- the impregnation resin is preferably a thermosetting resin such as an acrylic resin, of urephormol, of melamine phormol, a phenolic resin or also combinations of such resins.
- FIG 1 we see a cardboard blank 1 cut and pre-grooved in a conventional manner to form a parallelepipedic presentation box.
- This cut 1 has sides 2 to 5 intended to form the side, rear and front walls of the box.
- the flanks are separated by grooves 6 to 8.
- these flanks carry at their upper and lower ends tongues 9 to 15 intended to form the bottom and the cover of the box.
- These tabs are separated from said flanks 2 to 5 by grooves 16 to 22.
- the tab 10 and the flank 5 further comprise a sealing tab 23 and 24 respectively.
- Cutout 1 is made from cardboard with a grammage of less than 500 g. to allow conventional cutting and creasing by mechanical means working at high speed.
- the cardboard can thus be printed using a fast and economical offset process.
- the entire surface of the cardboard blank is impregnated with a thermosetting resin. Then we only submit the parts to strengthen to the HF treatment thus producing a polymerization and a localized hardening of the resin while the folding beads of the cutout are not affected by this treatment and thus allow shaping by mechanical means of the box.
- thermosetting resins such as acrylic, urephormol, melamine phormol resins, phenolic resin or combinations of such resins are used for this impregnation.
- the catalysts used with these resins determine the final stiffness of the treated parts of the cardboard blank.
- an HF tool is used as shown in FIG. 3.
- the marble 36 has on its underside for each part to be reinforced 25 to 29 (FIG. 1) a separate HF tool 37 to 40 consisting of a rectangular frame with a profile.
- Each frame includes a series of longitudinal and transverse cross members 42 and 43 respectively.
- Practice has shown that such a tool allows polymerization and hardening of the impregnation resin in the parts to be reinforced 25 to 29 to be sufficient to considerably improve the rigidity of the cardboard blank 1.
- the selective reinforcement is combined by providing cuts in auxiliary material with the reinforcement by localized impregnation and hardening.
- the cardboard blank 1 is first impregnated with a suitable resin.
- the auxiliary material cuts are put in place and in another phase, an HF treatment is applied which produces the sealing of the cuts and the localized hardening of the resin. This operation can, if necessary, be carried out in a single phase and with a single suitable HF tool.
- This tool can be of the type shown in FIG. 3. It then ensures, with a suitable adjustment of the HF press, simultaneously the sealing of the auxiliary material cuts and the polymerization as well as the hardening of the impregnation resin in the parts to be reinforce 25 to 29. It is of course also possible to seal the cutouts of auxiliary material and the polymerization of the impregnation resin in two successive phases and with two different tools as shown in FIGS. 2 and 3 respectively.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
- Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
- Making Paper Articles (AREA)
- Cartons (AREA)
Abstract
Description
La présente invention concerne un procédé pour la réalisation d'une boîte de présentation en carton de haute résistance mécanique pour l'emballage d'objets relativement lourds, tels que des bouteilles en verre remplies d'un liquide.The present invention relates to a method for producing a cardboard presentation box of high mechanical strength for packaging relatively heavy objects, such as glass bottles filled with a liquid.
Le brevet français 2 209 693 décrit un procédé de renforcement d'un emballage par imprégnation des zones étroites s'étendant le long des lignes de pliage et n'étant pas traversées par des lignes de pliage à l'aide d'une résine thermodurcissable que l'on fait ensuite durcir, ainsi qu'un emballage obtenu selon ce procédé.French Patent 2,209,693 describes a method of reinforcing a package by impregnating the narrow zones extending along the fold lines and not being crossed by fold lines using a thermosetting resin that then hardened, as well as a package obtained by this process.
Il est toutefois nécessaire d'utiliser un carton de forte épaisseur et d'une importante densité pour obtenir une rigidité suffisante, interdisant l'impression offset ainsi que les techniques de rainurage haute fréquence ou mécaniques habituelles. Pour des cartons d'un grammage allant jusqu'à 700 g., on peut remplacer le rainurage par un gauffrage mais cette technique est coûteuse et l'opération de gauffrage ne peut être effectuée qu'à faible vitesse.It is however necessary to use a very thick and dense cardboard to obtain sufficient rigidity, prohibiting offset printing as well as the usual high frequency or mechanical grooving techniques. For cardboard weights up to 700 g, the grooving can be replaced by embossing, but this technique is expensive and the embossing operation can only be carried out at low speed.
Pour remédier à cet inconvénient, on a développé des cartons à microcannelures qui présentent, pour une faible épaisseur, une résistance mécanique plus élevée qu'un carton simple de même épaisseur. Ces cartons peuvent être imprimés en offset et rainurés par des techniques classiques. Mais ils présentent le plus souvent des déformations de surface inacceptables lorsqu'on recherche une présentation de qualité de la boîte.To overcome this drawback, microcannelated cartons have been developed which, for a small thickness, have higher mechanical strength than a single carton of the same thickness. These cartons can be offset printed and grooved by conventional techniques. But they most often present unacceptable surface deformations when looking for a quality presentation of the box.
La présente invention a pour objet de concevoir un procédé pour réaliser une boîte de présentation d'une très haute résistance mécanique et d'une importante rigidité à partir de cartons de faible épaisseur pouvant être imprimés en offset et rainurés suivant des techniques mécaniques ou H.F. habituelles permettant un travail à des vitesses élevées.The object of the present invention is to design a method for producing a presentation box with very high mechanical strength and high rigidity from thin cardboards which can be offset printed and grooved using standard mechanical or HF techniques. allowing work at high speeds.
Le procédé selon la présente invention consiste à renforcer sélectivement les parties de la découpe qui ne sont pas traversées par un rainage, de façon à ménager de chaque côté des différents rainages des parties non renforcées permettant une mise en forme ultérieure de la boîte, lequel renforcement consistant à imprégner toute la surface de la découpe en carton avec une résine polymérisable durcissable et à soumettre seulement les parties à renforcer à un traitement par haute fréquence produisant une polymérisation localisée.The method according to the present invention consists in selectively reinforcing the parts of the blank which are not crossed by a groove, so as to provide on each side of the different grooves unreinforced parts allowing subsequent shaping of the box, which reinforcement consisting of impregnating the entire surface of the cardboard blank with a curable polymerizable resin and subjecting only the parts to be reinforced to a treatment by high frequency producing localized polymerization.
On peut ainsi utiliser une découpe en carton de faible épaisseur qui peut être imprimée en offset et rainée suivant un procédé classique à haute vitesse avant le renforcement de cette découpe suivant le procédé selon l'invention. Etant donné que ce renforcement ne concerne pas les bourrelets de pliage, la découpe renforcée peut être facilement mise en forme par des moyens mécaniques habituels.It is thus possible to use a thin cardboard blank which can be offset printed and creased according to a conventional high speed process before the reinforcement of this blank according to the method according to the invention. Since this reinforcement does not concern the folding beads, the reinforced cut can be easily shaped by conventional mechanical means.
De préférence, on utilise un renforcement par apport d'une matière auxiliaire combinée avec l'imprégnation. Dans ce cas, le scellage de la matière auxiliaire et la polymérisation de la résine d'imprégnation sont effectués par un seul traitement HF.Preferably, a reinforcement is used by adding an auxiliary material combined with the impregnation. In this case, the sealing of the auxiliary material and the polymerization of the impregnation resin are carried out by a single HF treatment.
La résine d'imprégnation est de préférence une résine thermo-durcissable telle qu'une résine acrylique, d'urephormol, de melamine phormol, une résine phénolique ou encore des combinaisons de telles résines.The impregnation resin is preferably a thermosetting resin such as an acrylic resin, of urephormol, of melamine phormol, a phenolic resin or also combinations of such resins.
D'autres réalisations et avantages de l'invention ressortiront de la description qui va suivre et en se référant aux dessins annexés sur lesquels :
- la figure 1 est une vue en plan d'une découpe de carton pré-rainée traitée suivant le procédé selon l'invention,
- la figure 2 est une vue en perspective schématique d'un outil de traitement HF pour la mise en œuvre - d'un mode de réalisation préféré du procédé selon l'invention et
- la figure 3 est une vue en perspective schématique d'un outil HF pour le durcissement d'une résine d'imprégnation utilisée suivant un autre mode de réalisation du procédé selon l'invention.
- FIG. 1 is a plan view of a pre-grooved cardboard blank treated according to the method according to the invention,
- FIG. 2 is a schematic perspective view of an HF processing tool for implementing - a preferred embodiment of the method according to the invention and
- Figure 3 is a schematic perspective view of an HF tool for curing an impregnation resin used according to another embodiment of the method according to the invention.
A la figure 1, on voit une découpe en carton 1 découpée et pré-rainée d'une manière classique pour former une boîte de présentation parallélépipédique. Cette découpe 1 présente des flancs 2 à 5 destinés à former les parois latérales, arrière et avant de la boîte. Les flancs sont séparés par des rainages 6 à 8. De plus, ces flancs portent à leurs extrémités supérieures et inférieures des languettes 9 à 15 destinées à former le fond et le couvercle de la boîte. Ces languettes sont séparées desdits flancs 2 à 5 par des rainages 16 à 22. La languette 10 et le flanc 5 comprennent de plus une patte de scellage 23 et 24 respectivement.In Figure 1, we see a cardboard blank 1 cut and pre-grooved in a conventional manner to form a parallelepipedic presentation box. This cut 1 has sides 2 to 5 intended to form the side, rear and front walls of the box. The flanks are separated by grooves 6 to 8. In addition, these flanks carry at their upper and
La découpe 1 est réalisée à partir d'un carton de grammage inférieur à 500 g. pour permettre un découpage et un rainage classiques par des moyens mécaniques travaillant à une vitesse élevée. De plus, le carton peut ainsi être imprimé suivant un procédé offset rapide et économique.Cutout 1 is made from cardboard with a grammage of less than 500 g. to allow conventional cutting and creasing by mechanical means working at high speed. In addition, the cardboard can thus be printed using a fast and economical offset process.
Pour réaliser, à partir de cette découpe 1, une boîte d'une résistance mécanique très élevée, on renforce suivant le procédé selon l'invention sélectivement les parties non traversées par les rainages 6 à 8 et 16 à 22 des flancs 2 à 8 et des languettes 9 à 15. Dans le mode de réalisation représenté à la figure 1, seuls les flancs 2 à 5 et la languette 10 sont renforcés comme représenté schématiquement en 25 à 29. La pratique a démontré qu'un tel renforcement est suffisant pour augmenter la résistance mécanique de la boîte obtenue dans des proportions considérables. Mais on peut bien entendu renforcer la totalité des flancs et des languettes de la découpe en carton 1.To make, from this cutout 1, a box of very high mechanical strength, the parts not crossed by the grooves 6 to 8 and 16 to 22 of the sides 2 to 8 are reinforced according to the method according to the invention.
Suivant le procédé selon l'invention, on imprègne la totalité de la surface de la découpe de carton avec une résine thermo-durcissable. Ensuite, on ne soumet que les parties à renforcer au traitement HF produisant ainsi une polymérisation et un durcissement localisé de la résine tandis que les bourrelets de pliage de la découpe ne sont pas affectés par ce traitement et permettent ainsi une mise en forme par des moyens mécaniques de la boîte.According to the method according to the invention, the entire surface of the cardboard blank is impregnated with a thermosetting resin. Then we only submit the parts to strengthen to the HF treatment thus producing a polymerization and a localized hardening of the resin while the folding beads of the cutout are not affected by this treatment and thus allow shaping by mechanical means of the box.
De préférence, on utilise pour cette imprégnation des résines thermodurcissables telles que des résines acryliques, d'urephormol, de mélamine phormol, une résine phénolique ou encore des combinaisons de telles résines. Les catalyseurs utilisés avec ces résines déterminent la rigidité finale des parties traitées de la découpe de carton.Preferably, thermosetting resins such as acrylic, urephormol, melamine phormol resins, phenolic resin or combinations of such resins are used for this impregnation. The catalysts used with these resins determine the final stiffness of the treated parts of the cardboard blank.
Pour le traitement HF dans ces deux derniers modes de réalisation, on utilise un outil HF tel que représenté à la figure 3. A cette figure, on voit de nouveau le marbre supérieur 38 d'une presse HF classique non représentée en détail ici. Le marbre 36 comporte sur sa face inférieure pour chaque partie à renforcer 25 à 29 (figure 1) un outil HF séparé 37 à 40 constitué par un cadre rectangulaire d'un profilé. Chaque cadre comprend une série de traverses longitudinales et transversales 42 et 43 respectivement. La pratique a démontré qu'un tel outil permet de réaliser une polymérisation et un durcissement de la résine d'imprégnation dans les parties à renforcer 25 à 29 d'une manière suffisant pour améliorer considérablement la rigidité de la découpe de carton 1.For the HF treatment in these last two embodiments, an HF tool is used as shown in FIG. 3. In this figure, we can once again see the
Suivant un mode de réalisation préféré du procédé selon l'invention, on combine le renforcement sélectif par apport de découpes en matière auxiliaire avec le renforcement par imprégnation et durcissement localisé. Dans ce cas, on imprègne d'abord la découpe en carton 1 avec une résine convenable. Ensuite, on met en place les découpes de matière auxiliaire et dans une autre phase, on applique un traitement HF produisant le scellage des découpes et le durcissement localisé de la résine. Cette opération peut être, le cas échéant, effectuée en une seule phase et avec un seul outil HF convenable.According to a preferred embodiment of the method according to the invention, the selective reinforcement is combined by providing cuts in auxiliary material with the reinforcement by localized impregnation and hardening. In this case, the cardboard blank 1 is first impregnated with a suitable resin. Then, the auxiliary material cuts are put in place and in another phase, an HF treatment is applied which produces the sealing of the cuts and the localized hardening of the resin. This operation can, if necessary, be carried out in a single phase and with a single suitable HF tool.
Cet outil peut être du type représenté à la figure 3. Il assure alors, avec un réglage convenable de la presse HF, simultanément le scellage des découpes de matière auxiliaire et la polymérisation ainsi que le durcissement de la résine d'imprégnation dans les parties à renforcer 25 à 29. On peut bien entendu réaliser également le scellage des découpes de matière auxiliaire et la polymérisation de la résine d'imprégnation dans deux phases successives et avec deux outils différents tels que représentés aux figures 2 et 3 respectivement.This tool can be of the type shown in FIG. 3. It then ensures, with a suitable adjustment of the HF press, simultaneously the sealing of the auxiliary material cuts and the polymerization as well as the hardening of the impregnation resin in the parts to be reinforce 25 to 29. It is of course also possible to seal the cutouts of auxiliary material and the polymerization of the impregnation resin in two successive phases and with two different tools as shown in FIGS. 2 and 3 respectively.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT84401449T ATE37003T1 (en) | 1983-07-18 | 1984-07-06 | PROCESS FOR STIFFENING CARTON BOXES. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8312039A FR2553028B1 (en) | 1983-07-18 | 1983-07-18 | PROCESS FOR REINFORCING CARDBOARD BOXES |
FR8312039 | 1983-07-18 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0132191A2 EP0132191A2 (en) | 1985-01-23 |
EP0132191A3 EP0132191A3 (en) | 1986-01-29 |
EP0132191B1 true EP0132191B1 (en) | 1988-09-07 |
Family
ID=9290986
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP84401449A Expired EP0132191B1 (en) | 1983-07-18 | 1984-07-06 | Method of reinforcing cardboard boxes |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0132191B1 (en) |
AT (1) | ATE37003T1 (en) |
DE (1) | DE3473865D1 (en) |
FR (1) | FR2553028B1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111994412A (en) * | 2020-08-06 | 2020-11-27 | 潍坊和合包装有限公司 | Circulation multipurpose corrugated paper carton |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2561583A1 (en) * | 1984-03-23 | 1985-09-27 | Norembal Cartonnerie | COMPOSITE MATERIAL FOR PACKAGING AND PACKAGING IN THIS MATERIAL |
US4566626A (en) * | 1985-03-26 | 1986-01-28 | The Mead Corporation | End loading can carton |
WO1998026989A1 (en) * | 1996-12-14 | 1998-06-25 | Leifeld & Lemke Fuelltechnik G | Method for producing collapsible cardboard boxes and base material and intermediate products for this |
GB9711165D0 (en) * | 1997-05-31 | 1997-07-23 | Morrison Corrugated Products L | Containers |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1480809A (en) * | 1921-12-02 | 1924-01-15 | Elie W Labombarde | Set-up paper box |
US1569952A (en) * | 1923-01-04 | 1926-01-19 | Jr William W Dickinson | Apparatus for burning bricks |
US2556915A (en) * | 1946-06-19 | 1951-06-12 | Waldorf Paper Prod Co | Reinforced carton |
US3653578A (en) * | 1969-12-29 | 1972-04-04 | Inland Container Corp | Container and method of making same |
US4337887A (en) * | 1979-09-18 | 1982-07-06 | Weyerhaeuser Company | Reinforced half slotted container |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1365510A (en) * | 1919-01-25 | 1921-01-11 | Leiman Henry | Cigar-box |
GB996411A (en) * | 1963-09-18 | 1965-06-30 | Mardon Son & Hall Ltd | Improved method of heat sealing surfaces together |
US3397831A (en) * | 1967-09-01 | 1968-08-20 | Inland Container Corp | Reinforced bulk pack container |
SE360619B (en) * | 1972-12-12 | 1973-10-01 | P Engman | |
FR2322800A1 (en) * | 1975-09-05 | 1977-04-01 | Dupuy Ets | PACKAGING |
-
1983
- 1983-07-18 FR FR8312039A patent/FR2553028B1/en not_active Expired
-
1984
- 1984-07-06 DE DE8484401449T patent/DE3473865D1/en not_active Expired
- 1984-07-06 EP EP84401449A patent/EP0132191B1/en not_active Expired
- 1984-07-06 AT AT84401449T patent/ATE37003T1/en not_active IP Right Cessation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1480809A (en) * | 1921-12-02 | 1924-01-15 | Elie W Labombarde | Set-up paper box |
US1569952A (en) * | 1923-01-04 | 1926-01-19 | Jr William W Dickinson | Apparatus for burning bricks |
US2556915A (en) * | 1946-06-19 | 1951-06-12 | Waldorf Paper Prod Co | Reinforced carton |
US3653578A (en) * | 1969-12-29 | 1972-04-04 | Inland Container Corp | Container and method of making same |
US4337887A (en) * | 1979-09-18 | 1982-07-06 | Weyerhaeuser Company | Reinforced half slotted container |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111994412A (en) * | 2020-08-06 | 2020-11-27 | 潍坊和合包装有限公司 | Circulation multipurpose corrugated paper carton |
Also Published As
Publication number | Publication date |
---|---|
EP0132191A3 (en) | 1986-01-29 |
FR2553028B1 (en) | 1988-12-16 |
ATE37003T1 (en) | 1988-09-15 |
DE3473865D1 (en) | 1988-10-13 |
EP0132191A2 (en) | 1985-01-23 |
FR2553028A1 (en) | 1985-04-12 |
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