FR2666356A1 - Corrugated cardboard sheet structure with triple corrugations - Google Patents

Corrugated cardboard sheet structure with triple corrugations Download PDF

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Publication number
FR2666356A1
FR2666356A1 FR9011051A FR9011051A FR2666356A1 FR 2666356 A1 FR2666356 A1 FR 2666356A1 FR 9011051 A FR9011051 A FR 9011051A FR 9011051 A FR9011051 A FR 9011051A FR 2666356 A1 FR2666356 A1 FR 2666356A1
Authority
FR
France
Prior art keywords
thickness
corrugated cardboard
strata
external
grooves
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
FR9011051A
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French (fr)
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FR2666356B1 (en
Inventor
Petiard Jacques
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.)
Auvergne SA Carton
Original Assignee
Auvergne SA Carton
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 Auvergne SA Carton filed Critical Auvergne SA Carton
Priority to FR9011051A priority Critical patent/FR2666356A1/en
Priority to ES91420334T priority patent/ES2075393T3/en
Priority to AT91420334T priority patent/ATE125319T1/en
Priority to DE69111447T priority patent/DE69111447T2/en
Priority to EP91420334A priority patent/EP0532813B1/en
Publication of FR2666356A1 publication Critical patent/FR2666356A1/en
Application granted granted Critical
Publication of FR2666356B1 publication Critical patent/FR2666356B1/fr
Granted legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/30—Multi-ply
    • D21H27/40—Multi-ply at least one of the sheets being non-planar, e.g. crêped

Landscapes

  • Laminated Bodies (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)

Abstract

The invention relates to laminated products and its subject is a corrugated cardboard sheet with triple corrugations. Corrugated cardboard sheet comprising three layers of corrugations, including two outer ones (1'' and 3'') and an inner one (2'') which are separated by a cardboard sheet, chiefly characterised in that, for a given thickness (E) of the sheet, the outer layers (1'' and 3'') are intersected by a trellis consisting of the inner layer (2''). The thicknesses (e1 and e3) of the outer layers are substantially equal, the thickness (e2) of the inner layer being at least equal to half the total thickness (E) of the sheet. Application to packaging and wrapping.

Description

La présente invention est du domaine des produits stratifiés, et plus particulièrement a pour objet une plaque de carton ondulé à triple cannelures. The present invention is in the field of laminate products, and more particularly relates to a corrugated cardboard plate with triple grooves.

On connaît les plaques de carton ondulé de forte épaisseur à triple cannelures du genre de celles qui cumulent trois strates de cannelures d'épaisseurs égales, ou de celles qui cumulent trois strates de cannelures dissymetriques, les différentes strates étant séparées ou recouvertes par une feuille de papier fort. We know sheets of corrugated cardboard of great thickness with triple grooves of the kind of those which cumulate three strata of grooves of equal thickness, or those which cumulate three strata of asymmetrical grooves, the different strata being separated or covered by a sheet of strong paper.

Un inconvénient de ces types de plaques de carton ondulé est la mauvaise planélté que présente la face de la plaque jouxtant des cannelures assez grosses, ces cannelures formant de légères ondulations sur les feuilles de papier dont elles sont recouvertes. A drawback of these types of corrugated cardboard plates is the poor planeness of the face of the plate adjoining fairly large grooves, these grooves forming slight undulations on the sheets of paper with which they are covered.

Un autre inconvénient est la faible résistance à la pénétration des surfaces extérieures des plaques, due à l'espace laissé par les cannelures entreelles, lorsque la distance séparant chaque crête voisine des dites cannelures est importante. L'altération des surfaces extérieures de la dite plaque due à ces inconvénients entraîne une diminution de la rigidité de la plaque. Another drawback is the low resistance to penetration of the outer surfaces of the plates, due to the space left by the grooves between them, when the distance separating each neighboring peak from said grooves is significant. The alteration of the outer surfaces of said plate due to these drawbacks results in a reduction in the rigidity of the plate.

Le but de la présente invention est de proposer une plaque de carton ondulé à triple cannelures présentant une meilleure planéité de ses deux faces extérieures et une plus grande résistance à la pénétration de celles-ci. The object of the present invention is to provide a corrugated cardboard plate with triple grooves having a better flatness of its two outer faces and a greater resistance to the penetration thereof.

Un autre but de la présente invention est l'augmentation considérable de la rigidité globale de la dite plaque, plus particulièrement sa résistance à la flexion notamment dans le sens perpendiculaire aux cannelures. Another object of the present invention is the considerable increase in the overall rigidity of said plate, more particularly its resistance to bending in particular in the direction perpendicular to the grooves.

Une plaque de carton ondulé à triple cannelures selon la présente invention, du genre de celles comportant deux strates externes de cannelures et une strate interne, les dites strates étant séparées ou recouvertes par une feuille de papier, est principalement caractérisée dans sa plus grande généralité en ce que pour une épaisseur donnée de la plaque, ses strates externes, jouant le rôle de structures charpentées, c'est-à-dire de parties travaillant en traction, sont entretoisées à la manière des fermes ou des poutres en I par exemple, par un treillis constitué par la strate centrale, de telle sorte que, comme dans les poutres ou autres éléments de charpente, la résistance à la traction des strates externes se traduit globalement pour la plaque de carton ondulé, en une résistance à la fléxion ; or il se trouve que dans la fabrication du carton ondulé, des ondulations de faible amplitude (strate de faible épaisseur) sont ausi de faible espacement, ce qui a pour conséquence une structure de densité relativement élevée, tandis qu'inversement des ondulations de grande amplitude (strate de forte épaisseur) sont de grand espacement, et conséquemment de plus faible densité. Ainsi la structure proposée par l'invention est assez analogue à celle d'un ensemble de fermes avec des parties externes de densité plus élevée et une partie centrale de densité plus faible. A sheet of corrugated cardboard with triple flutes according to the present invention, of the kind of those comprising two external layers of flutes and an internal layer, said strata being separated or covered by a sheet of paper, is mainly characterized in its greatest generality by that for a given thickness of the plate, its external layers, playing the role of structured structures, that is to say of parts working in traction, are braced in the manner of trusses or I-beams for example, by a trellis formed by the central layer, so that, as in beams or other structural elements, the tensile strength of the external layers is generally reflected for the corrugated board, in resistance to bending; Now it turns out that in the manufacture of corrugated cardboard, corrugations of small amplitude (thin layer) are also of small spacing, which results in a relatively high density structure, while conversely corrugations of large amplitude (very thick stratum) are of great spacing, and consequently of lower density. Thus the structure proposed by the invention is quite similar to that of a set of trusses with external parts of higher density and a central part of lower density.

Suivant une disposition caractéristique plus particulière, les strates externes sont d'épaisseur sensiblement égales, tandis que l'épaisseur de la strate interne est au moins égale à la moitié de l'épaisseur totale de la dite plaque carton ondulé. En d'autres termes, l'épaisseur de l'une quelconque des strates externes est au plus égale à la moitié de l'épaisseur de la strate interne, et par épaisseurs sensiblement égales on entend que le rapport entre l'épaisseur d'une des strates externes et l'épaisseur de l'autre strate externe est compris entre 0,75 et 1,35. According to a more specific characteristic arrangement, the outer layers are of substantially equal thickness, while the thickness of the inner layer is at least equal to half the total thickness of said corrugated cardboard plate. In other words, the thickness of any one of the outer layers is at most equal to half the thickness of the inner layer, and by substantially equal thicknesses is meant that the ratio between the thickness of a of the outer layers and the thickness of the other outer layer is between 0.75 and 1.35.

A titre d'exemple de réalisation, l'épaisseur de la strate interne est égale à 6,5 millimètres et l'épaisseur de la plaque est égale à 12 millimètres, les strates externes ayant une épaisseur de l'ordre de 3 millimètres.  As an exemplary embodiment, the thickness of the internal layer is equal to 6.5 millimeters and the thickness of the plate is equal to 12 millimeters, the external layers having a thickness of the order of 3 millimeters.

La présente invention sera mieux comprise et des détails en relevant apparaîtront à la description qui va être faite d'une forme préférée de réalisation, en relation avec les figures de la planche annexee, dans laquelle
La figure 1 est une vue en coupe d'une plaque de carton ondulé à triple cannelures d'égales épaisseurs, de l'art antérieur.The present invention will be better understood and details will be apparent from the description which will be given of a preferred embodiment, in relation to the figures in the appended plate, in which
Figure 1 is a sectional view of a corrugated cardboard plate with triple grooves of equal thickness, of the prior art.

La figure 2 est une vue en coupe d'une autre plaque de carton ondulé à triple cannelures dissymétrique relevant aussi de l'art antérieur. Figure 2 is a sectional view of another sheet of corrugated cardboard with asymmetrical triple grooves also pertaining to the prior art.

La figure 3 est une vue en coupe d'une plaque de carton ondulé à triple cannelures conforme à la présente invention. Figure 3 is a sectional view of a corrugated cardboard with triple grooves according to the present invention.

Les figures 1 à 3 sont accompagnes d'un encadré illustrant schématiquement les différences de densité des strates, pour chacune des vues en coupe. Figures 1 to 3 are accompanied by a box diagrammatically illustrating the differences in density of the strata, for each of the section views.

La figure 4 est une vue en perspective de la plaque de la figure 3. FIG. 4 is a perspective view of the plate of FIG. 3.

Sur l'ensemble des figures on reconnaîtra une plaque de carton à triple cannelures composée de feuilles de papier ondulé, telles que 6 comprises entre et collées contre des feuilles de papier plates telles que 7. In all of the figures, we can recognize a cardboard plate with triple grooves made up of sheets of corrugated paper, such as 6 between and glued against flat sheets of paper such as 7.

I1 apparaît bien en comparant la disposition des strates 1, 2, 3 et 1', 2', 3' et 1", 2", 3" des plaques de carton ondulé à triple cannelures des fig. 1 et 2, relevant de l'art antérieur, avec celle de la plaque de la fig. 3 relevant de l'invention, toutes ces plaques étant d'égales épaisseurs totales E, que la plaque de l'invention comporte des strates externes 1" et 3", d'épaisseurs el et e3, beaucoup plus minces, mais de densité plus forte, que la strate interne d'épaisseur e2, ce qui confère à cette plaque sa structure dite charpentée. It appears well by comparing the arrangement of the layers 1, 2, 3 and 1 ′, 2 ′, 3 ′ and 1 ", 2", 3 ″ of the corrugated sheets of triple corrugated board of FIGS. 1 and 2, relating to the prior art, with that of the plate of Fig. 3 relating to the invention, all these plates being of equal total thickness E, that the plate of the invention comprises external strata 1 "and 3", of thicknesses el and e3, much thinner, but of higher density, than the internal layer of thickness e2, which gives this plate its so-called structured structure.

Les épaisseurs des strates de la plaque de lLin;vention répondent aux définitions données plus haut, à savoir
0,75 < el/e2 < 1,35 et
e2 > E/2
Grâce à la disposition caractéristique de l'invention, il a été constaté un accroissement considérable de la résistance à la pénétration, et surtout de la résistance à la flexion ; on a aussi amélioré la planéité des faces.The thicknesses of the strata of the linin; vention correspond to the definitions given above, namely
0.75 <el / e2 <1.35 and
e2> E / 2
Thanks to the characteristic arrangement of the invention, a considerable increase has been observed in the resistance to penetration, and above all in the resistance to bending; we also improved the flatness of the faces.

Sur la fig. 4 une plaque de carton particulier relevant de l'invention comporte les caractéristiques dimensionnelles suivantes : el = 3 mm, e2 = 6,5 mm, e3 = 4 mm, l'épaisseur totale E étant de 13,5 mm, les distances séparant les crêtes des ondulations sont respectivement dl = 6,4 mm, d2 = 15 mm, d3 = 7,5 mm. In fig. 4 a particular cardboard plate pertaining to the invention has the following dimensional characteristics: el = 3 mm, e2 = 6.5 mm, e3 = 4 mm, the total thickness E being 13.5 mm, the distances separating the crests of the corrugations are respectively dl = 6.4 mm, d2 = 15 mm, d3 = 7.5 mm.

Bien que l'on ait décrit et représenté une forme préférée de réalisation, il doit être compris que la portée de la présente invention n'est pas limitée à cette forme mais qu'elle s'étend à toute plaque de carton ondulé ou matériau stratifié analogue comportant les caractéristiques énoncées plus haut.  Although a preferred embodiment has been described and shown, it should be understood that the scope of the present invention is not limited to this form but that it extends to any corrugated board or laminated material analog having the characteristics set out above.

Claims (5)

REVENDICATIONS 1.- Plaque de carton ondulé à triple cannelures comportant1.- Corrugated cardboard plate with triple grooves comprising deux strates externes (1" et 3") de cannelures et une two external layers (1 "and 3") of grooves and one strate interne (2") de cannelures, les dites strates internal layer (2 ") of grooves, the so-called layers étant séparées par une feuille de carton, caractérisée being separated by a sheet of cardboard, characterized en ce que pour une épaisseur in that for a thickness donnée de la plaque, ses strates externes, jouant le data of the plate, its external strata, playing the rôle de structures charpentée, sont entretoisées par role of structured structures, are braced by un treillis constitué par la strate centrale, d'où il a trellis formed by the central stratum, from where it résulte que, comme dans les poutres ou autres éléments results that, as in beams or other elements de charpente, la résistance à la traction des strates structural, tensile strength of strata externes se traduit globalement pour la plaque de carton overall results for the cardboard plate ondulé, en une résistance à la flexion ; et que la wavy, in flexural strength; and that the structure de la plaque est assez analogue à celle d'un plate structure is quite similar to that of a ensemble de fermes avec des parties externes de densité set of trusses with external density parts plus élevée et une partie centrale de densité plus higher and a central part of higher density faible. low. 2.- Plaque de carton ondulé selon la revendication 1,2. Corrugated cardboard plate according to claim 1, caractérisée : characterized: en ce que les strates externes in that the outer strata (1" et 3") sont d'epaisseur el et e3 sensiblement égale, (1 "and 3") are of substantially equal thickness e1 and e3, et and en ce que l'épaisseur de la in that the thickness of the strate interne (2") e2 est au moins égale à la moitié internal stratum (2 ") e2 is at least half de l'épaisseur totale E de la dite plaque en carton. of the total thickness E of said cardboard plate. 3.- Plaque de carton ondulé selon la revendication 2, carac3. Corrugated cardboard plate according to claim 2, charac térisée : terrified: en ce que plus particulièrement in that more particularly le rapport entre l'épaisseur d'une quelconque des strates the ratio of the thickness of any of the strata externes (1" ou 3") et l'epaisseur de l'autre strate external (1 "or 3") and the thickness of the other layer externe (1" ou 3") est compris entre 0,75 et 1,35. external (1 "or 3") is between 0.75 and 1.35. 4.- Plaque de carton ondulé selon la revendication 2, carac 4. Corrugated cardboard plate according to claim 2, charac térisée :  terrified: en ce que l'épaisseur e2 de in that the thickness e2 of la strate interne (2") est égale à 6,5 millimètres. the internal layer (2 ") is equal to 6.5 millimeters. 5.- Plaque de carton ondulé selon l'une quelconque des5.- Corrugated cardboard plate according to any one of revendications précédentes, caractérisée previous claims, characterized en ce que ltépaisseur de l'une in that the thickness of one quelconque des strates externes (l" ou 3") est au plus any of the outer strata (l "or 3") is at most égale à la moitié de l'épaisseur de la strate interne equal to half the thickness of the inner layer (e2).  (e2).
FR9011051A 1990-08-31 1990-08-31 Corrugated cardboard sheet structure with triple corrugations Granted FR2666356A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
FR9011051A FR2666356A1 (en) 1990-08-31 1990-08-31 Corrugated cardboard sheet structure with triple corrugations
ES91420334T ES2075393T3 (en) 1990-08-31 1991-09-18 STRUCTURE OF CORRUGATED CARDBOARD PLATE WITH TRIPLE GUTTER.
AT91420334T ATE125319T1 (en) 1990-08-31 1991-09-18 CORRUGATED CARDBOARD PANEL STRUCTURE WITH THREE LAYERS.
DE69111447T DE69111447T2 (en) 1990-08-31 1991-09-18 Corrugated cardboard panel structure with three layers.
EP91420334A EP0532813B1 (en) 1990-08-31 1991-09-18 Panelstructure of corrugated paperboard with these layers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9011051A FR2666356A1 (en) 1990-08-31 1990-08-31 Corrugated cardboard sheet structure with triple corrugations

Publications (2)

Publication Number Publication Date
FR2666356A1 true FR2666356A1 (en) 1992-03-06
FR2666356B1 FR2666356B1 (en) 1995-01-27

Family

ID=9400115

Family Applications (1)

Application Number Title Priority Date Filing Date
FR9011051A Granted FR2666356A1 (en) 1990-08-31 1990-08-31 Corrugated cardboard sheet structure with triple corrugations

Country Status (5)

Country Link
EP (1) EP0532813B1 (en)
AT (1) ATE125319T1 (en)
DE (1) DE69111447T2 (en)
ES (1) ES2075393T3 (en)
FR (1) FR2666356A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994019538A1 (en) * 1993-02-17 1994-09-01 Printpac-Ueb Limited Case forming materials and components and structures thereof

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR804234A (en) * 1935-03-26 1936-10-19 Multi-layered paper product and its manufacturing process
GB957933A (en) * 1961-10-19 1964-05-13 Continental Oil Co Method of manufacturing improved corrugated paperboard
FR1488484A (en) * 1965-07-21 1967-11-02

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB793011A (en) * 1953-06-10 1958-04-09 Augustus Gordon Elliott Improvements in and relating to the manufacture of corrugated sheeting from paper
US3616163A (en) * 1969-07-18 1971-10-26 Atton Box Board Co Corrugated fiberboard
DE2108658A1 (en) * 1971-02-24 1972-09-07
DE2458260A1 (en) * 1974-12-10 1976-06-16 Karlheinz Schulz Compound panel for sound insulation in buildings - has offset honeycomb or corrugated layers of different thickness

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR804234A (en) * 1935-03-26 1936-10-19 Multi-layered paper product and its manufacturing process
GB957933A (en) * 1961-10-19 1964-05-13 Continental Oil Co Method of manufacturing improved corrugated paperboard
FR1488484A (en) * 1965-07-21 1967-11-02

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994019538A1 (en) * 1993-02-17 1994-09-01 Printpac-Ueb Limited Case forming materials and components and structures thereof
US5799861A (en) * 1993-02-17 1998-09-01 Carter Holt Harvey Limited Case forming materials and components and structures thereof

Also Published As

Publication number Publication date
ES2075393T3 (en) 1995-10-01
DE69111447T2 (en) 1996-03-21
FR2666356B1 (en) 1995-01-27
DE69111447D1 (en) 1995-08-24
EP0532813A1 (en) 1993-03-24
ATE125319T1 (en) 1995-08-15
EP0532813B1 (en) 1995-07-19

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