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Sommaire du brevet 2216841 

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Disponibilité de l'Abrégé et des Revendications

L'apparition de différences dans le texte et l'image des Revendications et de l'Abrégé dépend du moment auquel le document est publié. Les textes des Revendications et de l'Abrégé sont affichés :

  • lorsque la demande peut être examinée par le public;
  • lorsque le brevet est émis (délivrance).
(12) Demande de brevet: (11) CA 2216841
(54) Titre français: AME EN NID D'ABEILLES D'UN MATERIAU ETANCHE A L'HUMIDITE
(54) Titre anglais: HONEYCOMB CORE OF A MOISTURE SEALING MATERIAL
Statut: Réputée abandonnée et au-delà du délai pour le rétablissement - en attente de la réponse à l’avis de communication rejetée
Données bibliographiques
(51) Classification internationale des brevets (CIB):
  • B32B 03/12 (2006.01)
  • E04C 02/36 (2006.01)
(72) Inventeurs :
  • DIDERICH, JOHANNES PHILIPPUS LUDOVICUS MARIA
(73) Titulaires :
  • BESIN B.V.
(71) Demandeurs :
  • BESIN B.V.
(74) Agent: KIRBY EADES GALE BAKER
(74) Co-agent:
(45) Délivré:
(86) Date de dépôt PCT: 1996-03-22
(87) Mise à la disponibilité du public: 1996-10-03
Licence disponible: S.O.
Cédé au domaine public: S.O.
(25) Langue des documents déposés: Anglais

Traité de coopération en matière de brevets (PCT): Oui
(86) Numéro de la demande PCT: PCT/NL1996/000124
(87) Numéro de publication internationale PCT: NL1996000124
(85) Entrée nationale: 1997-09-29

(30) Données de priorité de la demande:
Numéro de la demande Pays / territoire Date
9500623 (Pays-Bas (Royaume des)) 1995-03-31

Abrégés

Abrégé français

Ame en nid d'abeilles constituée de bandes d'un matériau tel que la cellulose dont la résistance et/ou la forme varient en fonction de l'humidité. Lesdites bandes sont disposées en couches parmi lesquelles se trouve une couche de plastique qui peut être placée entre deux couches du matériau hydrosensible ou leur être intégrée. On peut donc ainsi former un panneau de nid d'abeille à construction en sandwich dont l'âme est en nid d'abeille et dont les plaques de couverture, collées à l'âme, sont faites du susdit matériau en cellulose, dont la résistance et/ou la forme sont sensibles à l'humidité lesdites joues formant des faces de panneau, au moins une desdites joues étant étanche à l'humidité. L'une au moins des plaques de couverture peut consister en plusieurs couches, dont une en plastique. La plaque de couverture concernée peut comprendre deux couches du matériau hydrosensible, la couche de plastique se trouvant entre elles ou leur étant intégrée.


Abrégé anglais


A honeycomb core is built up of strips made with a material such as cellulose
material, the strength and/or the shape of which is sensitive to the action of
moisture. The strips are built up in layers and comprise a layer of plastic.
The plastic layer can be located between two layers of the moisture-sensitive
material and be integral with this. With this honeycomb core a honeycomb panel
in the shape of a sandwich construction can be built up, which comprises two
cover plates made with a material such as cellulose material, the strength
and/or the shape of which is sensitive to the action of moisture, which cover
plates form panel faces, between which the core is glued, in which at least
one of the cover plates is moisture-proof. At least one of the cover plates
can be built up in layers and can comprise a layer of plastic. The cover plate
concerned can comprise two layers of the moisture-sensitive material, between
which the plastic layer thereof is located which is integral with this.

Revendications

Note : Les revendications sont présentées dans la langue officielle dans laquelle elles ont été soumises.


C L A I M S
1. Honeycomb core, built up of strips made with a
cellulose material, the strength and/or the shape of which
is sensitive to the action of moisture, wherein
the strips are built up in layers and comprise a
layer of plastic, characterized in that the plastic layer
is made of polyethene.
2. Honeycomb core according to claim 1, characterized
in that the plastic layer is located between two layers of
the cellulose material and is integral with this.
3. Honeycomb core according to claim 2, in which the
cellulose material is paper, characterized in that the
plastic layer is attached to the paper layers by melting
of the plastic.
4. Honeycomb core according to claim 3, characterized
in that the paper layers have a weight per unit of area of
between 50 and 125 g/m2, preferably of about 70 g/m2.
5. Honeycomb core according to any one of the preceding
claims, characterized in that the polyethene layer
has a weight of between 5 and 50 g/m2, preferably of about
12 g/m2.
6. Honeycomb core according to any one of the
preceding claims, characterized in that it is built up by
gluing the strips together with a moisture-resistant glue,
wherein the strips are impregnated by the glue at the

- 2 -
locations where they are glued together.
7. Honeycomb panel in the form of a sandwich
construction, comprising a honeycomb core according to any
one of the preceding claims and two cover plates which
define panel faces, between which the core is glued, and
which are made with a cellulose material, the strength
and/or the shape of which is sensitive to the action of
moisture, at least one of the cover plates being
moisture-proof,
characterized in that
at least one of the cover plates is built up in
layers and comprises a layer of plastic.
8. Honeycomb panel according to claim 7, characterized
in that the cover plate concerned comprises two layers
of the cellulose material, between which the plastic layer
thereof is located which is integral with this.
9. Honeycomb panel according to claim 8, in which the
cellulose material of the cover plates is paper, characterized
in that the plastic layer of the cover plate concerned
is attached to the paper layers thereof by melting of
the plastic.
10. Honeycomb panel according to claim 9, characterized
in that the plastic layer of the cover plate
concerned is made of polyethene.
11. Honeycomb panel according to claim 10, characterized
in that the polyethene layer of the cover plate
concerned has a weight per unit of area of between 5 and
50 g/m2, preferably of about 12 g/m2.
12. Honeycomb panel according to any one of the
claims 7-11, characterized in that the cover plates have a
weight per unit of area of between 150 and 750 g/m2.

- 3 -
13. Honeycomb panel according any one of the claims
7-12, characterized in that the cover plates and the core
are glued together with a moisture-proof glue such as
PVAC.
14. Honeycomb panel according to claim 13, characterized
in that the cover plates and the strip edges are
impregnated by the glue at the locations where they are
glued together.

Description

Note : Les descriptions sont présentées dans la langue officielle dans laquelle elles ont été soumises.


CA 02216841 1997-09-29
W 096/30202 PCTA~L96/00124
HONEYCOMB CORE OF A MOISTURE SEALING ~ATERIAL
The present invention relates to a honeycomb core, built
up of strips made with a material, such as cellulose
material, the strength and/or the shape of which is sensi-
tive to the action of moisture, and to a honeycomb panel
in the form of a sandwich construction, comprising such a
honeycomb core and two cover plates which define panel
faces, between which the core is glued.
For many uses, for example in pallets or in interior parts
for cars it is desirable that such a honeycomb core or
such a honeycomb panel is moisture-proo~ and particularly
water-proof. Moisture resistance can be achieved by using
a plastic instead of the moisture-sensitive material. Most
plastics, however, have a much lower temperature stability
than cellulose material such as, for instance paper, and
they are in most cases more expensive. Moreover, plastics
have the disadvantage that an environmentally harmful
product is obtained, and that the conventional manfactu-
ring methods which are geared to paper processing, in
particular the cutting and glueing thereof, will have to
be completely revised.
Apart from this, moisture resistance can be achieved by
impregnating the paper with a moisture-repellant means.
The usual method ~or recovering paper ~or recycling is,
however, stirring the paper to pulp in water in a so-
called pulper. Since the water cannot penetrate the im-
pregnated, moisture-repellant paper, this method is not
usable for impregnated paper. Consequently, the paper can
no longer be recovered ~rom that.
The invention aims at providing a material for the honey-
comb core and the honeycomb panel which is moisture-resis-
tant, easily workable in the usual paper processing pro-
duction processes and furthermore easily recoverable for
re-use.

CA 02216841 1997-09-29
W 096/30202 PCT~L96/00124
-- 2
For this purpose the honeycomb core according to the
invention is characterized in that the strips are built up
in layers and comprise a layer of plastic, and the honey-
comb panel according to the invention is characterized in
that at least one of the cover plates is moisture-proof.
The core and the panel according to the invention are
characterized in that the strips are built up in layers
and comprise a layer of plastic, and the panel according
to the invention is characterized in that at least one of
the cover plates is moisture-proof.
The core and the panel according to the invention a-e thus
provided with moisture-sealed layers. Moisture, and in
particular water, can only affect the exposed outer surfa-
ce of the core or the panel, and cannot reach the material
which is closed in, for instance by further processing and
mounting of the material. Apart from that the moisture-
sensitive material can be recovered for re-use.
All the strips of the honeycomb core comprise the plastic
layer so that the core or the panel can be cut to an
arbitrary size and still remain moisture-proof.
If both cover plates of the panel are thus moisture-proof,
these will cooperate with the moisture-sealing layers of
the honeycomb core, so that the honeycomb cells are sepa-
rated from the outside and from each other. If the panel
is now damaged locally and a moisture sealing layer is
broken there, the moisture can indeed penetrate the cell
there, and moisten the paper layers inside it, but the
moisture cannot spread any further, because the cell in
question is isolated from its surroundings by moisture-
sealing layers. The moisture impairment in local damage is
thus localised.
The cover plates of the honeycomb panel can also be manu-

-
CA 02216841 1997-09-29
W O 96/30202 PCT~L96/00124
factured with a material such as cellulose material, the
strength and/or the form of which is sensitive to the
action of moisture. In that case it is preferable that at
least one of the cover plates is built up in layers and
comprises a layer of plastic. The material of the cover
plates of such a panel, for example paper, can also be
recovered for re-use.
The cover plates can, however, be made of another material
which is or is made moisture-proof, such as, for instance,
wood, metal, plastic, coated paper or laminates thereof,
if this material is inherently moisture-resistant. For the
purpose of re-use the paper should be separable from these
materials.
Preferably the plastic layer of the honeycomb core is to
be found between two layers of the moisture-sensitive
material of the strips, and is thus integrated with it. If
the plastic layer is built in in that way in the moisture-
sensitive material of the core strips, the surface thereofretains the character of moisture-sensitive material. In
the case of paper the strips can be processed in the usual
ways as paper, for example by trimming, cutting and glu-
eing, for the production of the honeycomb core and with
that the honeycomb panel.
Preferably the cover plate concerned of the honeycomb
panel comprises two layers of the moisture-sensitive
material, between which the plastic layer thereof is
located, which is integral with that. By building in the
plastic layer here as well, the cover plate surfaces
retain the character of the moisture-sensitive material,
and the cover plates can be cut, glued and processed
further in the usual ways for producing honeycomb panels.
The principal faces of the produced panels then also
retain the character of the moisture-sensitive material
(for example paper) so that these panels can then be cut

CA 02216841 1997-09-29
W 096/30202 PCT~L96/00124
in the usual m~nne~ to size, and so that for example paper
honeycomb blocks or honeycomb panel parts can be glued
against them, with the usual glueing methods. Common
products such as pallets and interior parts for cars can
be made without radical production changes.
It is preferable that the built-in plastic layers are
melted together with the paper layers resting against
them. A paper product melted in that way can easily be
used as initial material in the usual production processes
for the honeycomb core and the honeycomb panel based on
paper.
The paper layers of the core material can have a surface
density between 50 and 125 g/m2, and preferably have a
surface density of about 70 g/m2, whereas the cover plates
of the honeycomb panel have a total surface density of
between 150 and 750 g/m2. In that way an optimal balance
between weight and strength of the material is attained.
It is preferable that the plastic layers used are made o~
polyethene. This material can be melted easily with paper.
The polyethene layers have a surface density between 5 and
50 g/m2 and preferably have a surface density of about 12
g/m2. Layer densities like this melt well with paper and
are not penetrable by moisture.
The honeycomb core can be built up by glueing the strips
together with a moisture-resistant glue, and the cover
plates of the honeycomb panel can be glued together with
the honeycomb core thereof with a moisture-resistant glue.
In this way the structure of the core or the panel remains
intact when becoming moist and local moisture damage to
the panel is fixed and located in an effective manner. A
suitable moisture-resistant glue is, for example, polyvi-
nyl acetate glue.

CA 02216841 1997-09-29
W 096/30202 PCT~L96/00124
Preferably a glue is selected which impregnates the strips
and the cover plates at the glue locations. Then the strip
and cover plate material cannot absorb any moisture at the
glueing sites. In this way, moisture migration between
adjacent honeycomb cells, parallel to the glueing bonds
and the moisture-sealing layers right through the materi-
al, is blocked in an effective way.
Polyethene and similar polymers, just as glue residues and
small paper fractions impregnated with water-resistant
glue, can easily be separated from the paper in a pulper,
by scooping it out of the pulp slurry. The separated pulp
can thus easily be recovered for re-use in paper products.
The invention will be elucidated below with reference to
an exemplary embodiment which is illustrated in the accom-
panying drawings, in which:
figure 1 is a perspective view of a honeycomb panel provi-
ded with a honeycomb core;
figure 2 is a top view of a honeycomb core in a folded-up
position;
figure 3 is a top view of a honeycomb core in a partially
drawn out position;
figure 4 is a top view of a honeycomb core in fully drawn
out position; and
figure 5 is a cross sectional view of one of the paper
strips of which the honeycomb core according to the inven-
tion is built up.
Figure 1 shows a honeycomb panel 1 which comprises a
honeycomb core 2 and cover plates 3 and 4 glued to it.
The honeycomb core 2 is built up of trapezoid-shaped

CA 022l684l l997-09-29
W 096/30202 PCT~L96/00124
corrugated strips 5 which consist for the most part of
paper. Instead of a light or heavy paper quality (card-
board) another cellulose material can be used.
t
In the figures 2, 3 and 4 top views of the honeycomb core
are shown in folded-up and partially and fully drawn out
positions. The strips 5 extend in longitudinal direction
along each other, and parts 6 thereof are glued at least
in part along their longitudinal direction, alternately to
the adjacent strips on both sides, for example with poly-
vinyl acetate glue (PVAC glue), the parts 7, of approxi-
mately the same length, located between the glued parts 6,
re~;n;ng unglued. If the honeycomb core is drawn o~t in a
direction perpendicular to the plane of the strips 5
(figure 3), a grid of more or less regular hexagonal cells
8 is formed, with approximately the same cell diameter D,
the cell sides of which being formed by the glued parts 6
and the intermediate parts 7 (figure 4). The cells can,
for instance, be 13 mm in diameter D and 50 mm in height
(strip width).
The strips 5 form the walls 9 of the cells 8 of the
hexagonal grid and can be folded at their ends and be
turned back for forming the adjacent strip. After stret-
ching the honeycomb core a honeycomb panel can be formedwith it by glueing (for example with PVAC glue) the cover
plates 3 and 4 to the upper and lower edges of the cell
walls 9 (figure 1). It is, however, also possible to
provide a honeycomb panel with a honeycomb core 2 accor-
ding to the invention, in which a cover plate 3 is gluedto only one side of the core 2.
The cells of the honeycomb panel 1 can be empty or filled
with an insulating material. The panel can be manufactured
cheaply of inherently flexurally slack material, but has
as a whole a high resistance to compression in a direction
perpendicular to the principal plane and has a high

CA 02216841 1997-09-29
W O 96/30202 PCTANL96/00124
flexural stiffness.
The structure of the material of the strip 5 is shown
schematically in figure 5. The strips 5 are layered and
consist of two layers of paper 10 and 11 (another cellulo-
se material is also possible), between which there is a
layer of polyethene 12, which is melted together with the
paper layers. Of course another plastic, in particular a
polymer, can be used. The polyethene layer 12 has a surfa-
ce density between 5 and 50 g/m2 and preferably has a
density of approximately 12 g/m2. The paper layers 10 and
11 have surface densities betweeen 50 and 125 g/m2 and
preferably have a surface density of 70 g/m2.
The polyethene layer 12 is not moisture-penetrable and the
strips 5 are therefore moisture-sealed. If the material of
the strips 5 is exposed on one side to moisture, only the
paper layer 10 or 11 on that side will get wet and the
other paper layer will stay dry.
If a honeycomb panel is built up of a honeycomb core of
the moisture-sealed paper described, against which on one
or both panel sides a cover plate is glued, then at least
one of the cover plates can have the same structure as
that of the strips 5 according to figure 5. The polyethene
layer 12 can then have the same surface density as that of
the strips 5, whereas the paper layers 10 and 11 of the
cover plates can have a surface density such that the
total surface density of each cover plate is between 150
and 750 g/m2.
In a honeycomb panel according to figure 1 in which the
strips 5 of the core 2 as well as both the cover plates 3
and 4 are provided with a moisture-sealed polyethene layer
12 built into the paper as described above, the cells 8 of
the hexagonal grid are separated by moisture-sealed poly-
ethene layers 12 from each other and from the outside.

CA 02216841 1997-09-29
W 096/30202 PCT~L96100124
Thus moisture cannot penetrate through the panel surfaces
or through the cell walls 9 at one of the circumferential
edges of the panel, and can only moisten a paper layer on
an outer side o~ the panel. I~ the panel is damaged local-
ly, and the moisture-sealed polyethene layer 12 is broken
there, moisture can penetrate into the respective cell or
cells 8 and moisten the paper layers exposed therein.
However, the other moisture-sealed polyethene layers 12 of
those cells 8 prevent the moisture from spreading ~urther
in the panel 1, thus limiting the moisture damage to the
damaged cells 8.
A water-resistant glue is used ~or glueing, which impreg-
~ ~ nates the paper. The relatively slow migration of moisture
through the paper, parallel to a glueing bond and the
moisture-sealed layers, or in between two strips, or
across a strip edge through the paper o~ a cover plate, to
an adjacent, undamaged cell, is ef~ectively blocked by the
local paper impregnations.
Honeycomb panels 1 according to the invention can, for
instance, be used in pallets, which are almost completely
made up of paper, with decks and foot blocks formed from
honeycomb panels according to the invention. Such pallets
can stand in a puddle of water without any problem, since
they are not sensitive to weakening by the penetration of
moisture therein.
Honeycomb panels according to the invention can, in addi-
tion, be used as ~illing material in car doors, ~or insu-
lating and ~or cushioning the impact in sideward collisi-
ons. For that purpose suitable packs of such honeycomb
panels 1 are formed, which are arranged vertically in the
car door. Because o~ ~luctuations in the relative air
humidity and the temperature, water can condense in the
inside of the door, as a result of which the panel pack
will get wet through direct condensation thereon or indi-

CA 02216841 1997-09-29
W 096~0202 PCT~NL96/00124
rectly. Moreover, on account of ageing of the rubber seals
o~ the door window, rain water can leak into the inside of
the door, so that the panel pack, initially the edges
thereof, will get wet. The polyethene layers 12 in the
strips 5 of the honeycomb core 2 and also those in the
cover plates 3 and 4 provide an effective seal against
this moisture.
By building in the moisture-sealing polyethene layer 12 in
the paper, the material retains the character of paper.
The material can be processed using the usual methods and
materials in the production process for honeycomb cores
and honeycomb panels (and further for pallets and car door
fillings), among others by the usual cutting and glueing
actions. In addition, the material has the thermal stabi-
lity and the mechanical strength of paper, that is to say,
for example, that at 150~ C it retains its shape and
strength which is not the case with a material built up
entirely of polyethene, polypropene or another cheap
plastic.
The material o~ the honeycomb core and the honeycomb panel
according to the invention can easily be recovered for re-
use by shredding it and stirring it into water in a so-
called pulper. The water then penetrates the paper andbecause of the stirring the paper is mechanically separa-
ted from the polyethene, so that a paper slurry, the pulp,
is formed. The polyethene can then be scooped out of the
paper slurry after which the latter can be reused for
producing paper products. This method ~or recovery does
not work in the case of impregnated paper, in view of the
fact that the water cannot penetrate it. Water-resistant
glue residues and small paper fractions impregnated with
water-resistant glue can, however, also be easily scooped
up out of the paper slurry.

Dessin représentatif
Une figure unique qui représente un dessin illustrant l'invention.
États administratifs

2024-08-01 : Dans le cadre de la transition vers les Brevets de nouvelle génération (BNG), la base de données sur les brevets canadiens (BDBC) contient désormais un Historique d'événement plus détaillé, qui reproduit le Journal des événements de notre nouvelle solution interne.

Veuillez noter que les événements débutant par « Inactive : » se réfèrent à des événements qui ne sont plus utilisés dans notre nouvelle solution interne.

Pour une meilleure compréhension de l'état de la demande ou brevet qui figure sur cette page, la rubrique Mise en garde , et les descriptions de Brevet , Historique d'événement , Taxes périodiques et Historique des paiements devraient être consultées.

Historique d'événement

Description Date
Demande non rétablie avant l'échéance 2002-03-22
Le délai pour l'annulation est expiré 2002-03-22
Réputée abandonnée - omission de répondre à un avis sur les taxes pour le maintien en état 2001-03-22
Modification reçue - modification volontaire 1998-03-10
Inactive : CIB attribuée 1997-12-31
Inactive : CIB attribuée 1997-12-18
Symbole de classement modifié 1997-12-18
Inactive : CIB en 1re position 1997-12-18
Inactive : Transfert individuel 1997-12-09
Inactive : Lettre de courtoisie - Preuve 1997-12-05
Inactive : Notice - Entrée phase nat. - Pas de RE 1997-12-05
Demande reçue - PCT 1997-12-03
Demande publiée (accessible au public) 1996-10-03

Historique d'abandonnement

Date d'abandonnement Raison Date de rétablissement
2001-03-22

Taxes périodiques

Le dernier paiement a été reçu le 2000-02-29

Avis : Si le paiement en totalité n'a pas été reçu au plus tard à la date indiquée, une taxe supplémentaire peut être imposée, soit une des taxes suivantes :

  • taxe de rétablissement ;
  • taxe pour paiement en souffrance ; ou
  • taxe additionnelle pour le renversement d'une péremption réputée.

Les taxes sur les brevets sont ajustées au 1er janvier de chaque année. Les montants ci-dessus sont les montants actuels s'ils sont reçus au plus tard le 31 décembre de l'année en cours.
Veuillez vous référer à la page web des taxes sur les brevets de l'OPIC pour voir tous les montants actuels des taxes.

Historique des taxes

Type de taxes Anniversaire Échéance Date payée
Taxe nationale de base - petite 1997-09-29
Enregistrement d'un document 1997-09-29
TM (demande, 2e anniv.) - petite 02 1998-03-23 1998-03-05
TM (demande, 3e anniv.) - petite 03 1999-03-22 1999-03-01
TM (demande, 4e anniv.) - petite 04 2000-03-22 2000-02-29
Titulaires au dossier

Les titulaires actuels et antérieures au dossier sont affichés en ordre alphabétique.

Titulaires actuels au dossier
BESIN B.V.
Titulaires antérieures au dossier
JOHANNES PHILIPPUS LUDOVICUS MARIA DIDERICH
Les propriétaires antérieurs qui ne figurent pas dans la liste des « Propriétaires au dossier » apparaîtront dans d'autres documents au dossier.
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Description du
Document 
Date
(aaaa-mm-jj) 
Nombre de pages   Taille de l'image (Ko) 
Abrégé 1997-09-28 1 54
Description 1997-09-28 9 411
Revendications 1997-09-28 3 80
Dessins 1997-09-28 1 22
Dessin représentatif 1997-12-29 1 3
Rappel de taxe de maintien due 1997-12-07 1 111
Avis d'entree dans la phase nationale 1997-12-04 1 193
Courtoisie - Certificat d'enregistrement (document(s) connexe(s)) 1998-04-23 1 117
Courtoisie - Lettre d'abandon (taxe de maintien en état) 2001-04-18 1 182
PCT 1997-09-28 15 422
Correspondance 1997-12-08 1 29
PCT 1998-03-09 5 130