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Sommaire du brevet 2492399 

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(12) Brevet: (11) CA 2492399
(54) Titre français: PAROI DE FILTRATION POUR COFFRAGES ETIRABLES, MOYENS ET PROCESSUS DE FABRICATION DE CETTE PAROI, ET COFFRAGES AINSI EQUIPES
(54) Titre anglais: FILTERING WALL FOR EXPENDABLE FORMS, MEANS AND PROCESS FOR MAKING SAID FILTERING WALL AND FORMS EQUIPPED WITH SAME
Statut: Réputé périmé
Données bibliographiques
Abrégés

Abrégé français

L'invention concerne une paroi de filtration conçue pour un coffrage extensible comprenant un treillis formé par l'assemblage de fils de chaîne et de trame flexibles, ledit treillis étant tendu sur une structure indéformable. La paroi de filtration est caractérisée en ce que certains des fils de chaîne sont plus résistants que d'autres fils de chaîne, le treillis étant étiré par la traction exercée uniquement sur les fils de chaîne les plus résistants, et en ce qu'il comprend des moyens pour maintenir la tension en associant les fils les plus résistants à la structure indéformable, lesdits moyens de maintien de tension délimitant une maille plus grande que celle résultant de l'entrelacement initial des fils de chaîne et de trame.


Abrégé anglais

The invention concerns a filtering wall designed for an expendable formwork comprising a lattice formed by assembling flexible warp and weft yarns, the lattice being stretched on an undeformable structure. The filtering wall is characterized in that some of the warp yarns are more resistant than other warp yarns, the lattice being stretched by traction solely exerted on the more resistant warp yarns and in that it comprises tension maintaining means for maintaining the tension associating the more resistant yarns with the undeformable structure, the tension maintaining means delimiting a larger mesh than the one resulting from the initial interlacing of the warp and weft yarns.

Revendications

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




CLAIMS

1. A filtering wall for an expendable form comprised of a mesh formed by
assembling
warp strands, and weft strands, said mesh being stretched on a shape-retaining

structure;
said filtering wall being characterized in such a way that
- said warp strands is subdivided into more resistant warp strands and regular

warp strands, said mesh's tension is created by traction solely on the more
resistant warp strands, and
- including tension-maintaining means associating said more resistant warp
strands with said shape-retaining structure, said tension-maintaining means
delimiting a larger panel than the one resulting from an initial crossing of
said
warp and weft strands.


2. A filtering wall for an expendable form according to claim 1, characterized
in such
a way that said tension-maintaining means include:
- on one side of said mesh, pressure bars extending along one of said
mesh's axes,
- on the other side of said mesh, support bars extending perpendicularly to
the direction of said pressure bars, and
- at the panel corners, linking means connecting said bars together thereby
forming at these connection points a grip blocking said mesh.


3. A filtering wall for an expendable form according to claim 2, characterized
in such
a way that said pressure bar is triangular in shape and an outside face of the

pressure bar base being grooved.


4. A filtering wall for an expendable form according to claim 3, characterized
in such
a way that said pressure bar has an axial cavity so as to make it flexible.


5. A filtering wall for an expendable form according to claim 2, characterized
in such
a way that said linking means is shaped like a two-leg clamp with a stop on
one side
for said pressure bar and, on the outside, on each of said legs' outside
faces, a
support surface for said support bars.


11



6. A filtering wall for an expendable form according to claim 5, characterized
in such
a way so that a bolt is preventing said support bars from sliding laterally.


7. A filtering wall for an expendable form according to claim 5, characterized
in such
a way that said bolt is formed by a bump next to one of said support surfaces.


8. A filtering wall for an expendable form according to claim 5, characterized
in such
a way that ends of said legs are equipped with lateral notches to attach to a
"Tor"
iron bar on a form-bearing structure.


9. Apparatus for producing a filtering wall for an expendable form according
to any
one of claims 1 to 8 characterized in such a way that the apparatus includes:
- said mesh wound around an axle serving as a supply source,
- a pre-tensioning assembly between said supply source and an irreversible
step-by-step advancing system,
- an assembly to position said shape-retaining structure,
- a post-tensioning assembly, and

- a station to cut said filtering wall to a suitable length after said
filtering wall
assembly stations.


10. Apparatus for producing a filtering wall according to claim 9,
characterized in
such a way that the apparatus includes:
- a roller and a backing roller, each equipped with grooves so that said
linking means can pass freely,
- a set of two fixed rollers between which a mobile roller is located between
two positions, one upper position that starts unwinding a mandrel said mesh is

wound on and the other lower position stopping said mandrel's unwinding.


11. Apparatus for producing a filtering wall according to claim 10,
characterized in
such a way that an outside face of said roller and backing roller is made from
a
material that can be deformed elastically so as to engage said mesh.


12



12. Apparatus for producing a filtering wall according to claim 10,
characterized in
such a way that a traction force on said mesh is provided either by the simple
weight
of said mobile roller, or by springs or other traction means.


13. Apparatus for producing a filtering wall according to claim 9,
characterized in
such a way that:
- the apparatus includes wheels spreading along an axis transverse to said
mesh's direction of movement,
- there are as many wheels as linking means to position transversally,

- each said wheel whose circumference is a multiple of the panels' step,
includes evenly spaced notches that can accommodate a head of each linking
means, and
- said wheels being driven by an irreversible type of stepper rotation
movement.


14. Apparatus for producing a filtering wall according to claim 13,
characterized in
such a way that laterally to said wheels and in the area of said notches, said
system
having guides for said pressure bars that are introduced in the linking means'
heads.

15. Apparatus for producing a filtering wall according to claim 9,
characterized in
such a way that the apparatus includes an alignment system for all of said
linking
means located on an axis.


16. Apparatus for producing a filtering wall according to claim 15,
characterized in
such a way that said alignment system includes an axle on which pairs of
spread
disks are mounted, each pair of said spread disks being designed to laterally
wedge
a linking means and that part of said axle located between two of said spread
disks
of one pair so as to fit partially between said linking means legs.


17. Apparatus for producing a filtering wall according to claim 9,
characterized in
such a way that the apparatus includes a mechanical means causing said support

bars to tip towards said linking means.


18. Apparatus for producing a filtering wall according to claim 17,
characterized in
such a way that the apparatus includes a grip having two jaws closing in
together.


13



19. Method for producing a filtering wall according to any one of claims 1 to
8,
comprising the steps of:
stretching said mesh between two tension zones by exerting traction along said
warp
strands,
positioning said clamp-shaped linking means at certain points of said mesh to
delimit
said panels,
aligning said linking means,
inserting, by sliding, a pressure bar in said linking means' heads,
positioning said pressure bars supported on said linking means support
surfaces,
and
tipping said support bars towards said linking means' median axis to form
grips with
said linking means and said pressure bar.


20. Method for producing a filtering wall according to claim 1, comprising the
steps
of:
building said filtering wall continuously and progressively and then cutting
said wall to
the desired dimensions.


14

Description

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



CA 02492399 2007-05-09

FILTERING WALL FOR EXPENDABLE FORMS, MEANS AND PROCESS FOR
MAKING SAID FILTERING WALL AND FORMS EQUIPPED WITH SAME
FIELD OF THE INVENTION
The invention concerns a filtering wall for expendable forms.
It also concerns forms equipped with the filtering wall as well as the
fabrication process.
It also concerns the means of fabricating the flltering wall.

BACKGROUND OF THE INVENTION
Two types of forms are used to construct concrete work.
The first type is comprised of reusable forms that form a rigid watertight
pocket that
concrete is poured into.
Steel sheets attached to a bearing structure form the liner walls.
This type of form presents several disadvantages, including:
- forms that are quite heavy in order to resist the hydrostatic forces,
- the custom of using fast-set concretes whose resistance stresses exceed
requirements, etc.
In order to resolve these different problems, the second type of form
appeared, namely
expendable forms with filtering walls.
The concept of these filtering walls was developed to create different
products (FR-A-
2.675.181 et FR-A-2.647.839).
In particular, these filtering walls can be used to reduce the weight of
forms.
The "Porm/filling" composite presents improved mechanical properties compared
to a
shell made by traditional means.
The first forms primarily used metal installed to create the desired
permeability in the
liner skin.
To create the liner skin on a form wall, several metal plates have to be
installed to
obtain the desired surface.
In addition, in these types of form, since part of the metal structure is not
covered by a
regulatory coating, it presents long-term durability risks.
Consequently, the structural calculations cannot take the metal structure into
account.
In addition, the installed metal skin, even when protected against corrosion,
can lead to
damage due to corrosion phenomena.

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CA 02492399 2007-05-09

In order to compensate for these disadvantages, there is an expendable form
with a
filtering skin (FR-A-2.800.109) that, in place of the installed metal, uses a
mesh or fabric
with wide panels obtained by interlacing warp and weft strands.
The size of the mesh panels is determined by the aggregates and desired
filtering.
According to this solution, since the mesh is flexible when it is attached to
the form's
reinforcement, it is stretched in the two perpendicular directions to obtain
uniform
tension in the warp and weft strands in both directions.
In addition, spacers keep the liner skin away from the reinforcement.
The disadvantage of this type of form is that it over-consumes mesh and
positions the
mesh such that it hinders filling the form.
In effect, part of the mesh penetrates into the volume to be filled, which
poses a
problem.

SUMMARY OF THE INVENTION
The invention aims to resolve the aforementioned disadvantages.
To this end, the invention concerns a filtering wall for an expendable form
comprised of
a mesh formed by assembling flexible warp and weft yarns, said mesh being
stretched
on a so-called shape-retaining structure and the filtering wall being
characterized in
such a way that:
- some of the warp strands are more resistant than the other warp strands, the
mesh
being tensioned by traction exerted solely on said more resistant warp
strands, and
- it includes tension-maintaining means that associate the more resistant
strands with
the shape-retaining structure, said tension-maintaining means delimiting a
larger panel
than the one resulting from the initial interlacing of the warp and weft
strands.
The invenfion also concerns a form equipped with a liner wall and the means of
fabricating the said liner wall.

There has thus been outlined, rather broadly, the more important features of
the
invention in order that the detailed description thereof that follows may be
better
understood, and in order that the present contribution to the art may be
better
appreciated. There are additional features of the invention that will be
described
hereinafter and which will form the subject matter of the claims appended
hereto.
In this respect, before explaining at least one embodiment of the invention in
detail, it
is to be understood that the invention is not limited in its applicaiion to
the details of
2


CA 02492399 2007-05-09

construction and to the arrangements of the components set forth in the
following
description or illustrated in the drawings. The invention is capable of other
embodiments and of being practiced and carried out in various ways. Also, it
is to be
understood that the phraseology and terminology employed herein are for the
purpose of description and should not be regarded as limiting.
As such, those skilled in the art will appreciate that the conception, upon
which this
disclosure is based, may readily be utilized as a basis for the designing of
other
structures, methods and systems for carrying out the several purposes of the
present
invention. It is important, therefore, that the claims be regarded as
including such
equivalent constructions insofar as they do not depart from the spirit and
scope of the
present invention.

These together with other objects of the invention, along with the various
features of
novelty which characterize the invention, are pointed out with particularity
in the
claims annexed to and forming a part of this disclosure. For a better
understanding of
the invention, its operating advantages and the specific objects attained by
its uses,
reference should be had to the accompanying drawings and descriptive matter in
which there is illustrated preferred embodiments of the invention.

BRIEF DESCRIPTION OF THE INVENTION
The invention can be understood based on the description provided hereafter as
a non-
limiting example and the drawing attached hereto that schematically shows:
- figure 1: an installation to implement the process,
figure 2: an installation detail,
figure 3: a filtering wall,

- figure 4: a representation of the mesh deformation,
- figure 5: a connection means or clamp,

- figure 6: a section of a pressure bar,
- figure 7: a section of a support bar,

- figure 8: a pressure bar installation station,

- figure 9: a close up view of a detail in figure 8,
- figure 10: a front view of the roller,

- figure 11: a side view of the roller,

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CA 02492399 2007-05-09
- figure 12: a perspective view of the backing roller,
- figure 13: a means of pre-tensioning,

- figure 14: a detail of the support bars' installation,
- figure 15: a section view of the completed assembly.
DETAILED DESCRIPTION OF THE INVENTION
By referring to the drawing, one sees a lining and filtering wall hereinafter
referred to as
filtering wall (1) for clarity, and intended to equip an expendable form.
The filtering wall (1) acts as a filter and depending on the size of panels
(102), allows
excess humidity to escape.

Typically, the filtering wall(1) includes a mesh (2) formed by assembling
flexible warp
strands comprised of more resistant warp strands (2A), regular warp strands
(2B), and
weft strands (2C), with the mesh (2) being tensioned on a shape-retaining
structure
(90). It is understood that the term shape-retaining is not to be taken
literally, but rather
in the sense that the deformation related to the tension is extremely low.

This filtering wall (1) is then attached to a bearing structure Onot shown) in
order to
establish an expandable form and from which other filtering walls (1) can be
linked to.
According to a characteristic of the filtering wall (1) :
- more resistant warp strands (2A) are more resistant than the regular warp
strands
(2B), the mesh (2) being tensioned by traction exerted solely on the more
resistant
warp strands (2A), and
- it includes tension maintaining means (3, 4, 5) for maintaining the tension
that
associates the more resistant strands (2A) with the shape-retaining structure
and
created by the cooperation of linking means (3) acting as a clamp of sort;
pressure
bars (4); and support bars (5) which, together with the mesh (2), delimit a
larger
panel (102) than the one resulting from the initial interlacing of regular
warp strands
(2B), and weft strands (2C).

The tension and thus the deformation are determined between two consecutive
tension-
maintaining means (3, 4, 5). More precisely, the principle does not involve
exerting
tension between the ends of the mesh (2) then implementing the tension
maintaining
means (3, 4, 5), but on the contrary, fixing one end of the mesh (2) with the
tension
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CA 02492399 2007-05-09

maintaining means (3, 4, 5), then exerting a tension force to fix the
subsequent tension
maintaining means (3, 4, 5).

By pressing on these new fixed points, one exerts a new tension, thereby
locking the
mesh (2) with the tension maintaining means (3, 4, 5) and so on.

By proceeding this way, one obtains the same tension in each panel (102),
thereby
defining the size of the panels (102).

Since the tension exerts on the more resistant warp strands (2A), the single
warp strand
(2B) and the weft strands (2C) located in the previously defined panel (102)
will arrange
themselves based on an iso-stressed distribution as shown in figure 4.

The panel (102) is defined by four points Al, A2, B1 and B2 before it is
tensioned.
When one only pulls points B1 and B2 towards B'l and B'2, the weft strands
(2C)
deform (finer lines), bending with a neutral strand in the middle of the panel
(102). This
layout spreads the constraints decreasingly from the edge of the panel (102),
which
allows, under pressure, increasing deformations towards the center of the
panel (102).
Under pressure from concrete, the liner side defined by a panel (102) is no
longer flat
but bulged out. This lets one optimize the quantity of filler then used to
obtain a finished
surface.

The value of the deformation is determined by the relationship between the
elasticity of
the more resistant warp strands (2A) compared to the regular warp strands
(2B). So that
each panel (102) is independent, the more resistant warp strands (2A) shall
not be
common to two side-by-side panels (102) and, consequently, the mesh (2) shall
include
pairs of resistant strands (2A).
The distance between the more resistant warp strands (2A) in a pair will
depend on the
tension maintaining means (3, 4, 5).
These more resistant warp strands (2A) are either larger strands, made from
another
material or more generally comprised of a group of close-set strands.
The tension-maintaining means (3, 4, 5) include:
- on one side of the mesh (2), pressure bars (4) that extend along one of the
mesh's
(2) axes,



CA 02492399 2007-05-09

- on the other side of the mesh (2), support bars (5) that extend
perpendicularly to the
direction of the pressure bars (4), and
- at the panel (102) corners, are the linking means (3) for connecting the
pressure
bars (4) and support bars (5) together thereby forming at these connection
points a
grip that blocks the mesh (2).
These pressure bars (4) and support bars (5) and connection means (3)
constitute the
shape-retaining structure (90). The mesh (2) is not installed on a pre-formed
shape-
retaining structure (90), but rather this shape-retaining structure (90) is
formed at the
same time as the filtering wall (1).

In order to improve the locking of the mesh (2) at the four corners of the
panel (102), the
pressure bar (4) can include grooves (4A).
The pressure bar (4) is triangular shaped and the outside face of the base is
grooved
(4A).
The pressure bar (4) has an axial cavity (4B) to make it flexible.
The support bars (5) are in pairs (i.e.; a linking means (3) holds one
pressure bar (4)and
two support bars (5).

Now we will describe in detail the linking means (3). Moreover it is specified
that in order
to prevent any risk of disorder caused by the elements coming unfastened
during
transportation, this system may be completed by a positive locking system,
bonding or
welding. The connection means (3) appears as a clamp intended to overlap the
pressure bar (4) and includes two legs (3A) with a stop face (3B) for the
pressure bar
(4) and, on the outside, on each of the arms' (3A) outside faces, a support
surface (3C)
for the support bars (5). The pressure bar (4) slides between the legs (3A). A
bolt (3D)
prevents the support bars (5) from sliding laterally. The bolt (3D), formed by
a bump, is
next to one of the support surfaces (3C). The support bar (5) is loaded by
rotating
around its base.

Therefore, to this end, one will note that this support bar (5) has rounded
faces and is
flexible so it can deform elastically. Viewed as a section, it is shaped like
a figure eight.
Potential cavities provide the desired compressibility. This is also an
advantage
because these pressure bars (4) and support bars (5) can be delivered wound on
a reel.
During fabrication, one will use the linking means (3) and support surface
(3C) as a
tooth to advance the filtering wall (1). It should be noted that the legs (3A)
ends are
6


CA 02492399 2007-05-09

equipped with lateral notches (3E) to attach to a "Tor" iron bar on the form-
bearing
structure.

To fabricate the filtering wall (1), one uses a set of means.
These means include:
- a mesh (2) wound around a shaft serving as a supply source (20),
- ahead of this supply source (20), a tensioning assembly (30), and

- a positioning assembly (40) to install the shape-retaining structure (90).
A cutting station (50) set at the appropriate length is provided ahead of the
filtering wall
(1) assembly stations.
The shape-retaining structure (90) is installed progressively by positioning
the
connecting means (3) on the tensioned mesh (2) and then installing the
pressure bar (4)
followed by the support bars (5).
The tensioning assembly (30) are divided into two tensioning zones (30A and
30B) that
are spread on both sides of a tool (41). One is placed just behind the mesh
(2) wound
on its supply source (20) and the other, even with the equipped and thus
completed
mesh (2).

The tensioning assembly (30) exerts a traction force on the mesh (2), which is
locked in
a straight line by one of the tool's (41) systems . The traction force is
determined by the
number of panels (102) between the two tensioning zones (30A, 30B) in
proportion to
the desired lengthening of one panel (102).
The straight-line locking of the mesh (2) located in the pre-tensioning zone
(30B)
includes a roller (31) and a backing roller (32), each equipped with grooves
(33) so the
linking means (3) can pass freely.

The roller (31) and backing roller (32) pinch the mesh (2). A drive system
(e.g.; by
constant torque) is used to apply a constant pre-determined force on the warp
strands
(2A, 2 B).
The roller (31) and backing roller (32) are motorized and can advance the mesh
(2)
progressively.
The roller (31) and/or backing roller (32) can be comprised of cable rollers
(70) aligned
on a shaft. The cable roller (70) is mounted in addition on arms (100).

The outside face of the cable rollers (70) and/or roller (31) and backing
roller (32) will
be in material that can be deformed elastically so that it engages the mesh
(2)
7


CA 02492399 2007-05-09

sufficiently. The diameter will be defined to engage a sufficient length of
the mesh's (2)
surface. In the pre-tensioning zone (30A), in a preferred form of advancing
and
tensioning the mesh (2), the tensioning assembly (30) is comprised of a set of
two fixed
rollers (34, 35) between which a mobile roller (36) is located between two
positions
(dotted lines), one upper position that starts unwinding a mandrel (91) the
mesh (2) is
wound on and the other lower position that stops the mandrel's (91) unwinding.
The
mesh (2) then forms a"V". The pre-traction force on the mesh (2) is provided
either by
the simple weight of the mobile roller (36) or this weight is completed by
springs or other
traction means like jacks, etc. The tension is then determined by the means
spread out
ahead of the tool (41).

After the pre-tensioning zone (30A), which in particular controls the
unwinding of the
mesh (2) from the supply source (20) it is wound on, there is a mesh (2)
advance
system and a linking means (3) installation system. This installation system
consists of
wheels (42) spread along an axis transverse to the mesh's (2) direction of
movement.
There are as many wheels (42) as linking means (3) to be positioned
transversally.
All of the wheels (42) are united in rotation and driven by a suitable
irreversible system
(e.g.; a stepper motor) that authorizes one rotation corresponding to a step
of the mesh
(2).

Each wheel (42), whose circumference is a multiple of the panels' (102) step,
includes
evenly spaced notches (43) that can accommodate the head of each linking means
(3).
Laterally to these wheels (42) and in the area of the notches (43), the system
includes
guides (44) for the pressure bars (4) that must be introduced in the linking
means (3)
heads. Therefore these guides (44) present a groove (45) whose shape is
complementary to the outside of the pressure bars (4). In fact, the guides
(44) are also
used to assemble the wheels (42) together.

To introduce the pressure bars (4), the linking means (3) have to be pre-
aligned
because the mesh (2) and the shape of the notches (43) do not hold them
adequately.
To this end, the machine includes an alignment system (46) to align all of the
linking
means (3) located on an axis.

This alignment system (46) includes an axle (47) on which are mounted pairs of
spread
disks (48), each pair of disks (48) being designed to laterally wedge a
linking means (3)
and that part of the axle (47) located between a pair of disks (48) so as to
fit partially
8


CA 02492399 2007-05-09

between the legs (3A). One sees that these disks (48) have beveled sides (49)
to
facilitate centering the linking means (3). Teeth (60) driven by the wheels
(42) are used
to position, advance and immobilize the mesh (2) on the disks (48). The
linking means
(3) are installed by the bottom in the installation shown. This way one
obtains a position
along the two axes the time it takes to introduce the pressure bar (4) that
comes from a
section wound on a drum.

The pressure bar (4) is fed as follows.
Cable rollers (70) drive the section from a reel (69) up to the first stop
(71).
When the alignment system (46) is in position, the first stop (71) is
retracted and the
cable rollers (70) push the pressure bar (4) through the linking means (3),
guided by the
guides (44), up to the second stop (72).
The pressure bar (4) is then cut and the first stop(71) is then put back in
position.
As the pressure bars (4) are positioned, the support bars (5) have to be
installed.
To do this, the support bars (5), wound on a reel (120), are progressively
unwound flat
and then pivoted 90 to until they are anchored in a freestanding position on
the linking
means (3).
The machine will then include a system to progressively unwind the support
bars (5)
and a means to position them.
Initially, the support bars (5) are guided so that they press against the
linking mean's (3)
support surfaces. The two support bars (5) then form a"V".
A mechanical means, which, in a preferred embodiment is in the form of a grip
(80)
causes the support bars (5) to tip towards the linking means (3). The grip
(80) has two
jaws (81) closing in together.

By elastically deforming the pressure bar (4) and support bars (5), one then
positions
the support bars (5) in a freestanding position and grips the mesh (2). One
sees that the
action/reaction forces exerted on the support bars (5) are inclined vis-a-vis
the linking
means (3) median axis. As such, based on continuous elements mesh (3), support
bars
(5) and pressure bar (4)), one can create a filtering wall (1) of suitable
length that is only
cut at the end of the assembly operation.
According to the fabrication process for a filtering wall (1):
- one stretches a mesh (2) between two tension zones (30A, 30B) by exerting
traction
along more resistant warp strands (2A) and regular warp strands (2B),
- one positions the linking means (3) at certain points of the mesh (2) to
delimit the
panels (102),

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CA 02492399 2007-05-09
- one aligns the linking means (3),
- one inserts, by sliding, the pressure bar (4) through the stop face (3B),

- one positions the support bars (5) supported on the support surfaces (3C),
- one tips the support bars (5) towards the linking means (3) median axis to
form the
grips with the linking means (3) and pressure bar (4), and
- one constitutes the filtering wall (1) continuously and progressively and
then one
cuts the filtering wall (1) to the desired dimensions.
The filtering wall (1) is then joined to a bearing structure to create an
expendable form.
As to a further discussion of the manner of usage and operation of the present
invention, the same should be apparent from the above description.
Accordingly, no
further discussion relating to the manner of usage and operation will be
provided.
With respect to the above description then, it is to be realized that the
optimum
dimensional relationships for the parts of the invention, to include
variations in size,
materials, shape, form, function and manner of operation, assembly and use,
are
deemed readily apparent and obvious to one skilled in the art, and all
equivalent
relationships to those illustrated in the drawings and described in the
specification are
intended to be encompassed by the present invention.

Therefore, the foregoing is considered as illustrative only of the principles
of the
invention. Further, since numerous modifications and changes will readily
occur to
those skilled in the art, it is not desired to limit the invention to the
exact construction
and operation shown and described, and accordingly, all suitable modifications
and
equivalents may be resorted to, falling within the scope of the invention.


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

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 , États administratifs , Taxes périodiques et Historique des paiements devraient être consultées.

États administratifs

Titre Date
Date de délivrance prévu 2008-02-12
(22) Dépôt 2005-01-04
Requête d'examen 2005-01-04
(41) Mise à la disponibilité du public 2006-07-04
(45) Délivré 2008-02-12
Périmé 2015-01-05

Historique d'abandonnement

Il n'y a pas d'historique d'abandonnement

Historique des paiements

Type de taxes Anniversaire Échéance Montant payé Date payée
Requête d'examen 400,00 $ 2005-01-04
Le dépôt d'une demande de brevet 200,00 $ 2005-01-04
Taxe de maintien en état - Demande - nouvelle loi 2 2007-01-04 50,00 $ 2006-11-28
Taxe finale 150,00 $ 2007-11-06
Taxe de maintien en état - Demande - nouvelle loi 3 2008-01-04 50,00 $ 2007-11-28
Taxe de maintien en état - brevet - nouvelle loi 4 2009-01-05 50,00 $ 2008-11-27
Taxe de maintien en état - brevet - nouvelle loi 5 2010-01-04 100,00 $ 2009-11-27
Taxe de maintien en état - brevet - nouvelle loi 6 2011-01-04 100,00 $ 2010-10-18
Taxe de maintien en état - brevet - nouvelle loi 7 2012-01-04 100,00 $ 2011-12-13
Taxe de maintien en état - brevet - nouvelle loi 8 2013-01-04 100,00 $ 2012-12-11
Titulaires au dossier

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

Titulaires actuels au dossier
DAURON, FRANCOISE
Titulaires antérieures au dossier
S.O.
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
(yyyy-mm-dd) 
Nombre de pages   Taille de l'image (Ko) 
Abrégé 2005-01-04 1 17
Revendications 2005-01-04 4 135
Description 2005-01-04 10 463
Dessins 2005-01-04 6 114
Description 2005-12-15 10 456
Revendications 2005-12-15 4 140
Dessins représentatifs 2006-06-28 1 9
Page couverture 2006-06-28 1 39
Revendications 2006-08-14 4 129
Description 2007-05-09 10 398
Revendications 2007-05-09 4 120
Dessins représentatifs 2007-05-31 1 24
Page couverture 2008-01-28 1 55
Poursuite-Amendment 2005-06-15 3 92
Poursuite-Amendment 2006-02-20 3 124
Cession 2005-01-04 2 79
Correspondance 2005-02-10 1 16
Poursuite-Amendment 2005-12-15 18 676
Poursuite-Amendment 2006-08-14 8 192
Poursuite-Amendment 2006-11-10 3 95
Taxes 2006-11-28 1 25
Poursuite-Amendment 2007-05-09 19 615
Correspondance 2007-11-06 1 25
Taxes 2007-11-28 1 24
Taxes 2008-11-27 1 31
Correspondance 2010-04-06 1 22
Taxes 2009-11-27 1 28
Correspondance 2010-05-12 1 12
Taxes 2010-10-18 1 26
Taxes 2011-12-13 1 26
Taxes 2012-12-11 1 25