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Sommaire du brevet 2087178 

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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) Brevet: (11) CA 2087178
(54) Titre français: MELANGEUR AVEC CHICANE VIRTUELLE POUR SUBSTANCES PARTICULAIRES
(54) Titre anglais: BLENDER WITH VIRTUAL BAFFLE OF PARTICULATE MATERIAL
Statut: Durée expirée - au-delà du délai suivant l'octroi
Données bibliographiques
(51) Classification internationale des brevets (CIB):
(72) Inventeurs :
  • AVERY, HUGH E., JR. (Etats-Unis d'Amérique)
(73) Titulaires :
  • J & D BEHEER B.V.
(71) Demandeurs :
  • J & D BEHEER B.V.
(74) Agent: SMART & BIGGAR LP
(74) Co-agent:
(45) Délivré: 2004-06-08
(86) Date de dépôt PCT: 1992-04-09
(87) Mise à la disponibilité du public: 1992-10-29
Requête d'examen: 1999-04-08
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/US1992/002890
(87) Numéro de publication internationale PCT: WO 1992018229
(85) Entrée nationale: 1993-01-12

(30) Données de priorité de la demande:
Numéro de la demande Pays / territoire Date
683,320 (Etats-Unis d'Amérique) 1991-04-10
822,082 (Etats-Unis d'Amérique) 1992-01-17
858,704 (Etats-Unis d'Amérique) 1992-03-27

Abrégés

Abrégé anglais


A blending apparatus, inexpensive in construction and
requiring a minimum of recirculation, is today essential for economical and
thorough blending of particulate material, for example, plastic pellets
of virgin material and of pellets that have been reconstituted from
recycled material. Construction of the blender is low in cost not only
because the customary receiver, and its piping, conventionally installed
below he blender are eliminated, but because the rigid baffle of the
prior blender has been replaced by a virtual baffle (626) of particulate
material, which forms a toroidal block within: he sonically walls
(610) of the blender; the converging blended conduits (602) adjacent
thereto; and the structural supporting matrix. The baffle of particulate
material (626) serves: 1) as a termination surface for the conventional
perforated blending conduits; and 2) retains a toroidal annular
volume of particulate material in position between the upper outer
surface of the baffle and the inside wall of the blender.

Revendications

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


12
CLAIMS
1. A gravity blender having a cylindrical upper
portion operable to receive and store a mass of
particulate material, and a lower portion defining a
downwardly converging conical section sealed to the
lower cylindrical edge of the upper portion, the lower
and upper portions being centered in a single vertical
axis, a plurality of blending conduits extending
downwards from the upper portion, the blending conduits
continuing downwardly adjacent said converging conical
section and the blending conduits converging downwardly
towards said vertical axis of said blender apparatus,
wherein the blending conduits have lower open ends which
terminate in a generally circular and horizontal
pattern, said convergence of the blending conduits and
said conical walls of the lower section creating and
supporting in operation a virtual baffle of particulate
material in combination, said virtual baffle consisting
of voussoir-like accumulations of particulate material
in said converging channels between the blending
conduits and between the conical walls and the blending
conduits, the baffle of particulate material remaining
In position until the blending tubes have begun to
release the final portions of the particulate material
through the blending tubes to blend with the particulate
material of the virtual baffle as both pass into and
through the lower portion of the bin.
2. Gravity blender apparatus according to claim 1,
further comprising an upwardly converging conical
surface, having a maximal diameter substantially that of
the diameter of the circular pattern of the lower open
end of said conduits, the conical surface projecting
upwards towards the circle of open conduit lower ends,
said lower ends being spaced above a bottom of said
conical surface, and in that the virtual baffle is
formed solely by the particulate material supported upon
a matrix of said converging blending conduits, said
conical lower portion of the bin walls and said conical
surface projecting upwards.

13
3. Gravity blender apparatus according to claim 1,
further comprising within said lower portion a vertical
tubular element centered axially therein, the virtual
baffle being formed solely of said particulate material
supported upon a matrix of said converging blending
conduits, said conical lower portion of the bin and said
tubular element.

Description

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


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1
BLENDER WITH VIRTUAL BAFFLE OF PARTICULATE MATERIAL
BACICCROUND OF THE 1NYENTION
FIELD OF THE INlIENTION
This invention relates to blenders and more specifically
to methods and apparatus for thoroughly blending particulate
or granular materials, a portion of the unblended material
forming a toroidal block, constituting a virtual baffle to
the downward flow of any particulate material except that
passing through the blending tubes themselves.
DEFINITIONS
baffle--(noun) a plate, wall, screen, or other device to
deflect, check, or regulate Ilow.
virtual battle-°herein defined as a barrier, formed of
particulate material, in combination with a supporting
structural matrix, to the downward flow of particulate
material, except through blending tubes which penetrate the
barrier.
matrix--herein defined as blender walls, metallic plates and
cones, blending conduits, all coacting wixh the particulate
material to provide the virtual battle.
voussoir°-(diet.) one of the wedge-shaped pieties forming an
arch or vault. Used herein to graphically describe the cross
section of the virtual baffle, at some point on the toroid
or segment.
bridging--the tendency of particulate solids, flowing
downward through a channel with converging sides, to bridge
across the channel, blocking the channel, causing all of the
material flowing out of the blender to flaw through the
blending tubes.
toroidal block--herein, a toroidal mass of particulate
material, having a voussoir-like crossection, supported
betwe~:n the outer wall of the blender and the downwsrdly '
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20'7178
converging metal baffles of FIGs. 6 and 9. Also called a
toroidal or annular "keystone joist.°'
DESCRIPT10N OF THE PRIOR ART
Prior to the advent of large scale use of polymers in
such applications as continuous film or filament production,
the needs of industry for precision blendinig of bwlk solids
products were met with mechanical tumbler, ribbon or screw
blenders. Capacities of these units ranged from less than
one cubic meter to over 100 cubic meters.
As the demand for plastics grew, it became apparent that
much larger blender volumes were necessary to allow
continuous production lines in plastics users' plants to
operate without frequent shutdowns caused either by (1)
variations in physical properties or (2) additive content
inherent in the producer's production processes. This Ied
to a demand for tumble blenders in the range of 700 cubic
meter capacity.
The high cost of large tumble blander installations
prompted industry-wide efforts to develop a blending
capability in storage silos to comply with the product
uniformity requirements of the polymer industry. A number
of designs resulted, some silo blenders having capacities in
the 3000 cubic meter range.
Efficient silo blenders are available today in two broad
categories:
A. Gravity Blenders
These designs generally use either external or internal
tubes having openings to allow solids in the bin to slow
from the main silo body to a separate blend chamber below
the silo. The tube openings in the main body of the silo
are randomly located so that material drained into the blend
chamber represents a typical composite of the material in
the main silo body.
B. Internally Recirculated Blenders
These units rely on an external source of air to pick up
material in the lower part of the silo body by an orifice
arrangement, and convey it to the upper part of the main
silo. The material flowing vertically down through the silo
is randomly sampled by the openings in the tubes and
agitated by inverted cones, resulting in homogenization of
the silo contents after a period of time.
SUSSTdTUTE SHEET

CA 02087178 2002-11-25
3
The performance of both Gravity Blenders and Internally
Recirculated Blenders can be significantly improved by
recirculation while the blender is being filled.
As storage bins or hoppers are filled with granular or
particulate material, it often happens that an inhomogeneous
distribution of material occurs. There may be several
reasons for this result. In the first place, as material
flows into a hopper, the material beneath the inlet nozzle
piles up at the angle of repose of the materiel. In this
case the larger particles often roll dawn the peak toward
the sides of the hopper, leaving the finer particles in the
central region. Inhomogeneity can also occur when the
hopper is filled with different batches of the same material
because of variations of composition ai individual batches.
When material is drawn off through an outlet at the bottom
of the hopper, the material flows irorn the region directly
above the nozzle. Thus the material will not be
representative of the average characteristics of the
material in the hopper.
Prior art attempts at a solution to this segregation
problem typically included placing perforated blending tubes
vertically within the hopper. Such tubes have openings
spaced apart along their axes which allow material from all
levels within the hopper to enter the tubes. The lower
portion of the blending tubes communicate with the outlet
nozzle so that a more nearly homogeneous mixture of the
material issues iron the outlet of the hopper.
In spite of many efforts to completely blend the
particulate materiel, it is usually necessary in prior art
blenders to specially treat at least the final portion of
the discharge to achieve acceptable results. For example,
U.S. Patent No. 4,923,304, discloses that the first and last
few pounds are not used, but instead are withdrawn and later
remixed with fresh ingredients, and re-poured, with these
fresh ingredients, back into the dispensing apparatus.

CA 02087178 2002-11-25
3a
SUMMRRY OF THE INDENTION
Recording to the invention there is provided a
gravity blender having a cylindrical upper portion
operable to receive and store a mass of particulate
material, and a lower portion defining a downwardly
converging canical section sealed to the lower cylindrical
edge of the upper portion, the lower and upper portions
being centered on a single vertical axis. R plurality of
blending conduits extended downwards from the upper
portion and continue downwardly adjacent the converging
conical section, converging downwardly towards the
vertical axis of the blender apparatus, The blending
conduits have open lower ends which terminate in a
generally circular and horizontal pattern, the convergence
of the blending conduits and the conical walls of the
lower section creating and supporting in operation a
virtual baffle of particulate material in combination.
The virtual baffle consists of uousaoir-like accumulations
of particulate material in the converging channels between
the blending conduits and between the conical walls and
the blending conduits. The baffle of particulate material
remains in position until the blending tubes have begun to
release the final portions of the particulate material
through the blending tubes to blend with the particulate
material of the virtual baffle as bath pass into and
through the lower portion of the bin,
In combination with a conventional hopper and
conventional blending tubes, two embodiments disclosed
herein can effectively blend a batch of particulate
material, including the final portion of the batch. In a
third embodiment, the operation of the i'ull size blender
is simulated, in an adjustable

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laboratory size model, enabling experimentation with various
particulate densities, cosrpactabilities and annular gaps.
My invention does not r~u~ire _a separate blending
chamber. It utilizes the tendency of particulate solids,
flowing downward through a channel with converging sides, to
bridge across the channel, blocking the channel, causing all
of the material flowing out of the blender to flow through
the blending tubes. Thus my invention assures that all of
the material discharged from the blender represents a truly
typical composite of the blender contents.
The three preferred embodiments disclosed in this
specification rely upon the tendency of particulate solids,
in flowing downward through a channel with converging sides,
to bridge across the channel. Such bridging may occur in:
A. A toroidal block, having a voussoir-like
crosssection, as shown in the blender of FIG. 6, and
equivalent supporting structure for bridging by particulate
materials, as shown in FIGrs. 2, 4, ?, 8 and 10.
B. A similar toroidal block in the apparatus iw FIG. 9,
for confirming by empirical tests, the preliminary design
proportions for a blender specifically contoured for the
density, compactability, and other characteristics ~i the
particulate material, or materials, to be blended;
C. A voussoir-like construction for the support of
particulate material! as shown in the construction of FIGS.
7 and 11-13, in which the matrix of blending tubes, optional
inverted cones, and conical walls of the vessel prsvide a
matrix for the support of the virtual baffle of pe~rticulate
material.
The "bridging principle" and the "virtual baff~de"
concept employed in the preferred embodiments are
illustrated in the following drawings and explained in the
specification.
BRIEF DESCRIPTION OF THE DRAb'VINGS
FIG. 1 provides an elevational, sectional vi~v through
the center line of a typical blender of the prior art;
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FIG. 2 provides an elevational, sectional view through
the center line of one preferred embodiment of the gravity
blender of the present invention;
FIG. 3 provides a schematic diagram of the hopper,
piping and pumps, if required for extremely uniform blending
within the gravity blender of the present invention;
FIG. 4 provides a sectional view from the vertical
centerline through the exterior wall of the lower portion of
the hopper of an alternate embodiment of tine present
invention, including a detail of s blending tube snd a
conduit for exhaust gases, or for structural purposes;
FIG. 5 is a section of the conduit of FIG. 4,
illustrating the knifelike device for preventing
accumulation of particulate matter on the top surface of the
conduit;
FIG. 6 is a more detailed view of Embodiment A of the
present invention, as combined with terminations of the
conventional blending tubes;
FIG, 7 is a more detailed view oI alternate Embodiments
A and C of the present invention as combined with two convex
surfaces for better blending of virtually all of the
material to be blended;
FiG. 8 provides an elevational, sectional view through
the center line of a gravity blender of an alternate
embodiment A of the present invention, in which one basic
convex surface is combined with a cylindrical device,
developed further in FIG. I2-I3, for further blending;
FIG. 9, Embodiment B, provides a vertical, sectional
view through the center line of the test apparatus, which
substantially duplicates the conditions within, and
operations of blending of the present invention)
FIG. 10, Embodiment A, provides a sectional view from
the vertical centerline tl2rough the exterior wall of the
lower portion of the hopper of an alternate embodiment of
the present invention, including a detail of a blending
tube, but without a venting conduit for exhaust gases
FIB, 11, Embodiment C, provides a fragmented elevational
hemicylindricai inside view, through a section in the plane
including the vertical centerline of a blender, utilizing a
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virtual baffle of particulate material, supported partially
on a matrix of converging blending tubes, and equipped with
a small inverted cone. Two partial sectional details are
provided]
FIG. 11A is a fragmentary section just inside~the wall
1112, showing the ends 1114 of the blending tubes 1110
within the toroidal block 1130 of particu late materials
FIG. 11B shows various angles of cut off of the
discharge ends 1114 of the blending tubes 11101
FIG. 12, Embodiment C, provides an elevational
hemicylindrical inside view, through a section in the plane
including the vertical centerline of a blender, utilizing a
virtual baffle of particulate material, supported solely on
a matrix of converging blending tubes, without an inverted
Bone, but with a vertical tubular elementl Q nd
FIG. 13, Embodiment C, provides a generally horizontal
sectional view through the blender of FIG. 12, at
approximately the level of the virtual baffle of particulate
material, supported partially on a matrix of converging
blending tubes and the vertical tubular element 1240.
DESCRIPTION OF THE THREE PREFERRED EIgBODI115ENTS OF THE
INVENTION
In praviding a more detailed discussion of the three
preferred embodiment of the invention, reference will be
first made to components of the blending apparatus from the
prior art, insofar as they differ from, or combine with, the
new invention for improved and more efficient performance at
lower cost.
In FIG. 1 is shown a drawing fram Patent No. 3,268,215,
issued to T.A. Burton for a Blending Apparatus on August 23,
1966. Illustrative of this prior art are tank or hopper 10,
blending tubes 24, and separate receiver or collector r
manifold 2ff.
FIG. 2 shows the similarities and the differences
between the prior art of FIG. 1 and the present invention.
Similarities include a cylindrical housing 210 superimposed
upon and sealed to a conical structure 211. Downcomer tubes
224 however, terminate in perforations 227 through the
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inverted generally horizontal baffle 225, comprising part of
the present invention. This means of termination is a
significant improvement over the prior art shown in FIG. 1,
in which tubes 24 pass entirely through the hopper 10 and
terminate in receiver 28. In the annular area 226, between
the converging walls of baffle 225 and structure 2.11, the
accumulation of particulate matter forms a toroldal block to
the passage of the particulate matter accumulating above the
block.
The recirculating schemes of the prior art are shown in
FIG. 3, diagrams 302 and 303.
My invention, as shown in its alternate embodiments.
deals with the problem in novel fashion. In FIG. 2,,and as
more easily seen in FIG. 6, the blending tubes, of which
tube 602 is an example, terminate in apertures 603. These
apertures are formed in the convex surface 604. This means
of termination is a significant departure from the prior
art, as shown in FIG. 1, in which tubes 24 pass entirely
through the hopper 10 and terminate in receiver 28.
Returning to FIG. 6, it should be noted that convex
surface 604 is supported upon brackets 606, and is thus
spaced away from the exterior cone 610 by an annular gap
shown as 605. Now, if the surfaces 604, annular gaps 605,
and apertures 603, are designed as will be shown in
connection with the description of FIG. 9, the material to
be blended will begin to sill the hopper 601, but will form
a barrier at the annulus 605, past which barrier the
particulate material will not descend, until blending tubes
are evacuated.
As the blending operation being perfarmed on the batch,
or mixture, draws to a close, the level of the material will
fall below the seam line 60't, and then past a series of
apertures 608. The discharge of material from the M ender
will then Ilow preferentially from the blending tulaes 602,
with essentially zero flow through the annulus 605 between
the inverted cone and the vessel cone. Flow through this
annulus 605 cannot occur until the supply of maternal coming
from the blend tubes 602 is exhausted,
FIG. 9 is a diagram of the Test Apparatus, il'~ustrating
its similarity in construction to the blenders of the
present invention. Material 901 is cross hatched for
clarity. Material 902 is shown crosshatched at mother
~~ ~~~'~~ri «~ .~,°~~~'r

CA 02087178 2002-11-25
.
angle. The inverted cone may be set in a position 911 and
provides a smaller annular gap 903 than were it raised to a
higher position, say 912.
Material 901 is first poured into the inverted cone,
upright cone and standpipe at the start of test, filling
volumes shown as underlined 1,2,3,4 and 5. Material 902 may
be then put in to sill the remainder of the vessel and will
fill to the annular surface 809, in "keystone fashion," as a
toroidal block, or as a vousaofr a! particulate material.
Material 902 will not flow out of the vessel until the
supply of Material 901 is exhausted. In order to make this
principle work:
e. The flow of material from the center nozzle must be
regulated b~ ual~e to a rate below that could cause
voids to Corm in material 801.
b. Flow properties of material 801 and 902 should be
similar.
The teat procedure, it properly performed, can provide
valuable information on the dimensions 903, 809, and other
critical factors in cull-size blender design.
FIG. 11 illustrates the use of an inverted battle
through which the blending tubes 1110 do not penetrate, but
which is positioned in such a manner that a voussoir of
particulate material is formed between converging surfaces
in close proximity to each other. In this blender,
particulate material is entrapped within the matrix of
conduits 1110 and small inverted cone 1113 mounted on
brackets 1106 within the cone of the outer wall 1112, The
density, particle shape, compactability, and a host of
indeterminate factors will cooperate to establish a toroidal
block of material 1130, thus creating a virtual baffle of
particulate material, supported partially on a matrix of
converging blending tubes 1110, a small inverted cone 1113,
and lower section wall 1112. It must be understood that
this drawing is purely illustrative of the inventive
concept, and that other variations are within the scope of
the following claims.

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FIG. 12 illustrates the accumulation of particulate
material 1230 in this blender, when entrapped within the
matrix of conduits 1210, and within the cone of the outer
wall 1212. This embodiment is not equipped with an inverted
cone 1113, but has instead a vertical tubular element 1240.
A voussoir of particulate material 1230 will be formed,
Creating a virtual baille, in the corm of a toroid~al block,
between and among Lhe structural members, including the
central tubular structure 1240. The diameter of the tube
1240 is drawn too large in comparison with the area 1233
provided Ior discharge of the particulate material, but the
concept is adequately presented.
The density, particle shape, eompactability, and a host
of indeterminate factors will cooperate to establish the
position, volume, and mass of material 1230. These
parameters will be those required to obtain a suitable
toroidal block, utilizing a virtual baffle of particulate
material, supported partially on a matrix of converging
blending tubes 1210 and vertical tubular element 1240. It
must be understood that this drawing is purely illustrative
of the inventive concept, and that other variations are
within the scope the following claims.
FIG. 13 provides a horizontal sectional view through the
blender of FIG. 12, at approximately the level of the
virtual baffle 1230 of particulate material, supported
partially on a matrix of converging blending tubes 1210.
Further support is provided by the vertical tubular
structure 1240.
CLARIFICATION OF DIFFERENCES BETWEEN BAFFLES OF
THE THREE PREFERRED EItiBODII4iENTS OF THIS INVENTION
In the embodiments disclosed in FIGS. 11-13, the blender
uses a number of blending tubes or channels which terminate
at the same elevation adjacent to a small inverted cone 1113
as shown in FIG. 11, or without an inverted cone as shown in
FIVs, 1l and 13.
Although as shown in FIG. 6, the converging blending
conduits provide only limited support to the blocking
accumulation of the particulate material, in FIG. 11 the
ma,~or past of the mass of particulate material is supported
by the converging matrix of conduits. In FIGs. 12 and 13,
the entire mass of particulate material is supported by the
converging matrix of blending conduits and the vertical
tubular element 1240,
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Thus a very useful blender can be constructed which can
be installed in silos at a much lower cost than blenders
that rely solely on separate blend chambers as shown in F1G.
1.
FIG. 11 illustrates an alternate embodiment and a more
economical method of construction than that of FIG. 7,
achieved by eliminating the large baffle 704, and the "hard"
terminations of the blending tubes in apertures in the sides
of cone 704.
The matrix of converging downcoming blending tubes 1110
are mounted close to the conical wall 1112. Blending tubes
1110 do not terminate in apertures or hubs in the surface of
cone 1113, but terminate in the approximate region
delineated as 1114, which has a variable vertical range as
shown by the two-headed arrow at 1123.
The base line of the lower end of cone 1113 may vary
above or below a typical position 1114, as shown by
bidirectional arrow 1123. If proper proportions are
selected' such a grid of blending tubes converging toward
plane 1114, in combination with the converging wall 1112 of
the lower bin section 1101, can support a voussoir 1130 of
particulate material, extending slightly downward or upward
cram reference plane 1114.
It is thus possible to achieve the blocking effect of
the impervious baffle 604 of FIG. 6 without the expense of
physically connecting (measuring, cutting and welding) the
blending tubes to apertures fn the surface of a large
baffle, and in some cases the small baffle 1113 may not be
needed. Please refer to FIG. 12.
In FIG. 11A, various terminations for the blending tubes
may be employed. The intent of this disclosure is to
illustrate the concept of a baffle primarily of particulate
material, simpler to build and less costly in material. The
specific terminations of blending.conduits, patterns of the
matrix, and use or nonuse of small convex cones are all .
minor variations contemplated in the general use of this
invention.
In FIG. 12 is shown an embodiment which does not use the
small inverted baffle or cone 1113, a preferred construction
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being the structural tubing 1240. With some particulate
materials, the conical wall 1112 in combination with the
blending tube matrix 1110, may support the toroidal blocking
mass of material 1120 without member 1240.
The section shown in FIG. 13 is typical of many usable
designs. The intent of this disclosure is to illustrate the
concept of a baffle primarily of particulate material, .
simpler to build and less costly in material. The specific
terminations of blending conduits, patterns of the matrix,
and use or nonuse of small convex cones are all minor
variations contemplated in the general use of this
invention.
S~SST~TUTE SHEET
,

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
Inactive : CIB expirée 2022-01-01
Inactive : Périmé (brevet - nouvelle loi) 2012-04-09
Lettre envoyée 2008-03-14
Inactive : Transfert individuel 2008-01-07
Inactive : TME en retard traitée 2007-04-26
Lettre envoyée 2007-04-10
Inactive : Lettre officielle 2007-02-05
Inactive : Paiement correctif - art.78.6 Loi 2007-01-24
Accordé par délivrance 2004-06-08
Inactive : Page couverture publiée 2004-06-07
Préoctroi 2004-02-17
Inactive : Taxe finale reçue 2004-02-17
Un avis d'acceptation est envoyé 2003-10-30
Lettre envoyée 2003-10-30
Un avis d'acceptation est envoyé 2003-10-30
Inactive : Approuvée aux fins d'acceptation (AFA) 2003-10-17
Modification reçue - modification volontaire 2003-08-05
Inactive : Dem. de l'examinateur par.30(2) Règles 2003-02-05
Lettre envoyée 2003-01-24
Inactive : Transfert individuel 2002-11-25
Modification reçue - modification volontaire 2002-11-25
Inactive : Dem. de l'examinateur par.30(2) Règles 2002-05-23
Inactive : Grandeur de l'entité changée 2002-04-19
Inactive : Renseign. sur l'état - Complets dès date d'ent. journ. 1999-04-20
Inactive : Acc. réc. RE - Pas de dem. doc. d'antériorité 1999-04-20
Inactive : Dem. traitée sur TS dès date d'ent. journal 1999-04-20
Exigences pour une requête d'examen - jugée conforme 1999-04-08
Toutes les exigences pour l'examen - jugée conforme 1999-04-08
Réputée abandonnée - omission de répondre à un avis sur les taxes pour le maintien en état 1997-04-09
Inactive : Demande ad hoc documentée 1997-04-09
Demande publiée (accessible au public) 1992-10-29

Historique d'abandonnement

Date d'abandonnement Raison Date de rétablissement
1997-04-09

Taxes périodiques

Le dernier paiement a été reçu le 2004-03-09

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.

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
TM (demande, 6e anniv.) - petite 06 1998-04-09 1998-02-27
TM (demande, 7e anniv.) - petite 07 1999-04-09 1999-04-08
Requête d'examen - petite 1999-04-08
TM (demande, 8e anniv.) - petite 08 2000-04-10 2000-04-06
TM (demande, 9e anniv.) - petite 09 2001-04-09 2001-03-30
TM (demande, 10e anniv.) - générale 10 2002-04-09 2002-04-08
Enregistrement d'un document 2002-11-25
TM (demande, 11e anniv.) - générale 11 2003-04-09 2003-04-07
Taxe finale - générale 2004-02-17
TM (demande, 12e anniv.) - générale 12 2004-04-09 2004-03-09
TM (brevet, 13e anniv.) - générale 2005-04-11 2005-03-15
TM (brevet, 14e anniv.) - générale 2006-04-10 2006-04-10
2007-01-24
TM (brevet, 15e anniv.) - générale 2007-04-10 2007-04-26
Annulation de la péremption réputée 2007-04-10 2007-04-26
Enregistrement d'un document 2008-01-07
TM (brevet, 16e anniv.) - générale 2008-04-09 2008-03-20
TM (brevet, 17e anniv.) - générale 2009-04-09 2009-03-26
TM (brevet, 18e anniv.) - générale 2010-04-09 2010-03-31
TM (brevet, 19e anniv.) - générale 2011-04-11 2011-03-24
Titulaires au dossier

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

Titulaires actuels au dossier
J & D BEHEER B.V.
Titulaires antérieures au dossier
HUGH E., JR. AVERY
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) 
Dessin représentatif 1998-06-18 1 14
Description 2002-11-25 12 472
Revendications 2002-11-25 2 56
Dessins 2002-11-25 9 220
Dessin représentatif 2003-10-17 1 9
Dessins 1994-02-26 9 203
Description 1994-02-26 11 431
Abrégé 1995-08-08 1 97
Revendications 1999-05-05 7 298
Revendications 1994-02-26 5 185
Page couverture 1994-02-26 1 16
Page couverture 2004-05-31 1 47
Rappel - requête d'examen 1998-12-10 1 116
Accusé de réception de la requête d'examen 1999-04-20 1 173
Courtoisie - Certificat d'enregistrement (document(s) connexe(s)) 2003-01-24 1 107
Avis du commissaire - Demande jugée acceptable 2003-10-30 1 159
Avis concernant la taxe de maintien 2007-05-14 1 172
Quittance d'un paiement en retard 2007-05-14 1 165
Courtoisie - Certificat d'enregistrement (document(s) connexe(s)) 2008-03-14 1 105
PCT 1993-01-12 21 671
Taxes 2003-04-07 1 35
Taxes 2002-04-08 1 33
Taxes 2000-04-06 1 49
Taxes 2001-03-30 1 32
Taxes 1999-04-08 1 49
Taxes 1998-02-27 1 54
Taxes 1993-02-17 1 33
Correspondance 2004-02-17 1 35
Taxes 2004-03-09 1 35
Taxes 2005-03-15 1 28
Taxes 2006-04-10 1 39
Correspondance 2007-02-05 1 14
Taxes 2007-04-26 1 41
Taxes 2009-03-26 2 67
Taxes 2010-03-31 2 61
Taxes 1997-04-07 1 85
Taxes 1994-04-07 1 48
Taxes 1996-04-09 1 52
Taxes 1995-04-07 1 50
Correspondance 1994-05-30 1 14
Correspondance 1994-05-19 3 84