Field of the invention
[0001] The present invention refers to the field of capsules for preparing edible products,
in particular aromatic beverages such as for example espresso type coffee and similar.
[0002] The present invention further refers to a process for preparing edible products using
capsules of the type of the present invention.
Background of the invention
[0003] The prior art includes different solutions of capsules of the type of the invention,
adapted for preparing edible products.
[0004] Said capsules typically present an envelope that provides an oxygen barrier and confines
an individual portion of edible substance, such as for example roasted ground coffee
beans. Moreover, said capsules typically present a wall adapted for entry of an upstream
pressurized flow, and a downstream wall adapted for exit of a resulting beverage
The document
CH 605293 discloses a capsule of the type of the present invention presenting a container part
configured in frusto-conic shape that provides an opening and a rim region that develops
in the perimeter of said opening, and a lid part that can be united with a rim region
of the container part.
[0005] One of the problems that have been addressed in this type of capsules is that of
sealing of said rim region when submitted to the pressurized flow inside of a respective
brewing device.
[0007] The document
EP 2012994 B1 discloses a solution whereby the sealing means are injection moulded over the external
surface of the container part of capsule.
[0008] The documents
EP 1849715 B1,
EP 2029457 B1 disclose solutions for providing a better connection of the sealing element to the
container part of capsule.
[0009] The document
EP 2289820 B1 refers the possibility of the sealing means being provided as an integral piece or
a piece separate from the container part of capsule, and further, in the previous
case, as a piece mounted in releasable manner or as a piece attached to the rim region,
for example by means of a welding technique or of an adhesive. This document neither
discloses nor advances any suggestion on how to provide a simple retention of sealing
means on the capsule.
[0010] There is therefore the need for a solution of retention of sealing means in the container
part of capsule, of simple construction and adapted so that can be actuated in effective
and reliable manner when necessary.
General description of the invention
[0011] The objective of the present invention is that of providing a capsule that provides
a more effective sealing disposition of the rim region and with smaller use of materials
and energy, in particular by means of a simpler retention of the sealing means on
the container part of capsule.
[0012] The objective above is solved according to the present invention by means of a capsule
according to claim 1.
[0013] In particular, the present invention discloses a capsule for preparing edible products
when provided inside of a respective product preparation device, whereby the container
part of said capsule presents sealing means and retention means of said sealing means
adapted so that said sealing means can be retained loose in the vicinity of the rim
region and can be impinged by one of the capsule confining parts of said product preparation
device being thereby pushed relative to the side wall of container part and pressed
upon the rim region thereof when the capsule is inside of a respective product preparation
device and the latter is at a product preparation position.
[0014] In particular, said capsule is adapted for preparing beverages such as for example
aromatic beverages including espresso type coffee and similar, by means of a pressurized
flow that flows through a portion of edible substance collected inside of said capsule.
[0015] The container part of said capsule is provided in a material that provides oxygen
barrier, such as known in prior art, including in aluminium or aluminium alloy, and
in plastic or in a plastic composite.
[0016] The capsule disclosed by the present invention is particularly adapted for containing
an individual portion of aromatic edible substance, such as for example roasted ground
coffee, tea, or similar, and presents capsule walls disposed in direct opposition
and adapted for injection of a pressurized fluid flow upstream, and discharge of resulting
aromatic beverage downstream.
[0017] Preferred embodiments are described in the dependent claims.
[0018] A related objective of the present invention is to provide a process of preparation
of edible products, in particular based upon a capsule according to the present invention.
[0019] The objective above is solved according to the present invention by means of a process
according to claim 15.
Description of the figures
[0020] The present invention shall hereinafter be explained in greater detail based upon
preferred embodiments and the attached Figures.
[0021] The Figures show, in simplified schematic representations:
- Figure 1:
- side cut-view of a capsule (1) of the type of the present invention, according to
prior art;
- Figure 2:
- side cut-view of a capsule (1) of the type of the present invention, according to
prior art, inside of a product preparation device (10);
- Figure 3:
- side cut-view of a capsule (1) according to the present invention in a non-operative
position;
- Figure 4:
- side cut-view of a capsule (1) according to the present invention in an operative
position;
- Figure 5:
- plane and side cut-view of a first embodiment of a sealing element (4) in a capsule
(1) according to the present invention;
- Figure 6:
- plane and side cut-view of a second embodiment of a sealing element (4) in a capsule
(1) according to the present invention;
- Figure 7:
- inferior top view of a first embodiment of a container part (2) in a capsule (1) according
to the present invention;
- Figure 8:
- inferior top view of a second embodiment of a container part (2) in a capsule (1)
according to the present invention;
- Figure 9:
- side cut-view of a first embodiment of a container part (2) in a capsule (1) according
to the invention;
- Figure 10:
- side cut-view of a second embodiment of a container part (2) in a capsule (1) according
to the invention.
Description of preferred embodiments of the invention
[0022] It is known in the prior art to configure capsules (1) for preparing edible products
such as aromatic beverages, inside of product preparation devices (10), such as espresso
coffee brewing devices.
[0023] A capsule (1) of the type of the present invention (see
Figure 1) comprises a container part (2), configured for example in generally frusto-conic
shape, presenting a base wall (21) upstream, and a sidewall (22) that defines an opening
(23) downstream, and further presenting a rim region (24) that extends sideways along
the perimeter of said opening (23). The capsule (1) further comprises a li part (3)
configured as membrane or folio-like element, and adapted so that can be united with
the downstream-oriented surface of said rim region (24).
[0024] It is further known in the prior art to provide a sealing element (4) configured
in annular shape and provided in the upstream-oriented face of said rim region (24)
so that can be compressed by an upstream confining part (11) of said product preparation
device (10) when in a position of readiness to operate (see
Figure 2).
[0025] Said sealing element (4) is typically provided united to the upstream-oriented surface
of said rim region (24). Said sealing element (4) can be provided in the same material
as said container part (2), or in a different material.
[0026] According to a first inventive aspect, the capsule (1) according to the present invention
presents a sealing element (4) of annular shape provided as a loose piece, so that
can be displaced along the sidewall (22) and in the proximity of the upstream-oriented
surface of said rim region (24), see
Figures 3 and
4.
[0027] According to a second inventive aspect, the capsule (1) presents a container part
(2) provided so that retains said sealing element (4) in the vicinity of the upstream-oriented
of said rim region (24), whereby said sealing element (4) is adapted so that can be
pressed, by an upstream confining part (11) of said product preparation device (10),
against said upstream-oriented surface of said rim region (24) when said capsule (1)
is inside of a product preparation device (10) in a position of readiness for preparing
the product.
[0028] It is therefore proposed an inventive sequence in the preparation of an edible product
based upon said capsule (1) according to the present invention and comprising the
steps of providing a product preparation device (10) in an open position where an
upstream confining part (11) is apart from a downstream confining part (12), providing
a capsule (1) to the interior of said product preparation device (10), in particular
a capsule (1) according to any one of claims 1 to 14, whereby said capsule (1) presents
a rim region (24) and a sealing element (4), and actuating said product preparation
device (10) in a closing movement until reaching a closed position where said upstream
and downstream confining parts (11, 12) confine said capsule (1), whereby during said
closing movement of product preparation device (10), said upstream confining part
(11) displaces said sealing element (4) of said capsule (1) to a position next to
the upstream-oriented surface of the rim region (24), so that said sealing element
(4) provides a sealing function of pressurized liquid flow between the interior and
exterior of said product preparation device (10) .
[0029] It is preferred (see
Figures 5 and
6) when said sealing element (4) presents a first surface (41) downstream-oriented
and adapted so that can be pressed against the upstream-oriented surface of said rim
region da (24), and a second surface (42) upstream-oriented, whereby said first and
second surfaces (41, 42) are different, preferentially develop along non-coplanar
planes.
[0030] In this sense, it is further preferred (see
Figure 5) when said second surface (42) presents a surface characteristic (43) adapted for
providing a sealing connection with a part (11) of said product preparation device
(10). This surface characteristic (43) can be embodied as a surface that is non co-planar
with the downstream-oriented surface of said sealing element (4), as represented in
Figure 5. This surface characteristic (43) can further be embodied as a non-plane
surface along a region that is adjacent to the interior perimeter of said sealing
element (4).
[0031] It is preferred when said sealing element (4) is provided in a material that provides
a stable and substantially rigid form. In particular, it is preferred when said sealing
element (4) is provided in a plastic material, and preferentially in a material that
is different or of different composition from the material of said container part
(2).
[0032] It is further preferred (see
Figure 6) when said sealing element (4) presents two perimeter regions of different wall thickness,
including an interior perimeter region (44) that develops along the interior perimeter
of said sealing element (4), whereby said exterior perimeter region is preferentially
provided substantially rigid and said interior perimeter region (44) is preferentially
provided flexible. This disposition advantageously provides an easier first introduction
of the sealing element (4) beyond the retention means provided on the sidewall (22)
of the container part (2).
[0033] Figures 7 to
10 represent embodiments of a capsule (1) according to the present invention whereby
there is provided a plurality of salience zones (25) in the sidewall (22) of the container
part (2), whereby said salience zones (25) are adapted so as to retain the sealing
element (4) in the extension of sidewall (22) downstream thereof up until said rim
region (24) of the container part (2).
[0034] In particular,
Figures 7 and
8 reproduce the inferior plane view (that is, from the upstream-oriented base wall
(21)) of an embodiment of capsule (1) according to the present invention whereby there
are provided five salience zones (25) in the sidewall (22) of container part (2).
As represented, said salience zones (24) correspond to a localized increase of the
dimension of exterior perimeter of said sidewall (22), and are uniformly distributed
along the perimeter extension.
[0035] It is preferred when said salience zones (24) are provided as an integral part of
said sidewall (22) of container part (2). In particular, it is preferred when said
salience zones (25) are configured as at least one of a localized variation of shape
of said sidewall (22) and a localized variation of wall thickness of said sidewall
(22) .
[0036] Alternatively, said salience zones can be provided as a piece that is different from
said container part (2).
[0037] As shall be promptly understood by an expert in the field, said salience zones (25)
are adapted so that provide passage of said sealing element (4) in a downstream oriented
movement. In this sense, said salience zones (25) are preferentially configured in
a downstream-oriented wedge shape, so that provide an increase of perimeter of said
sidewall (22) in the downstream direction thereof (vide
Figures 9 and
10).
[0038] In particular, it is preferred when said salience zones (25) present a projection
of height smaller than 2 mm, preferentially smaller than 1 mm, relative to the surface
plane of said sidewall (22).
[0039] Moreover, it is further preferred when said salience zones (25) are provided so that
provide retention of said sealing element (4) along a height extension (hi) of said
sidewall (22) that is smaller than 30%, preferentially smaller than 10%, of the total
height (h) of said container part (2) of capsule (1).
1. Capsule (1) for preparing an edible product, adapted so that can be confined in a product preparation
device (10) by respective confining parts (11, 12) so that can be crossed by a pressurized
liquid flow inside thereof, whereby said capsule (1) comprises:
- a container part (2) configured for example in a generally frusto-conic shape, presenting
a base wall (21) arranged upstream and a sidewall (22) that defines an opening (23)
arranged downstream, and further presenting a rim region (24) that develops sideways
along the perimeter of said opening (23),
- a lid part (3) configured as a membrane or folio-like element, and adapted so that
can be united with said rim region (22), and
- a sealing element (4),
said capsule (1) being
characterized
in that said sealing element (4) is provided as a loose piece of annular shape, so that can
be displaced along an extension of the exterior side of said sidewall (22) in the
proximity of the upstream-oriented surface of said rim region (24), and
in that said container part (2) is provided so that retains said sealing element (4) within
said extension of sidewall (22) in the vicinity of the upstream-oriented surface of
said rim region (24),
whereby said sealing element (4) is adapted so that can be pressed against said upstream-oriented
surface of rim region (24) when said capsule (1) is inside of said product preparation
device (10) at a position of readiness to prepare said edible product.
2. Capsule (1) according to claim 1, characterized in that said sealing element (4) presents a first sealing surface (41) oriented downstream
and adapted so that can be pressed directly against the upstream-oriented surface
of said rim region (24), and a second sealing surface (42) oriented upstream, whereby
said first and second surfaces (41, 42) are different.
3. Capsule (1) according to claim 2, characterized in that said second sealing surface (42) presents a surface characteristic (43) adapted to
provide a sealing connection with one of said confining parts (11, 12) of said product
preparation device (10).
4. Capsule (1) according to claims 1 to 3, characterized in that said sealing element (4) presents two perimeter regions of different wall thickness,
including an interior perimeter region (44) that develops along the interior perimeter
extension of said sealing element (4), whereby said interior perimeter region (44)
is preferentially provided flexible.
5. Capsule (1) according to claims 1 to 4, characterized in that the exterior side of said sidewall (22) presents retention means adapted so that
limit the movement of said sealing element (4) along said sidewall (22) to only a
region neighbouring of said rim region (24), whereby said neighbouring region preferentially
does not extend beyond an extension that corresponds to 1/3, more preferentially to
1/4, of the total extension of said sidewall (22).
6. Capsule (1) according to claims 1 to 5, characterized in that the exterior side of said sidewall (22) presents a plurality of salience zones (25)
disposed along a radial direction and at a distance from said rim region (24), whereby
said salience zones (25) are adapted so that prevent said sealing element (4) from
passing in a upstream-oriented movement beyond said salience zones (25) .
7. Capsule (1) according to claims 1 to 4, characterized in that the exterior side of said sidewall (22) presents at least two, preferentially at
least three salience zones (25) on said sidewall (22), whereby said salience zones
(25) are preferentially distributed in regular manner along the exterior perimeter
of said sidewall (22).
8. Capsule (1) according to claims 6 and 7, characterized in that said salience zones (25) are configured in a downstream oriented wedge shape, or
similar, so that provide an increase of perimeter of said side wall (22) in the downstream
direction, and adapted so that provide passage of said sealing element (4) under pressure
in a downstream-oriented movement but prevent said sealing element (4) from passing
beyond.
9. Capsule (1) according to claims 6 to 8, characterized in that said salience zones (25) present a height projection smaller than 2 mm, preferentially
smaller than 1 mm, relative to the surface plane of said sidewall (22).
10. Capsule (1) according to any one of claims 6 to 9,
characterized in that said salience zones (25) are provided as at least one of:
- a single piece together with said container part (2), and
- a piece that is different from said container part (2) .
11. Capsule (1) according to claims 6 to 10,
characterized in that said salience zones (25) are configured as at least one of:
- a localized variation of shape of said sidewall (22), e
- a localized variation of thickness of said sidewall (22) .
12. Capsule (1) according to any one of claims 1 to 11, characterized in that said sealing element (4) presents a surface characteristic (43) provided as a surface
non co-planar with the upstream oriented of said sealing element (4).
13. Capsule (1) according to any one of claims 1 to 12, characterized in that said sealing element (4) presents a surface characteristic (43) provided as a non-plane
surface along a region adjacent to the interior perimeter of said sealing element
(4).
14. Capsule (1) according to any one of claims 1 to 13, characterized in that said sealing element (4) is provided in a material that provides a stable and substantially
rigid, and in that said sealing element (4) is provided in a plastic material, and preferentially in
a different material, or of different composition, than said container part (2).
15. Process for preparing an edible product, such as a espresso coffee, whereby said process
comprises the steps:
- providing a product preparation device (10) in an open position where an upstream
confining part (11) is apart from a downstream confining part (12),
- providing a capsule (1) to the interior of said product preparation device (10),
in particular a capsule (1) according to any one of claims 1 to 14, whereby said capsule
(1) presents a rim region (24) and a sealing element (4),
- actuating said product preparation device (10) in a closing movement until reaching
a closed position where said upstream and downstream confining parts (11, 12) that
confine said capsule (1),
characterized in that during said closing movement of product preparation device (10), said upstream confining
part (11) displaces said sealing element (4) of said capsule (1) to a position next
to the upstream-oriented surface of the rim region (24), so that said sealing element
(4) provides a sealing function of pressurized liquid flow between the interior and
exterior of said product preparation device (10).