U.S. patent application number 11/421262 was filed with the patent office on 2007-12-06 for leak tight dispensing pot for a solid or paste product.
This patent application is currently assigned to Alcan Packaging Beauty Services. Invention is credited to Fabrice Dieudonat, Anne-Sophie Vintimiglia.
Application Number | 20070278129 11/421262 |
Document ID | / |
Family ID | 38788850 |
Filed Date | 2007-12-06 |
United States Patent
Application |
20070278129 |
Kind Code |
A1 |
Dieudonat; Fabrice ; et
al. |
December 6, 2007 |
LEAK TIGHT DISPENSING POT FOR A SOLID OR PASTE PRODUCT
Abstract
The pot comprises a body in which a cavity is formed with an
upper opening and a lid, the lid and the body being fixed by a
hinge. This pot is characterized in that: a) it comprises a closing
means that can be activated by manual pressure, the closing means
comprising an upper closing element fixed to the lid cooperating
with a lower closing element fixed to the body, b) the lid
comprises a seal, made of a material with elastic resilience, and
c) the upper opening is surrounded by an upper rim that will
cooperate with the seal when the pot is closed, such that the seal
is compressed in a leak tight manner between the upper rim and the
lid when the pot is closed.
Inventors: |
Dieudonat; Fabrice; (Fosses,
FR) ; Vintimiglia; Anne-Sophie; (Paris, FR) |
Correspondence
Address: |
BANNER & WITCOFF, LTD.
TEN SOUTH WACKER DRIVE, SUITE 3000
CHICAGO
IL
60606
US
|
Assignee: |
Alcan Packaging Beauty
Services
Chevillly-Larue
FR
|
Family ID: |
38788850 |
Appl. No.: |
11/421262 |
Filed: |
May 31, 2006 |
Current U.S.
Class: |
206/581 |
Current CPC
Class: |
A45D 40/22 20130101;
A45D 40/0068 20130101; A45C 13/008 20130101 |
Class at
Publication: |
206/581 |
International
Class: |
B65D 69/00 20060101
B65D069/00 |
Claims
1. A pot for a paste or solid product comprising: a body having a
cavity with an upper opening, a lid for closing the upper opening,
and a hinge for connecting the lid and the body, the hinge formed
by cooperation of a first hinge element fixed to the body and a
second hinge element fixed to the lid, the pot characterized in
that: a) the pot comprises a closing assembly activated by manual
pressure, the closing assembly comprising an upper closing element
fixed to the lid in cooperating engagement with a lower closing
element fixed to the body for locking the lid with respect to the
body, b) the lid comprises a seal made of a material with elastic
resilience, the seal cooperating with the upper opening when the
pot is closed, c) the upper opening is surrounded by an upper rim
that cooperates with the seal when the pot is closed, the seal
being compressed between the upper rim and the lid when the pot is
closed.
2. Pot according to claim 1 in which the body comprises a central
liner fixed to a lower frame, the lower frame surrounding the
central liner and forming a support for the central liner.
3. Pot according to claim 2 in which the central liner comprises
the upper rim at its upper end.
4. Pot according to claim 1 in which the upper rim is an axial rim
with a width less than about 5 mm and height H.sub.R equal to or
greater than the thickness E.sub.J of the seal in an uncompressed
state facing the axial rim.
5. Pot according to claim 4 in which the axial rim is a rounded rim
with curvature R.sub.R between about 1 mm to about 5 mm.
6. Pot according to claim 2 in which the central liner is distinct
from the lower frame, the body comprising an axial assembly
obtained by axial snap fitting of the central liner in the lower
frame.
7. Pot according to claim 2 in which the central liner and the
lower frame form a single part.
8. Pot according to claim 2 in which the first hinge element of the
body is fixed to the lower frame.
9. Pot according to claim 2 in which the lower frame comprises a
lower skirt forming a generally vertical axial projection and a
generally horizontal part fixing the lower skirt to the central
liner through the upper rim.
10. Pot according to claim 1 in which the upper closing element
comprises at least one upper attachment means activated by a
push-button with elastic resilience, and in which the lower closing
element comprises at least one lower attachment means, application
of a manual pressure on the push-button making the push-button move
along a travel distance, the upper attachment means being displaced
with respect to the lower attachment means to unlock the lid from
the body.
11. Pot according to claim 10 in which the lower attachment means
is a hook fixed to the central liner and generally the upper
rim.
12. Pot according to claim 10 in which the push-button is an axial
push-button, and the upper attachment means being displaced an
axial travel distance, the lid comprising an axial recess through
which the axial push-button passes.
13. Pot according to claim 12 in which the axial recess is a
central recess, the lid and the central recess generally having the
same center or axis of symmetry.
14. Pot according to claim 10 in which, in the absence of the
manual pressure, the push-button and the lid are continuous on the
surface, the push-button and the lid having external surfaces
continuous with a common tangent.
15. Pot according to claim 1 in which the lid comprises an outer
shell comprising the axial recess or the central recess, the outer
shell being fixed to the second fixed hinge element or forming a
single-piece molded part with the second hinge element.
16. Pot according to claim 15 in which the outer shell comprises an
upper skirt and an arch, the upper skirt and the arch joining each
other at a fillet angle of about 90.degree..
17. Pot according to claim 16 in which at least a part of the upper
skirt of the outer shell is an axial or straight upper skirt and
the lower skirt of the frame is an axial or straight lower skirt,
the outer surfaces of the upper skirt and lower skirt aligned with
each other.
18. Pot according to claim 17 in which the lid comprises an inner
plate having a central part forming a support for the seal, the
seal insertable into the central part, and a peripheral part fixed
to the outer shell.
19. Pot according to claim 18 in which the central part of the
inner plate and the arch of the shell are spaced axially a distance
greater than or equal to the axial travel distance of the
push-button to enable axial displacement of the push-button.
20. Pot according to claim 19 in which the peripheral part of the
inner plate comprises an axial border providing the axial
spacing.
21. Pot according to claim 18 in which the central part and the
peripheral part of the inner plate are connected to each other
through an intermediate part in the form of an inverted "U" with
axial elasticity, the central part having axial mobility with
respect to the peripheral part, the lid applying an approximately
uniform axial pressure on the part of the seal in contact with the
upper rim when the pot is closed.
22. Pot according to claim 18 in which the upper attachment means
is supported by a connecting part cooperating with the push-button,
the travel distance of the push-button displacing the upper
attachment means to unlock the lid.
23. Pot according to claim 22 in which the push-button includes an
axial projection provided with a beveled lower plane, and the
connecting part includes a horizontal projection provided with a
beveled plane at its central end, the beveled planes cooperating
with one another, the axial travel distance of the push-button
radially or transversely displacing the connecting part and the
upper attachment means.
24. Pot according to claim 10 in which the push-button comprises
two lateral bending arms to form an elastic resilient means for the
push-button when the manual pressure or the axial pressure is not
applied.
25. Pot according to claim 22 in which the connecting part includes
two front bending arms to form an elastic resilient means for the
connecting part.
26. Pot according to claim 1 in which the seal is a plane seal
closing off the upper opening when the pot is closed.
27. Pot according to claim 26 in which the plane seal forms or
comprises a layer of a material forming a barrier to gases or
aromas.
28. Pot according to claim 1 in which at least the body forms or
comprises a layer of a material forming a barrier to gases or
aromas.
29. Pot according to claim 1 in which the hinge comprises an
automatic opening or pre-opening means, the automatic opening or
pre-opening means comprising a spring to rotate the lid when the
closing means has been activated manually.
30. Pot according to claim 1 in which the capacity of the body or
the central liner is between about 15 cm.sup.3 to about 200
cm.sup.3.
31. Pot according to claim 1 in which the body and the lid have the
same cross-sectional shape.
32. Pot according to claim 1 having a height H between about 15 mm
to about 60 mm.
Description
FIELD OF THE INVENTION
[0001] The invention relates to the domain of dispensers for
cosmetics and typically cosmetics with a solid or paste
consistency, for example creams. These cosmetics are usually
dispensed in pots.
BACKGROUND OF THE INVENTION
[0002] Conventional pots are known that comprise a body forming a
cavity to contain the cosmetic with an opening at the top that can
be closed by a closing means. The closing means is usually a lid or
a cap that can be screwed onto the body.
[0003] Firstly, conventional pots with a screwed lid have to be
held in two hands to open and close them. This presents certain
disadvantages in terms of manipulation and ergonomics. Moreover,
once the lid has been unscrewed, it has to be put down adjacent to
the pot, and this has the disadvantage of taking up space.
Additionally, with a separate lid, there is a risk of it getting
lost.
[0004] Secondly, packagings of cosmetics have to be refilled,
particularly when the products themselves are refilled, to attract
the attention of users of the cosmetics and thus to encourage
buying.
[0005] Furthermore, formulations of cosmetics are continually
changing. Since some cosmetic compositions containing at least one
volatile constituent are being developed, it is important to have a
sealed dispenser adapted to these new formulations.
[0006] Finally, there is a need for dispensers adapted to use in
the bathroom, in other words dispensers that can be placed on a
work surface, that are easy to use directly and for example are
easy to open.
BRIEF SUMMARY OF THE INVENTION
[0007] According to the various embodiments of the invention, a pot
for holding a paste or solid product, typically a cosmetic,
comprises a body in which a cavity is formed with an upper opening
and capable of containing the product, and a lid to close the upper
opening. The lid and the body are fixed by a hinge formed by
cooperation of a first hinge element fixed to the body with a
second hinge element fixed to the lid.
[0008] This pot is characterized in that: [0009] a) the pot
comprises a closing means that can be activated by manual pressure,
typically an axial pressure, the closing means comprising an upper
closing element fixed to the lid cooperating with a lower closing
element fixed to the body so as to manually lock/unlock the lid
with respect to the body, [0010] b) the lid comprises a seal made
of a material with elastic resilience, capable of cooperating with
the upper opening when the pot is closed, [0011] c) the upper
opening is surrounded by an upper rim that will cooperate with the
seal when the pot is closed, such that the seal is compressed in a
leak tight manner between the upper rim and the lid when the pot is
closed.
[0012] The pot can be opened easily by applying a simple manual
pressure, and typically an axial pressure. The pot is ergonomic in
use and just as easy to close, since all that is necessary is to
pivot the lid around its hinge. Furthermore, since the lid is fixed
to the body by the mechanical connecting hinge, there is no risk of
losing it while the contents of the pot are being applied onto the
body.
[0013] Largely due to its closing means that can be activated by
manual pressure and typically by an axial pressure, this pot is
different from existing pots and thus provides a means of renewing
or refilling packagings of cosmetics, which is very important
commercially.
[0014] Finally, the design of this pot assures preservation and use
of product formulations containing a volatile constituent, which
can also be used to package new formulations.
BRIEF DESCRIPTION OF THE FIGURES
[0015] FIG. 1a is a front perspective view of a closed pot (1).
[0016] FIG. 1b shows a back perspective view of the pot in FIG.
1a.
[0017] FIG. 1c shows a top view of the pot in FIG. 1a.
[0018] FIG. 2a shows a section through the pot along the vertical
plane A-A in FIG. 1c.
[0019] FIG. 2b shows a section through the pot along the vertical
plane B-B in FIG. 1c.
[0020] FIG. 2c shows a section through the pot along a vertical
plane C-C in FIG. 2b.
[0021] FIG. 2d illustrates a variant of the body composed of a
single-piece molded part.
[0022] FIGS. 3a to 3b are partial enlarged diagrammatic views of
part of FIG. 2a (top left part) and are intended to illustrate the
closing means forming the mechanism for locking and unlocking the
lid of the pot (1).
[0023] FIG. 3a shows the pot with its lid locked.
[0024] FIG. 3b shows the pot with its lid unlocked by manual axial
pressure (13) applied on the push-button (6, 6').
[0025] FIG. 3c is a partial enlarged diagrammatic view of part of
FIG. 2b (top left part).
[0026] FIGS. 4a and 4b are perspective views of the lower frame of
the body (2) of the pot in FIG. 1a. FIG. 4a is a top view. FIG. 4b
is a bottom view.
[0027] FIGS. 5a and 5b are perspective elevation views of the
central liner of the body (2).
[0028] FIGS. 6a and 6b are perspective views of the outer shell of
the lid (3) of the pot in FIG. 1a. FIG. 6a is a top view. FIG. 6b
is a bottom view.
[0029] FIGS. 7a and 7b are perspective views of the inner plate of
the lid (3).
[0030] FIG. 7a is a bottom view that shows the cavity that houses
the seal (32).
[0031] FIG. 7b is a top view.
[0032] FIGS. 8a and 8b are perspective views of the push-button (6,
6') of the lid forming a part of the closing mechanism (11). FIG.
8a is a top view. FIG. 8b is a bottom view.
[0033] FIGS. 9a and 9b are perspective views of the outer shell
connecting part of the lid, forming a part of the closing mechanism
(11). FIG. 9a is a top view. FIG. 9b is a bottom view.
[0034] FIGS. 9c and 9d are partial cross-sections that show the
resilient or elastic displacement of the axial projection (92)
supporting the upper hook (310, 310') in a transverse horizontal
plane, due to bending of the two bending arms (91), and this
displacement enables locking/unlocking of the lid. FIG. 9c shows
the connecting part "at rest". FIG. 9d shows the connecting part
(9') "activated" and compressed when an axial manual pressure is
applied on the push-button.
[0035] FIGS. 10a and 10b are composite perspective views that show
the assembly of three parts of the lid that contribute to forming
the closing mechanism (11) FIG. 10a shows the front of the pot (1).
FIG. 10b shows the back of the pot (1).
[0036] FIGS. 11a to 11c illustrate lids fitted with push-buttons
with different cross-sections and placed at different locations on
the lid.
DETAILED DESCRIPTION OF THE INVENTION
[0037] Referring to FIGS. 1a to 1c, aspects of the invention relate
to a pot (1) for holding solid product. Referring also to FIGS. 2a
and 2b, the body (2) may comprise a central liner (4) fixed to a
lower frame (5), the lower frame surrounding the central liner and
forming a support for the central liner (4). In general, the
central liner may comprise the upper rim (24, 24', 24'') at its
upper end.
[0038] As illustrated in FIG. 3c, the upper rim may be an axial rim
with a width typically less than 5 mm and height H.sub.R equal to
at least the thickness E.sub.J of the seal facing the axial rim
(24'), the thickness E.sub.J being the thickness of the seal in the
uncompressed state. As can be seen in FIG. 3c, the height H.sub.R
is the free rim height located above the horizontal part (51) of
the frame (5). The axial rim may be a rounded rim with curvature
R.sub.R. In certain aspects, R.sub.R may vary from 1 mm to 5
mm.
[0039] In embodiment of the pot such as illustrated in the Figures,
the central liner and the lower frame may each form a distinct
part, typically a plastic molded part, the body comprising an
assembly, typically an axial assembly obtained by axial snap
fitting of the central liner in the lower frame (5).
[0040] However according to another embodiment of the invention, as
illustrated in FIG. 2d, the central liner and the lower frame may
form a single part, typically a plastic molded part.
[0041] Typically, the first hinge element of the body may be fixed
to the lower frame (5). For example, as illustrated in FIGS. 2b and
3c, the lower frame may comprise a lower skirt (50, 50') forming a
typically vertical axial projection and a typically horizontal part
(51) fixing the lower skirt (50, 50') to the central liner through
their upper rim. The central liner is generally fixed to the lower
frame by axial snap fitting.
[0042] As can be seen in FIGS. 2a and 3a to 3b, the upper closing
element may comprise at least one upper hook or attachment means
(310, 310') that can be activated by a push-button (6, 6') with
elastic resilience, in which the lower closing element comprises at
least one lower hook or attachment means such that a manual
pressure applied on the push-button (6, 6') makes the push-button
(6, 6') move along a travel distance and consequently causes
displacement of the upper hook or attachment means (310, 310') with
respect to the lower hook or attachment means (210). The
displacement of the upper hook or attachment means (310, 310')
unlocks the lid from the body (2).
[0043] The lower hook or attachment means may be a hook fixed to
the central liner and typically the upper rim (24).
[0044] In embodiments of the pot such as illustrated in the
figures, the push-button (6) may be an axial push-button (6'), and
the displacement is then an axial travel distance, the lid
comprising an axial recess through which the axial push-button (6')
passes. The axial recess may be a central recess (33') as
illustrated in FIG. 1c, such that the lid and the central recess
(33') typically have the same centre or axis of symmetry (12). In
this case, the axial push-button (6') is a central push-button.
This axial push-button (6') is centered and it has a square
cross-section as illustrated in FIGS. 1a and 1c. The axial
push-button (6'), however, may not necessarily be centered or may
not necessarily have a square cross-section, such as illustrated
for example in FIGS. 11a to 11c. In FIG. 11a, the axial push-button
is shown as having a semi-circular cross-section and being placed
at the center of the front part of the lid. In FIG. 11b, the axial
push-button is shown as having a rectangular cross-section and
being placed at the center of the back part of the lid. In FIG.
11c, the axial push-button is shown as having a circular
cross-section and being placed at the left of the front part of the
lid.
[0045] As illustrated in FIGS. 1a and 1b, in the absence of the
manual pressure, and typically when the pot is closed, the
push-button (6, 6') and the lid may be continuous on the surface,
the push-button (6, 6') and the lid having external surfaces that
are typically continuous with a common tangent.
[0046] As shown diagrammatically in FIGS. 3a to 3c, and as shown in
FIGS. 6a and 6b, the lid may comprise an outer shell (7), if
applicable comprising the axial recess or the central recess (33'),
the outer shell being fixed to the second fixed hinge element or
typically forming a single-piece molded part with the second hinge
element (30).
[0047] The outer shell may comprise an upper skirt and an arch
(71), the upper skirt and the arch joining each other at a fillet
angle typically close to 90.degree.. However, other forms are
possible according to embodiments of the invention, for example
including rounded parts. Typically, all or part of the upper skirt
of the outer shell may be an axial or straight upper skirt and the
lower skirt (50) of the frame may be an axial or straight lower
skirt (50'), the outer surfaces of the upper skirt and lower skirt
(50') typically being in line with each other.
[0048] As illustrated particularly in FIGS. 3a to 3c, and as shown
in FIGS. 7a and 7b, the lid may comprise an inner plate provided
with a central part forming a support for the seal (32), typically
by means of a cavity formed in the inner plate and in which the
seal is inserted, and a peripheral part fixed to the outer shell
(7), typically by means of axial snap fitting as shown in FIG.
3c.
[0049] The central part of the inner plate and the arch of the
shell may be at an axial spacing equal to at least the axial travel
distance of the push-button (6') so as to enable axial displacement
of the push-button (6'). The peripheral part of the inner plate may
comprise an axial border providing the axial spacing.
[0050] As illustrated particularly in FIG. 3c and in FIGS. 7a and
7b, the central part and the peripheral part of the inner plate may
be connected to each other through an intermediate part (83),
typically in the form of an inverted "U" with axial elasticity. The
central part thus may have a certain axial mobility with respect to
the peripheral part (81). When the pot is closed, the lid can apply
an approximately uniform axial pressure on the seal and
particularly on the part of the seal in contact with the upper rim
(24). FIG. 3c illustrates the leak tight cooperation of the seal of
the lid with the upper rim of the body, particularly due to
permanent compression applied on the seal by the central part of
the inner plate of the lid.
[0051] As can be seen in FIG. 7b, this intermediate part (83) is
circular and is external to the circular upper rim of the body or
its liner (4). It is not continuous and for example forms three
angular sectors located at 120.degree. from each other separated by
perforated parts without the intermediate part (83), so as to
provide a good compromise between an axial compression force and an
axial elasticity.
[0052] As illustrated in FIGS. 3a and 3b and as shown in FIGS. 9a
and 9b, the upper hook or attachment means (310, 310') may be
supported by a connecting part cooperating with the push-button (6,
6'), such that the travel distance of the push-button (6, 6') can
cause the displacement of the hook or upper attachment means and
thus unlock the lid (3). The hook or upper attachment means (310,
310') may be supported by an axial projection (92) of the
connecting part.
[0053] As illustrated in FIGS. 3a and 3b and as shown in FIGS. 8a
and 8b, the push-button (6, 6') may include an axial projection
provided with a beveled lower plane (600), and the connecting part
may include a horizontal projection (90) provided with a beveled
plane (900) at its central end. The beveled planes (900) cooperate
such that the axial travel distance of the push-button (6, 6')
causes a radial or transverse displacement of the connecting part
and consequently of the upper hook or attachment means (310,
310').
[0054] As illustrated in FIGS. 8a and 8b, the push-button (6, 6')
may typically comprise two lateral bending arms (61) so as to form
an elastic resilient means for the push-button (6, 6'),
particularly when manual pressure or axial pressure is no longer
applied. These side arms (61) are inclined at an angle .alpha. from
the central bearing surface (62) of the push-button (6, 6'), such
that an axial compression leads to an axial travel distance thus
unlocking the lid.
[0055] As illustrated in FIGS. 9a and 9b, the connecting part may
include two front bending arms (91) so as to form an elastic
resilient means for the connecting part (9).
[0056] According to an embodiment of the pot shown in the figures,
the seal may be a plane seal (32') closing off the entire the upper
opening when the pot is closed. The plane seal (32') may form or
comprise a layer of a material forming a barrier to gases,
typically oxygen or water vapor, or aromas. In this case, the plane
seal is formed from a multi-layer composite material. Similarly, at
least the body and preferably at least the central liner may form
or comprise a layer of a material forming a barrier to gases,
typically oxygen or water vapor, or aromas. The result is pots
adapted to all sorts of products and satisfying even stringent
requirements in terms of shelf life, even when these products
include volatile constituents or constituents sensitive to air.
[0057] FIGS. 10a and 10b illustrate the push-button (6, 6') and the
connecting part placed on the inner plate (8), the outer shell not
being shown. This assembly of three parts is shown placed on the
body as if the lid comprises the outer shell (7).
[0058] As illustrated in FIG. 2c, the hinge may comprise an
automatic opening or pre-opening means (100), the automatic opening
or pre-opening means (100) typically comprising a spring (101) so
as to rotate the lid as soon as the closing means has been
activated manually.
[0059] By way of example, the capacity of the body or the central
liner may vary from about 15 cm.sup.3 to about 200 cm.sup.3, and
preferably from about 40 cm.sup.3 to about 80 cm.sup.3. The body
and the lid may have the same cross-section, the cross-section
typically being square or oval or rectangular or round. The pot may
have a height H varying from about 15 mm to about 60 mm, and
preferably from about 30 mm to about 40 mm.
[0060] Pots according to embodiments of the invention are
ergonomic, in other words easy to use, open and close for users who
need to use the product contained in the pot, particularly due to
its axial push-button. The pots can have an arbitrary form or
cross-section, the body comprising a central liner forming a
receptacle for the product, the liner being concealed by an inner
skirt visible only from the outside, such that the pots can be
manufactured in a wide variety of external shapes, possibly while
keeping the same central liner. Finally, the pots provide excellent
leak tightness and can be used for packaging all sorts of product
formulations, for example products with a typically paste or creamy
consistency that are collected on a finger or using a spatula or a
special applicator for application onto the body. However, the pots
can also be used to package any type of cosmetics or non-cosmetics,
for example pharmaceutical products.
EXAMPLES
Example 1
[0061] A first pot such as illustrated in FIGS. 1a to 10b, except
for FIG. 2d, was made. A second pot such as illustrated in FIG. 2d
also was made. These two pots were produced by molding different
parts made of a thermoplastic material.
[0062] Concerning the body of the pot, the central liner was
fabricated by molding according to FIGS. 5a and 5b, and the lower
frame was fabricated according to FIGS. 4a and 4b. The liner and
the frame were assembled by snap fitting in the case of the first
pot. The body formed a single molded part in the case of the second
pot. Concerning the lid of the pot (1), the following were made by
molding: [0063] an outer shell according to FIGS. 6a and 6b, [0064]
an inner plate according to FIGS. 7a and 7b, [0065] a push-button
(6, 6') according to FIGS. 8a and 8b, [0066] a connecting part
according to FIGS. 9a and 9b.
[0067] A seal with the same diameter as the cavity in the inner
plate was provided and assembled by fixing it in the cavity through
the inner rim (830) of the intermediate part (83).
[0068] The three parts of the lid that contribute to forming the
closing mechanism (11), namely the push-button (6, 6'), the
connecting part and the inner plate (8), were assembled, such as
illustrated in FIGS. 10a and 10b. The outer shell was assembled to
the inner plate by snap fitting. Finally, the hinge was formed
between the body and the lid (3). As illustrated in FIG. 2c, this
was done using a "left" hinge pin (14) and a "right" hinge pin
(15), The "left" hinge pin (14) was composed of a portion of a rod
fixing a first hinge element of the body to a second hinge element
of the lid. The "right" hinge pin (15) formed an automatic opening
means (100) comprising a spring (101), one end of which is fixed to
the first hinge element (20') of the body while the other end is
fixed to the second hinge element (30') of the lid, the "right"
hinge pin (15) being mounted with a torsion such that the spring
applies a torsion torque when the pot is closed, and in that this
torsion torque tends to automatically open the lid as soon as the
closing means is unlocked.
[0069] In this example, all hinge elements (20, 20', 30, 30') form
hub portions fixed in pairs by a hinge pin (14, 15), the two "left"
hinge elements and being fixed by the "left" hinge pin (14), and
the two "right" hinge elements (20') and (30') being fixed by the
"right" hinge pin (15) formed by the automatic opening means
(100).
Example 2
[0070] Pots according to FIGS. 11a to 11c were also manufactured.
In this example, the connecting part and possibly the position of
the upper hook (310) and the lower hook were adapted such that an
axial pressure applied on the push-button (6, 6') locks the lid
onto the body or unlocks it from the body, in a similar manner to
that described in detail particularly in FIGS. 10a and 10b.
[0071] All fabricated pots in the above examples were tested to
check their leak tightness. The pots were found to be leak tight
even after a large number of opening and closing operations
corresponding to normal use of the pot.
* * * * *