Field of the Invention
[0001] The present invention relates to a paint container comprising a receptacle and a
lid, wherein the lid comprises a metal lid portion and a plastic lid portion. The
metal lid portion is a central portion allowing the paint container to be used in
a punching type colorant dispenser punching the metal lid portion prior to dispensing
colorant into the paint. The plastic lid portion is a peripheral portion encircling
the metal lid portion.
Background Art
[0002] In order to obtain a certain colour of paint it is known to provide colorant into
neutral coloured paint using an automatic colorant dispenser apparatus. A colorant
dispenser apparatus adapted for metal paint containers may punch a hole in the container,
in the container lid, and provide the colorant into the container via the hole. Thereafter
the hole is plugged and the container is shaken to obtain an even colour distribution
of the paint. Such a punching type colorant dispenser apparatus is disclosed in
EP 0 779 241.
[0003] Since a punching type colorant dispenser apparatus punches the container it is important
that the container is rigid and designed to withstand the forces from the punch. The
punch should cause a hole in the centre area of the lid but the remaining parts of
the container must not be damaged.
WO 2007/055651 discloses a metal paint container which may be used in such colorant dispenser apparatus.
[0004] A problem with metal paint containers, such as the metal paint container shown in
WO 2007/055651, is that they are rather expensive to produce. Therefore, it is becoming more and
more common for paint producers to abandon metal paint containers and instead use
plastic paint containers. A plastic paint container may however not be used in a punching
type colorant dispenser apparatus since a plastic container is not rigid enough to
withstand the forces from the punching of the container. Instead, when colorant should
be provided into basic coloured paint in a plastic paint container, the lid must be
removed prior to inserting the paint container in a colorant dispenser apparatus.
A disadvantage of using plastic paint containers is, thus, that removing the lid requires
manual work.
[0005] One way of minimizing the costs, and in addition the weight, of a metal paint container
is to make the container as thin as possible, but still thick enough to be able to
withstand the forces from the punching type colorant dispenser apparatus. As is described
in
WO 2007/055651 the container may be made from a metal plate having an even thickness which is normally
between 0.1 mm and 0.5 mm. Further, in order to reduce the amount of material required
it is important to have good shape permanence, particularly at the edges of the container.
Summary of the Invention
[0006] It is an object of the present invention to provide a paint container which may be
used in a punching type colorant dispenser apparatus and which is cheaper than the
prior art paint containers. These and other objects are at least partly met by the
appended independent claims. Preferred embodiments of the present invention are presented
in the dependent claims.
[0007] The present invention relates to a paint container comprising a receptacle and a
lid, wherein the lid comprises a metal lid portion and a plastic lid portion. The
metal lid portion is a central portion allowing the paint container to be used in
a punching type colorant dispenser punching the metal lid portion prior to dispensing
colorant into the paint. The plastic lid portion is a peripheral portion encircling
the metal lid portion. The plastic lid portion comprises a lid sealing portion sealing
the lid to a circumferential receptacle sealing portion of the receptacle.
[0008] An advantage with the paint container is that the metal lid portion allows the container
to be used in a punching type colorant dispenser. However the entire lid is not made
of metal but only a portion of the lid, which may be punched, is made of metal. Since
the portion of the lid which seals to the receptacle is made of plastic it becomes
possible to have a larger portion of the lid made of plastic than in prior art paint
containers, which saves cost.
[0009] Preferably, the plastic lid portion comprises a holding portion to hold the lid onto
the receptacle. If the lid is held on the receptacle by means of, for instance, a
circumferential flange of the receptacle the plastic lid portion may be shaped with
a holding portion in the form of an edge to cooperate with the flange of the receptacle.
Since plastic is flexible it may be easy to seal, open and re-seal such a paint container.
[0010] In one embodiment the plastic lid portion is made in one piece with the lid sealing
portion. The lid sealing portion is integrated in the plastic lid portion. Thus, in
this embodiment the plastic lid portion comprises one piece of plastic which includes
the periphery of the lid as well as the lid sealing portion. Such an embodiment may
be favourable from a manufacturing point of view since it contains few components.
The lid sealing portion may seal directly onto the receptacle sealing portion or have
a separate packing or other sealing body which is attached to the to the lid sealing
portion to improve the sealing.
[0011] In one embodiment the receptacle sealing portion comprises a plastic receptacle sealing
portion. In this embodiment the receptacle sealing portion, as well as the lid sealing
portion, is made of plastic which allows the sealing of the paint container to take
place directly between the receptacle and the lid without having to have an intermediate
packing to assure a tight fit. In other words the plastic portion of the lid may seal
against a plastic portion of a receptacle.
[0012] Preferably, the receptacle is a plastic receptacle. Plastic paint receptacles are
cheaper to manufacture than metal paint receptacles. Thus, by this embodiment it is
possible to have a paint container which is, for the most part, made of plastic, i.e.
the entire receptacle and a portion of the lid is made of plastic, but which is still
possible to use in a punching type colorant dispenser.
[0013] Preferably, the lid comprises a joint portion along which a peripheral portion of
the metal lid portion is joined to a fixing portion of the plastic lid portion. The
peripheral portion of the metal lid portion may be embedded in the fixing portion
of the plastic lid portion along said joint portion. Thus, the joint portion comprises
a portion of the plastic lid portion, i.e. the fixing portion, and a portion of the
metal lid portion, i.e. the peripheral portion of the metal lid portion. It may be
preferred that the peripheral portion of the metal lid portion has the same circumferential
shape as the lid and the receptacle, for instance circular. However it is also possible
that the peripheral portion of the metal lid portion has a different circumferential
shape than the lid and the receptacle. For instance the peripheral portion of the
metal lid portion may have some protrusions which are embedded deeper into the fixing
portion of the plastic lid portion to strengthen the joint between the metal and plastic
portions of the lid at certain points.
[0014] In one embodiment the lid sealing portion encircles the joint portion. Thus, the
joint portion is located closer to the centre of the lid than the lid sealing portion.
Since the periphery of the metal lid portion is included in the joint portion this
embodiment has the entire metal lid portion encircled by the lid sealing portion.
[0015] Preferably, the joint portion comprises between 1 mm and 50 mm of the periphery of
the metal lid portion, more preferably between 2 mm and 30 mm of the periphery of
the metal lid portion, most preferably between 4 mm and 15 mm of the periphery of
the metal lid portion. In one embodiment the joint portion comprises between 1 mm
and 50 mm of the periphery of the metal lid portion. In order for the joint to be
leak proof the periphery of the metal lid portion, which is included in the joint
portion, should have a certain size, however, in order to minimize the content of
metal in the lid, and thus lowering the costs of the lid, the joint portion should
not be too large.
[0016] In one embodiment the peripheral portion of the metal lid portion comprises a bent
portion having at least one a bend. A bent metal portion may be joined in a more durable
manner with a fixing portion of the plastic lid portion. In particular, when exposed
to a force, such as the force from a punching type colorant dispenser, a bent metal
portion may be less likely to slide out of the fixing portion since the bent metal
portion is firmly held within the fixing portion and may transfer forces to the fixing
portion rather than sliding out of the fixing portion.
[0017] In one embodiment the bent portion comprises at least two bends. A bent metal portion
which is bent twice may stay even better within the fixing portion of the plastic
lid portion. This may in particular be the case if the two bends are made in opposite
directions. For instance, if a first bend of the peripheral portion of the metal lid
portion is made upwards, with respect to the horizontal main direction of the lid,
and a second bend is made downwards. The present invention further relates to a colour
refraction method comprising arranging a paint container in a punching type colorant
dispenser, wherein the paint container is sealed by a circumferential receptacle sealing
portion of a receptacle in cooperation with a circumferential lid sealing portion
of a plastic lid portion of a lid; punching an opening in a metal lid portion of the
lid, the metal lid portion being a central portion of the lid and being encircled
by the plastic lid portion; and dispensing colorant into the paint. The receptacle
may be a plastic receptacle.
Brief description of the Drawings
[0018] The present invention will now be described in more detail, with reference to the
appended drawings showing embodiments of the present invention, in which:
Fig. 1 is a perspective view of a paint container according to one embodiment of the
invention;
Fig. 2a is a side view, in cross section, of the paint container of Fig 1;
Fig. 2b is a side view, in cross section, of a portion of the paint container;
Fig. 3a is a perspective view of two paint containers stacked on top of each other;
Fig. 3b is a side view, in cross section, of the two paint containers of Fig. 3a;
Fig. 3c is a side view, in cross section, of a portion of the two paint containers.
Description of Preferred Embodiments
[0019] The invention will now be described in more detail by means of examples and with
reference to the accompanying drawings.
[0020] Fig. 1 shows a paint container 1 according to the invention. The paint container
1 includes a receptacle 2 and a lid 4. The receptacle 2 will from now on will be referred
to as pail 2. The pail 2 has a circular bottom 6 and a circumferential wall 8. The
pail 2 is made of a plastic material such as polypropylene. The lid 4 is circular
and seals the pail 2 at an upper portion 10 of the circumferential wall 8. The sealing
will be described in more detail with reference to Figs 2a-b below. The wall 8 is
folded outwards at the upper portion 10 forming a circumferential fold 12. The fold
12 gives stability to the pail 2 and serves as a base for a handle 14. Further, the
fold 12 serves as a support for the lid 4 and facilitates opening the container 1
by a recess 16 and a lug 18 arranged in the fold 12.
[0021] A peripheral portion 20 of the lid 4 is made of a plastic material such as polypropylene
and the remaining part of the lid 4, i.e. the central portion 22 of the lid 4 is made
of a metal such as steel. Any suitable metal or metal alloy may be used in the central
portion 22. For instance metals known from containers used in prior art punching type
colorant dispenser apparatus may be used.
[0022] The peripheral plastic portion 20 of the lid 4 will hereinafter be referred to as
"plastic lid portion 20" and the central metal portion 22 of the lid 4 will hereinafter
be referred to as "metal lid portion 22". The plastic lid portion 20 encircles the
metal lid portion 22. A junction 24 between the plastic lid portion 20 and the metal
lid portion 22 is located rather close to the pail 2 wall 8, when the lid 4 is arranged
on the pail 2. The junction 24, also referred to as "joint portion 24", will be described
in more detail with reference to Figs 2a-b below.
[0023] The metal lid portion 22 allows the paint container 1 to be used in a punching type
colorant dispenser punching a hole (not shown) in the metal lid portion 22 and dispensing
colorant through the hole. In order for the lid 4 to withstand and distribute the
forces well from such punching, the metal lid portion 22 has a circumferential elevation
26. The circumferential elevation 26 allows the forces from the colorant dispenser
to be absorbed and contributes to an increasing structural strength of the lid 4.
[0024] Figs 2a and 2b show the paint container 1 of Fig. 1. Fig. 2b is a close up view of
a portion, marked with a circle in Fig. 2a, of the sealing between the pail 2 and
the lid 4. For clarity reasons the container 1 is illustrated empty, however having
the lid 4 arranged on the pail 2 sealing the container 1. As is mentioned above, the
upper portion 10 of the pail 2 wall 8 terminates in a fold 12. Thus, the pail opening
28, when the lid 4 is removed from the pail 2, is defined by the upper portion 30
of the pail 2 wall 8. Paint may be filled into the pail 2 through the opening 28 before
the lid 4 is arranged on the pail 2.
[0025] The fold 12 is formed with a circumferential flange 38. A holding portion in the
form of a circumferential edge 40, which is adapted to co-operate with the flange
38, is formed in the lid 4, in the plastic lid portion 20 thereof. When the lid 4
is arranged on the pail 2, the circumferential edge 40 is held below the circumferential
flange 38 of the pail 2 to hold the lid 4 on the pail 2. In other words, co-operation
of the flange 38 of the pail 2 and the edge 40 of the lid 4 holds the lid 4 on the
pail 2. Further, the fold 12 of the pail 2 wall 8 is formed with a circumferential
shoulder 42 onto which a circumferential rim 44 of the plastic lid portion 20 rests.
[0026] As described above, the lid 4 consists of a metal lid portion 22 which is surrounded
by a plastic lid portion 20. The metal lid portion 22 occupies most of the lid 4 area
covering the pail 2 opening 28. The periphery 48 of the metal lid portion 22 is embedded
in a fixing portion 50 of the plastic lid portion 20. Thus, the joint portion 24,
where the metal lid portion 22 is joined to the plastic lid portion 20, consist of
a portion of the metal lid portion, i.e. the periphery 48 of the metal lid portion
22, and a portion of the plastic lid portion 20, i.e. the portion 50 of the plastic
lid portion 20 which is closest to the centre of the lid 4. The periphery 48 of the
metal lid portion 22 is shaped such as to avoid that the periphery 48 may slide out
of the fixing portion 50 of the plastic lid portion 20 due to, for example, forces
from a punching type of colorant dispenser. In the embodiment shown in the drawings
the periphery 48 of the metal lid portion 22 comprises a locking portion 49 having
the shape of a hook. The locking portion 49 has been formed by first bending the metal
lid portion 22, at the periphery 48, upwards, to a first bend 52 being approximately
90° to a direction of the horizontal main plane of the lid 4, i.e. to a direction
parallel to the bottom 6 of the container 1. Thereafter the metal lid portion 22 has,
at the periphery 48, been bent in the opposite direction with reference to the first
bend 52, to a second bend 54 being approximately 180° and with a radius of about 0.8
mm, giving the locking portion 49 of the metal lid portion 22 its hook-like shape.
Thereafter the locking portion 49 of the metal lid portion 22 has been embedded in
the fixing portion 50 of the plastic lid portion 20 to form a leak proof and durable
two-component lid 4.
[0027] Sealing of the container 1 occurs mainly at the upper portion 30 of the pail 2 wall
8 why the upper portion 30 of the pail 2 wall 8 will hereinafter be referred to as
"pail sealing portion" or "receptacle sealing portion". The pail sealing portion 30
cooperates with a lid sealing portion 46 of the lid 4 to seal the container 1. The
lid sealing portion 46 is a portion of the plastic lid portion 20, thus, sealing of
the lid 4 to the pail 2 takes place at the plastic lid portion 20. The entire lid
sealing portion 46 is made of plastic. The lid sealing portion 46 is located outside
of the joint portion 24 and comprises a recess 56 into which the pail sealing portion
30 is fitted when the lid 4 is arranged on the pail 2. The above mentioned circumferential
edge 40 and circumferential rim 44 of the lid 4 surrounds the recess 56.
[0028] Interior of the pail sealing portion 30, i.e. at the right side of the pail sealing
portion 30 as seen in Fig. 2b, an interior wall 34 of the pail 2 is somewhat inclined
along an inclined portion 36 to allow a portion of the plastic lid portion 20 to be
compressed to a tight fit onto the pail 2. Below the inclined portion 36 the interior
wall 34 of the pail 2 is essentially vertical.
[0029] Interior of the lid sealing portion 46, i.e. on the right side of the lid sealing
portion 46 as seen in Fig. 2b, the above mentioned joint portion 24 of the lid 4 is
seated. The joint portion 24 of the lid 4 comprises the locking portion 49 of the
metal lid portion 22. In the disclosed embodiment the locking portion 49 is shaped
as an upwardly and outwardly bent hook. Further, the joint portion 24 of the lid 4
comprises the fixing portion 50 in which the locking portion 49 is embedded. The locking
portion 49 is embedded in the fixing portion 50 of the plastic lid portion 20 along
the entire joint portion 24.
[0030] Thus, the joint portion 24 of the lid 4 is defined as the portion of the lid 4 which
comprises the locking portion 49 of the metal lid portion 22 embedded in the fixing
portion 50 of the plastic lid portion 20. In other words, the plastic lid portion
20 and the metal lid portion 22 are overlapping at the joint portion 24 of the lid
4. As is seen in Fig. 2b the entire joint portion 24 is located interior of the pail
sealing portion 30. In other words, when the lid 4 is arranged on the pail 2, the
pail sealing portion 30 encircles the joint portion 24 of the lid 4. As illustrated
in Fig. 2b, the metal lid portion 22 will be arranged within the boundaries set by
the pail sealing portion 30 and the lid sealing portion 46. The joint portion 24 is
circumferential and extends along the entire periphery 48 of the metal lid portion
22.
[0031] There are pail sealing surfaces 58, 59 on both sides of a tip 32 of the pail sealing
portion 30. The pail sealing surfaces 58, 59 cooperate with lid sealing surfaces 60,
61 of the lid sealing portion 46 to seal the container 1. Thus, sealing of the container
1 takes place at the pail sealing surfaces 58, 59 and the lid sealing surfaces 60,
61, respectively. The lid sealing surfaces 60, 61 are contained within the plastic
lid portion 20. The entire metal lid portion 22 and the entire joint portion 24 are
located closer to the centre of the lid 4 than anyone of the lid sealing surfaces
60, 61.
[0032] The thickness of the pail 2 wall 8 may be between 0.2 - 3 mm, for instance about
1.2 mm. The thickness of the plastic lid portion 20 of the lid 4 may be between 0.2
- 5 mm, for instance about 2 mm at the joint portion 24 and about 1.0 mm exterior
of the joint portion 24, i.e., at the rim 44 of the lid 4. The thickness of the metal
sheet constituting the metal lid portion 22 of the lid 4 may be between 0.1 - 2 mm,
for instance about 0.35 mm.
[0033] If the paint is to be colour refracted at a later stage, e.g. at a paint dealer store,
neutral coloured paint may be filled into the pail 2 at a paint factory, the lid 4
may be arranged on the pail 2 to seal the paint container 1, and the paint container
1 may be transported to the paint dealer store. A punching type colorant dispenser,
such as that disclosed in
EP 0 779 241, may be stationed at the paint dealer store and the desired colour is obtained by
placing the paint container 1 in the colorant dispenser, without having to remove
the container lid 4, and dispense colorant through a hole (not shown) punched in the
lid 4 by the colorant dispenser. After the colour has been provided into the paint
the hole may be sealed by a plug.
[0034] As mentioned above with reference to Fig. 1 there is a circumferential elevation
26 in the metal lid portion 22, rather close to the joint portion 24. One purpose
the elevation 26 is to allow the forces from a punching type colorant dispenser to
be distributed in a favourable manner at the metal lid portion 22.
[0035] Another purpose of the elevation 26 in the metal lid portion 22 is illustrated in
Figs 3a-c which illustrate two paint containers 62, 63, each one similar to the paint
container 1 described in connection to Fig. 1, stacked on top of each other. The elevation
26 in the lid 4 of the lower container 63 of the two stacked paint containers 62,
63 allows, which is best shown in Fig. 3c showing a close up view of the area in the
circle in Fig. 3b, the upper container 62 to be stacked onto the lower container 63
in a stable manner. The elevation 26 in the lid 4 of the lower paint container 63
result in a recess 64, located exterior of the elevation 26 with respect to the centre
of the lid 4. The recess 64 in the lid 4 of the lower container 63 cooperates with
a circumferential edge 66 of the pail 2 of the upper paint container 62. The circumferential
edge 66 is the lowest portion 66 the pail 2 wall 8 and projects downwards, past the
pail 2 bottom 6 of the upper paint container 62. Moreover, the recess 64 in the lid
4 is encircled by an inclined surface 68 which facilitates placing one container 62
on the lid 4 of another container 63 by aligning the containers 1.
[0036] Moreover, the lid 4 is designed to be stackable onto another lid (not shown) to facilitate
handling and save space if lids are transported or stored separate from the pails.
An upper portion 70 of the plastic lid portion 20 is flat and may support the underside
72 of the joint portion 24, which is also flat along a portion. Thus several lids
may be stacked onto each other in a stable manner.
[0037] It will be appreciated that numerous variants of the embodiments described above
are possible within the scope of the appended claims. For example, in the disclosed
exemplary embodiment of the invention the seal between the pail and the lid is a seal
between two plastic components. It is however possible to integrate a rubber sealing
packing or another sealing arrangements in the lid sealing portion and/or in the pail
sealing portion, the seal between the pail and the lid taking place between such packing
and the lid sealing portion, or the pail sealing portion, as the case may be.
[0038] It has been described above that the entire lid sealing portion 46 is made of plastic.
However in another embodiment it may be possible that the paint container has a metal
lid portion which serves as a sealing portion.
[0039] In the embodiments described inhere the pail is a plastic pail, however the lid may
be adapted to suit also a pail which is partly or entirely made of another material
such as metal.
[0040] The pail has been described refereeing to a receptacle having a circular opening.
However the pail may be any suitable receptacle, and thus the lid, may have any suitable
shape. For instance the receptacle may be oval or shaped with a rectangular bottom
and opening and thus have a lid with a corresponding shape.
[0041] The locking portion 49 of the metal lid portion 22 has been shown as bent to a hook-shape
which is embedded in the plastic lid portion 20 along the joint portion 24 of the
lid 4. The hook-like shape of the locking portion 49 may have any suitable radius,
for instance between 0.3-5 mm. Moreover, the locking portion 49 of the metal lid portion
22 may have any suitable shape assuring a tight fit between the plastic lid portion
20 and the metal lid portion 22 at the joint portion 24. For instance the locking
portion 49 of the metal lid portion 22 may be L-shaped or V-shaped. It is also possible
that the locking portion 49 of the metal lid portion 22 is not smooth along the periphery
48. For instance, some portions of the locking portion 49 may project further into
the plastic lid portion 20 than other portions of the locking portion 49 giving the
locking portion 49 of the metal lid portion 22 an appearance of a toothed gear wheel.
[0042] The lid 4 may have more than one circumferential elevation 26 to increase the stability
of the lid. The lid may have other arrangements to better withstand the forces from
the punching type colorant dispenser.
1. A paint container (1) comprising a receptacle (2) and a lid (4), wherein the lid (4)
comprises a metal lid portion (22) and a plastic lid portion (20), the metal lid portion
(22) being a central portion allowing the paint container (1) to be used in a punching
type colorant dispenser punching the metal lid portion (22) prior to dispensing colorant
into the paint, the plastic lid portion (20) being a peripheral portion encircling
the metal lid portion (22), c h a r a c t e r i z e d in that t the plastic lid portion
(20) comprises a lid sealing portion (46) sealing the lid (4) to a circumferential
receptacle sealing portion (30) of the receptacle (2).
2. Paint container (1) according to claim 1, wherein the plastic lid portion (20) comprises
a holding portion (40) to hold the lid (4) onto the receptacle (2).
3. Paint container (1) according to anyone of the preceding claims, wherein the plastic
lid portion (20) is made in one piece with the lid sealing portion (46).
4. Paint container (1) according to anyone of the preceding claims, wherein the receptacle
sealing portion (30) comprises a plastic receptacle sealing portion (30).
5. Paint container (1) according to anyone of the preceding claims, wherein the receptacle
(2) is a plastic receptacle (2).
6. Paint container (1) according to anyone of the preceding claims, wherein the lid (4)
comprises a joint portion (24) along which a peripheral portion (48) of the metal
lid portion (22) is joined to a fixing portion (50) of the plastic lid portion (20).
7. Paint container (1) according to claim 6, wherein the peripheral portion (48) of the
metal lid portion (22) is embedded in the fixing portion (50) of the plastic lid portion
(20) along said joint portion (24).
8. Paint container (1) according to claim 6 or 7, wherein the lid sealing portion (46)
encircles the joint portion (24).
9. Paint container (1) according to anyone of claims 6-8, wherein the joint portion (24)
comprises between 1 mm and 50 mm of the periphery of the metal lid portion (22), more
preferably between 2 mm and 30 mm of the periphery of the metal lid portion (22),
most preferably between 4 mm and 15 mm of the periphery of the metal lid portion (22).
10. Paint container (1) according to anyone of claims 6-9, wherein said peripheral portion
(48) of the metal lid portion (22) comprises a bent portion (48) having at least one
a bend (52, 54).
11. Paint container (1) according to claim 10, wherein said bent portion (48) comprises
at least two bends (52, 54).
12. Colour refraction method comprising
- arranging a paint container (1) in a punching type colorant dispenser, wherein the
paint container (1) is sealed by a circumferential receptacle sealing portion (30)
of a receptacle (2) in cooperation with a circumferential lid sealing portion (46)
of a plastic lid portion (20) of a lid (4);
- punching an opening in a metal lid portion (22) of the lid (4), the metal lid portion
(22) being a central portion of the lid (4) and being encircled by the plastic lid
portion (20); and
- dispensing colorant into the paint.
13. Colour refraction method according to claim 12, wherein the receptacle (2) is a plastic
receptacle (2).