Container with a Stirrer Device for Fluid Products

Abstract

A Container is disclosed with a stirrer device suitable to be installed on machines for dispensing fluid products. The container comprises a tank with a particular configuration defined by two cylinders each having a respective longitudinal axis, wherein the distance between two of the longitudinal axes is less than the diameter of a cylinder, and in which two stirrer units are comprised, coaxial to the cylinders of the tank. The stirrer units have elements that have a radial dimension a little less than the radius of the cylinders and are disposed along the substantial entirety of the longitudinal extension of shafts rotating axially, said shafts not having around them a zone not spatially affected by a stirrer element attached to said corresponding shaft.

Claims

1. A container with a stirrer device suitable to be installed, together with other containers of the same type, on machines for dispensing fluid products, such as colorants or the like, wherein said container comprises a tank configured so as to be shaped like the figure “8” made by the co-penetration of two cylinders with respective longitudinal axes and in which two stirrer units are comprised, each coaxial to a respective one of said cylinders of said tank, each comprising stirrer elements with the radial dimension a little less than a radius of said cylinders.

2. The container as in claim 1, wherein said stirrer elements are attached to shafts rotating axially, and are disposed substantially on the whole longitudinal length of said shafts, said shafts not having around them a zone not spatially affected by said stirrer element attached to said corresponding shaft.

3. The container as in claim 1, wherein said tank, configured as an “8” shape, has an area of overlapping caused by the co-penetration of the two cylinders, such that a distance between the two axes is less than a diameter of the two cylinders.

4. The container as in claim 3, wherein said stirrer elements cover said overlapping area so as to be involved in the process of stirring the fluid product.

5. The container as in claim 1, wherein said stirrer elements comprise one or more through holes on their surface even of different size, said through holes being disposed along an imaginary vertical axis of said stirrer element translated with respect to the central vertical axis of said stirrer element toward the outside, and wherein said stirrer elements are disposed at different angles of 180°, or 90°, or other possible angles.

6. The container as in claim 1, wherein said stirrer units are installed so as to have, with respect to each other, a radial displacement that can be equal to 90°, or 45° or 30°, or other angles suitable to the number of stirrer elements comprised in each stirrer unit.

7. The container as in claim 1, wherein said stirrer units are connected to idle toothed wheels coupled to a third toothed wheel that imparts the rotation motion to the stirrer units by means of a motor, keeping the angle of displacement constant between said stirrer units.

8. The container as in claim 1, wherein each stirrer unit is associated to a motor, suitably synchronized with respect to the other so as to maintain the initial displacement between said stirrer units.

9. The container as in claim 5, wherein said stirrer elements are made of a resistant plastic material, or steel or stainless steel, or an aluminum alloy.

10. The container as in claim 5, wherein said stirrer elements have a rectangular configuration, or other suitable quadrangular shape, a continuous surface, or have through holes disposed on the surface in a different way, or are flat or inclined.

11. The container as in claim 1, wherein the stirrer elements located more adjacent to a bottom of said tank, and comprised in each of the two stirrer units, have an inclined and cutting shape so as to scrape the bottom of the tank in order to remove possible sedimentations of paint.

12. A machine for dispensing fluid products such as colorants or the like, comprising an internal chamber to contain a plurality of tanks as in claim 1.

Description

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

[0035] These and other characteristics of the present invention will become apparent from the following description of some forms of embodiment, given as a non-restrictive example with reference to the attached drawings wherein:

[0036] FIG. 1 is a plan view of the container with stirrer device in a particular embodiment;

[0037] FIG. 2 is a section view of the container with stirrer device in a particular embodiment;

[0038] FIG. 3 is a perspective view of the container with stirrer device;

[0039] FIG. 4 shows a possible lay-out of a dispensing machine for colorants with a plurality of state-of-the-art containers;

[0040] FIG. 5 shows a possible lay-out of a dispensing machine for colorants with a plurality of containers according to the present invention;

DETAILED DESCRIPTION OF THE INVENTION

[0041] To facilitate comprehension, the same reference numbers have been used, where possible, to identify identical common elements in the drawings. It is understood that elements and characteristics of one form of embodiment can conveniently be incorporated into other forms of embodiment without further clarifications.

[0042] We shall now refer in detail to the various forms of embodiment of the present invention, of which one or more examples are shown in the attached drawings. Each example is supplied by way of illustration of the invention and shall not be understood as a limitation thereof. For example, the characteristics shown or described insomuch as they are part of one form of embodiment can be adopted on, or in association with, other forms of embodiment to produce another form of embodiment. It is understood that the present invention shall include all such modifications and variants.

[0043] According to the embodiments in FIGS. 1, 2 and 3, the invention concerns a container with a stirrer device for fluid products 10, hereafter referred to simply as container, which comprises a tank 11.

[0044] Hereafter in the description, merely by way of non-restrictive example, the fluid product is indicated as a paint, but it can be any other colorant liquid, such as for example a base for paints, an enamel, an ink or suchlike.

[0045] In a particular embodiment, the tank 11 can be configured by joining together two cylinders 23, in this case having the same diameter D.sub.1 and the same height and which share a zone, called overlapping zone 12 (see FIGS. 1 and 2). The overlapping zone 12 is caused by the co-penetration of the two cylinders 23. This configuration of the tank 11 will be defined hereafter as an “8”-shaped configuration.

[0046] According to one embodiment of the present invention, a multitude of tanks 11 of the same type can be installed inside an internal compartment that defines an available surface 25 of a machine for dispensing fluid products, such as for example colorants or suchlike.

[0047] Since they have an overlapping zone 12 and do not have any intermediate segment 112, like containers 110 in the state of the art, the tanks 11 according to the present invention can be installed, given the same available surface 25 in a dispensing machine for fluid products, in a greater number than known containers 110 (see the comparison between FIG. 4, which shows the solution of EP'1744826 and FIG. 5 which shows the solution according to the present invention).

[0048] This allows to further increase, compared with the solution of EP'1744826 (which is already an improvement), the compacting of the containers, thus allowing to obtain, given the same overall bulk of the dispensing machine, a greater number of fluid product containers, that is, with the same number of containers, a lower overall bulk of the dispensing machine.

[0049] The tank 11, in this particular embodiment, comprises two longitudinal axes X.sub.1 and X.sub.2, each defining the axis of the corresponding cylinder 23, having a distance L between them, less than D.sub.1. In substantial correspondence with the longitudinal axes X.sub.1 and X.sub.2, respective stirrer units 113 can be installed, each provided with an axially rotating shaft 15 coaxial with the respective cylinder 23.

[0050] The container 10 therefore comprises two stirrer units 13, one for each cylinder 23, able to carry out the mechanical action of homogenizing and mixing the paint, to prevent it from hardening and drying.

[0051] In the solution shown here, each stirrer unit 13 comprises two stirrer elements 14 attached radially on each shaft 15.

[0052] The stirrer elements 14, which can also have a different number and disposition than that shown here, can be made of resistant plastic material, or steel, or stainless steel or aluminum alloy.

[0053] Furthermore, the stirrer elements 14 can be made in a plurality of forms, such as rectangular blades or any other quadrangular shape. They can be flat or inclined, their surface can be continuous or holed, or have surface ridges or incisions to facilitate the homogenization of the paint.

[0054] In one embodiment, during the rotation of the shafts 15, the stirrer elements 14 are configured so that their contact surface with the fluid contained in the tank 11 is substantially perpendicular to the direction of rotation.

[0055] Moreover, according to this embodiment, the stirrer elements 14 are conformed so that the fluid is moved substantially along at least the level reached by the fluid in the tank 11.

[0056] In particular, in this embodiment, the stirrer elements 14 are disposed substantially over the whole longitudinal extension of the shafts 15, so that each shaft 15 does not have, along the longitudinal direction, one or more surface portions that are not affected spatially by a stirrer element 14 attached to the corresponding shaft 15.

[0057] In other words, there is no zone around each shaft 15 that is not spatially affected by a corresponding stirrer element 14 attached to the shaft 15, and that therefore is not stirred.

[0058] In this way, there is at least one stirrer element 14 stirring each of the spatial portions that make up the volume occupied by the fluid in the container 11, including the area near the bottom of the tank 11.

[0059] In a particular embodiment shown in FIG. 2, the stirrer elements 14 can have one or more through holes 16 to make them lighter, with a different diameter, bigger or smaller than each other.

[0060] The through holes 16 are disposed along an imaginary vertical axis of the stirrer elements 14, translated with respect to the central vertical axis (Y1) of the stirrer element 14 toward the outside.

[0061] This strategy not only makes the stirrer element 14 lighter, but also reduces its inertia moment, because portions farthest from the axis of rotation of the shaft 15 are removed and these, as is known, contribute most to the inertia moment associated with a rotating body.

[0062] This causes a reduction in the mechanical resistance and therefore there is a reduction in the mechanical energy needed to make the shafts 15 with which the stirrer elements 14 are associated rotate.

[0063] Furthermore, the presence of the holes on the surface of the stirrer elements 14 increases the circulation of the fluid in the tank 11 and hence the mixing of the fluid. In fact, during the rotation of the stirrer elements 14, if they are solid and perpendicular to the direction of rotation, the fluid near the surface of the stirrer element 14 comes to have a speed substantially the same as the stirrer element 14 itself.

[0064] Consequently, the fluid near the surface of the stirrer element 14 does not mix with the remaining fluid, until a solid layer is created on the surface of the stirrer element 14.

[0065] In a particular embodiment, the stirrer elements 14 can be attached on the axis of rotation of the shaft 15 in correspondence with their long side, or their short side, and the free side can be either perpendicular or inclined (for example inclination of 30°) with respect to the axis of the shaft 15.

[0066] In another embodiment, the stirrer elements 14 adjacent to the bottom of the tank 11 can have an inclined and pointed shape so as to scrape the bottom of the tank 11 in order to remove possible sedimentations of paint.

[0067] In another embodiment, at least two stirrer elements 14 can be attached on the shaft 15 in a position staggered with respect to each other by 180°, or more than two stirrer elements 14 can be attached, staggered with respect to each other by 90°, or with other possible angles.

[0068] The radial dimension of the stirrer elements 14 with respect to the respective longitudinal axis X.sub.1 or X.sub.2 is such as to be slightly less than the radius of the cylinders 23 (D.sub.1/2), taking into consideration the bulk given by the shaft 15 and finding the correct compromise to prevent friction with the internal wall of the tank 11 and at the same time to maximize the cover of the overlapping zone 12 during the rotation of the stirrer elements 14.

[0069] One configuration of the stirrer elements 14 obtained according to the above embodiment requires an accurate stagger of the stirrer elements 14 comprised in the two different stirrer units 13, so as to allow an adequate homogenization of the whole internal volume of the tank 11, and to prevent the stirrer elements 14 from knocking against and interfering with each other. Therefore, between the two different stirrer units 13 there must be a stagger sufficient to prevent interference of the stirrer elements 14, for example the stagger can be 90°, or 45° or 30° or any other stagger. The stagger must be adequate for the number of stirrer elements 14 installed in each stirrer unit 13, sufficient to prevent this disadvantage and to guarantee an adequate homogenization of the paint.

[0070] Each stirrer unit 13, in the non-restrictive embodiment shown here, is connected to an idle toothed wheel 17 by coupling the lower end of the shaft 15.

[0071] A third toothed wheel 18 is provided, able to impart motion to the stirrer units 13 by coupling with the two idle toothed wheels 17.

[0072] The third toothed wheel 18 is connected by means of a rotation shaft 20 to a timed motor 19.

[0073] The motor 19 is located on a specific support 21, positioned in the lower part of the tank 11 together with the idle toothed wheels 17 and the third toothed wheel 18.

[0074] The motor 19 imparts motion to the third toothed wheel 18 which in turn transmits the motion to the two idle toothed wheels 17 and hence to the corresponding stirrer units 13 to homogenize the paint inside the tank 11.

[0075] A movement system made in this way allows to be certain that the idle toothed wheels 17, suitably engaged, ensure that the angle of stagger between the two stirrer units 13 remains constant, preventing any interference between the stirrer elements 14.

[0076] A movement system conceived differently, and not providing an independent, non-synchronized movement of the stirrer units 13, would not guarantee a constant stagger due to the different densities of the paint, or other friction forces exerted on the stirrer unit 13.

[0077] One or more suction elements 22 are comprised on the lower part of the tank 11, and can be connected by suitable pipes to pumping delivery means (not shown in the drawings).

[0078] One or more connection elements 24 are comprised on the upper part of the tank 11, to recirculate the fluid, and are connected by suitable pipes to metering elements (not shown in the drawings).

[0079] The embodiments described above allow to optimize the homogenization of the paint, allowing to prevent dead zones, i.e. zones not affected by the stirring, thanks to the joint solution of the particular configuration of the tank 11 and the configuration of the stirrer elements 14 belonging to the stirrer units 13.

[0080] Furthermore, the disposition of the two stirrer units 13 allows to obtain a homogenization at two different times by both stirrer elements 14, thus ensuring the complete mixing of the fluid contained inside the tank 11.

[0081] It is clear that modifications and/or additions of parts may be made to the stirrer device for fluid products as described heretofore, without departing from the field and scope of the present invention.

[0082] It is also clear that, although the present invention has been described with reference to some specific examples, a person of skill in the art shall certainly be able to achieve many other equivalent forms of stirrer device for fluid products, having the characteristics as set forth in the claims and hence all coming within the field of protection defined thereby.