Patent Publication Number: US-2021186255-A1

Title: A drip tray cover and a drip tray for use in a drinks machine

Description:
FIELD OF THE INVENTION 
     This invention relates to drip trays for drinks machines. 
     BACKGROUND OF THE INVENTION 
     Drinks machines generally have a drinks dispensing outlet beneath which a cup or mug is placed to collect the dispensed drink. 
     The cup or mug is typically positioned on a support, beneath which a drip tray is mounted to collect spillage. The drip tray has a cover on which the cup or mug is placed, which functions as the support. 
     The trip tray and its cover are typically removable from the machine for emptying and cleaning. Alternatively, only the cover may be removable and the drip tray may then be cleaned without removal. 
     The drip tray needs to be emptied and cleaned before it is full. Thus, there is a need to be able to check the amount of spillage collected in the drip tray. In a most basic drinks machine, this may simply involve periodically removing the drip tray cover to check. This has the risk that the user does not check sufficiently frequently, so that the overfilling occurs or else the drip tray is so full that handling for cleaning becomes difficult. 
     Other drinks machines incorporate a floater within the drip tray, which visibly shows when the liquid reaches a set level. This requires an extra part placed in the (dirty) drip tray which makes it difficult to clean and fragile, and the user can misplace the floater during cleaning. 
     The floater does not allow the user to see the actual liquid level and it may not be simple to ascertain the liquid level because the user may have to judge the float height. 
     It has been proposed to provide a larger area of the drip tray cover though which the liquid can be seen so that a better visual inspection of the liquid level is possible. This is for example disclosed in JPH06-113955 in which a tube extends down to the drip tray base, and the liquid level up the tube can be inspected. However, a large tube is required so that capillary effects do not come into play, and this detracts from aesthetic appearance of the drip tray. 
     SUMMARY OF THE INVENTION 
     The invention is defined by the claims. 
     According to examples in accordance with an aspect of the invention, there is provided a drip tray cover for a beverage machine, comprising: 
     a set of openings for allowing liquid to pass to a drip tray base beneath the drip tray cover; and 
     a projection having an open shape for facing a downward direction in use having a tip which is adapted to reach below a maximum liquid level of the drip tray base beneath and thereby function as a dipstick, 
     wherein at least one opening is positioned to enable a line of sight to the projection from a user location of the beverage machine. 
     This cover has an integrated projection that functions as a dipstick, which is visible through one of the openings in the cover. In this way, a user can easily see when the liquid level reaches a maximum, by seeing the actual liquid against the projection. This design directly shows the waste water level without the need for additional parts, and is thus easy to clean and maintain. 
     The projection has an open shape which means it is not intended to surround a liquid portion but instead forms a tab which projects into the liquid. The projection may be a generally flat tab or a curved but open wall. 
     The projection is preferably an integral part of the drip tray cover. Thus, the projection may be formed as part of a stamping process for a metal drip tray cover or a molding process for a plastics drip tray cover. 
     The projection for example extends downwardly from a location at a rear side of the at least one opening. In this way, the projection is visible through the opening when viewed from in front. Thus, the user is able to see the projection and read off the liquid level. 
     The projection for example comprises a marking which indicates the maximum liquid level. This maximum liquid level is below a top of the drip tray base, so that cleaning can be carried out without risk of spillage. 
     The marking may comprise an orifice or projection. This may provide an easy to see marker, which changes visibly in appearance when empty compared to when full of liquid. 
     The projection may have a surface area and shape corresponding to the at least one opening. This means the projection may be pressed out from the opening during a pressing stage. This is particularly suitable for a metal drip tray cover. 
     The drip tray cover may comprise a set of projections, each projection associated with a respective opening, wherein at least two of the projections and associated openings provide lines of sight from different user locations. 
     In this way, multiple dipsticks are provided, and they are designed to be visible from different viewing directions, so that for a range of possible user positions, at least one dipstick is clearly visible. 
     The invention also provides a drip tray comprising a drip tray base for collecting liquid and a drip tray cover as defined above. 
     The invention also provides a drinks machine comprising: 
     a drink dispenser having a dispensing outlet; and 
     a drip tray as defined above positioned below the dispensing outlet. 
     The drinks machine is for example a domestic drinks machine, which is thus typically not plumbed in either to a water supply or to a waste water outlet, and hence requires manual inspection and emptying of the drip tray. The drinks machine is for example a coffee machine. 
     These and other aspects of the invention will be apparent from and elucidated with reference to the embodiment(s) described hereinafter. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       For a better understanding of the invention, and to show more clearly how it may be carried into effect, reference will now be made, by way of example only, to the accompanying drawings, in which: 
         FIG. 1  shows an example of a drinks machine; 
         FIG. 2  shows a drip tray cover; 
         FIG. 3  shows an example of one projection in more detail; and 
         FIG. 4  shows a drip tray. 
     
    
    
     DETAILED DESCRIPTION OF THE EMBODIMENTS 
     It should be understood that the detailed description and specific examples, while indicating exemplary embodiments of the apparatus, systems and methods, are intended for purposes of illustration only and are not intended to limit the scope of the invention. These and other features, aspects, and advantages of the apparatus, systems and methods of the present invention will become better understood from the following description, appended claims, and accompanying drawings. It should be understood that the Figures are merely schematic and are not drawn to scale. It should also be understood that the same reference numerals are used throughout the Figures to indicate the same or similar parts. 
     The invention provides a drip tray cover for a beverage machine having a projection for facing a downward direction in use having a tip which is adapted to reach below a maximum liquid level of a drip tray base beneath. At least one opening makes the projection visible to a user and it functions as dipstick for inspecting the liquid level in the drip tray. 
     The invention may be applied to any drinks machine which has a drink dispensing nozzle provided over a drip tray. The drip tray serves to collect spillage from the nozzle, but in many machines it also serves to collect water that is discharged from the internal hydraulics of the machine, e.g. water that is too hot (after steam generation for frothing milk the heater needs some time to cool down), or too cold, or rest water from the brew chamber. 
     By way of example only,  FIG. 1  shows a drinks machine  10  in the form of a full function espresso coffee machine, in perspective view. This example is a bean-to-cup machine, although other options are possible as mentioned further below. 
     It comprises a main body  12  which houses a water reservoir, a water heater and a reservoir for receiving coffee beans. There is an internal grinding mechanism for creating coffee grind, a brewing chamber or brew group for receiving the coffee grind, and a pumping system for pumping heated water through the coffee grind. 
     An espresso coffee is typically made by forcing pressurized water to flow through a quantity of coffee grind. The brewing chamber is for example removably arranged in order to facilitate emptying and cleaning of the brewing chamber. 
     During an espresso making process, the coffee grind is compressed to a certain extent. To this end, the machine for example comprises a piston, which is movably arranged in a cylindrical brewing chamber, and which is capable of sealing an open top side of the brewing chamber. 
     Movement of the piston controls the extent of compression of the coffee grind. When the coffee grind is compressed more and more, a flow through resistance of the coffee grind increases. During an espresso making process, a brewing pressure at which the process is performed, i.e. a pressure at which the water is conducted through the coffee grind, is determined by the flow through resistance of the coffee grind. 
     The machine comprises a coffee output tube  14 , which is the main dispensing outlet, from which the espresso drink (without milk) is output. The coffee output tube  14  faces downwardly and is located over a drip tray  16 . The drip tray  16  is removable from the main body for emptying and cleaning. It comprises a base part  17  for collecting liquid and a drip tray cover  18 . The drip tray cover functions as a support plate for receiving a cup into which the coffee is dispensed. It comprises a set of openings to allow spilled liquid to pass to the base part  17  where it is collected. 
       FIG. 1  also shows a user interface  19  for receiving user selections, such as for water selection and for other drinks selections. Some of the drinks selections may relate to drinks recipes which include frothed milk and therefore require the generation of steam. An output nozzle  20  is provided for delivering steam or hot water. This is an additional dispensing outlet. This depends on user selection at the user interface  19 . The steam output is used for generating frothed milk, and the option of a hot water only output gives additional options to the user, for example for making soup, tea, hot chocolate etc. 
     This full function espresso machine is only one example of the type of drinks machine to which the invention may be applied. Drip trays  16  are used in all manner of drinks machines, for example other coffee machines which receive already-ground coffee or coffee pods, capsules, cartridges or the like consumables, as well tea making machines and other drinks machines. 
       FIG. 2  shows an example of a drip tray cover  18  in accordance with the invention. 
     The cover is in the form of a plate which acts as a support for a cup or mug, having a set of openings  30 ,  32  for allowing liquid to pass to a drip tray base  17  ( FIG. 1 ) beneath the drip tray cover. 
     The openings may for example be larger where the spillage is likely to be greatest i.e. beneath the coffee output tube  14 . The openings are designed both for their function and to give a desired aesthetic appearance. 
     At least one opening  32  is provided with a projection  34  for facing a downward direction in use, to function as a dipstick to enable visual inspection of a liquid level in the drip tray base. 
     The opening  32  is positioned relative to the projection  34  to enable a line of sight to the projection from a typical user location, i.e. in front of the beverage machine and at a higher position than the drip tray. 
     The projection is thus visible through the opening  32  so that the user can easily see when the liquid level reaches a maximum, by seeing the actual liquid against the projection. 
     The drip tray cover may be a single component, for example of molded plastic or pressed metal. The projection is thus an integral part of the drip tray cover. The projection may comprise a folded down cut-out portion of the drip tray cover which then forms the opening  32 . In this way, the drip tray cover may be formed from a sheet, giving a low cost and simple manufacturing process. 
     For example, the opening  32  may comprise a square, rectangle or parallelogram shape, and the projection  34  is then a planar tab which comprises a folded down region corresponding in size and shape to the opening, folded down from a corner or an edge. 
     The projection may be curved instead of planar. However it is an open shape which means the line of contact between the projection and the liquid is an open line (straight or curved). Thus no capillary tube effects are generated, and an accurate liquid level reading may be taken, in a similar manner to a planar dipstick. 
     As shown in  FIG. 2 , the projection extends downwardly from a location at a rear side of the opening  32 . In this way, the projection is visible through the opening when viewed from in front. Thus, the user is able to see the projection and read off the liquid level. 
       FIG. 3  shows one example of the projection  34  in more detail. It comprises a tip  36  which is adapted to reach below a maximum liquid level of the drip tray base beneath. 
     The tip for example has a level marker  38  which represents the maximum liquid level. This level marker may be a line, a projection or an orifice. The aim is to provide a visual reference, such that the presence or absence of liquid at that level can be easily identified. 
     The projection also includes a written indicator “MAX” which makes clear that the marker  38  corresponds to the maximum liquid level. 
       FIG. 4  shows a portion of the overall drip tray  16 , comprising the base  17 , drip tray cover  18  and the projection  34  which extends below the maximum recommended liquid level  40 . This corresponds to a liquid depth  42 , but there is a safety margin  44  by which the maximum recommended liquid level is below the top of the drip tray base  17 . 
     The drip tray cover  18  is generally flat (apart from the projections and an outer rim), with a top side and an underside. The projection  34  for example projects a distance below the underside in a range 5 mm to 40 mm, for example 5 mm to 25 mm. 
       FIG. 4  shows the line of sight  46  to the projection, and in particular the tip  36 , from a location corresponding to the typical position of a user&#39;s eyes when operating the drinks machine. 
     The projection is shown to extend downwardly, but not vertically (i.e. not perpendicular to the general plane of the cover). Instead, there is an angle θ to the general plane of the cover. The angle may be between 45 degrees and 90 degrees (inclusive), so the projection may extend fully downwardly. A shallower angle may improve readability but may also require a larger opening for the tip to be visible. The angle may be between 50 and 85 degrees, for example between 60 and 80 degrees. 
     In the example above, only one projection is shown. However, there may be a set of projections, each projection associated with a respective opening. One projection may be more easily visible to the user than the other or others. Indeed, this may be a deliberate part of the design, by arranging that two or more different projections and their associated openings provide lines of sight from different user locations. In this way, multiple dipsticks are provided, and they are designed to be visible from different viewing directions, so that for a range of possible user positions (e.g. as a result of different user heights), at least one dipstick is clearly visible. 
     Variations to the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed invention, from a study of the drawings, the disclosure and the appended claims. In the claims, the word “comprising” does not exclude other elements or steps, and the indefinite article “a” or “an” does not exclude a plurality. A single processor or other unit may fulfil the functions of several items recited in the claims. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage. A computer program may be stored/distributed on a suitable medium, such as an optical storage medium or a solid-state medium supplied together with or as part of other hardware, but may also be distributed in other forms, such as via the Internet or other wired or wireless telecommunication systems. Any reference signs in the claims should not be construed as limiting the scope.