Paint cup lid with screen assembly

Abstract

The invention relates to a paint cup lid and to a paint cup system having such a lid (60), which has an improved and more flexible usability, in particular with respect to the primary filtering of the paint by means of provided screens (70, 80).

Description

[0001] Paint cup lid with sieve arrangement

[0002] The invention relates to a paint cup lid and a paint cup system with a paint cup lid with improved material provision, in particular an improved possibility of sieving provided material.

[0003] Paint spray guns are used to atomize flowable material and apply it to a surface. The material to be applied can be either liquid or powder. The material to be applied can be fed to the paint gun via a reservoir, which is often designed in the form of a cup.

[0004] The material provided in the cup for application to a surface to be painted may contain contaminants that negatively impact the painting process. If the contaminants are foreign particles or clumps of the material being applied, these can be filtered out or removed using sieves. For this purpose, sieves have been provided in the past in a paint cup lid or in paint cup systems. However, these are generally inflexible and have a fixed mesh size, which makes them unsuitable for many applications.

[0005] Therefore, there is a need to provide a paint cup lid and a paint cup system with a paint cup lid with improved material provision, in particular an improved possibility of sieving provided material.

[0006] According to the invention, a paint cup lid and a paint cup system with a paint cup lid are provided according to the independent claims, further developments thereof being embodied in the dependent claims.

[0007] According to one embodiment, a paint cup lid is provided for use with a paint cup pot and for coupling to a paint spray gun, wherein the paint cup lid comprises: a lid body with a first connection flange on the paint cup pot side and a second connection flange on the paint spray gun side, a mesh fastening area for a mesh to be coupled, an insert mesh receptacle for an insert mesh to be coupled, wherein the lid body defines an interior space through which a paint can flow, which extends between the first connection flange and the second connection flange, and the second connection flange is located downstream of the first connection flange, wherein the mesh fastening area for a mesh to be coupled is arranged in the interior space of the lid body between the first connection flange and the second connection flange circumferentially around the interior space of the lid body,wherein the insert sieve receptacle for the insert sieve to be coupled is arranged between the sieve net fastening area for a sieve net to be coupled and the second connecting flange in the interior space, wherein the insert sieve receptacle for the insert sieve to be coupled has an insert sieve contact surface surrounding the interior space of the lid body for the insert sieve to be coupled and a plurality of locking projections arranged along the circumferential insert sieve contact surface, wherein the plurality of locking projections are designed to couple the insert sieve to be coupled circumferentially to the insert sieve contact surface, wherein the sieve net fastening area has a sieve net contact surface with an axially projecting circumferential coupling rib.

[0008] The second connection flange on the side of the spray gun is to be understood in particular as a substantially tubular region which can be designed in the form of a nozzle.

[0009] This tubular connection flange is preferably inserted into a corresponding, essentially tubular receptacle of the paint spray gun and firmly connected to the paint spray gun via a corresponding connection geometry.

[0010] A sieve net to be coupled is a flat structure that is able to retain particles of a certain size and allow particles and fluids below a certain size to pass through. The particle size boundaries are not sharply defined, but rather can be seen as a particle size distribution. Since particles often do not have a spherically symmetrical shape, it is possible for a particle to penetrate a sieve net in one orientation, but to be retained by the sieve net in another orientation. A sieve net can in particular comprise a sieve fabric, e.g. made from a thread or fiber weave, a sieve fleece, a perforated sieve surface, e.g. a membrane, foil, film or plate provided with a hole pattern, or a flat woven sieve structure.

[0011] A screen mesh contact surface can be understood as a structure against which the screen mesh can rest in the interior of the paint cup lid, thereby securing the screen mesh. The screen mesh contact surface can be, for example, a screen mesh contact shoulder, such as a circumferential step, a circumferential ledge, or a circumferential edge arranged in the interior of the paint cup lid.

[0012] This allows for a paint cup lid to be provided that allows for the installation of a sieve mesh inside the paint cup lid and simultaneously allows for the insertion of an insert sieve, which can also be replaced if necessary. This allows the paint cup lid to be highly adaptable to the material being processed.

[0013] According to one embodiment, the paint cup lid further comprises: a sieve net, wherein the sieve net is fixed to the circumferential coupling rib in a material-locking manner in the sieve net fastening area.

[0014] In this way, the screen mesh can be permanently secured in the paint cup lid. The material-locking attachment can be achieved by a welding process, in particular ultrasonic welding, gluing, or another material-locking or material-bonding process. The screen mesh can be cut out of a continuous material and connected to the coupling rib. The screen mesh can already be cut out in the appropriate shape before it is material-locked, or the connection process can create a break line along which any protruding screen mesh areas can be removed. Furthermore, the material, in particular the pore size or mesh width of the screen mesh, can be modified if necessary before the screen mesh is material-locked to the surrounding rib.

[0015] According to one embodiment, a paint cup lid is provided for use with a paint cup pot and for coupling to a paint spray gun, wherein the paint cup lid comprises: a lid body with a first connection flange on the paint cup pot side and a second connection flange on the paint spray gun side, a sieve mesh, an insert sieve receptacle for an insert sieve to be coupled, wherein the lid body defines an interior space through which a paint can flow, which extends between the first connection flange and the second connection flange, and the second connection flange is located downstream of the first connection flange, wherein the sieve mesh is fixed in the interior space of the lid body between the first connection flange and the second connection flange circumferentially around the interior of the lid body in a sieve mesh fastening area,wherein the insert sieve receptacle for the insert sieve to be coupled is arranged in the interior space between the sieve net and the second connecting flange, wherein the insert sieve receptacle for the insert sieve to be coupled has an insert sieve contact surface surrounding the interior space of the lid body for the insert sieve to be coupled and a plurality of locking projections arranged along the circumferential insert sieve contact surface, wherein the plurality of locking projections are designed to couple the insert sieve to be coupled circumferentially to the insert sieve contact surface.

[0016] In this way, the sieve mesh can already be firmly formed and, at the same time, an alternative fastening geometry for an additional sieve, the insert sieve, can be provided. According to one embodiment, the sieve mesh has a sieve region and a fastening region surrounding the sieve region, wherein the fastening region is fixed in the sieve mesh fastening region in a material-locking manner circumferentially around the interior of the lid body.

[0017] In this way, the fastening area can be designed to meet the requirements of material-to-material fastening. For this purpose, the fastening area can have a different thickness, pore or mesh size, and / or material composition than the screen area, or be pretreated differently.

[0018] According to one embodiment, the fastening region of the sieve net is fixed in a material-locking manner around the interior of the cover body by means of a welding process, in particular an ultrasonic welding process, in the sieve net fastening region.

[0019] In this way, the fixation can be achieved without adding any additional material. In particular, the material of the screen mesh, the material of the surrounding rib, or both materials can be melted onto or onto the mesh to create a material-tight connection between the screen mesh and the surrounding rib.

[0020] According to one embodiment, at least part of the sieve area of ​​the sieve net can be separated from the paint cup lid.

[0021] In this way, the sieve net can be easily removed in the event that its pore or mesh size is insufficient, in order to then be able to insert an insert sieve adapted to the required pore or mesh size into the interior of the paint cup lid, which can be placed in particular on the insert sieve support.

[0022] According to one embodiment, the sieve net has a predetermined tear line in the sieve area, along which at least a part of the sieve area can be separated from the sieve net.

[0023] In this way, the dividing line can be clearly defined so that areas of the sieve mesh that are too large or too small are not accidentally removed.

[0024] According to one embodiment, each of the plurality of locking projections extends radially inward into the interior of the lid body. This enables reliable securing of an insert sieve. The plurality of locking projections can be evenly distributed along a circumference, in particular a circular circumference, so that an insert sieve, provided it has corresponding structures for receiving the locking projections, can be inserted in different angular positions. The number of locking projections can be between 3 and 6, which enables reliable securing along the circumference. The number of locking projections can in particular be 5, which enables reliable securing along the circumference, in particular when a locking projection does not engage behind the insert sieve.

[0025] According to one embodiment, each of the plurality of locking projections has a locking geometry directed radially inward into the interior of the lid body, which is designed to engage behind a fastening region of an insert sieve to be coupled, and further has a paint flow guide surface extending radially outward.

[0026] In this way, the locking projections can also engage behind an edge of an insert screen that does not have a special design or structures for the locking projections to engage. Furthermore, the locking projections can also be used as a paint guide surface to fluidically direct the inflow from a paint reservoir to the insert screen and to prevent or dampen any turbulence.

[0027] According to one embodiment, the interior of the lid body has a funnel-shaped interior region between the first connecting flange and the second connecting flange, wherein the insert sieve contact surface comprises an upstream opening of the funnel-shaped interior region and a downstream opening of the funnel-shaped interior region transitions into the second connecting flange. In particular, a maximum outer dimension of the first connecting flange can be larger than a maximum outer dimension of the second connecting flange. In particular, the first connecting flange can have a larger diameter than the second connecting flange.

[0028] In this way, a paint cup lid interior can be provided with little or no dead space and minimal turbulence barriers. This allows the paint flow to be kept essentially laminar and deposits to be avoided. This also prevents deposited paint residues that could potentially age, set, or otherwise chemically change.

[0029] According to one embodiment, the funnel-shaped interior region is frustoconical.

[0030] This allows for a uniform flow distribution as the paint flows through the interior of the paint cup lid. The paint velocity thus increases continuously toward the outlet on the second connection flange.

[0031] According to one embodiment, the second connecting flange has an inner passage in which a locking shoulder is arranged, which is designed to receive corresponding locking arrangements of a further insert sieve to be inserted.

[0032] In this way, an additional sieve can be installed near the outlet for safety reasons, so that even in the event of a defect in the sieve net and / or the insert sieve, any particles passing through the damaged area can be reliably stopped so that they do not get into a connected paint spray gun and clog a paint nozzle or disrupt the paint finish.

[0033] According to one embodiment, the second connecting flange in the inner passage has a first tapered region upstream of the locking shoulder in the inner passage and preferably has a second tapered region downstream of the locking shoulder in the inner passage.

[0034] This allows for a continuous taper and places recesses or radial grooves in a flow shadow in the direction of flow. Particularly when providing a groove into which an additional insert screen can be snapped, this groove or a fastening area of ​​an additional insert screen can be placed behind the taper in the direction of flow.

[0035] According to one embodiment, the second connecting flange has, on the radially outwardly directed side opposite the interior of the cover body, a sealing lip arrangement for sealing the second connecting flange with respect to a paint spray gun.

[0036] In this way, a paint outlet between the second connection flange and a paint connection nozzle of a paint spray gun can be sealed. The sealing lip arrangement can be made of the same material as the paint cup lid or manufactured from a different material using a 2-component injection molding process. Elasticity of the sealing lip arrangement can be achieved either by selecting a suitably elastic material or by a low wall thickness of the sealing lips, which allows for deformation. The sealing lip arrangement can, in particular, have at least two axially spaced sealing lips. In particular, the axial spacing can be less than the radial extent of the sealing lips.

[0037] According to one embodiment, the first connecting flange has, on the radially outwardly directed side opposite the interior of the lid body, a fixing geometry for coupling a paint reservoir, preferably in the form of a lining and / or a paint cup pot surrounding the lining.

[0038] In this way, a reliable coupling of a paint cup pot and / or the lining to the paint cup lid can be achieved. The fixing geometry can further comprise a sealing arrangement, in particular a sealing surface, along which the paint cup lid can be sealingly coupled to the paint cup pot and / or the lining.

[0039] According to one embodiment, the second connecting flange has a coupling geometry for coupling to a paint spray gun on the radially outwardly directed side opposite the interior of the cover body.

[0040] This allows the paint cup lid to be reliably secured to the corresponding counter-coupling geometry on the spray gun. This also allows a reliable seal between the paint cup lid and the spray gun to be maintained.

[0041] According to one embodiment, the coupling geometry is designed as a clamping wedge element extending at least along a partial circumference of the second connecting flange with a clamping surface inclined in the circumferential direction of the second connecting flange and to a plane orthogonal to a mounting direction, wherein the clamping surface is designed to engage behind a clamping projection on a paint spray gun.

[0042] In this way, the coupling geometry can engage behind a clamping projection on the spray gun, and the paint cup lid can be secured to the spray gun similar to a bayonet coupling. The inclined clamping surface allows for a gradual increase in clamping force as the rotational movement progresses.

[0043] According to one embodiment, the clamping surface inclined in the circumferential direction of the second connecting flange and to a plane orthogonal to a mounting direction is further inclined radially from the second connecting flange outwards relative to the plane orthogonal to a mounting direction by an angle between 10° and 20°, in particular by an angle (62e) of 15° +1-2°.

[0044] In this way, a simpler introduction of the coupling geometry into a connection and a corresponding counter-coupling geometry in the spray gun can be enabled and, furthermore, a centering of the second connection flange in a connection of the spray gun can be achieved.

[0045] According to one embodiment, a paint cup system is provided, comprising: a paint cup lid as described above, and an insert sieve with a sieve region and a fastening region surrounding the sieve region, wherein the fastening region of the insert sieve has a locking counter geometry which is designed to cooperate with the radially inwardly directed locking geometry of the locking projections in such a way that the locking geometry of the locking projections engages behind the fastening region of the insert sieve.

[0046] In this way, a reliable coupling of the insert sieve to the paint cup lid can be achieved.

[0047] According to one embodiment, the insert sieve has an outer dimension which is designed such that it can penetrate a contour of a predetermined tear line provided in the sieve net.

[0048] In this way, the insert screen can be passed through the opening created in the screen mesh and then secured to the locking projections on a contact surface downstream of the screen mesh's securing area. The insert screen can then functionally replace the screen mesh, for example, with an adjusted desired screen pore size or mesh width.

[0049] According to one embodiment, the insert sieve and / or the sieve net has a hand grip geometry which is designed in such a way that it allows a tool-free removal of the insert sieve from the locking geometry of the locking projections and / or a tool-free separation of the sieve net from the sieve net fastening area.

[0050] This allows the insert sieve or sieve net to be removed from the interior of the paint cup lid without the use of tools. The gripping geometry can be designed as a recessed grip or curved grip, as a tab, or as an area on which pressure can be applied to lift an opposite area like a rocker.

[0051] The features described above, including those from different embodiments, can also be combined with each other, resulting in synergistic interactions that go beyond the sum of the individual effects.

[0052] The invention is explained below using exemplary embodiments, which are described with reference to the following figures:

[0053] Figure 1 shows a paint spray gun with a coupled paint cup according to an exemplary embodiment.

[0054] Figure 2 shows a sectional view of a paint cup lid with an insert sieve holder without an inserted insert sieve according to one embodiment.

[0055] Figure 3 shows a sectional view of a paint cup lid with an insert sieve holder with an insert sieve to be inserted according to an embodiment.

[0056] Figure 4 shows a sectional view of a paint cup lid with an insert sieve holder with an inserted insert sieve according to one embodiment.

[0057] Figure 5 shows a sectional view of a paint cup lid with a materially fixed sieve net and with an insert sieve holder without an inserted insert sieve according to one embodiment.

[0058] Figure 6 shows a sectional view of a paint cup lid with a materially fixed sieve net whose sieve area is cut out and with an insert sieve holder with an insert sieve to be inserted according to an embodiment.

[0059] Figure 7 shows a sectional view of a paint cup lid with a materially fixed sieve net whose sieve area is cut out and with an insert sieve holder with an inserted insert sieve according to an embodiment.

[0060] Figure 8 shows a sectional view of a paint cup lid area with an insert sieve holder without an inserted insert sieve according to one embodiment.

[0061] Figure 9 shows a sectional view of a paint cup lid area with an insert sieve holder with an inserted insert sieve according to one embodiment.

[0062] Figure 10 shows a sectional view of a paint cup lid section with a detailed view of an insert sieve holder without an inserted insert sieve according to one embodiment.

[0063] Figure 11 shows a sectional view of a paint cup lid portion with a detailed view of an insert sieve receptacle with an inserted insert sieve according to one embodiment.

[0064] Figure 12 shows an interior view of a paint cup lid according to one embodiment.

[0065] Figure 13 shows a partial sectional interior view of a paint cup lid according to one embodiment.

[0066] Figure 14 shows sectional views of a second connecting flange of the paint cup lid according to an embodiment.

[0067] Figure 15 shows sectional views of a second connecting flange of the paint cup lid with an inserted additional insert sieve according to one embodiment.

[0068] Figure 16 shows another insert sieve according to an embodiment.

[0069] Exemplary embodiments are described and explained below with reference to the figures listed above. Like reference symbols or analogous reference symbol structures refer to analogous or interacting components.

[0070] Figure 1 shows a paint spray gun 100 with a coupled paint cup 40 according to an exemplary embodiment. The paint spray gun 100 has a paint spray gun body 10, which has a connection 12 for a paint cup 40. The paint cup 40 shown in Figure 1 preferably provides the paint contained in the paint cup 40 to the paint spray gun 100 in a gravity-driven manner. This paint is supplied to the connection 12 in the direction of the paint flow direction S of the paint spray gun 100 via a second connection flange 62 of the paint cup lid 60. Upon actuation of an actuating lever 30, an air valve (not shown here) in the paint spray gun 100 is opened, and an air stream carries the supplied paint through a material nozzle or paint nozzle 90 toward a workpiece to be painted.

[0071] The paint cup 40 has a paint cup pot 50 and a paint cup lid 60. The paint to be applied is poured into the paint cup pot 50, and the paint cup pot 50 is closed with the paint cup lid 60 via a first connecting flange 61 of the paint cup lid 60. Additionally, a lining (not shown here) can be provided, which lines the paint cup pot in such a way that it does not come into contact with the material to be sprayed.

[0072] The paint may contain particles, clumps, or thickened paint that should not be fed into the paint gun 100, as these can clog the paint nozzle 90. For this purpose, sieve arrangements can be provided in the paint cup lid that can retain particles, clumps, or thickened paint. For this purpose, the paint cup lid 60 is provided with devices for receiving sieve arrangements, as described below.

[0073] Figure 2 shows a sectional view of a paint cup lid 60 with an insert sieve receptacle 68 without an inserted insert sieve according to one embodiment. Figure 3 shows a sectional view of a paint cup lid 60 with an insert sieve receptacle 68 with an insert sieve 80 to be inserted according to one embodiment, while Figure 4 shows a sectional view of a paint cup lid 60 with an insert sieve receptacle 68 with an inserted insert sieve 80 according to one embodiment.

[0074] The paint cup lid 60 has a paint cup lid body 65 that defines an interior space 66. The paint cup lid 60 further has a first connecting flange 61, which serves for coupling and sealing with the paint cup pot 50 and through which the paint is supplied to the paint cup lid 60 and the components located therein. The interior space region 66a can be funnel-shaped and has an upstream opening 66b on the first connecting flange 61 and a downstream opening 66c on the second connecting flange 62.

[0075] In the embodiment shown here, the paint cup lid 60 has, in its interior 66, a screen mesh fastening area 67 for a screen mesh 70 on the paint cup lid 60. The screen mesh 70 is not shown in Figures 2, 3, and 4, as it is not yet provided in these figures. The subsequent position of the screen mesh 70 can be seen in Figure 5. The screen mesh fastening area 67 here has a screen mesh contact surface 67a, in particular in the form of a screen mesh contact shoulder for a screen mesh 70 to be coupled. Furthermore, the screen mesh fastening area 67 has a circumferential coupling rib 67b in order to fix the screen mesh 70 to be coupled thereto in a material-locking manner.

[0076] Furthermore, the paint cup lid 60 has, in its interior space 66, an insert sieve receptacle 68 for a connectable insert sieve 80. The insert sieve receptacle 68 has, in particular, an insert sieve contact surface 68a for a connectable insert sieve 80, as well as a plurality of locking projections 69, which are distributed along a circumference, in particular are evenly distributed.

[0077] The first connecting flange 61 has a fixing geometry, in particular a locking geometry 61a for coupling to a paint reservoir or a paint cup pot 50 and / or a lining. Located in the downstream direction of the interior 66 of the paint cup lid 60 from the first connecting flange 61 is a second connecting flange 62 with an inner passage 62a to the interior 66. In the embodiment shown here, the inner passage 62a contains a locking shoulder 62b, as well as a first tapered region 62h and a second tapered region 62i. The second connecting flange 62 further has a coupling geometry 62c on its outer side for coupling the second flange 62 or the paint cup lid 60, and thus the paint cup 40, to the paint spray gun 100, which serves as a paint dispensing device. In the embodiment shown here, a clamping surface 62d is located on the coupling geometry 62c.The clamping surface 62d is inclined in the circumferential direction and serves to successively clamp the coupling geometry 62c to a paint spray gun 100, there at the connection 12 for the paint cup 40. The coupling geometry 62c can also have a radially outwardly directed inclination, which is designated here by the angle 62e, which defines the radially outwardly directed inclination of the clamping surface 62d. This inclination serves for centering and improved insertability into the connection 12 of the paint spray gun 100.

[0078] A sealing lip arrangement 62g may also be provided on the outside of the second connection flange 62 in order to seal the second connection flange 62 from the connection 12 of the paint spray gun 100.

[0079] Figure 2 shows the paint cup lid without any inserted or built-in sieve arrangements, i.e., without a sieve net and without an insert sieve. Figure 3 illustrates the installation of the insert sieve 80. In the embodiment shown here, the insert sieve 80 has a fastening area 81 and a sieve area 82. The fastening area 81 can be a circumferential frame, which can also have a locking counter geometry 81a, against which the locking projections 69 engage with their locking geometry 69a, as shown in Figures 10 and 11. The insert sieve 80 is brought into engagement with the insert sieve receptacle 68, in particular placed against the insert sieve contact surface 68a of the insert sieve receptacle 68 and secured there by the locking projections 69.The fixing is carried out in such a way that the fastening area 81 rests against the insert sieve contact surface 68a in such a way that the paint flows only through the sieve area 82, but not between the insert sieve contact surface 68a and the fastening area 81, as shown in Figure 4.

[0080] Figures 5, 6 and 7 show a view analogous to Figures 2, 3 and 4, but with a built-in, i.e. materially bonded, screen mesh 70. Figure 5 shows a sectional view of a paint cup lid 60 with a materially bonded screen mesh 70 and with an insert screen receptacle 68 without an inserted insert screen 80 according to one embodiment. Figure 6 shows a sectional view of a paint cup lid 60 with a materially bonded screen mesh 70, the screen region 72 of which, however, has been cut out in order to clear the way for inserting an insert screen 80 into the insert screen receptacle region 68, which in the embodiment shown is only accessible if the screen mesh 70 is not yet materially bonded, or if the screen mesh is materially bonded, but a part, here the screen part 72 of the screen mesh 70, has been cut out.Figure 7 shows a sectional view of a paint cup lid 70 with a materially fixed sieve net 70, the sieve area 72 of which is cut out and has the insert sieve 80 inserted into its insert sieve holder 68 analogously to Figure 4.

[0081] The other components shown in Figures 5, 6 and 7 correspond to the components described with reference to Figures 2, 3 and 4.

[0082] Figure 8 shows a sectional view of a paint cup lid area with an insert sieve receptacle 68 without an inserted insert sieve 80 according to a further embodiment. Figure 9 shows a sectional view of the same paint cup lid area with an insert sieve receptacle 68, but with an inserted insert sieve 80 according to a further embodiment. The insert sieve 80 to be inserted, shown in Figure 8, has a fastening region 81 and a sieve region 82. Furthermore, a hand grip geometry 84 is provided on the insert sieve 80, in particular on the fastening region 81 of the insert sieve 80. The insert sieve is placed in the insert sieve receptacle 68 and, analogously, a snap connection is secured thereto by the locking projections 69.

[0083] Figure 10 shows a sectional view of a paint cup lid section with a detailed view of an insert sieve receptacle 68 without an inserted insert sieve according to a further embodiment. Figure 11 shows a sectional view of a paint cup lid section with a detailed view of an insert sieve receptacle 68 with an inserted insert sieve 80 according to a further embodiment. In the embodiment shown here, the insert sieve receptacle 68 further has an insert sieve contact geometry or insert sieve contact surface 68a on the paint cup lid body 65, against which the insert sieve 80 rests when it is located in the insert sieve receptacle 68. The insert sieve 80 is held in a resting position by the locking projections 69, in which the locking geometry 69a on the locking projection 69 interacts with the locking counter geometry 81a on the insert sieve 80 and holds the insert sieve 80 in the corresponding position.The locking projection 69 further comprises a paint guiding surface 69b, which guides the flowing paint and can counteract, for example, a circular flow or turbulence. The paint guiding surface 69b can also be provided with a larger surface, which has a greater paint guiding effect. In the embodiment shown here, the insert sieve 80 has a hand grip geometry 84, which in the embodiment shown here is located on the fastening area 81 of the insert sieve 80. This is only shown schematically here and can be, for example, a recessed grip, a curved grip, a pull tab, or a finger pressure surface, with which the insert sieve 80 is deformed or displaced when pressure is applied by a finger so that it releases from the locked position and can be removed.

[0084] Figure 12 shows an interior view of a paint cup lid 60 according to a further embodiment. Figure 13 shows a partial sectional interior view of a paint cup lid 60 according to a further embodiment. The paint cup lid 60 has a fixing geometry or locking geometry 61a on its first connecting flange 61 for coupling a paint reservoir, such as a paint cup pot 50, as shown in Figure 1, or a lining in the form of a so-called liner or a paint bag. The fixing or locking geometry 61a can also serve for sealing, wherein the sealing can be achieved by a certain excess compared to a paint cup reservoir. The bead shown as an example in Figure 13 serves to ensure secure fastening and prevent slipping.In the interior space 66 of the paint cup lid body 65, a screen mesh fastening area 67 for the screen mesh 70 on the paint cup lid 60 is provided, as well as an insert screen receptacle 68 for a coupled insert screen 80. In the embodiment shown here, the screen mesh fastening area 67 has a screen mesh contact surface 67a, which in the embodiment shown here is designed as a screen mesh contact shoulder for a coupled screen mesh 70. Furthermore, in the embodiment shown here, a circumferential coupling rib 67b is provided, to which a coupled screen mesh 70 can be attached, in particular with a material connection, in particular by means of a welding process, in particular by means of an ultrasonic welding process. In this way, a secure and efficient attachment of the screen mesh 70 (not shown here) can be achieved.The screen mesh 70 is then placed, for example, on the edge of the circumferential rib 67b and welded thereto using an ultrasonic coupler. In the embodiment shown here, further downstream, the paint cup lid body 65 has the insert screen receptacle 68, which is also designed as a shoulder and has an insert screen contact surface 68a for a coupled insert screen 80 (not shown here). Locking projections 69 are distributed, in particular evenly distributed, along the circumference of the insert screen receptacle 68. The locking projections here have locking geometries 69a for securing an insert screen 80 to be secured, as well as paint guide surfaces 69b for guiding the flow of a paint stream and for dampening rotational flows.

[0085] Figure 14 shows sectional views of the second connecting flange 62 of the paint cup lid 60 according to one embodiment. The second connecting flange 62 has an inner passage 62a through which the paint can be supplied to the paint spray gun 100. In the embodiment shown here, a locking shoulder 62b is located inside the passage 62a, which can serve to couple an additional insert screen 85. A flange of such an additional insert screen 85 can engage in the locking shoulder, for example a groove, and be secured there. In the embodiment shown here, a coupling geometry 62c for coupling to a paint dispensing device or paint spray gun 100 is provided on the outside of the second flange 62. This coupling geometry has a clamping surface 62d, inclined in the circumferential direction here, which can serve to clamp the device when engaging behind a corresponding projection on the paint spray gun 100 or its connection 12.The coupling geometry 62c can also have a further inclination in the radial direction, which is designated here by the inclination angle 62e and corresponds to the angle of the radially outwardly directed inclination of the clamping surface 62d. This radially outward inclination can simplify the threading process of the coupling geometry 62c with a corresponding counterstructure on the connection 12 of the paint gun 100 and also effect centering. A sealing lip arrangement 62g can also be provided on the outside of the second connection flange 62, which can improve the seal between the second connection flange 62 and the connection 12 of the paint gun 100. The sealing lip arrangement 62g can have one sealing lip or a plurality of circumferential sealing lips, for example, two or three sealing lips. The sealing lips can be made of an elastic material, e.g.through a 2K process or a correspondingly thin wall thickness with a material that corresponds to that of the paint cup lid body 65. The sealing lips can extend radially and have an axial inclination to simplify insertion into the connection 12 of the paint spray gun 100. The radial extension can be greater than the axial distance between the sealing lips to achieve a compact size in which the sealing lips can support each other. Alternatively, the radial extension can be smaller than the axial distance between the sealing lips to enable space-saving application of the sealing lips to the outside of the connection piece.The inner passage of the second connecting flange 62 can have a first tapered region 62h and a second tapered region 62i, which enable a concentration of the paint flow and allow a structure to be fluidically covered or at least placed in a flow shadow, such as the structure 62b in the form of, for example, a groove. Furthermore, the larger inner diameter of the passage 62a in the region of the coupling geometry 62c improves the material flow during the plastic injection molding process, enables a reduction in material consumption, and reduces the required cooling time in the injection molding tool.

[0086] Figure 15 shows sectional views of a second connecting flange 62 of the paint cup lid 60 with an inserted additional insert sieve 85 according to another embodiment. The additional insert sieve 85 can, for example, be clipped into the structure 62b and secured. The additional insert sieve 85 can have a frame structure with a securing flange and a mesh structure that performs the actual screening. Figure 16 shows such an additional insert sieve 85 according to another embodiment in a perspective view.

[0087] What is common to all the described embodiments is that the second connecting flange 62 (connecting piece) is designed to be bendable or pliable at least relative to the section of the paint cup lid body 65 which forms the funnel-shaped interior region 66a, without this leading to damage or functional impairment of the paint cup lid 60.

[0088] List of reference symbols:

[0089] 10 spray gun bodies

[0090] 12 Connection for paint cup

[0091] 30 operating brackets

[0092] 40 paint cups / paint reservoirs

[0093] 50 paint cup pot / paint reservoir

[0094] 60 paint cup lids

[0095] 61 first connecting flange

[0096] 61a Fixing / locking geometry for coupling to a paint reservoir

[0097] 62 second connection flange

[0098] 62a inner passage of the second connecting flange

[0099] 62b Locking shoulder in the inner passage of the second connecting flange

[0100] 62c Coupling geometry for coupling to a paint dispensing device

[0101] 62d Clamping surface of the coupling geometry

[0102] 62e Angle of the radially outward inclination of the clamping surface

[0103] 62g sealing lip arrangement on the second coupling flange

[0104] 62h first tapered area in the inner passage of the 2nd connecting flange

[0105] 62i second tapered area in the inner passage of the 2nd connecting flange

[0106] 65 paint cup lid body

[0107] 66 Paint lid interior

[0108] 66a funnel-shaped interior area

[0109] 66b upstream mouth of the funnel-shaped interior area

[0110] 66c downstream mouth of the funnel-shaped interior area

[0111] 67 Screen net attachment area for the screen net on the paint cup lid

[0112] 67a Screen net attachment surface / screen net shoulder for a screen net to be connected

[0113] 67b Circumferential coupling rib for a sieve net to be coupled

[0114] 68 Insert sieve holder for a connected insert sieve

[0115] 68a Insert sieve contact surface for a connected insert sieve

[0116] 69 locking projection / locking projections

[0117] 69a Locking geometry on the locking projection

[0118] 69b Paint flow guide surface / paint guide surface on the locking projection

[0119] 70 sieve net

[0120] 71 Screen mesh attachment area of ​​the screen mesh

[0121] 72 Sieve area of ​​the sieve net

[0122] 72a removable part of the sieve area of ​​the sieve net

[0123] 73 Tear line of the sieve mesh 80 Insert sieve

[0124] 81 Insert sieve fastening area of ​​the insert sieve

[0125] 81a Locking counter geometry on the fastening area of ​​the insert sieve

[0126] 82 Sieve area of ​​the insert sieve 84 Hand grip geometry of the insert sieve

[0127] 85 additional insert sieve

[0128] 90 Material nozzle or paint nozzle

[0129] 100 Paint dispenser / paint spray gun

[0130] S Flow direction of the paint

Claims

Claims 1. Paint cup lid for use with a paint cup pot (50) and for coupling to a paint spray gun (100), wherein the paint cup lid (60) comprises: a lid body (65) with a paint cup pot-side first connection flange (61) and a second connection flange (62) on the paint spray gun side, a screen mesh fastening area (67) for a screen mesh (70) to be coupled; an insert screen receptacle (68) for an insert screen (80) to be coupled; wherein the cover body (65) defines an interior space (66) through which a paint can flow, which extends between the first connection flange (61) and the second connection flange (62), and the second connection flange (62) is located downstream of the first connection flange (61); wherein the screen mesh fastening area (67) for a screen mesh (70) to be coupled is arranged in the interior space (66) of the cover body (65) between the first connection flange (61) and the second connection flange (62) circumferentially around the interior space (66) of the cover body (65);wherein the insert sieve receptacle (68) for the insert sieve (80) to be coupled is arranged between the sieve net fastening area (67) for a sieve net (70) to be coupled and the second connecting flange (62) in the interior space (66), wherein the insert sieve receptacle (68) for the insert sieve (80) to be coupled has an insert sieve contact surface (68a) surrounding the interior space (66) of the cover body (65) for the insert sieve (80) to be coupled and a plurality of locking projections (69) arranged along the circumferential insert sieve contact surface (68a); wherein the plurality of locking projections (69) are designed to couple the insert sieve (80) to be coupled circumferentially to the insert sieve contact surface (68a), wherein the sieve net fastening region (67) has a sieve net contact surface (67a) with an axially projecting circumferential coupling rib (67b); 2. Paint cup lid according to claim 1, further comprising a sieve net (70), wherein the sieve net (70) is fixed to the circumferential coupling rib (67b) in a material-locking manner in the sieve net fastening region (67).

3. Paint cup lid for use with a paint cup pot (50) and for coupling to a paint spray gun (100), wherein the paint cup lid (60) comprises: a lid body (65) with a paint cup pot-side first connection flange (61) and a second connection flange (62) on the spray gun side, a sieve net (70); an insert sieve receptacle (68) for an insert sieve (80) to be coupled; wherein the cover body (65) defines an interior space (66) through which a paint can flow, which extends between the first connecting flange (61) and the second connecting flange (62), and the second connecting flange (62) is located downstream of the first connecting flange (61); wherein the sieve net (70) is fixed in a material-locking manner in the interior space (66) of the cover body (65) between the first connecting flange (61) and the second connecting flange (62) circumferentially around the interior space (66) of the cover body (65) in a sieve net fastening region (67);wherein the insert sieve receptacle (68) for the insert sieve (80) to be coupled is arranged in the interior space (66) between the sieve net (70) and the second connecting flange (62), wherein the insert sieve receptacle (68) for the insert sieve (80) to be coupled has an insert sieve contact surface (68a) surrounding the interior space (66) of the cover body (65) for the insert sieve (80) to be coupled and a plurality of locking projections (69) arranged along the circumferential insert sieve contact surface (68a); wherein the plurality of locking projections (69) are designed to couple the insert sieve (80) to be coupled in a circumferentially adjacent manner to the insert sieve contact surface (68a).

4. Paint cup lid according to one of claims 2 and 3, wherein the sieve net (70) has a sieve region (72) and a fastening region (71) surrounding the sieve region, wherein the fastening region (71) is fixed in the sieve net fastening region (67) in a material-locking manner circumferentially around the interior space (66) of the lid body (65).

5. Paint cup lid according to claim 4, wherein the fastening region (71) of the screen mesh (70) is fixed in a material-locking manner around the interior space (66) of the lid body (65) by means of a welding process, in particular an ultrasonic welding process, in the screen mesh fastening region (67).

6. Paint cup lid according to one of claims 4 and 5, wherein at least a part (72a) of the sieve area (72) of the sieve net (70) is detachable from the paint cup lid (60).

7. Paint cup lid according to one of claims 4 to 6, wherein the sieve net (70) has a predetermined tear line (73) in the sieve area (72) along which at least a part (72a) of the sieve area (72) can be separated from the sieve net (70).

8. Paint cup lid according to one of claims 1 to 7, wherein each of the plurality of Locking projections (69) extend radially inwards into the interior (66) of the cover body (65).

9. Paint cup lid according to one of claims 1 to 8, wherein each of the plurality of locking projections (69) has a locking geometry (69a) directed radially inward into the interior (66) of the lid body (65), which is designed to engage behind a fastening region of an insert sieve to be coupled, and has a paint flow guide surface (69b) extending radially outward.

10. Paint cup lid according to one of claims 1 to 9, wherein the interior (66) of the lid body (65) between the first connecting flange (61) and the second connecting flange (62) has a funnel-shaped interior region (66a), wherein the insert sieve contact surface (68a) comprises an upstream mouth (66b) of the funnel-shaped interior region (66a) and a downstream mouth (66c) of the funnel-shaped interior region (66a) merges into the second connecting flange (62).

11. Paint cup lid according to claim 10, wherein the funnel-shaped interior region (66a) is frustoconical.

12. Paint cup lid according to one of claims 1 to 11, wherein the second connecting flange (62) has an inner passage (62a) in which a locking shoulder (62b) is arranged, which is designed to receive corresponding locking arrangements of a further insert sieve to be inserted.

13. Paint cup lid according to claim 12, wherein the second connecting flange (62) in the inner passage (62a) has a first tapered region (62h) upstream of the locking shoulder (62b) in the inner passage (62a) and preferably has a second tapered region (62i) downstream of the locking shoulder (62b) in the inner passage (62a).

14. Paint cup lid according to one of claims 1 to 13, wherein the second connecting flange (62) has, on the radially outwardly directed side opposite the interior (66) of the lid body (65), a sealing lip arrangement (62g) for sealing the second connecting flange (62) with respect to a paint spray gun.

15. Paint cup lid according to one of claims 1 to 14, wherein the first connecting flange (61) is arranged on the side opposite the interior (66) of the lid body (65) and directed radially outwardly directed side has a fixing geometry (61a) for coupling a paint reservoir, in particular for coupling a paint cup pot.

16. Paint cup lid according to one of claims 1 to 15, wherein the second connecting flange (62) has a coupling geometry (62c) for coupling to a paint spray gun on the radially outwardly directed side opposite the interior (66) of the lid body (65).

17. Paint cup lid according to claim 16, wherein the coupling geometry (62c) is designed as a clamping wedge element running at least along a partial circumference of the second connecting flange (62) with a clamping surface (62d) inclined in the circumferential direction of the second connecting flange (62) and to a plane orthogonal to a mounting direction, wherein the clamping surface (62d) is designed to engage behind a clamping projection on a paint spray gun.

18. Paint cup lid according to claim 17, wherein the clamping surface (62d) inclined in the circumferential direction of the second connecting flange (62) and to a plane orthogonal to a mounting direction is further inclined radially from the second connecting flange (62) outwards relative to the plane orthogonal to a mounting direction by an angle (62e) between 10° and 20°, in particular by an angle (62e) of 15° +1-2°.

19. A paint cup system comprising: a paint cup lid according to one of claims 1 to 18; an insert sieve (80) with a sieve region (82) and a fastening region (81) surrounding the sieve region; wherein the fastening region (81) of the insert sieve (80) has a locking counter geometry (81a) which is designed to cooperate with the radially inwardly directed locking geometry (69a) of the locking projections (69) such that the locking geometry (69a) of the locking projections (69) engages behind the fastening region (81) of the insert sieve (80).

20. Paint cup system according to claim 19, insofar as it relates to one of claims 7 to 18, wherein the insert sieve (80) has an outer dimension which is designed such that it can penetrate a contour of a predetermined tear line (73) provided in the sieve net (70).

21. Paint cup system according to one of claims 19 to 20, wherein the insert sieve (80) and / or the sieve net (70) have a hand grip geometry (84) such that is designed such that it allows tool-free removal of the insert sieve (80) from the locking geometry (69a) of the locking projections (69) and / or tool-free separation of the sieve net (70) from the sieve net fastening area (67).

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