A device for holding a metal object during surface treatment
The device addresses the challenge of achieving a visually sharp transition between coated and non-coated areas on metal objects during PVD surface treatment by using a holder that minimizes exposure of the first portion, resulting in aesthetically appealing cutlery with a smooth transition.
Patent Information
- Application Number
- PCT/CN2023/137402
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2023-12-08
- Publication Date
- 2025-06-12
AI Technical Summary
Existing devices for holding metal objects during surface treatment, such as Physical Vapour Deposition (PVD), fail to achieve a visually sharp transition between coated and non-coated portions, which is desirable for creating aesthetically appealing cutlery.
A device comprising a holder with an inner cavity for receiving a first portion of the metal object and an opening for exposing a second portion to surface treatment, ensuring a close fit around the object to minimize exposure of the first portion and achieve a sharp demarcation line between coated and non-coated areas.
The device effectively creates a visually sharp and distinct transition between coated and non-coated portions of the metal object, enhancing the visual appeal of cutlery without the need for post-processing, and ensuring a smooth transition that cannot be felt by hand.
Smart Images

Figure CN2023137402_12062025_PF_FP_ABST
Abstract
Description
A device for holding a metal object during surface treatmentTECHNICAL FIELD
[0001] The invention relates to a device for holding a metal object during surface treatment. More specifically, the holding device is adapted for holding the metal object while it is subjected to physical vapor deposition (PVD) . PVD is a vacuum deposition method where a solid material is vaporized in a vacuum and deposited, which can be used to produce a coating on the metal object. More specifically, PVD creates conditions for achieving a very thin coating on the metal object. One application where it is desirable to use the PVD process is for treating cutlery, such as spoons, forks and knives. The invention further relates to a method for surface treatment of a metal object.SUMMARY
[0002] One object of the invention is to achieve a device for holding a metal object during surface treatment that creates conditions for producing cutlery or other type of metal object with a visually attractive appearance, especially having a visually sharp transition between a coated portion and a non-coated portion.
[0003] Accordingly, there is a desire that a first portion of the metal object should be covered by the coating and an adjacent second portion of the metal object should not be covered by the coating, wherein a visually sharp transition is desired between the PVD coated part and the non-coated part. More specifically, in some cutlery designs, it is desirable to provide a grip portion of the cutlery with the PVD coating and achieve a visually sharp transition between the grip portion and an adjacent cutlery portion adapted for engagement with the food. A spoon is one example of a cutlery. The spoon comprises the first grip portion in the form of an elongated handle at one end and the food engagement portion forming a bowl at the other end for scooping up the food.
[0004] According to one example, the transition between the coated portion and the non-coated portion extends transverse to an extension direction of the cutlery. Further, the wording “visually sharp transition” is used to define a clear / distinct demarcation line between the coated portion and the non-coated portion.
[0005] The object is achieved by a device according to claim 1. Thus, it is achieved by a device for holding a metal object during surface treatment, wherein the device comprises at least one holder that defines an inner cavity for receiving a first portion of the metal object, wherein the holder further defines an opening that connects the inner cavity with an exterior surface of the holder so that a second portion of the metal object, that is intended for being subjected to the surface treatment, may project from the holder via the opening when the first portion of the metal object is received in the inner cavity, wherein a cross section of the holder opening is adapted for a close fit around the metal object so that a minimum of the first portion is exposed for the surface treatment via the opening.
[0006] According to one example, the metal object is formed in the material stainless steel. According to one embodiment example, the device is adapted for being subjected to the surface treatment Physical Vapour Deposition (PVD) . Physical Vapour Deposition creates conditions for application of a very thin layer of material onto a substrate. Further, it creates conditions for an extremely hard surface of the applied material, that allows for a high resistance to scratches.
[0007] According to one example, the holder is adapted so that it forms a sufficiently close fit around the metal object so that significantly no PVD material may reach the first portion via the opening, wherein the desired effect of a visually distinct demarcation line may be achieved without any post-processing or with minor post-processing. According to an alternative, the holder is adapted for allowing a small amount of PVD material to reach the first portion via the opening, wherein post-processing is applied in a consecutive step for achieving the visually distinct demarcation line.
[0008] The surface treatment Physical Vapour Deposition creates conditions for a smooth transition between the coated portion and the non-coated portion. More specifically, the very thin layer of PVD material creates conditions for such a smooth transition that an edge between the coated portion and the non-coated portion cannot be felt by a human hand.
[0009] According to one embodiment example, the metallic coating is applied to the metal object by so-called sputtering vacuum deposition (also referred to as sputter deposition or sputtering) . Sputtering is a PVD coating process which is conducted in an evacuable coating or sputtering chamber. A source of the coating material, the so-called target, is mounted opposite to the substrate items in the sputtering chamber which is then evacuated, generally in the range of 1 to 100 milliTorr (1 Torr = 1 mm Hg) in the presence of an inert gas Such as Argon. A negative DC or RF voltage is applied to the metal sputtering target (metal source) , which is positioned inside the sputtering or coating chamber. A gas plasma or glow discharge is created between the metal target and the item or substrate to be coated. Positively charged gas ions generated in the plasma region are propelled at high velocities towards the target (negative potential) , resulting in the ejection of neutral atomic size particles of the metal target. Thus, sputtering is a non-thermal vaporization process where surface atoms are physically ejected from the metal source or target by momentum transfer or exchange from an energetic bombarding particle or gaseous ion accelerated from plasma.
[0010] According to one further embodiment example, the holder comprises an electrically conducting material for allowing electrically charging of the metal object for facilitating the surface treatment.
[0011] According to one further embodiment example, the holder is adapted for being resistant to temperatures above 200℃.
[0012] According to one further embodiment example, the holder is adapted to maintain its shape when subjected to a vacuum.
[0013] According to one embodiment example, a cross section of the inner cavity is adapted for a close fit around the first portion of the metal object.
[0014] According to one further embodiment example, the opening defines a direction between the inner cavity and the exterior surface of the holder and wherein the inner cavity has a significantly wider extension in relation to the opening in cross sections transverse to the opening direction so that the holder may hold the metal object having a shape with the first portion that is wider than the second portion. According to one example, the opening has a straight centerline.
[0015] According to one further embodiment example, the holder comprises two holder portions that are movable relative to one another between an open state and a closed state, wherein the holder portions jointly define the inner cavity and are adapted for allowing receipt of the first portion of the metal object in the inner cavity when they are in the open state and hold the metal object in the closed state. The two holder portions may be formed in separate bodies.
[0016] According to one example, a first one of the holder portions is provided with a cavity pattern corresponding to a front of the metal object, and a second one of the holder portions is provided with a cavity pattern corresponding to a back of the metal object.
[0017] According to one example, the holder portions are adapted to jointly cover at least a part of the first portion of the metal object. More specifically, the holder portions are adapted to enclose at least a part of the first portion of the metal object. More specifically, the holder portions are adapted to fit snugly around at least a part of the first portion of the metal object.
[0018] According to one further embodiment example, each one of the holder portions has an engagement surface, wherein the engagement surfaces are adapted for engaging each other, and a hole structure with at least one hole extending transverse relative to the engagement surface, wherein at least two holes of the holder portions are configured for being arranged in-line with each other for receipt of a fastener for clamping the holder portions together in the closed state.
[0019] According to one example, the holder portions have generally the same external cross section shape and dimension. According to one example, each one of the holder portions is formed in one single piece. According to one example, the holder portions are formed in the same material.
[0020] According to one further embodiment example, the holder comprises a material of a reinforced thermoplastic polymer.
[0021] According to one further embodiment example, the holder comprises a reinforced material in the poly aryl ether ketone (PAEK) family.
[0022] According to one further embodiment example, the holder comprises a reinforced material of polyether ether ketone (PEEK) .
[0023] According to one further embodiment example, the reinforcement comprises carbon nano fibers in a matrix of the material.
[0024] According to one further embodiment example, the device comprises a plurality of holders, wherein the holders are adapted for being arranged in a stacked state. It creates conditions for an efficient surface treatment process. According to one example, the holder is provided with a generally flat face for contacting a likewise generally flat face of an adjacent holder in the stack.
[0025] According to one further embodiment example, the device comprises a container that defines an inner chamber, wherein the inner chamber has a size corresponding to an external cross section of the holder for receiving said holder in a close fit. According to the example described above where the device comprises a plurality of holders arranged in a stacked state, the inner chamber has a size corresponding to an external cross section of the stacked holders for receiving said stacked holders in a close fit.
[0026] According to one further embodiment example, the container comprises an opening, wherein the container is adapted for receiving the holder in a way that the opening of the holder faces the opening of the container so that the second portion of the metal object may extend through the opening of the container when the metal object is held by the holder.
[0027] According to one further embodiment example, the container comprises an electrically conducting material.
[0028] According to one further embodiment example, the container is of a metal material.
[0029] According to one further embodiment example, the container comprises an attachment portion for attachment to a rack that in turn is adapted to be positioned in a surface treatment chamber.
[0030] According to one further embodiment example, the container attachment portion has the shape of a hook.
[0031] According to a further aspect of the invention, it regards an arrangement for surface treatment comprising a surface treatment container defining an inner chamber, a rack that is arrangeable in the surface treatment chamber and at least one device according to any preceding embodiment example adapted to be attached to the rack in a way that the second portion of the metal object may be exposed to an inner environment in the surface treatment chamber.
[0032] One further object of the invention is to achieve a method that creates conditions for producing cutlery or other type of metal object with a smooth transition between a coated portion and a non-coated portion.
[0033] The object is achieved by a device according to claim 18. Thus, it is achieved by a method for surface treatment of a metal object, comprising the steps of holding a first portion of the metal object by means of a device so that the first portion is at least partly covered and so that a second portion of the metal object projects out from the device via an opening and in a way that the device fits closely around the metal object adjacent the second portion so that a minimum of the first portion is exposed for the surface treatment, and subjecting the second portion of the metal object to the surface treatment while the metal object is held by the device.
[0034] According to one embodiment example, the method comprises the step of subjecting the second portion of the metal object to Physical Vapour Deposition (PVD) while the metal object is held by the device.
[0035] According to one further embodiment example, the method comprises the step of electrically charging the metal object during the surface treatment for attracting particles of a surface treatment material to the second portion of the metal object during the surface treatment.
[0036] According to one further embodiment example, the method comprises the step of removing excess material deposited by means of the surface treatment adjacent the second portion in order to achieve a distinct transition line defining the second portion of the metal object.
[0037] According to one further embodiment example, the method comprises the step of removing the excess material by means of applying a laser beam.
[0038] Further advantages and advantageous features of the invention are disclosed in the following description and in the dependent claims.BRIEF DESCRIPTION OF THE DRAWINGS
[0039] With reference to the appended drawings, below follows a more detailed description of embodiments of the invention cited as examples.
[0040] In the drawings:
[0041] Fig. 1A is a perspective view from above of a device for holding a metal object during surface treatment according to a first embodiment, wherein the device comprises a holder that in turn comprises two portions,
[0042] Fig. 1B is a perspective view from above of the holder, wherein the holder portions are in an open state, wherein they are oriented in a spaced relationship with their cavities facing each other,
[0043] Fig. 1C is a front view of one of the holder portions,
[0044] Fig. 1D is a schematic view of an internal structure of the holder portions,
[0045] Fig. 2 is a perspective view from above of the holder portions according to fig. 1B with a metal object indicated between the holder portions,
[0046] Fig. 3 is a perspective view from above of the holder in a closed state, wherein the holder holds the metal object in fig. 2,
[0047] Fig. 4 is an exploded perspective view from below of a container for receiving a plurality of holders according to fig. 1,
[0048] Fig. 5 is an exploded perspective view from above of the container in fig. 4 with the holders and associated metal objects indicated,
[0049] Fig. 6 is a partly cut perspective view from below of the container in fig. 5 with the holders and metal objects applied,
[0050] Fig. 7 is a perspective view of a PVD container comprising a rack with a plurality of containers as in fig. 6,
[0051] Fig. 8 is a schematic perspective view of a laser operation for removing excess material deposited by means of a PVD operation, and
[0052] Fig. 9 is a perspective view from above of a holder comprising two portions according to an alternative embodiment.
[0053] DETAILED DESCRIPTION OF EXAMPLE EMBODIMENTS
[0054] Fig. 1A is a perspective view from above of a device 1 for holding a metal object 12, see fig. 2, during surface treatment according to a first embodiment. More specifically, the device 1 is adapted for holding the metal object 12 as it is subjected to a physical vapor deposition (PVD) (sometimes called physical vapor transport (PVT) ) .
[0055] The metal object 12, see fig. 2, is in the form of a blank for a spoon. It may be noted that the metal object 12 is generally flat. Accordingly, the blank has not yet been subjected to forming the concave-convex shape of its bowl. The metal object 12 comprises a first portion 14 that forms a rounded, generally oval shape that is gently curved for connecting to a second portion 16 that is generally elongated, straight and forms a handle.
[0056] The cutlery blank for the surface treatment may have been manufactured in a traditional way by starting from a rectangular, flat blank of stainless steel and performing the steps of blanking, rolling, annealing and cutting. Further, the cutlery blank may for example be formed in stainless steel, sterling silver, or an alloy.
[0057] The device 1 comprises a holder 2 that in turn comprises a first holder portion 4 and a second holder portion 6. Each one of the holder portions 4, 6 is generally flat. Further, each one of the holder portions 4, 6 has a generally rectangular shape extending in a flat plane. The holder 2 defines an inner cavity 8, 10 for receiving the first portion 14 of the metal object 12, see fig. 2. The inner cavity 8, 10 corresponds to the first portion 14 of the metal object 12 in size and dimension. More specifically, each one of the holder portions 4, 6 defines a cavity part 8, 10, wherein the holder portions 4, 6 are designed to jointly define the inner cavity 8, 10 when the holder portions are in a closed state. More specifically, each one of the cavity parts 8, 10 faces in a main surface of the flat holder portion 4, 6. Further, a cross section of the inner cavity 8, 10 is adapted for a close fit around the first portion 14 of the metal object 12.
[0058] The holder 2 further defines an opening 18, 20 that connects the inner cavity 8, 10 with an exterior surface 22, 24 of the holder 2 so that a second portion 16 of the metal object 12, that is intended for being subjected to the surface treatment, may project from the holder via the opening 18, 20 when the first portion 14 of the metal object 12 is received in the inner cavity 8, 10. More specifically, each one of the holder portions 4, 6 defines an opening part 18, 20, wherein the holder portions 4, 6 are designed to jointly define the opening 18, 20 when the holder portions 4, 6 are in the closed state. Further, a cross section of the holder opening 18, 20 is adapted for a close fit around the metal object 12 so that a minimum of the first portion 14 is exposed for the surface treatment via the opening 18, 20.
[0059] Each one of the holder portions 4, 6 has an inner shape and dimension that corresponds to the external shape and dimension of the metal object 12. It may be noted that the inner cavity 8, 10 of the holder 2 is open in a direction opposite of the opening 18, 20. More specifically, the metal object 12 has such an extent that it will project out of the opening 18, 20 when it is arranged in its operational state with regard to the holder 2. According to the shown example, the holder portions 4, 6 have an extent corresponding to about half of an extent of the first portion 14 of the metal object 12 in a longitudinal direction of the metal object 12. A material that may be used to form the holder 2 and suitable for a PVD application may be expensive, wherein there is a desire to reduce the amount of material used. According to the embodiment further described below, the holder 2 is arranged in a housing 50 that encapsulates the part of the first portion 14 of the metal object 12 that projects out of the holder 2. Accordingly, the complete first portion 14 of the metal object 12 will be covered during the PVD process.
[0060] Accordingly, the chamber 8, 10 forms a rounded, generally half-oval shape that is gently curved for connecting to the opening 18, 20. More specifically, the holder 2 comprises a smooth transition between the inner cavity 8, 10 and the opening 18, 20. More specifically, the opening 18, 20 has a generally constant cross section along a main part of its extension, wherein an inner end of the opening 18, 20 is gently curved in a transition area connecting to the inner cavity 8, 10.
[0061] The opening 18, 20 defines a direction 19, 21 between the inner cavity 8, 10 and the exterior surface 22, 24 of the holder 2 and wherein the inner cavity 8, 10 has a significantly wider extension in relation to the opening 18, 20 in cross sections transverse to the opening direction 19, 21 so that the holder 2 may hold the metal object 12 having a shape with the first portion 14 that is wider than the second portion 16. More specifically, the inner cavity 8, 10 has a main extension in parallel with an extension plane of the holder 2.
[0062] The first holder portion 4 and the second holder portion 6 are designed so that they are mirrored in an interface. More specifically, the first holder portion 4 and the second holder portion 6 have a corresponding shape and dimension in an extension plane.
[0063] The two holder portions 4, 6 are movable relative to one another between the open state, see fig. 1B, and the closed state, wherein the holder portions jointly define the inner cavity and are adapted for allowing receipt of the first portion 14 of the metal object 12 in the inner cavity 8, 10 when they are in the open state and hold the metal object 12 in the closed state.
[0064] Each one of the holder portions 4, 6 has a flat engagement surface 26, 28, wherein the engagement surfaces 26, 28 are adapted for engaging each other in the closed state. Each one of the holder portions 4, 6 further has a hole structure 30, 32 and 34, 36, respectively, with at least one hole extending transverse relative to the engagement surface 26, 28. More specifically, each one of the holder portions 4, 6 comprises two holes 30, 32 and 34, 36, respectively, that are configured for being arranged in-line with each other pairwise for receipt of a fastener 38, 40, see fig. 5, for clamping the holder portions 4, 6 together in the closed state. Fig. 1C is a front view of the first holder portion 4.
[0065] The holder 2 has certain characteristics associated for being used in a Physical Vapour Deposition (PVD) chamber. Accordingly, the holder 2 comprises an electrically conducting material for allowing electrically charging of the metal object 12 for facilitating the surface treatment. Further, the holder 2 is adapted for being resistant to temperatures above 200℃. Further, the holder 2 is adapted to maintain its shape when subjected to a vacuum.
[0066] Fig. 1D is a schematic view of an internal structure of the holder 2. More specifically, the holder 2 comprises a material 42 of a reinforced thermoplastic polymer, especially a reinforced material in the poly aryl ether ketone (PAEK) family and particularly a reinforced material of polyether ether ketone (PEEK) . The reinforcement comprises carbon nano fibers 44 in a matrix 46 of the material. The two holder portions 4, 6 are made of the same material.
[0067] Fig. 2 is a perspective view from above of the holder portions 4, 6 in the open state according to fig. 1B with the metal object 12 indicated between the holder portions 4, 6. Fig. 3 is a perspective view from above of the holder 2 in the closed state, wherein the holder 2 holds the metal object 12.
[0068] Fig. 4 is an exploded perspective view from below of a container 50 for receiving a plurality of holders 2, 102, 202 of the same design in a stacked state, see also fig. 5. Accordingly, the container 50 defines an inner chamber 51, wherein the inner chamber has a size corresponding to an external cross section of the stacked holders 2, 102, 202 for receiving said holders 2, 102, 202 in a close fit. More specifically, the container 50 has a generally box-like shape with a rectangular cross section, wherein it comprises a rectangular bottom wall 52 and a rectangular top wall 54 of generally the same dimension as the bottom wall 52 and with four lateral rectangular walls 56, 58, 60, 62 that connects the bottom wall 52 and the top wall 54. The four lateral walls 56, 58, 60, 62 are formed in one piece with the bottom wall 52. Further, the top wall 54 is removably connectable to a free end of the four lateral walls 56, 58, 60, 62. More specifically, each one of the four lateral walls 56, 58, 60, 62 comprises a depression 64, 66 at its upper edge. Further, the top wall 54 comprises a corresponding projection 68, 70 at each edge for mating with the depressions 64, 66 for a secure fit.
[0069] The rectangular bottom wall 52 of the container 50 comprises a plurality of openings 72, 74, 76, in the form of parallel slots. The container 50 is adapted for receiving the stacked holders 2, 102, 202 in a way that the openings 18, 20 of the holders 2 faces the openings 72 of the container 50 so that the second portion 16 of the metal object 12 may extend through the opening 72 of the container 50 when the metal object 12 is held by the holder 2 inside of the container 50.
[0070] The container 50 further comprises a rectangular support plate 80 that comprises a plurality of through holes 82, 84, 86 in the form of parallel slots. The rectangular support plate 80 has an external shape and dimension corresponding to an inner shape and dimension of the container 50. Accordingly, the rectangular support plate 80 fits inside of the container 50. Further, the rectangular support plate 80 is adapted to be arranged on top of the stacked holders 2, 102, 104 in a way that the through holes 82, 84, 86 are in line with the chambers 8, 10 of the holders 2 so that a part of the first portion 14 of the metal object 12 projecting from the chambers 8, 10 also projects through the through holes 82, 84, 86 of the rectangular support plate 80. The rectangular support plate 80 is adapted to fit closely inside of the container 50 to reduce the risk that any PVD material that may enter the container 50 via the through holes 72, 74, 76 will reach the projecting parts of the metal objects 12 inside the container 50.
[0071] Each one of two opposite lateral walls 56, 58 of the container 50 comprises two through holes 90, 92, 94, 96 that are arranged in a spaced relationship corresponding to a spacing between the pairs of through holes 30, 34 and 32, 36, respectively, of the holders 2. Accordingly, two sets of through holes 90, 94, 30, 34 and 92, 96, 32, 36, respectively, are arranged in line with each other. Accordingly, the two fasteners 38, 40, see fig. 5, may be received by the sets of inline through holes. More specifically, the fasteners 38, 40 are formed by screws, wherein correspondingly shaped nuts 104, 106 are arranged for mating with the screw threadings on an opposite side of the container 50 relative to the screw heads.
[0072] The container 50 further comprises an attachment portion 110, in the form of a hook, see fig. 5, for attachment to a rack 112, see fig. 7, that in turn is adapted to be positioned in a surface treatment chamber 114. More specifically, the attachment portion 110 is rigidly connected to the top wall 54 and extends away from the container 50.
[0073] Fig. 6 is a partly cut perspective view from below of the container 50 in fig. 5 with the holders 2 and metal object 12 applied. Further, the container 50 comprises an electrically conducting material, wherein electricity may be conducted to the metal object 12 from the rack 112 via the hook 110, the container 50 and the holder 2 during PVD operation. The container 50 may be formed in a metal material. More specifically, fig. 5 and fig. 6 discloses a device 101 for holding the metal object 12 during surface treatment, wherein the device 101 according to this embodiment comprises both the holder 2 and the container 50.
[0074] Fig. 7 discloses an arrangement 109 for surface treatment in the form of PVD comprising a surface treatment container 111 defining an inner chamber 114. More specifically, the surface treatment comprises a coating application happening via sputtering mechanism. The rack 112 is arranged in the surface treatment chamber 114. The device 101 is attached to the rack 112 in a way that the second portion 16 of the metal object 12 is exposed to an inner environment in the surface treatment chamber. More specifically, fig. 7 is a perspective view of the PVD container 111 comprising the rack 112 with a plurality of containers 50. The PVD container 111 has the shape of a box with a door 113 that is hingedly connected to a lateral wall of the container. The rack 112 is rotatably arrangeable in the surface treatment chamber 114 and may alternatively be termed a carousel. Accordingly, the rack 112 is adapted to be continuously rotated during a PVD application operation. The containers 50 holding a set of metal objects 12 are attached to circumferentially spaced support members of the rack 112 by means of the hook 110.
[0075] [Rectified under Rule 91, 27.02.2024]The surface treatment arrangement 109 comprises an inlet 115 for process gases, a Cu plasma anode 117 and cathodes 119 inside of the chamber. The surface treatment arrangement 109 further comprises an associated cathode power supply 121 outside of the chamber that is operatively connected to the cathodes 119. The surface treatment arrangement 109 further comprises a plasma source 125 operatively connected to an interior of the chamber and an associated power supply 123. The surface treatment arrangement 109 further comprises a bias power supply 127 associated to the rack / carousel 112. The surface treatment arrangement 109 further comprises vacuum gauges 129 associated to the chamber for providing a vacuum inside of the chamber. The surface treatment arrangement 109 further comprises a vacuum pump 131. The surface treatment arrangement 109 further comprises a structure of heaters 133 inside of the chamber.
[0076] [Rectified under Rule 91, 27.02.2024]The metallic coating is very thin in relation to the bulk of the metal object and follows the contours on the surface of the part. The thickness of the metallic coating can vary depending upon the particular application, but for weight, cost and manufacturing time, a thin layer is preferred. For example, in a preferred embodiment, the thickness is approximately 200 nanometers or less. Various patterns and ornamental characteristics can adorn the second portion of the metal object, that are known to those in the art, and the present invention is applicable to any such designs.
[0077] [Rectified under Rule 91, 27.02.2024]Fig. 8 is a schematic perspective view of a laser operation for removing excess material deposited by means of the PVD operation. More specifically, a laser device 135 is directed so that a laser beam is pointed towards a transition area of the metal object 12 between the first part 14 and the second part 16. A distinct transition line may be achieved accordingly. In a consecutive step (not shown) , the first part 14 may be formed to a bowl. In other words, the first part 14 may be subjected to a heat process and mechanical forming process for achieving a desired bowled shape permanently.
[0078] [Rectified under Rule 91, 27.02.2024]Fig. 9 is a perspective view from above of a holder 302 comprising two portions 304, 306 according to a second embodiment. For ease of presentation, only the main differences relative to the first embodiment will be described. The holder 302 defines an inner cavity 308 for receiving a first portion of a metal object (not shown) . The metal object 12 is formed by a spoon, wherein the spoon already has already been subjected to forming and therefore presents a bowl at its free end. More specifically, a first one of the holder portions 304 defines a cavity part 308 with a curved shape corresponding to the shape of a convex face of the bowl of the spoon. A second one of the holder portions 306 defines a curved projection 310 corresponding to the shape of a concave face of the bowl of the spoon. The holder portions 304, 306 are designed to jointly define the inner cavity 308 when the holder portions are in a closed state, where the curved projection 310 is received in the cavity part 308. Further, a cross section of the inner cavity 308 is adapted for a close fit around the first portion of the metal object.
[0079] It is to be understood that the present invention is not limited to the embodiments described above and illustrated in the drawings; rather, the skilled person will recognize that many changes and modifications may be made within the scope of the appended claims.
[0080] The term cutlery may alternatively be termed cutlery items or utensils or eating implements or food-implements or food-handling implements or food service tools etc.
Claims
1.A device (1, 101) for holding a metal object (12) during surface treatment, wherein the device comprises at least one holder (2) that defines an inner cavity (8, 10) for receiving a first portion (14) of the metal object (12) , wherein the holder (2, 102) further defines an opening (18, 20) that connects the inner cavity with an exterior surface (22, 24) of the holder so that a second portion (16) of the metal object (12) , that is intended for being subjected to the surface treatment, may project from the holder via the opening (18, 20) when the first portion (14) of the metal object (12) is received in the inner cavity (8, 10) , wherein a cross section of the holder opening (18, 20) is adapted for a close fit around the metal object so that a minimum of the first portion (14) is exposed for the surface treatment via the opening.2.A device according to claim 1, wherein the device (1, 101) is adapted for being subjected to the surface treatment Physical Vapour Deposition (PVD) .3.A device according to claim 1 or 2, wherein a cross section of the inner cavity (8, 10) is adapted for a close fit around the first portion (14) of the metal object (12) .4.A device according to any preceding claim, wherein the opening (18, 20) defines a direction (19, 21) between the inner cavity (8, 10) and the exterior surface (22, 24) of the holder and wherein the inner cavity (8, 10) has a significantly wider extension in relation to the opening (18, 20) in cross sections transverse to the opening direction so that the holder may hold the metal object having a shape with the first portion (14) that is wider than the second portion (16) .5.A device according to any preceding claim, wherein the holder (2) comprises two holder portions (4, 6) that are movable relative to one another between an open state and a closed state, wherein the holder portions (4, 6) jointly define the inner cavity (8, 10) and are adapted for allowing receipt of the first portion (14) of the metal object in the inner cavity (8, 10) when they are in the open state and hold the metal object in the closed state.6.A device according to claim 5, wherein each one of the holder portions (4, 6) has an engagement surface (26, 28) , wherein the engagement surfaces (26, 28) are adapted for engaging each other, and a hole structure (30, 32, 34, 36) with at least one hole extending transverse relative to the engagement surface, wherein at least two holes of the holder portions are configured for being arranged in-line with each other for receipt of a fastener (38, 40) for clamping the holder portions together in the closed state.7.A device according to any preceding claim, wherein the holder (2) comprises a material of a reinforced thermoplastic polymer.8.A device according to any preceding claim, wherein the holder (2) comprises a reinforced material in the poly aryl ether ketone (PAEK) family.9.A device according to any preceding claim, wherein the holder (2) comprises a reinforced material of polyether ether ketone (PEEK) .10.A device according to any one of claims 7-9, wherein the reinforcement comprises carbon nano fibers in a matrix of the material.11.A device according to any preceding claim, wherein the device (101) comprises a plurality of said holders (2, 102, 202) , wherein the holders are adapted for being arranged in a stacked state.12.A device according to any preceding claim, wherein the device (101) comprises a container (50) that defines an inner chamber (51) , wherein the inner chamber has a size corresponding to an external cross section of the holder (2, 102, 202) for receiving said holder in a close fit.13.A device according to claim 12, wherein the container (50) comprises an opening (72) extending between the inner chamber (51) and an external surface of the container, wherein the container (50) is adapted for receiving the holder (2) in a way that the opening (18, 20) of the holder faces the opening (72) of the container so that the second portion (16) of the metal object (12) may extend through the opening (72) of the container (50) when the metal object is held by the holder.14.A device according to claim 12 or 13, wherein the container (50) comprises an electrically conducting material.15.A device according to any one of claims 12-14, wherein the container (50) comprises an attachment portion (110) for attachment to a rack (112) that in turn is adapted to be positioned in a surface treatment chamber (109) .16.A device according to claim 15, wherein the container attachment portion (110) has the shape of a hook.17.An arrangement for surface treatment comprising a surface treatment container (111) defining an inner chamber (114) , a rack (112) that is arrangeable in the surface treatment chamber (114) and at least one device (1, 101) according to any preceding claim adapted to be attached to the rack (112) in a way that the second portion (16) of the metal object (12) may be exposed to an inner environment in the surface treatment chamber.18.A method for surface treatment of a metal object (12) , comprising the steps of holding a first portion (14) of the metal object (12) by means of a device (2, 102) so that the first portion (14) is at least partly covered and so that a second portion (16) of the metal object projects out from the device (2, 102) via an opening (18, 20) and in a way that the device (2, 102) fits closely around the metal object adjacent the second portion (16) so that a minimum of the first portion (14) is exposed for the surface treatment, and subjecting the second portion (16) of the metal object (12) to the surface treatment while the metal object is held by the device.19.A method according to claim 18, comprising the step of subjecting the second portion (16) of the metal object (12) to Physical Vapour Deposition (PVD) while the metal object (12) is held by the device (2, 102) .20.A method according to any one of claims 18-19, comprising the step of electrically charging the metal object (12) during the surface treatment for attracting particles of a surface treatment material to the second portion (16) of the metal object during the surface treatment.21.A method according to any one of claims 18-20, comprising the step of removing excess material deposited by means of the surface treatment adjacent the second portion in order to achieve a distinct transition line defining the second portion (16) of the metal object (12) .22.A method according to claim 21, comprising the step of removing the excess material by means of applying a laser beam.
Citation Information
Patent Citations
Jig system for producing torsion angle for uniform deposition of structure
CN106574367A
Tool for locally spraying solid lubricating film on bolt in batch and local spraying process
CN114178083A
Masking method of material to be plated and its masking jig
JP1993222514A
An ion plating jig ass'y
KR1020070059512A
Support for a spoon and chopsticks
KR1020170105276A