A scissor jig for holding a blade of a pair of scissors

Abstract

A scissor jig (100) for holding a blade (510) of a pair of scissors (500) in relation to a grinding wheel (410) of a grinding apparatus (400) during a grinding operation is disclosed. The scissor jig (100) comprises a support device (200) and a clamping device (300). The support device (200) is configured to be secured in relation to the grinding wheel (410). The clamping device (300) is configured to clamp the blade (510) between a first clamping part (310) and a second clamping part (320). During a grinding operation, a contact surface (325) of the clamping device (300) is configured to be in contact with a glide surface (220) of the support device (200). The support device (200) further comprises a base portion (230) configured to engage with the grinding wheel (410) during positioning of the support device (200) in relation to the grinding wheel (410). The base portion (230) comprises a plurality of reference surfaces (235a, 235b), each one being configured to engage with a grinding wheel of a respective diameter. A system (600) comprising the scissor jig (100) and a method (800) for securing the scissor jig (100) in relation to the grinding wheel (410) is also disclosed.

Description

(0001) This disclosure relates to a scissor jig for holding a blade of a pair of scissors in relation to a grinding wheel during a grinding operation. The disclosure also relates to a grinding system for grinding a blade of a pair of scissors and a method for securing the scissor jig in relation to the grinding wheel.BACKGROUND(0002) To maintain a sharp and precise cutting edge of the blades of a pair of scissors, regular grinding of the scissor blades is generally necessary. The grinding process is typically carried out using a grinding apparatus equipped with a rotating grinding wheel, wherein grinding is performed by holding the scissor blade such that it interacts with the grinding wheel at a desired angle. To achieve a uniform edge geometry across the length of the scissor blade, a scissor jig is often used to position the scissor blade at a desired angle in relation to the grinding wheel during the grinding process.(0003) The scissor jig is typically adapted to the particular grinding apparatus with which it is intended to be used, based on for example the diameter of the grinding wheel. Further, the process of accurately positioning the scissor jig in relation to the grinding wheel is often timeconsuming and require skilled operators. It is therefore desired to develop a scissor jig that is easy to install in an accurate position such that precise grinding results are achieved, and that is adapted to be used with a variety of grinding apparatuses.SUMMARY(0004) It is in view of the above background that the various embodiments disclosed herein have been made.(0005) An object of the present disclosure is therefore to provide a scissor jig for holding a blade of a pair of scissors in relation to a grinding wheel during a grinding operation. More specifically, one object of the disclosure is to provide a scissor jig adapted to facilitate accurate positioning of the scissor jig in relation to a grinding wheel, and a method for securing the scissor jig at the desired position in relation to a grinding wheel before a grinding operation.(0006) In view of this, the present disclosure presents a scissor jig, a grinding system and corresponding methods in accordance with the appended independent claims. Advantageous embodiments are defined in the appended dependent claims.(0007) In a first aspect, there is provided a scissor jig for holding a blade of a pair of scissors in relation to a grinding wheel of a grinding apparatus during a grinding operation, the grinding apparatus being of a type having a support arm extending transversely of the grinding wheel and in parallel with a rotational axis of the grinding wheel; characterized in that the scissor jig comprises a support device and a clamping device configured to be in contact with each other during the grinding operation; wherein the support device comprises a locking mechanism configured to secure the support device at the support arm in relation to the grinding wheel, and a glide surface configured to be in contact with the clamping device during the grinding operation; and wherein the clamping device comprises a first clamping part and a second clamping part for clamping the blade between them, wherein the first clamping part comprises a clamping mechanism for clamping the first clamping part to the second clamping part, and wherein the second clamping part comprises a contact surface configured to be in contact with the glide surface of the support device during the grinding operation; and wherein the support device further comprises a base portion configured to engage with the grinding wheel during positioning of the support device in relation to the grinding wheel, and wherein the base portion comprises a plurality of reference surfaces, each one being configured to engage with a grinding wheel of a respective diameter.(0008) The first aspect of the disclosure may seek to provide a scissor jig that facilitates accurate positioning of the scissor jig in relation to a grinding wheel, and which is adapted to be used with in different types of grinding systems with grinding wheels of different diameters. In this way, a flexible scissor jig is obtained which is easy to set up and achieves precise grinding results when used in a plurality of grinding systems.(0009) In some embodiments, each of the plurality of reference surfaces are disposed at a respective angle for engagement with a grinding wheel of a respective diameter. The plurality of reference surfaces enable quick and accurate positioning of the support device in relation to grinding wheels of different diameters.(0010) In some embodiments, the plurality of reference surfaces are protruding members extending away from the glide surface of the support device. The protruding members provide reference points that enable the base portion to be positioned against the grinding wheel.(0011) In some embodiments, each of the plurality of reference surfaces is provided with a marking for facilitating engagement with a grinding wheel of a respective diameter. In this way, correct positioning of the base position depending on the diameter of the grinding wheel is facilitated.(0012) In some embodiments, the support device further comprises an angle calibration surface. The angle calibration surface is sunken into and disposed at an angle to the glide surface to engage with an angle adjustment device. The angle calibration surface allows interaction with the angle adjustment device to precisely adjust the angle of the support device on the support arm.(0013) In some embodiments, the second clamping part further comprises a grinding wheel positioning surface configured to be positioned against the grinding wheel, and an angle calibration surface configured to be positioned against the glide surface of the support device, such that the second clamping part is enabled to calibrate the angle of the support device on the arm. In this way, a quick and efficient calibration of the angle of the support device on the support arm is enabled without requiring the use of a separate angle adjustment device.(0014) In some embodiments, the locking mechanism is configured to permit the support device to be adjusted both laterally and angularly on the arm. This enables the support plate to be fixed along the arm at a suitable position and angle depending on the requirements of the current grinding operation.(0015) In some embodiments, the glide surface of the support device comprises a patterned structure. The pattern structure enables dust and debris resulting from the grinding operation to be captured such that it does not affect the glide surface.(0016) In some embodiments, the patterned structure includes a hexagonal pattern. The hexagonal pattern improves the gliding properties between the glide surface and the contact surface of the second clamping part.(0017) In some embodiments, the support device is made of cast zinc. This is beneficial as the base portion and glide surface may be made integrated into one part. Further, zinc provides a low friction glide surface in combination with a polymer contact surface of the second clamping part.(0018) In some embodiments, the first clamping part comprises a first and a second clamping component spaced apart on the second clamping part, the first and second clamping component being configured to clamp a respective portion of the blade. Clamping a blade with two clamping components reduces vibrations during a grinding operation.(0019) In some embodiments, the first clamping component is smaller than the second clamping component. This enables smaller scissors blades to be clamped by two clamping components.(0020) In some embodiments, the second clamping part is made of, or otherwise provided with, a deformable material. In some embodiments, the deformable material is a Thermoplastic Elastomer. This is beneficial as it allows scissor blades with a non-planar shape to be clamped by the clamping device.(0021) In a second aspect, there is provided a grinding system for grinding a blade of a pair of scissors, the grinding system comprising: a grinding apparatus comprising a grinding wheel with a rotational axis, a support arm extending transversely of the grinding wheel and in parallel with the rotational axis and a scissor jig comprising a support device and a clamping device as described above, wherein the support device is removably attachable to the support arm for providing a glide surface in relation to the grinding wheel and configured to be in contact with a contact surface of the clamping device during a grinding operation.(0022) The second aspect of the disclosure may seek to provide a griding system comprising a griding apparatus and a scissor jig, wherein the scissor jig may be accurately and efficiently positioned in relation to the grinding wheel of the griding apparatus. In this way, an efficient grinding operation with precise grinding results is enabled.(0023) In some embodiments, the grinding apparatus further comprises an adjustable support mechanism for adjusting the vertical position of the support arm and hence the support device in relation to the grinding wheel. The adjustable support mechanism allows the support device of the scissor jig to be positioned directly on the grinding wheel using one of the plurality of references surfaces in a first step, and subsequently raised from the grinding wheel such that the support device does not interfere with the griding wheel during a grinding operation.(0024) In some embodiments, the adjustable support mechanism comprises a threaded adjustment component. In this way, a simple and efficient adjustment of the vertical position of the support arm is obtained.(0025) In some embodiments, the adjustable support mechanism comprises a height adjustment indicator. In this way, correct adjustment of the vertical position of the support arm is facilitated.(0026) In a third aspect, a method for securing a support device of a scissor jig in relation to a grinding wheel of a grinding apparatus is provided, for interaction with a clamping device of the scissor jig during a grinding operation, the grinding apparatus being of a type wherein a support arm extends transversely of the grinding wheel and in parallel with a rotational axis of the grinding wheel, the method being characterized by: positioning the base portion of the support device at the grinding wheel, such that a second reference surface and a reference surface of the of plurality of reference surfaces corresponding to the diameter of the grinding wheel engages with the grinding wheel; securing the lateral and angular position of the support device at the support arm in relation to a grinding wheel, using the locking mechanism; and adjusting the vertical position of the support device in relation to the grinding wheel using an adjustable support mechanism of the grinding apparatus.(0027) The third aspect of the disclosure may seek to provide a method for accurately and efficiently positioning a support device of a scissor jig in relation to a grinding wheel of a grinding apparatus before a grinding operation, taking the diameter of the grinding wheel into consideration. In this way, an efficient grinding operation with precise grinding results is enabled when a contact surface of a clamping device subsequently interacts with the glide surface of the support device.BRIEF DESCRIPTION OF THE DRAWINGS(0028) Examples are described in more detail below with reference to the appended drawings.(0029) FIG. 1 is a first view of a grinding system according to an example.(0030) FIG. 2 is a scissor jig according to an example.(0031) FIG. 3 is a scissor jig positioned on a grinding wheel.(0032) FIG. 4a is a support device according to an example.(0033) FIG. 4b is a support device positioned in relation to a grinding wheel.(0034) FIG. 5a is a first view of a clamping device according to an example.(0035) FIG. 5b is a second view of a clamping device according to an example.(0036) FIG. 6 is the clamping device used to calibrate the angle of the support device. (0037) FIG. 7 is a second view of the grinding system.(0038) FIG. 8 is a method according to an example.(0039) Like reference numerals refer to like elements throughout the description.DETAILED DESCRIPTION(0040) The detailed description set forth below provides information and embodiments of the disclosed technology with reference to the accompanying drawings. The invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided by way of example so that this disclosure will be thorough and complete, and will fully convey the scope of the invention, such as it is defined in the appended claims, to those skilled in the art.(0041) During use of a pair of scissors, the scissor blades gradually become dull due to friction and material wear, which negatively affects the cutting performance of the pair of scissors. Therefore, regular grinding is necessary. As discussed above, the grinding process is typically carried out using a grinding apparatus equipped with a rotating grinding wheel, wherein grinding is performed by holding the scissor blade at a desired angle in relation to the grinding wheel.(0042) One important parameter affecting a grinding operation is grinding angle. To achieve a uniform and precise cutting geometry across the entire length of the scissor blade, the blade must consistently be held at a desired angle in relation to the grinding wheel. This is commonly accomplished using a scissor jig. A scissor jig is a fixture designed to support and position a scissor blade accurately during the grinding process. The use of a jig ensures repeatable results and enables a more efficient and controlled grinding operation. Therefore, a properly designed scissor jig is an essential component of a grinding system. Typically, the scissor jig is adapted to the specific grinding apparatus with which it is intended to be used.(0043) Another important parameter affecting the grinding result of a scissor blade is the diameter of the griding wheel. In particular, the grinding wheel diameter affects the resulting bevel angle and curvature of the edge. A larger diameter wheel creates a flatter bevel with a broader contact area, while a smaller diameter wheel produces a concave shape along the edge. Grinding systems are typically designed for grinding wheels of a specific wheel diameter. To ensure that a scissor blade meets the grinding surface of the grinding wheel at a desired angle, the distance and angle between the scissor jig and the grinding wheel are typically optimized for a specific wheel diameter. This process is often time-consuming and require skilled operators. Positioning the scissor jig according to a different diameter than the one currently being used may result in undesired cutting edge geometry and uneven grinding.(0044) Further, some scissor jigs are designed for a fixed blade angle or a specific scissor blade size or type, with some scissor jigs being unable to securely hold blades that are curved, tapered, or have non-uniform geometry. Consequently, there is a need for a scissor jig that may be used in a variety of grinding systems, with a variety of scissor blade types.(0045) An object of the present disclosure is therefore to provide a scissor jig, a grinding system comprising the scissor jig, and a method for securing the scissor jig in relation to a grinding wheel of a grinding apparatus, wherein the scissor jig is adapted to be accurately positioned in relation to grinding wheels of different diameters and hold scissor blades of different types.(0046) FIG. 1 is a first view of a grinding system 600 for grinding a blade 510 of a pair of scissors 500 according to an example. The scissor 500 may be any type of scissor comprising a scissor blade 510. The grinding system 600 comprises a grinding apparatus 400 and a scissor jig 100. The grinding apparatus 400 is of the type discussed above. It comprises a grinding wheel 410 with a rotational axis A, and a support arm 420 extending transversely of the grinding wheel 410 and in parallel with the rotational axis A. The scissor jig 100 is removable attached at the support arm 420. Grinding of the blade 510 is performed by holding the blade 510 against the rotating grinding wheel 410 at an angle, be means of the scissor jig 100, such that the edge of the scissor blade 510 is ground to a desired cutting geometry by interaction with a grinding surface of the grinding wheel 410.(0047) FIG. 2 is a view of the scissor jig 100. The scissor jig 100 comprises a support device 200 and a clamping device 300, configured to interact with each other during a grinding operation. The support device 200 is configured to be secured to the support arm 420 by means of a locking mechanism 210. The support device 200 further comprises a glide surface 220 configured to provide an interface for interaction with the clamping device 300. By securing the support device 200 at the support arm 420, the glide surface 220 is positioned at a desired angle and distance in relation to the grinding wheel 100. The support device 200 will be described more in relation to FIG. 4a-b.(0048) The clamping device 300 comprises a first clamping part 310 and a second clamping part 320, configured to securely hold the blade 510 of the pair of scissors 500 between them. To this end, the first clamping part 310 comprises a clamping mechanism 315 for clamping the first clamping part 310 to the second clamping part 320. The second clamping part 320 comprises a contact surface 325 configured to interact with the glide surface 220 of the support device 200 during a grinding operation. Together, the clamping device 300 and the support device 200 enable the blade 510 to be securely held and moved in relation to the grinding wheel 410 at a desired angle during a grinding operation, such that a uniform and precise edge geometry across the entire length of the scissor blade 510 may be obtained. The clamping device 300 will be described more in relation to FIG. 5a-b.(0049) FIG. 3 is a view of a scissor blade 510 interacting with a grinding wheel 410 during a griding operation using the scissor jig 100. The support device 200 is secured at the support arm 420 (not shown) at a desired angle and distance from the grinding wheel 410 by means of the locking mechanism 210. The clamping device 300 holds the blade 510 between the first clamping part 310 cand the second clamping part 320, and the contact surface 325 of the clamping device 300 interacts with the glide surface 220 of the support device 200, such that the blade 510 is in contact with the grinding wheel 410.(0050) FIG. 4a is a view of the support device 200. As discussed above, the support device 200 comprises a locking mechanism 210 configured to secure the support device 200 at the support arm 420 in relation to the grinding wheel 410, and a glide surface 220 configured to be in contact with the clamping device 300 during a grinding operation. The support device 200 further comprises a base portion 230 extending at an angle from the glide surface 220. The base portion comprises an elongated hole configured to receive the support arm 420. In this way, the base portion provides an attachment interface for removably attaching the support device 200 at the support arm 420. The support device 200 may be adjusted both laterally and angularly on the arm 420 and locked into position by means of the locking mechanism 210, which will be understood by a skilled person and not described in further detail.(0051) In addition to providing an attachment interface for the support arm 420, the base portion 230 is configured to be used for correct positioning of the support device 200 in relation to the grinding wheel 410 during set-up of the grinding system 600 before a grinding operation. Therefore, the angle between the base portion 230 and the glide surface 220 is adapted to provide a suitable grinding angle of the blade 510. Preferably, the angle is 60 degrees. As discussed, the grinding resulting will also be affected by the diameter of the griding wheel 410. To this end, the base portion 230 is provided with a plurality of reference surfaces 235a, 235b, wherein each reference surface 235a, 235b is configured to engage with a grinding wheel of a respective diameter. In some examples, the plurality of reference surfaces 235a, 235b are protruding members extending away from the glide surface 230 of the support device 200. In this way, the protruding members provide reference points configured to be positioned against the grinding wheel 210. In addition to the plurality of reference surfaces 235a, 235b, the base portion 230 also comprises a reference point 250 provided on a rear side of the glide surface 220 for positing of the base portion 230 against the grinding wheel 410. In this way, the support device 200 is designed such that a correct angle of the glide surface 220 in relation to the grinding wheel 410 is obtained by positioning the reference point 250 and one of the plurality of reference surfaces 235a, 235b against the grinding wheel, during set up of the grinding system 600 before a grinding operation.(0052) Fig. 4b shows a view of the support device 200 positioned in relation to a grinding wheel 410 by means of one of the plurality of reference surfaces 235a, 235b and reference point 250. For example, one reference surface 235a may be configured to engage with a grinding wheel diameter of 250mm, and one reference surface 235b may be configured to engage with a grinding wheel diameter of 200mm. Although the support device 200 in FIG.4a and 4b is shown to comprise two reference surfaces 235a, 235b, the base portion 230 may comprise more than two refence surfaces, for example three or four reference surfaces. Although 200 mm and 250 mm are used as example diameters, the reference surfaces may be configured to represent any suitable grinding wheel diameter. In some examples, each of the plurality of reference surfaces 235a, 235b is provided with a marking for facilitating engagement with a grinding wheel of a respective diameter. In this way, correct positioning of the base position 230 in relation to a grinding wheel 410 of a specific diameter is facilitated. (0053) During a grinding operation, the glide surface 220 of the support device 200 interacts with the contact surface 325 of the clamping device 300, as discussed above. Therefore, the properties of the glide surface 220 are important to consider. In some examples, the glide surface 220 comprises a patterned structure, wherein the patterned structure may consist of grooves. This enables dust and debris resulting from the grinding operation to be captured, such that it does not affect the glide surface 220. In some examples, the patterned structure includes a hexagonal pattern. The hexagonal pattern improves the gliding properties between the glide surface 220 and the contact surface 325, and enables the clamping device 300 to be efficiently moved in all directions in relation to the support device 200 while the glide surface 220 remains in contact with the support surface 325.(0054) In some examples, the support device 200 is made of cast zinc. A zinc glide surface 220 provides a low friction glide interface between the support device 200 and the clamping device 300, in combination with a polymer contact surface 325 of the clamping part 300. Further, a cast zinc support device 200 enables the base portion 230 and the glide surface 220 to be integrated into one part.(0055) FIG. 5a is a view of the clamping device 300. As discussed above, the clamping device 300 comprises a first clamping part 310 and a second clamping part 320 for clamping the blade 510 between them by means of a clamping mechanism 315 provided on the first clamping part 310. In some examples, the clamping mechanism 315 comprises at least one threaded screw configured to engage a corresponding hole on the second clamping part 320. However, a skilled person will realize that any suitable way of clamping one part to another is possible. By means of the clamping mechanism 315, the distance between the first clamping part 310 and the second clamping part 320 may be adjusted and adapted to the thickness of the blade 515, such that the blade 510 is securely locked between a corresponding clamping edge 330 of each of the first and second clamping part 310, 320.(0056) The second clamping part 320 further comprises the contact surface 325 configured to be in contact with the glide surface 220 of the support device 110 during the grinding operation. In some examples, the second clamping part 320 is made of a low friction polymer material. In some examples, the material is nylon. A low friction material facilitates the movement back and forth of the contact surface 325 in relation to the glide surface 220, such that the entire edge of the blade 515 that is being ground may be held in contact with the grinding wheel 410.(0057) In some examples, the second clamping part 320 is provided with a deformable material. The deformable material is provided at a surface configured to be in contact with the scissor blade 510 when the scissor blade 510 is clamped between the first 310 and the second clamping part 320. In some examples, the deformable material is a Thermoplastic Elastomer, TPE. A deformable material further allows scissor blades with a non-planar shape to be clamped between the first clamping portion 310 and the second clamping portion 320, as the second clamping portion 320 will adjust to the shape of the blade. TPE further provides friction to improve the clamping properties of the first 310 and the second clamping part 320. The deformable material may me moulded to the low friction material of the second clamping part 320.(0058) In some examples, as shown in FIG. 5a, the first clamping part 310 comprises a first clamping component 310a and a second clamping component 310b, spaced apart on the second clamping part 320. Each of the first and second clamping components 310a, 310b comprises a respective clamping mechanism 315a, 315b and a respective clamping edge 330, configured to clamp a respective portion of the blade 510. Clamping a blade using two or more clamping components reduces vibrations during a grinding operation. In some examples, the first clamping component 310a is smaller than the second clamping component 310b, whereby the first clamping component 310a is configured to be positioned closer to the center of the scissor, and the second clamping component 310b is configured to be positioned closer to the tip of the scissor blade 515. By configuring the first clamping component 310a to be smaller than the second clamping component 310b, also smaller pairs of scissors with shorter scissor blades are enabled to be clamped by two clamping components.(0059) FIG. 5b is a rear view of the clamping device 300. As can be seen, the second clamping part 320 may further comprise a grinding wheel positioning surface 340 and an angle calibration surface 350. The grinding wheel positioning surface 340 is a surface sunken into the contact surface 325, providing a reference surface configured to be positioned against the grinding wheel 410. The angle calibration surface 350 is a surface provided on an edge perpendicular to the contact surface 325, providing a reference surface for the angle of the glide surface 220 of the support device 200. Together, wheel positioning surface 340 and angle calibration surface 350 form a reference system enabling the clamping device 300 to be used to as an angle calibration device, as shown in FIG. 6. Calibrating the angle of the support device 200 on the arm 420 enables the angle of the support device 200 to be more precisely defined, such that more precise grinding results may be achieved.(0060) FIG. 6 is a view of the second clamping part 320 being used to calibrate the angle of the support device 200 on the support arm 420 (not shown) in relation to the griding wheel 410. Here, the second clamping part 320 is positioned against the grinding wheel 410 using the grinding wheel positioning surface 340, discussed above. The angle calibration surface 350 may then be used as a reference for the angle of the glide surface 220, during positioning of the support device 200 on the support arm 420. The angle calibration surface 350 may be designed to have any desired angle in relation to the clamping edge 330. In a preferred example, the angle is 60 degrees. Using the second clamping part 320 to calibrate the angle of the glide surface 220 allows for an efficient and facilitated setup of the scissor jig 100 in relation to the grinding wheel 410.(0061) In some cases, it may be desired to use an angle calibration device adjustable for different angles instead of the second clamping part 320 to calibrate the angle of the support device 200 on the support arm 420. To this end, the glide surface 220 of the support device 200 is provided with an angle calibration surface 240, as can be seen in FIG. 4a. The angle calibration surface 240 is sunken into and disposed at an angle to the glide surface 220, adapted to engage with the angle adjustment device.(0062) After the support device 200 has been correctly positioned on the griding wheel 410 using one of the plurality of refence surfaces 235a, 235b, and secured on the support arm 420 using the locking mechanism 215, the support device 200 must be vertically elevated from the grinding wheel 410 in order to avoid interference with the grinding wheel 410 during a subsequent grinding operation. To this end, the grinding apparatus 400 further comprises an adjustable support mechanism 430.(0063) FIG. 7 is a second view of the grinding system 600 comprising the scissor jig 100 and the grinding apparatus 400, showing the adjustable support mechanism 430. The adjustable support mechanism 430 is configured to adjust the vertical position of the support arm 420, and hence the support device 200, in relation to the grinding wheel 410. This ensures that the support device 200 will not interfere with the grinding wheel 410 during the grinding operation. In some examples, the adjustable support mechanism 430 comprises a threaded adjustment component. In some examples, the adjustable support mechanism comprises a height adjustment indicator. A threaded adjustment component provides a simple and efficient adjustment of the vertical position of the support arm 420, while a height adjustment indicator facilitates correct setting the vertical position of the support arm 420.(0064) FIG. 8 is a flow chart of a method for securing a support device 200 of a scissor jig 100 in relation to a grinding wheel 410 of a grinding apparatus 400, wherein the scissor jig 100 and grinding apparatus 400 are of the type discussed above.(0065) At 802, the base portion 230 of the support device 200 is positioned on the grinding wheel 410 such that one of the plurality of reference surfaces 235a, 235b engages with the grinding wheel 410. The reference surface corresponding to the diameter of the grinding wheel 410 being used is selected for the positioning of the support device 200. For example, if the grinding wheel diameter is 200 mm, a reference surface representing diameter 200 mm is used. Thereby, the glide surface 220 will obtain a desired angle in relation to the grinding wheel 410. Thus, the base portion 230 functions as a reference system, and quick and accurate positioning of the support device 200 during set up of the grinding system 600 is enabled.(0066) Optionally, the second clamping portion 320 of the clamping device 300 may be used to calibrate the angle of the glide surface 220 in relation the grinding wheel 410, by positioning the wheel positioning surface 340 of the second clamping portion 320 against the grinding wheel 410, and the glide surface 220 against the an angle calibration surface 350. Optionally, an angle adjustment device may be used to adjust the angle of the glide surface 220 in relation the grinding wheel 410, by interaction between the angle adjustment device and the angle calibration surface 240 of the support device 200. This will result in an even more precise angle of the glide surface 220 in relation the grinding wheel 410.(0067) At 804, the lateral and angular position of the support device 200 at the support arm 420 is secured using the locking mechanism 210. In this way, the support device 200 is securely fixated at the desired position and angle, such that it may be used as in interface for interaction with the clamping device 300 during a grinding operation.(0068) At 806, the adjustable support mechanism 430 of the grinding apparatus 400 is used to vertically adjust the position of the support arm 420, and thereby the support device 200, in relation to the grinding wheel 410. In this way, it is ensured that the support device 200 will not interfere with the girding wheel 410 during the grinding operation.(0069) The scissor jig, system and method of the present disclosure enables facilitated configuration of a variety of grinding systems, as well as accurate and precise grinding results of a variety of scissor blade geometries.(0070) Modifications and other variants of the described embodiments will come to mind to one skilled in the art having benefit of the teachings presented in the foregoing description and associated drawings. Therefore, it is to be understood that the embodiments are not limited to the specific example embodiments described in this disclosure and that modifications and other variants are intended to be included within the scope of this disclosure. Therefore, a person skilled in the art would recognize numerous variations to the described embodiments that would still fall within the scope of the appended claims. As used herein, the terms “comprise / comprises” or “include / includes” do not exclude the presence of other elements or steps. Furthermore, although individual features may be included in different claims, these may possibly advantageously be combined, and the inclusion of different claims does not imply that a combination of features is not feasible and / or advantageous. In addition, singular references do not exclude a plurality.

Claims

1. A scissor jig (100) for holding a blade (510) of a scissor (500) relative to a grinding wheel (410) of a grinding machine (400) during a grinding operation, the grinding machine (400) being of a type comprising a support arm (420) extending transversely across the grinding wheel (410) and parallel to an axis of rotation (A) of the grinding wheel (410); characterised in that the scissor jig (100) comprises a support device (200) and a clamping device (300) arranged to be in contact with each other during the grinding operation; the support device (200) comprising a locking mechanism (210) arranged to secure the support device (200) to the support arm (420) relative to the grinding wheel (410), and a sliding surface (220) arranged to be in contact with the clamping device (300) during the grinding operation; andthe clamping device (300) includes a first clamping member (310) and a second clamping member (320) for clamping the blade (510) therebetween, the first clamping member (310) including a clamping mechanism (315) for clamping the first clamping member (310) against the second clamping member (320), and the second clamping member (320) including a contact surface (325) arranged to be in contact with the sliding surface (220) of the support device (200) during the grinding operation; andthe support device (200) further comprises a base portion (230) arranged to interact with the grinding wheel (410) during positioning of the support device (200) relative to the grinding wheel (410), the base portion (230) comprising a plurality of reference surfaces (235a, 235b), each arranged to interact with a grinding wheel of a respective diameter.

2. The scissor jig (100) of claim 1, wherein each of the plurality of reference surfaces (235a, 235b) is arranged at a respective angle for interaction with a grinding wheel (410) of a respective diameter.

3. The scissor jig (100) according to claim 1 or 2, wherein the plurality of reference surfaces (235a, 235b) are projections extending away from the sliding surface (220) of the support device (200).

4. The scissor jig (100) according to claim 3, wherein each of the plurality of reference surfaces (235a, 235b) is provided with a marking to facilitate interaction with a grinding wheel (410) of a respective diameter.

5. The scissor jig (100) according to any one of the preceding claims, wherein the support device (200) further comprises an angle calibration surface (240), wherein the angle calibration surface (240) is recessed into and arranged at an angle to the sliding surface (220) to interact with an angle adjustment device arranged to calibrate the angle of the support device (200) on the support arm (420).

6. The scissor jig (100) according to any one of the preceding claims, wherein the second clamping part (320) further comprises a grinding wheel positioning surface (340) arranged to be positioned against the grinding wheel (410), and an angle calibration surface (350) arranged to be positioned against the sliding surface (220) of the support device (200), so that the second clamping part (320) can calibrate the angle of the support device (200) on the support arm (420).

7. The scissor jig (100) according to any one of the preceding claims, wherein the locking mechanism (210) is arranged to allow the support device (200) to be adjusted both laterally and angularly on the support arm (420).

8. The scissor jig (100) according to any one of the preceding claims, wherein the sliding surface (220) of the support device (200) comprises a patterned structure.

9. The scissor jig (100) of claim 8, wherein the patterned structure comprises a hexagonal pattern.

10. The scissor jig (100) according to any one of the preceding claims, wherein the support device (200) is made of cast zinc.

11. The scissor jig (100) according to any one of the preceding claims, wherein the first clamping part (310) comprises a first and a second clamping component (310a, b), which are separately arranged on the second clamping part (320), wherein the first and second clamping components (310a, b) are arranged to clamp a respective part of the blade (510), wherein the first clamping component (310a) is smaller than the second clamping component (310b).

12. The scissor jig (100) according to any one of the preceding claims, wherein the second clamping member (320) is made of, or otherwise provided with, a deformable material.

13. The scissor jig (100) according to claim 12, wherein the deformable material is a thermoplastic elastomer, TPE.

14. A sharpening system (600) for sharpening a blade (510) of a pair of scissors (500), the sharpening system (600) comprising:a grinding machine (400) comprising a grinding wheel (410) with an axis of rotation (A), and a support arm (420) extending across the grinding wheel (410) and parallel to the axis of rotation (A), anda scissor jig (100) according to any one of claims 1-13, comprising a support device (200) and a clamping device (300), wherein the support device (200) is removably attachable to the support arm (420) to provide a sliding surface (220) relative to the grinding wheel (100) and arranged to be in contact with a contact surface (325) of the clamping device (300) during a grinding operation.

15. The grinding system (600) of claim 14, wherein the grinding machine (400) further comprises an adjustable support mechanism (430) for adjusting the vertical position of the support arm (420), and thereby the support device (200), relative to the grinding wheel (410).

16. The grinding system (600) of claim 15, wherein the adjustable support mechanism (430) includes a threaded adjustment component.

17. The grinding system (600) of any one of claims 15 to 16, wherein the adjustable support mechanism (430) includes a height adjustment indicator.

18. A method (800) for attaching a support device (200) of a scissor jig (100) according to any one of claims 1-13 relative to a grinding wheel (410) of a grinding machine (400), for cooperation with a clamping device (300) of the scissor jig (100) during a grinding operation (100), wherein the grinding machine (400) is of a type where a support arm (420) extends across the grinding wheel (410) and parallel to an axis of rotation (A) of the grinding wheel (410), wherein the method (800) is characterized by:positioning (802) the base portion (230) of the support device (200) at the grinding wheel (410) such that a reference surface (235a, 235b) of the plurality of reference surfaces (235a, 235b) corresponding to the diameter of the grinding wheel (410) interacts with the grinding wheel (410);securing (804) the lateral and angular position of the support device (200) at the support arm (420) relative to a grinding wheel (410), using the locking mechanism (210); andadjusting (806) the vertical position of the support device (200) relative to the grinding wheel (410) using an adjustable support mechanism (430) of the grinding machine (400).