Patent Publication Number: US-10781070-B2

Title: Device and method for forming three dimensional shape to elongated material

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is a Continuation of U.S. patent application Ser. No. 14/770,705, filed on Aug. 26, 2015, which was filed as the National Phase of PCT International Application No. PCT/EP2014/053934 on Feb. 28, 2014, which claims the benefit of priority to Finnish Application No. 20135188, filed on Feb. 28, 2013, all of which are hereby expressly incorporated by reference into the present application. 
    
    
     FIELD OF THE INVENTION 
     The present invention relates to a device for forming an elongated material. The present invention further relates to a method for forming an elongated material. 
     BACKGROUND OF THE INVENTION 
     Knots are usually made to elongated materials manually or with devices. Knots are conventionally used in fishing for attaching lures to fishing lines. Knots may also be used in textile applications for providing knots to yarns or in some other industrial or non-industrial applications. Knots are also produced in medical applications in connection with stiches, surgical operations or the like. In many situations it may be difficult to form knots manually due to weather conditions outside or due to other circumstances. Also some elongated materials have characteristics which make forming knots very difficult, such characteristics comprising rigidity, slipperiness or small diameter of the elongated material. For alleviating the above mentioned difficulties there are different kinds of devices for making knots. One prior art device for forming knots is described in International Patent Application having publication number WO 2007/063175 A1 and published Jun. 7, 2007. 
     The prior art devices for forming a knot comprise a body, a central cavity inside the body, a material track along which the elongated material is guided in the device, the material track comprising opening extending along the material track and open to the central cavity. The material track is shaped or provided such that it forms a preformed knot to the elongated material. The finished knot may be produced by tightening the preformed knot. The tightening may be carried out by pulling. For forming the knot elongated material is fed into the device such that the front end of the elongated material moves through the geometry of the material track such that the preformed knot is produced. After that the elongated material is pulled from the material track to the central cavity though the opening of the material track. After releasing the elongated material into the central cavity the preformed knot is tightened by pulling and the elongated material with the knot may be removed from the device. The apparatus may be designed such that the elongated material may be attached to an object with the knot. In some embodiments the object, such as a fishing lure, may be connected to the device such that the device automatically attaches the elongated material to the object when the knot is formed. 
     In the prior art devices the elongated material travels along the material track when it is pushed or drawn. The material track comprises the opening that is open to the central cavity of the device. The central cavity is provided for releasing the elongated material from the material track when the knot is preformed, such that the preformed knot may be tightened to a finished knot. The material track comprises of several turns and curves which the elongated material follows as it travels through the desired geometry of the material track. In the prior art devices the elongated material follows the track during travelling based on the internal tension of the elongated material. If the internal tension or diameter of the elongated material is not in optimal range the elongated material will not remain in the material track. Therefore the elongated material may escape from the material track to the central cavity or simply become stuck in the material track itself. If the internal tension of the elongated material is too high or the diameter too large, the elongated material cannot travel through the turns and curves of the material track. If the internal tension is too low or the diameter too small, the elongated material may fold in the material track preventing the elongated material to travel further in the material track or blocking the material track. According to the above mentioned the problem with the prior art devices is that their operation is limited to only certain types of elongated materials having certain internal tension, diameter and material. This means that separate devices have to be provided for different types of elongated materials. 
     BRIEF DESCRIPTION OF THE INVENTION 
     An object of the present invention is to provide a device and a method so as to overcome or at least alleviate the above mentioned problems. The objects of the invention are achieved with a device and with a method respectively set forth in the independent claims. 
     The preferred embodiments of the invention are disclosed in the dependent claims. 
     The invention is based on the idea of guiding the elongated material along at least part of the blocked material track inside the device. The guiding of the elongated material through the material track comprises providing the device with one or more shutter or guide elements. The one or more guide elements may be provided in the central cavity of the device such that the shutter elements guide the elongated material as it travels along the material track. The one or more shutter elements are arranged to prevent the elongated material escaping from the material track to the central cavity via the opening along at least part of the opening and/or block at least part of the opening for preventing the elongated material from escaping from the material track. For releasing the elongated material from the material track into the central cavity the shutter elements are removed from the central cavity or they are displaced in the central cavity in relation to the material track, such that the elongated material may enter the central cavity from the material track. The device may also alternatively or additionally be formed such that it may be opened for removing the elongated material from the material track. In one embodiment the device may be opened such that it may be split into at least first body part and second body part for opening the central cavity and removing the elongated material from the device via the central cavity. The device and method of the present invention may be used for forming elongated material, such as line, fishing line, thread yarn, wire, metal wire or the like for providing three dimensional configurations, knots, coil springs, windings or the like. 
     The shutter elements, or guide means, provided to the central cavity facilitate the travelling of the elongated material in the material track and also prevents collapsing/folding of the elongated material. The one or more shutter elements may also prevent the elongated material from escaping or exiting from the material track into the central cavity. In the present invention the shutter elements block the opening of the material track to the central cavity preventing the elongated material from becoming stuck or bending against the material track. Furthermore, the shutter elements make it possible to form knots to many different kinds of elongated materials. Therefore, the same device functions for a wide range of elongated materials with different diameters, internal tensions and material properties without need for modifications. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       In the following the invention will be described in greater detail by means of preferred embodiments with reference to the attached [accompanying] drawings, in which 
         FIG. 1  shows a schematic perspective view of one embodiment of the device according to the present invention; 
         FIG. 2  shows another schematic perspective view of the embodiment of  FIG. 1 ; 
         FIG. 3  shows yet another schematic perspective view of the embodiment of  FIG. 1 ; 
         FIG. 4  shows still another schematic perspective view of the embodiment of  FIG. 1 ; 
         FIG. 5  shows an illustrative detailed view of one embodiment of the material track and the barrier element according to the present invention; 
         FIG. 6  shows an illustrative detailed view of another embodiment of the material track and the barrier element according to the present invention; 
         FIG. 7  shows an illustrative detailed view of yet another embodiment of the material track and the barrier element according to the present invention; and 
         FIG. 8  shows an illustrative detailed view of yet another embodiment of the material track and the barrier element according to the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       FIG. 1  shows schematically one embodiment of a device for forming knots according to the present invention. The device comprises a body formed from a first body part  2  and second body part  4 . The body  2 ,  4  forms a closed structure. The device or at least the body of the device is arranged to be split such that the body may be opened. In the embodiment of  FIG. 1  the body is split to the first and second body parts  2 ,  4  such that the device or body may be opened. The first and second body part  2 ,  4  are connected to each other with a hinge arrangement  6 ,  7  such that the first and second body part  2 ,  4  bay be moved in relation to each other. The hinge arrangement comprises a first hinge part  6  provided to the first body part  2  and a second hinge part  7  provided to the second body part  4  and also a hinge pin (not shown) for connecting the hinge parts  6 ,  7  pivotally together. It should be noted that the body parts  2 ,  4  may also be totally separable from each other without any hinge arrangement. Furthermore, the body parts  2 ,  4  may also be separable through a linear movement. In this case the body parts may be totally separable or they may be connected to each other for example with a connection bar allowing the linear movement. The body or the device may also be split into three or more body parts, thus not restricting the invention to any configuration of opening the device or the body. The body parts may be secured to each other with a locking mechanism or for example with a mortise joint or some other suitable means. In an alternative embodiment the device or the body of the device is one integral unit which may not be opened or split. 
     The device or the body  2 ,  4  of the device is at least partly hollow or comprises a cavity, meaning that the closed structure of the body  2 ,  4 , or body parts, encloses a hollow cavity inside the body  2 ,  4 . In the embodiment of  FIG. 1  the device or the body  2 ,  4  comprises a central cavity  11 ,  13 . In this embodiment the body  2 ,  4  comprises hollow central core provided with the central cavity  11 ,  13 . The central cavity  11 ,  13  may be substantially cylindrical or conical or otherwise shaped hollow space. The present invention is not restricted to any certain shape of the central cavity  11 ,  13 . In the embodiment of  FIG. 1  the central cavity  11 ,  13  is formed by the first and second body parts  2 ,  4  when they are arranged in closed state against each other. In the embodiment of  FIG. 1  the first and second body parts  2 ,  4  are substantially similar such that each of them form substantially half of the central cavity  11 ,  13 . In an alternative embodiment the first and second body parts  2 ,  4  may form different kind of sections of the central cavity. 
     The device or the body  2 ,  4  of the device is further provided with a material track  3 ,  5  along which elongated material travels inside the device for forming a knot. The material track comprises an inlet opening  40  through which the elongated material is fed to the material track  3 ,  5 . The material track also comprises an outlet opening  41  through which the elongated material exits the material track  3 ,  5 , or the device or body  2 ,  4  of the device. The elongated material is fed to the material track through the inlet opening  40  and it travels along the material track  3 ,  5  to the outlet opening  41  through the certain geometry defined by the material track  3 ,  5 . The geometry of the material track  3 ,  5  is formed such that the elongated material forms a preformed knot or alternative three dimensional shape when it is fed through the material track  3 ,  5 . The material track  3 ,  5  shown in  FIG. 1  is one example of geometry for providing a knot and it should be noted that the geometry of the material rack  3 ,  5  may vary in different applications for producing different kinds of knots. Thus the present invention is not restricted to any particular geometry of the material track  3 ,  5  or any particular type of knot or three dimensional shape. 
     The material track  3 ,  5  is at least partly formed as a groove surrounding the central cavity  11 ,  13  and provided to the inner wall of the central cavity  11 ,  13 . At least part of the material track  3 ,  5  is formed to the inner wall of the central cavity  11 ,  13 , as shown in  FIG. 2 . In other words the material track comprises an opening  32  extending along at least part of the material track  3 ,  5  and open to the central cavity  11 ,  13 . In the embodiment of  FIG. 2 , the material track  3 ,  5  forms loops around the central cavity  11 ,  13  for forming the knot. The opening  32  may extend along the whole material track  3 ,  5 , or alternatively along only part of the material track  3 ,  5 . 
     The device further comprises a feed mechanism for feeding the elongated material into the device and to the material track  3 ,  5  and further through the material track  3 ,  5 . The front end of the elongated material is fed along and through the material track  3 ,  5  such that the geometry of the material track  3 ,  5  forms the preformed knot. The feed mechanism comprises of the embodiment of  FIG. 2  comprises feed roll  10  having a rotation axis  12 . The feed roll  10  may be driven manually, with electric motor or some other kinds of rotation means by driving the rotation axis  12 . In this embodiment the feed roll  12  is provided to the fist body part  2 . The feed roll  10  may also be provided to the second body part  4 . The feed mechanism may further comprise gear wheel or some other power transmission means for rotating the central axis  12  and further the feed roll  10 . As shown in  FIG. 1  the feed roll  10  extends substantially through the whole central cavity  11 ,  13  in transversal direction in relation to the material track  3 ,  5  such that the same feed roll  10  may be used for feeding the elongated material in several locations along the material track  3 ,  5 . This means that the feed roll  10  intersects the material track  3 ,  5  at least in two different locations for enhancing the feeding of the elongated material through the material track  11 ,  13 . However it should be noted that the feed roll  10  may also be provided as a short roll which provides only one contact point with the elongated material at the inlet opening or in the vicinity thereof. The feed mechanism is further provided with a counter surface provided at distance from the feed roll  10 . The elongated material is fed such that it is pressed against the feed roll  10  and the counter surface in the gap between the feed roll  10  and the counter surface. The feed roll  10  and the counter surface may also be in contact with each other and the elongated material is fed through between them. The feed mechanism may be arranged to either push or pull the elongated material through the material track  3 ,  5 . Furthermore, it should be noted that the feed mechanism may be any kind of feed mechanism and the present invention is not restricted to any kind of feed mechanism. 
     The device further comprises a connection point  20 ,  21  for attaching an object, such as a fishing lure, to the elongated material. A connection loop or the like of the object is placed or installed to the connection point  20 ,  21  for attaching the elongated material to the object with the formed knot. The material track  3 ,  5  is formed such that it leads the elongated material through the connection loop of the object in the connection point  20 ,  21  when the elongated material is fed through the material track  3 ,  5 . The connection point  20 ,  21  is preferably provided such that the object may be secured to the connection point  20 ,  21  with the connection loop. 
     The device of the present invention further comprises one or more guide elements, or shutter elements, which may be arranged in the central cavity  11 ,  13  for guiding the elongated material along at least part of the material track  3 ,  5  and preventing the elongated material escaping from the material track  3 ,  5  to the central cavity  13 ,  15  via the opening  32 . 
     In the embodiment of  FIGS. 1 to 4  the shutter element is provided in the form of core element  8  arranged inside the central cavity  11 ,  13 . As shown in the figures the core element  8  is connected to the first and second body part  2 ,  4  via the hinge arrangement  6 ,  7 . The feed roll  10  may also be provided to the core element  8 . In other words the core element  8  is directly connected to the hinge arrangement  6 ,  7  such that the first and second body parts  2 ,  4  may be moved away from the core element  8  when the device is opened. Thus the core element  8  moves in relation to the first and second body part  2 ,  4  when the device is opened and closed. In the closed state of the device the body parts  2 ,  4  surround the core element  8  and the core element  8  fills at least part of the central cavity  11 ,  13 . The outer surface of the core element  8  may be formed to at least partly substantially conform the shape of the inner wall of the central cavity  11 ,  13 . In the embodiment of  FIGS. 1 to 4  the core element  8  is provided as substantially solid element, but it may also be at least partly hollow. Accordingly, the core element  8  prevents the elongated material escaping from the material track  3 ,  5  and thus closes opening  32  of the material track  3 ,  5  such that elongated material cannot exit the material tarck  3 ,  5  via the opening  32 . 
     In an alternative embodiment the core element  8  may be directly connected to both or one of the body parts  2 ,  4  and not to the hinge arrangement  6 ,  7 . Furthermore, the core element  8  may also be a totally separate element or elements which are removed from the device when it is opened. Alternatively the core element may be removed from the device when the device is in closed state, for example by pushing or pulling the core element(s)  8  out of the central cavity  11 ,  13 . In this embodiment the device does not need to be formed to be opened. In a yet alternative embodiment the core element  8  may be provided displaceable in the central cavity  11 ,  13 . The shutter elements may also be provided as some other kind of elements instead of the core elements. The shutter elements may for example be a shutter sleeve or sleeves arranged inside the central cavity  11 ,  13  or shutter flanges, nails or fingers extending from the body parts  2 ,  4 . They could also be flanges/fingers separate from the body parts like pins or needles put in to place through the body parts. It should noted that the shutter elements are provided into the central cavity  11 ,  13  of the device when the device is in closed state, but the shutter elements may be implemented and formed in many different ways and the core element  8  and the shutter flanges are only exemplary embodiments. One alternative is, as illustrated in  FIG. 8 , a tube or straw  37  which is introduced into the material track  3 ,  5  together with or separately from the elongated material  30  and the elongated material  30  is guided through the tube or straw  37 . The tube or straw  37  is thus arranged to prevent the elongated material  30  escaping from the material track  3 ,  5  into the central cavity  11 ,  13 . The tube or straw is made to be removed from the material track  3 ,  5  or to tear or rupture along the length of it such that elongated material may enter the central cavity  11 ,  13 . With such a tube or straw  37 , the body  4  is shaped to block escaping via the opening  32 . 
     The shutter elements  8  are arranged to be positioned in vicinity or on or over the opening  32  of the material track  3 ,  5  such that they substantially block or close the opening  32  of the material track  3 ,  5  along at least part of the length of the material track  3 ,  5 . The shutter elements  8  are arranged to prevent the elongated material escaping from the material track  3 ,  5  to the central cavity  11 ,  13  via the opening  32  along at least part of the opening. The shutter elements  8  further or alternatively are arranged to block at least part of the opening for preventing the elongated material from escaping from the material track  3 ,  5  to the central cavity  11 ,  13  via the opening  32  along at least part of the opening  32 . This means that elongated material cannot exit the material track even when it is pulled or pushed until the opening  32  is opened by removing or dislocating shutter elements. When the shutter elements  8  are located to close at least part of the opening of the material track  3 ,  5  the elongated material may be supported against the shutter elements  8  as it travels in the material track  3 ,  5  and the shutter elements  8  thus guide the elongated material in the material track  3 ,  5  facilitating the feeding of the elongated material. The one or more shutter elements  8  are arranged to be removed from the central cavity  11 ,  13  or to be displaced in the central cavity  11 ,  13  for unblocking or opening the opening  32  of the material track  3 ,  5  and further allowing the elongated material to be released from the material track  3 ,  5  into the central cavity  11 ,  13 . Thus the shutter elements  8  may be used for unblocking and blocking or closing the opening  32  of the material track  3 ,  5 . 
     In the embodiment of  FIGS. 1 to 4  the device can be opened or may be opened for removing the elongated material from the device via the central cavity  11 ,  13 , such that opening the device moves the core element  8  in relation to the material track  3 ,  5  enabling the release of the elongated material from the material track  3 ,  5  as the core element  8  moves away from the opening of the material track  3 ,  5 . Particularly the body  2 ,  4  of the device is formed to be split into at least first body part  2  and second body part  4  for opening the central cavity  11 ,  13  and removing the elongated material from the device via the central cavity  11 ,  13 . 
     The shutter elements of the present invention may further comprise guiding means in order to guide the elongated material in the material track  3 ,  5  during the formation of the knot. The guiding means are preferably arranged to facilitate the travel of the elongated material in the material track  3 ,  5  and enabling different kinds of elongated materials to the used in connection the device. In the embodiment of  FIGS. 1 to 4 , the core element  8  is provided with one or more guiding grooves  9  for guiding the elongated material as it travels along the material track  3 ,  5 . The guiding grooves  9  may be arranged to be placed opposite the opening  32  grooves of the material track  3 ,  5  such that the guiding grooves  9  form part of the material track  3 ,  5 . The guiding grooves  9  facilitate the travelling of the elongated material and prevent the elongated material from getting stuck in the material track  3 ,  5  and from exiting the material track  3 ,  5  during forming the knot. The guiding grooves  9  may extend only locally, as shown in  FIG. 4 , or they may extend around the whole core element  8 . 
     The guide means of the guide elements may also comprise one or more guide rolls  14  for guiding the elongated material in the material track  3 ,  5 . In the embodiment of  FIG. 1  the guide roll  14  has a central axis  16  and it is arranged to rotate freely. In this embodiment the guide roll  14  forms the counter surface for the feed roll  10  and the elongated material is fed between the guide roll  14  and the feed roll  10  into the device by rotating the feed roll  10 . The feed roll  10  and the guide roll  14  together straighten the elongated material and feed it straightened to the material track  3 ,  5  facilitating the travel of the elongated material along the material track  3 ,  5 . The guide roll  14  may be extend through the whole central cavity  11 ,  13  in transversal direction in relation to the material track  3 ,  5 , as shown in  FIG. 1 . Thus the guide roll  14  may guide the elongated material in several locations along the material track  3 ,  5 . In the embodiment of  FIGS. 1 to 4 , the guide roll  14  extends substantially parallel with the feed roll  10  and has substantially same length as the feed roll  10 . Alternatively the guide roll  14  may extend only locally in the central cavity  11 ,  13  such that it guides the elongated material in only one location along the material track  3 ,  5 . 
     The feed roll  10  and/or the guide roll  14  may also comprise grooves (not shown) on the outer surfaces for guiding the elongated material in the location of the rolls  10 ,  14  and preventing the elongated material from escaping from the material track  3 ,  5  when it goes through the gap between the feed roll  10  and the guide roll  14 . Tension may be created between the feed roll  10  and the guide roll  14  which would further prevent the elongated material from escaping the from the material track  3 ,  5 . The tension may be created with spring arrangement or soft roll materials. 
       FIG. 5  shows the schematically cross section of the material track  5  of the second body part  4  of  FIGS. 1 to 4  in which the elongated material  30  travels in the device. The material track  5  comprises an opening  32  open to the central cavity  11 ,  13  and thus the material track  5  is formed as a groove. The core element  8  substantially blocks at least part of the opening  32  along the material track  5  when the device is in closed state. Thus the core element  8  guides the elongated material  30  in the track and prevents it from escaping from the material track  5  to the central cavity  11 ,  13 . In this embodiment the core element  8  is formed to block the material track  3 ,  5  of  FIGS. 1 to 4  along several loops around the central cavity  11 ,  13 . 
       FIG. 6  shows an alternative embodiment, in which the guide means comprises one or more guide flanges  33 ,  34  extending inside the central cavity  11 ,  13 . In this embodiment one guide flange  33 ,  34  is arranged to close the material track  5  along only one loop around the central cavity  11 ,  13 . Alternatively one guide flange  33 ,  34  may also close two or more loops of the material track  3 ,  5  around the central cavity  11 ,  13 . In this embodiment the guide flanges  33 ,  34  may be arranged to extend from the body parts  2 ,  4  of a body that can be split or opened such that the opening  32  is unblocked during opening the central cavity  11 ,  13  for removing the elongated material  30  from the device. This means that the first body part  2  may comprise of the first guide flanges  33 ,  34  and the second body part  4  may comprise of the second guide flanges  33 ,  34 . When the device is in closed state the first guide flanges  33 ,  34  close the material track  5  provided to the second body part  4  and the second guide flanges  33 ,  34  block the material track  3  provided to the first body part  2 . Therefore, the when the device is opened the guide flanges  33 ,  34  move away from the material track  3 ,  5  and the material track  3 ,  5  is unblocked to the central cavity  11 ,  13 .  FIG. 7  further shows an embodiment in which the shutter element comprises a movable shutter wall  35  provided to the body  2 ,  4  and in connection of the material track  3 ,  5  for blocking at least part of the opening  32 . The shutter wall  35  may comprise a connection part for connecting the shutter walls to the elongated material  30  such that the shutter wall  35  may be moved together with the elongated material  30  for blocking the opening  32  during guiding the elongated material along the material track  3 ,  5 . The body  2 ,  4  may be provided with a wall groove  36  extending along the material track  3 ,  5  in connection with the opening  32  and the shutter wall  35  is provided to move in the wall groove  36 . The shutter wall is operatively connected to the feed roll  10  such that the shutter wall  35  may be moved together with the elongated material  30  for blocking the opening  32  during guiding the elongated material along the material track  3 ,  5 . 
     The device of the present invention provides a method for forming a knot to an elongated material. The device for forming the knot comprises a body  2 ,  4 , a central cavity  11 ,  13  inside the body  2 ,  4 , a material track  3 ,  5  along which the elongated material  30  is guided in the device, the material track  3 ,  5  comprising opening  32  extending along the material track  3 ,  5  and open to the central cavity  11 ,  13 . In the method elongated material is first fed into the material track of the device and the elongated material  30 , or at least the beginning front end of the elongated materials moved through the material track  3 ,  5  such that the geometry of the material track  3 ,  5  forms a preformed knot to the elongated material  30 . When the preformed knot is formed, the elongated material is released from the material track  3 ,  5  into the central cavity  11 ,  13  through the opening  32  of the material track  3 ,  5 . Then the elongated material  30  is tightened such that a finished knot is formed to the elongated material  30  from the preformed knot. 
     According to the present invention moving the elongated material  30  further comprises guiding the elongated material  30  along at least part of the material track  3 ,  5  with one or more shutter elements  8 ,  33 ,  34  provided into the central cavity  11 ,  13  and preventing the elongated material from escaping from the material track  3 ,  5  through the opening  32  to the central cavity  11 ,  13  with shutter elements  8 ,  33 ,  34  during guiding the elongated material  30  along at least part of the material track  3 ,  5 . 
     In one embodiment the guiding of the elongated material  30  or preventing the elongated material escaping from the material track  3 ,  5  is carried out by blocking at least part of the opening  32  of the material track  3 ,  5 . In the present invention releasing the elongated material  30  from the material track  3 ,  5  further comprises removing the one or more shutter elements  8 ;  33 ,  34  from the central cavity  11 ,  13  or displacing the one or more shutter elements  8 ;  33 ,  34  in the central cavity  11 ,  13  for unblocking the opening  32  of the material track  3 ,  5  and allowing the elongated material  30  to be released from the material track  3 ,  5  to the central cavity  11 ,  13 . Alternatively or additionally releasing the elongated material  30  from the material track  3 ,  5  further comprises opening the body  2 ,  4  for unblocking the opening  32  of the material track  3 ,  5  and allowing the elongated material  30  to be released from the material track  3 ,  5  in to the central cavity  11 ,  13 . When the shutter elements  8 ,  33 ,  34  are removed or displaced in relation to the material track such that the opening  32  is unblocked, the elongated material  30  which is provided with the preformed knot may be released to the central cavity  11 ,  13  and the elongated material  30  and the preformed knot may be further tightened for tightening and forming finished knot. 
     It will be obvious to a person skilled in the art that, as the technology advances, the inventive concept can be implemented in various ways. The invention and its embodiments are not limited to the examples described above but may vary within the scope of the claims.