Abstract:
A frame ( 2 ) for framing a picture/an artwork ( 4 ) having a periphery ( 8 ) is disclosed. The frame ( 2 ) comprises a contact surface ( 10 ) provided at the inside ( 12 ) of the frame, which frame ( 2 ) comprises an opening ( 14 ), through which the picture/artwork ( 4 ) is mountable. At least one flexible member ( 6, 6′, 6″, 6′″ ) extends along at least a portion of the contact surface ( 10 ). The at least one flexible member ( 6, 6′, 6″, 6′″ ) is provided in such a manner that the flexible member ( 6, 6′, 6″, 6′″ ) is configured to securely maintain the picture/artwork ( 4 ) within the frame ( 2 ) by means of a compression force (F 1 ) and/or a friction force (F 2 ) between the at least one flexible member ( 6, 6′, 6″, 6′″ ) and the periphery ( 8 ). The flexible member ( 6, 6′, 6″, 6′″ ) is compressible. The flexible member ( 6, 6′, 6″, 6′″ ) is attached to the frame ( 2 ) in such a manner that the flexible member ( 6, 6′, 6″, 6′″ ) is restricted from being moved along the width (axis X) of the contact face ( 10 ).

Description:
FIELD OF INVENTION 
       [0001]    The present invention relates to a frame for framing pictures/artworks, such as photographs, posters and canvases. 
       PRIOR ART 
       [0002]    When mounting a picture/artwork into a frame it is possible to apply so-called floater frames which create the illusion that the artwork is “floating” within the frame instead of being covered by it. The “floating illusion” is created by providing a gap between the frame and the edge of the picture/artwork. Typically, a floater frame comprises four L-profiles joined together at the corners of the frame. 
         [0003]    The picture/artwork is attached to the back portion of the frame in a manner in which the attachment is not visible from the front side of the frame. It is extremely difficult to mount a picture/artwork in a perfect symmetrical way due to the fact that the person mounting the image has no visual inspection of the front during the mounting process. 
         [0004]    Furthermore, successful use of the prior art floater frames requires that the frames and the picture/artwork are a perfect fit. Moreover, it is time-consuming and difficult to mount a picture/an artwork in prior art floater frames which are also rather heavy. 
         [0005]    US 2003/0046849 A discloses a carrier frame comprising L-shaped frame members. A plurality of displaceable structures are provided at the inside portion of the frame. This structure is adapted to press against a picture/artwork and hereby generate a force to keep the picture/artwork in place within the frame. In order to mount a picture/artwork in the frame, the plurality of displaceable structures at each frame member must be displaced at the same time. This is very difficult in practice. Moreover, the picture/artwork can only be mounted to the frame from one side. 
         [0006]    Thus, there is a need for a frame which enables an easier and more user-friendly mounting of a picture/an artwork and which reduces or even eliminates the above-mentioned disadvantages of the prior art. 
         [0007]    Accordingly, it is an object of the present invention to provide a frame that is easy and fast to use for the purpose of mounting a picture/artwork. 
         [0008]    Moreover, it is an object of the present invention to provide a frame in which it is possible to mount a picture/an artwork from both sides of the frame. 
         [0009]    Furthermore, it is an object of the present invention to provide a frame adapted to fit pictures of different thicknesses and sizes. 
         [0010]    It is also an object of the present invention to provide a frame that is lighter than the prior art floater frames. 
       SUMMARY OF THE INVENTION 
       [0011]    The object of the present invention can be achieved by a frame as defined in claim  1 . Preferred embodiments are defined in the dependent sub claims, explained in the following description and illustrated in the accompanying drawings. 
         [0012]    The frame according to the invention is a frame for framing a picture/an artwork having a periphery, which frame comprises a contact surface provided at the inside of the frame, which frame comprises an opening through which the picture/artwork is mountable, wherein at least one flexible member extends along at least a portion of the contact surface, where the at least one flexible member is provided in such a manner that the flexible member is configured to securely maintain the picture/artwork within the frame by means of a compression force and/or a friction force provided between the at least one flexible member and the periphery, wherein the flexible member is attached to the frame in such a manner that the flexible member is restricted from being moved along the width of the contact face. 
         [0013]    Hereby, it is possible to provide a frame that is easy and fast to use for the purpose of mounting a picture/an artwork. 
         [0014]    Furthermore, the invention makes it possible to provide a frame adapted to fit pictures of different thicknesses and sizes. 
         [0015]    Moreover, it is possible to provide a simpler and lighter frame than the prior art floater frames. 
         [0016]    The invention makes it possible to frame a picture/an artwork in a manner in which the picture/artwork is centrally positioned within the frame. 
         [0017]    Since the flexible member is attached to the frame in such a manner that the flexible member is restricted from being moved along the width (axis X) of the contact face, the position of the picture/artwork may be adjusted along the width of the frame members (along the axis X in  FIG. 2 ) in a manner in which the flexible member is kept attached to the frame. 
         [0018]    Accordingly, the picture/artwork can be positioned in such a manner that the front side of the frame and of the picture/artwork are aligned in order to create the illusion that the picture/artwork is “floating” within the frame. It is also possible to mount the picture/artwork deeper within the frame in order to be able to mount a glass plate in front of the picture/artwork. 
         [0019]    In case that the frame is wider than the picture/artwork, the picture/artwork may be arranged between the back side and the front side periphery of the frame in order to protect the picture/artwork during transportation or storage. In that way, adjacent pictures/artworks are prevented from getting into direct contact with each other. 
         [0020]    The at least one flexible member also protects the picture/artwork if the frame is accidently dropped as the flexible member may be shock-absorbing and thus may reduce or eliminate damage to the picture/artwork. 
         [0021]    Furthermore, the frame according to the invention is easy to reuse due to its simplicity and user-friendliness. 
         [0022]    By the term picture/artwork is meant an object to be framed. Such object may be a canvas, a photograph, a poster, a plate with a self-made motif or a three-dimensional work of art. 
         [0023]    The contact surface is the part of the frame facing the picture/artwork and to which the flexible member is attached. 
         [0024]    The flexible member may cover the contact surface in part or completely. 
         [0025]    The flexible member is compressible to such an extent that it can adapt to fit (small) variations in the contact surface of the frame or the periphery of the picture/artwork. 
         [0026]    In a preferred embodiment according to the invention the flexible member creates a gap of approximately 5 mm between the inside of the frame members and the periphery of the picture/artwork. The flexible member is configured to exert a radial force (and thus a pressure) or a friction force against the picture/artwork in that way maintaining the picture/artwork in its position within the frame. 
         [0027]    Small variations (notches and protrusions) may be within e.g. 0.1-15 mm, such as 0.2-5 mm for small pictures (e.g. pictures of 20 cm×20 cm); whereas small variations may be e.g. 1-20 mm such as e.g. 2 -10 mm for large pictures (e.g. 100 cm×100 cm). The flexible member may fit the frame and the picture even if small variations are present. 
         [0028]    Loaded conditions are present when a force is exerted against the flexible member, while unloaded conditions are present when no force is applied. 
         [0029]    It may be an advantage that the frame is constructed in such a manner that the picture/artwork can be mounted from both sides of the opening. 
         [0030]    It may be possible to apply both sides of the frame, and one can turn the frame in order to change the colour or visual expression of the frame. 
         [0031]    It may be advantageous that a groove is provided in at least a portion of the contact surface. 
         [0032]    Hereby, it is possible to attach the flexible member in the groove. Accordingly, a simple and reliable attachment may be achieved. 
         [0033]    It may be beneficial that a protrusion is provided in at least a portion of the contact surface. It is possible to attach the flexible member by means of the protrusion. 
         [0034]    It may be an advantage that the frame comprises a number of frame members, and that the at least one flexible member is attached to one or more (preferably all) of the frame members by means of a groove and/or a protrusion of a frame member. 
         [0035]    Hereby, it is easy to ensure an accurate position of the at least one flexible member on the contact surface. Further, it is easy to attach or replace the flexible member. 
         [0036]    It may be an advantage that the contact surface is plane and that the at least one flexible member is attached to the contact surface by means of fastening elements such as glue, nails, screws or staples. 
         [0037]    Hereby, a reliable and solid attachment of the frame member and the at least one flexible member is achieved. The joint is capable of resisting a force of a certain magnitude. 
         [0038]    The flexible member, which may be a rubber band, may be configured to absorb impact in case the picture/artwork is exposed to mechanical stress e.g. if the picture is accidently dropped on the floor. 
         [0039]    It may be an advantage that the at least one flexible member is adapted to fit irregularities or unevenness of the frame and/or the picture/artwork. 
         [0040]    Hereby, the frame may be used even if irregularities or unevenness are present on the frame and/or the picture/artwork. A smooth transition between the frame and the picture can be achieved. 
         [0041]    Irregularities or unevenness may be small variations (notches and protrusions) between e.g. 0.1-15 mm, such as 0.2-5 mm for small pictures (e.g. pictures of 20 cm×20 cm). The flexible member may be configured to fit a picture or a frame with even larger variations of e.g. 1-20 mm, such as 2-10 mm if the picture is large (e.g. 100 cm× 100  cm). Irregularities or unevenness may be present in the corner structures on a canvas 
         [0042]    It may be advantageous that the at least one flexible member extends basically along the entire width (along the axis X) of the contact surface of the frame member. 
         [0043]    Hereby, it is possible to adjust the position of the picture/artwork along the entire width of the frame members. This solution is flexible and user-friendly. 
         [0044]    A frame according to the invention may be used to frame two pictures/artworks at the same time. One picture/artwork may be mounted from one side of the frame while another picture/artwork may be mounted from the other side of the frame. Accordingly, one can have access to another image just by turning the frame if it is mounted on a wall. If the frame is hanging from a ceiling it is possible to display two pictures/artworks at the same time by means of the frame according to the invention. 
         [0045]    It may be an advantage that two parallel flexible members extend along the contact surface of each frame member. 
         [0046]    Hereby, it is possible to adjust the position of the picture/artwork along the width of the frame members. Furthermore, it is possible to apply two different materials with different mechanical properties or to use flexible members of different colours. 
         [0047]    It may be advantageous that the flexible member is compressible to such an extent that the thickness of the flexible member can be reduced to less than 80% of the thickness of the flexible member in an unloaded condition. 
         [0048]    Hereby, the flexible member may “level out” or fit the unevenness of the contact surface of the frame or of the periphery of the picture/artwork. 
         [0049]    It may be beneficial that at least one flexible member does not extend along the entire length (along the axis Y) of one or more of the frame members. The flexible member may by way of example be positioned on the central portion of the frame members and extend along about half the length of the frame members. 
         [0050]    Hereby, it is possible to reduce costs by reducing the use of flexible members. Moreover, it may be easier to mount and dismount the picture/artwork from the frame. Furthermore, it is possible to create an effect by providing a gap between the frame and the periphery of the picture/artwork. 
         [0051]    It may be an advantage that the frame comprises a flexible member attached to the frame, where the flexible member is a one-piece body. 
         [0052]    Hereby, it is possible to provide a simple solution that is easy to mount e.g. in a groove structure. It is possible to conceal the arched portions of the flexible member that will present in the corner regions. 
         [0053]    It may be beneficial that at the flexible member is an elastic band e.g. a rubber band. 
         [0054]    The use of an elastic rubber band may be combined with the use of a groove structure with a corresponding geometry (adapted to receive and maintain the rubber band). Rubber bands may be provided in any required thickness, width and quality. 
         [0055]    It may be beneficial that the flexible member has a uniform cross section. 
         [0056]    Hereby, it is easier to mount the flexible member in a groove extending along the length of the frame members. 
         [0057]    It may be an advantage that the flexible member is at least partly attached to the frame by means of press fit. Accordingly, the flexible member can be attached to the frame in a fast and easy manner. Press fit may be combined with use of other fastening means such as glue by way of example. 
     
    
     
       DESCRIPTION OF THE DRAWINGS 
         [0058]    The invention will become more fully understood from the detailed description given herein below. The accompanying drawings are given by way of illustration only, and thus, they are not limitative of the present invention. In the accompanying drawings: 
           [0059]      FIG. 1  shows schematic views of a frame according to the invention; 
           [0060]      FIG. 2  schematically shows different views of a frame member provided with a groove; 
           [0061]      FIG. 3  shows different frame members according to the invention; 
           [0062]      FIG. 4  shows a frame member provided with a barbed protrusion; 
           [0063]      FIG. 5  shows different embodiments of a frame according to the invention; 
           [0064]      FIG. 6  shows a frame in which the flexible member does not extend along the total length of the frame members: 
           [0065]      FIG. 7  shows two frame members with flexible members during loaded and unloaded conditions 
           [0066]      FIG. 8  illustrates a number of different frame members according to the invention and 
           [0067]      FIG. 9  illustrates two additional frame members according to the invention. 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0068]    The detailed description set forth below in connection with the appended drawings is intended as a description of various configurations. The detailed description includes specific details for the purpose of providing a thorough understanding of various concepts. However, it will be apparent to those skilled in the art that these concepts may be practiced without these specific details. In the following, identical or corresponding elements will have the same reference numbers. 
         [0069]      FIG. 1  A illustrates a square frame  2  comprising four frame members  18 ,  18 ′,  18 ″,  18 ′″. One flexible member  6 ,  6 ′,  6 ″,  6 ′″ is attached to each of the frame members  18 ,  18 ′,  18 ″,  18 ′″. The flexible members  6 ,  6 ′,  6 ″,  6 ′″ extend along the entire length of the frame member  18 ,  18 ′,  18 ″,  18 ′ to which they are attached. 
         [0070]    A picture/an artwork  4  is mounted in the frame  2 . The four flexible member  6 ,  6 ′,  6 ″,  6 ′″ are compressed by the picture/artwork  4 . Hereby, a force F 1  is exerted towards the picture/artwork  4 . The force F 1  is capable of maintaining the picture/artwork  4  within the frame  2 . 
         [0071]      FIG. 1B  illustrates how to insert a flexible member  6 ′ to the contact surface of the inside  12  of the frame  2 . When the flexible member  6 ′ has been attached to the contact surface of the inside  12  of the frame  2 , the flexible member  6 ′ extends along the entire length of the inside  12  of the frame member  18 ′. 
         [0072]      FIG. 1  C illustrates how a flexible member  6 ′ can exert a force F 1  radially and/or a friction force F 2  axially to the periphery  8  of the picture/artwork  4 , respectively, when the picture/artwork has been mounted within the frame  2  through its opening  14 . 
         [0073]    The force F 1  secures that the picture/artwork  4  is kept in the central area within the frame  2 . Thus, the force F 1  secures the position of the picture/artwork  4  along the length of the frame members of the frame  2 . The force F 2  secures that the picture/artwork  4  is kept in place and thus is not displaced out of the frame  2 . The thickness T of flexible member  6 ′ is indicated in  FIG. 1  C. 
         [0074]      FIG. 2  A illustrates an embodiment of a frame member  18  according to the invention. The frame member  18  comprises a flexible member  6  which does not cover the entire contact surface  10  (along the axis X). The flexible member  6  is attached to the frame member  18 . The flexible member  6  is shaped with an arched profile  24 . The arched profile  24  extends along the contact surface  10  and is configured to receive and abut the periphery of the picture/artwork to be framed by means of a frame comprising the frame member  18 . The contact surface  22  between the flexible member  6  and the frame member  18  is plane and smooth. 
         [0075]      FIG. 2  B,  FIG. 2  C and  FIG. 2  D illustrate a cross-sectional view of a frame member  18  joint with a flexible member  6  by means of a groove  16  provided in the frame member  18  (see  FIG. 2  D). 
         [0076]    The flexible member  6  is provided with a protrusion  20  (see  FIG. 2  C) fit and shaped to be received by the groove  16 . It may be an advantage to provide a protrusion  20  that is slightly larger (e.g. 0.1-5 mm) than the groove  16  in order to secure the most optimal fit between the protrusion  20  and the groove  16 . 
         [0077]      FIG. 3  A illustrates a frame member  18  provided with two parallel flexible member  6 ,  6 ′ attached to the frame member  18  by means of two parallel grooves  16 ,  16 ′. 
         [0078]      FIG. 3  B illustrates a frame  18  provided with a flexible member  6  having an arched upper surface. The flexible member  6  extends along the entire axis X (width) of the frame member  18 . Accordingly, the flexible member  6  covers the entire contact surface  10  of the frame member  18 . The flexible member  6  is provided with a protrusion that is received by a corresponding groove provided in the frame member  18 . 
         [0079]      FIG. 3  C illustrates a frame member  18  comprising a flexible member  6  with a rectangular shape. The flexible member  6  extends along the entire width (along the axis X) of the frame member  18 . The flexible member  6  is provided with a protrusion that is received by a corresponding groove provided in the frame member  18 . 
         [0080]      FIG. 4  A and  FIG. 4  B illustrate a frame member  18  provided with a barbed protrusion  26 . The protrusion  26  is provided with barbs  30 ,  30 ′ and is arranged centrally at the contact surface  10  of the frame member  18 . The flexible member  6  is attached to the barbed protrusion  26 . The barbs  30 ,  30 ′ improve the fixation of the flexible member  6  and the protrusion  26 . The flexible member may be provided with another geometry fit to be received by the protrusion  26 . 
         [0081]      FIG. 5  A,  FIG. 5  B and  FIG. 5  C illustrate differently shaped frames  2 . All three embodiments comprise at least one frame member  18  and at least one flexible member  6 .  FIG. 5  A illustrates a circular frame  2 ,  FIG. 5  B illustrates a hexagonal frame  2 , while  FIG. 5  C illustrates an oval frame  2 . 
         [0082]      FIG. 6  illustrates a frame  2  according to the invention. The frame  2  comprises four flexible members  6 ,  6 ′,  6 ″,  6 ′″. Three of the flexible members  6 ,  6 ″,  6 ′″ do not extend along the entire length of the frame members  18 ,  18 ″,  18 ′″ to which they are attached. Even though these flexible members  6 ,  6 ″,  6 ′″ do not extend along the entire length of the frame members  18 ,  18 ″,  18 ′″, they are capable of maintaining the picture/artwork  4  firmly within the frame  2 . 
         [0083]      FIG. 7  A illustrates a first frame member  18  of a frame according to the invention. The first frame member  18  has a rectangular cross-sectional area; A groove is provided in the central portion of the contact surface  10  of the frame member  18 . 
         [0084]    A flexible member  6  (e.g. a rubber band) is attached to the groove of the frame member  18 . The flexible member  6  extends to the first edge  32  of the frame member  18 . The flexible member  6  does not extend to the second edge  34  of the frame member  18 .  FIG. 7  A shows that the flexible member  6  does not extend along the entire width  36  of the frame member  18 . The flexible member  6  is unloaded (no force is applied to it) and the thickness of the part of the flexible member provided above the contact surface  10  is T 2 . 
         [0085]      FIG. 7  B illustrates the frame member  18  shown in  FIG. 7  A. The flexible member  6  of the frame member  18  is shown in a loaded condition (a force is applied to it). Accordingly, the thickness of the part of the flexible member  6  that is provided above the contact surface  10  is T 1 . The part of the flexible member  6  provided above the contact surface  10  is compressed to such an extent that its thickness T 1  is reduced significantly (with approximately 50%) compared with the thickness T 2  during unloaded conditions (see  FIG. 7  A). 
         [0086]    The scenario illustrated in  FIG. 7  B will occur when a picture/artwork is arranged in a frame provided with the illustrated frame members  18 . 
         [0087]    The periphery of the picture/artwork will compress the flexible member  6  and thus reduce the thickness T 1  of the flexible member  6 . 
         [0088]      FIG. 7  C illustrates a frame member  18 ′ corresponding to the one illustrated in FIG. A and  FIG. 7  B. The frame member  18 ′ is provided with a groove into which groove a flexible member  6 ′ is attached. The flexible member is unloaded (no forces is applied to it). The thickness of the part of the flexible member provided above the contact surface  10 ′ is T 4 . 
         [0089]    The frame member  18 ′ has a rectangular, cross-sectional area. A groove is provided in the central portion of the contact surface  10 ′ of the frame member  18 ′. 
         [0090]    The flexible member  6 ′ extends to the first edge  32  of the frame member  18 ′. The flexible member  6 ′ does not extend to the second edge  34  of the frame member  18 ′.  FIG. 7  C shows that the flexible member  6 ′ does not extend along the entire width  36  of the frame member  18 ′. 
         [0091]      FIG. 7  D illustrates the frame member  18 ′ shown in  FIG. 7  C. The flexible member  6 ′ of the frame member  18 ′ is shown in a loaded condition (a force is applied to it). Accordingly, the thickness of the part of the flexible member  6 ′ provided above the contact surface  10 ′ is T 3 . 
         [0092]    The part of the flexible member  6 ′ provided above the contact surface  10 ′ is compressed to such an extent that its thickness T 3  is reduced significantly (with approximately 50%) compared with the thickness T 4  during unloaded conditions (see  FIG. 7  C). 
         [0093]    The scenario illustrated in  FIG. 7  D will occur when a picture/artwork is arranged in a frame provided with the illustrated frame members  18 ′. 
         [0094]    The periphery of the picture/artwork will compress the flexible member  6 ′ and thus reduce the thickness T 3  of the flexible member  6 ′. 
         [0095]      FIG. 8  illustrates a number of different frame members  18  according to the invention. 
         [0096]      FIG. 8  A illustrates a frame member  18  having a square cross section. A flexible member  6  having a basically rectangular cross section is attached to the contact surface  10  of the frame member  18 . The flexible member  6  extends along the entire width  36  of the frame member  18 . 
         [0097]      FIG. 8  B illustrates a frame member  18  having a rectangular cross section. A flexible member  6  having a rectangular cross section is attached to the contact surface  10  of the frame member  18 . The flexible member  6  extends along the main portion (approximately 85%) of the width  36  of the frame member  18 . 
         [0098]      FIG. 8  C illustrates a frame member  18  having a rectangular cross section. A flexible member  6  having an arced profile is attached to the contact surface  10  of the frame member  18 . The flexible member  6  extends along the main portion (approximately 80%) of the width  36  of the frame member  18 . 
         [0099]      FIG. 8  D illustrates a frame member  18  having a rectangular cross section. A flexible member  6  having an arced profile is attached to the contact surface  10  of the frame member  18 . The flexible member  6  extends along the entire width  36  of the frame member  18 . 
         [0100]      FIG. 8  E illustrates a frame member  18  having a rectangular cross section. A hollow flexible member  6  having a rectangular cross section is provided with a cavity  40  is attached to the contact surface  10  of the frame member  18 . The flexible member  6  extends along the main portion (approximately 80%) of the width  36  of the frame member  18 . 
         [0101]      FIG. 8  F illustrates a frame member  18  having a rectangular cross section. A flexible member  6  having a rectangular cross section is attached to the contact surface  10  of the frame member  18  by means of two portions of glue  38 ,  38 ′. The flexible member  6  extends along the main portion (approximately 80%) of the width  36  of the frame member  18 . 
         [0102]      FIG. 8  G illustrates a frame member  18  having a rectangular cross section. A flexible member  6  having a rectangular cross section is attached to the contact surface  10  of the frame member  18  by means of one large portion of glue  38 . The flexible member  6  extends along the main portion (approximately 80%) of the width  36  of the frame member  18 . 
         [0103]      FIG. 9  A illustrates a frame member  18  having a rectangular cross section. The frame member  18  is provided with a groove  16  having a semi-circular cross section. A flexible member  6  having a circular cross section is provided above the groove  16  and above the contact surface  10  of the frame member  18 . The flexible member  6  is shaped to be received by the groove  16  provided within the frame member  18 . Glue may be used to attach the flexible member  6  to the frame member  18 . 
         [0104]      FIG. 9  B illustrates a frame member  18  having a rectangular cross section. The frame member  18  is provided with a groove  16  having a semi-circular cross section. A flexible member  6  having a rectangular cross section is provided with a protrusion  20  having a semi-circular cross section. The flexible member  6  is provided above the groove  16  and above the contact surface  10  of the frame member  18 . The protrusion  20  of the flexible member  6  is shaped to be received by the groove  16  provided within the frame member  18 . Glue may be used to attach the flexible member  6  to the frame member  18 . 
       LIST OF REFERENCE NUMERALS 
       [0105]      2  Frame 
         [0106]      4  Picture/artwork 
         [0107]      6 ,  6 ′,  6 ″,  6 ′″ Flexible member 
         [0108]      8  Periphery 
         [0109]      10 ,  10 ′ Contact surface 
         [0110]      12  Inside (of the frame) 
         [0111]      14  Opening 
         [0112]      16  Groove 
         [0113]      18 ,  18 ′,  18 ″,  18 ′″ Frame member 
         [0114]      20  Protrusion 
         [0115]      22  Contact surface 
         [0116]      24  Arced profile 
         [0117]      26  Protrusion 
         [0118]      28  Groove 
         [0119]      30 ,  30 ′ Barb 
         [0120]      32 ,  34  Edge 
         [0121]      36  Width 
         [0122]      38 ,  38 ′ Glue/adhesive 
         [0123]      40  Cavity 
         [0124]    B Width 
         [0125]    b Width 
         [0126]    F 1  Force 
         [0127]    F 2  Friction force 
         [0128]    T, T 1 , T 2 , T 3 , T 4  Thickness 
         [0129]    X Axis 
         [0130]    Y Axis