Shoe inner sole

Abstract

The invention relates to an inner or inlay sole ( 2 ) for a shoe, in particular a sports shoe, which permits optimal damping properties and optimal wearing comfort. The above inner sole ( 2 ) is constructed in an integral manner from a flexible material and comprises blisters ( 6 ). According to a preferred embodiment, the blisters ( 6 ) are hollow in form in order to meet the requirement particularly well. According to a further embodiment, perforations ( 20 ) are provided in the region between the blisters and/or in the blisters themselves, for the optimisation of the damping properties and for removing fluids from the foot of the user. A combination of the two embodiments is particularly advantageous.

I claim:  
     
         1 . An inner sole ( 2 ) for a shoe with a sole base ( 4 ) and a number of blisters ( 6 ) which extend away from the sole base ( 4 ), are formed integrally with the sole base ( 4 ) and have a hollow space ( 8 ) in their interior.  
     
     
         2 . An inner sole ( 2 ) for a shoe with a sole base ( 4 ) and a number of blisters ( 6 ) which extend away from the sole base ( 4 ) and are formed integrally with it, perforations ( 18 ,  20 ) being provided in a region between the blisters ( 6 ) and/or in the blisters ( 6 ).  
     
     
         3 . An inner sole ( 2 ) which is formed as a combination of claims  1  and  2 .  
     
     
         4 . The inner sole ( 2 ) as claimed in one of  claims 1  to  3 , the blisters ( 6 ) having a substantially cylindrical base portion and a dome-shaped end portion adjoining the latter.  
     
     
         5 . The inner sole ( 2 ) as claimed in one of  claims 2  to  4 , the perforations ( 18 ,  20 ) being formed for removing fluid and/or moisture through the inner sole ( 2 ).  
     
     
         6 . The inner sole ( 2 ) as claimed in  claim 4  or  5 , the perforations ( 20 ) being formed in the dome-shaped end portion of the blisters ( 6 ), preferably at its tip.  
     
     
         7 . The inner sole ( 2 ) as claimed in one of  claims 1  to  6 , the blisters ( 6 ) being formed from a flexible, elastically compressible material.  
     
     
         8 . The inner sole ( 2 ) as claimed in one of  claims 2  to  7 , the blisters ( 6 ) being formed from a material which is flexible enough for them to be elastically compressible in order to transfer fluid from an upper side ( 10 ) of the sole to an underside ( 5 ) of  
     
     
         9 . The inner sole ( 2 ) as claimed in one of  claims 1  to  8 , the blisters ( 6 ) being formed in different sizes and/or shapes in different regions ( 12 ,  16 ) of the inner sole ( 2 ).  
     
     
         10 . The inner sole ( 2 ) as claimed in one of  claims 1  to  9 , a breathable and/or moisture-permeable layer ( 26 ) being provided on a surface ( 10 ) of the inner sole ( 2 ) facing away from the blisters ( 6 ).  
     
     
         11 . The inner sole ( 2 ) as claimed in  claim 10 , the layer ( 26 ) being formed from a knitted fabric, nonwoven, cotton or polyester, preferably from a knitted spacer fabric knitted from a single yarn, the material of the layer ( 26 ) preferably having an antibacterial additive.  
     
     
         12 . The inner sole ( 2 ) as claimed in  claim 10  or  11 , the layer ( 26 ) being adhesively bonded onto the surface ( 10 ).  
     
     
         13 . The inner sole ( 2 ) as claimed in one of  claims 1  to  12 , which is formed from an elastomer, latex, natural or synthetic rubber, preferably a thermoplastic rubber (TPR), block copolymer or thermoelastic, the material preferably having an antibacterial additive.  
     
     
         14 . The inner sole ( 2 ) as claimed in one of  claims 1  to  13 , the material forming the inner sole ( 2 ) having a Shore A hardness of 35 to 60, preferably of 40 to 55 and particularly preferably of about 40, 50 and/or  55 .  
     
     
         15 . The inner sole ( 2 ) as claimed in one of  claims 1  to  14 , the blisters ( 6 ) being formed substantially over the entire inner sole ( 2 ).  
     
     
         16 . A sole construction with an outer sole, an inner sole ( 2 ) as claimed in one of  claims 1  to  15  and a layer for moisture absorption provided between the outer sole and the inner sole ( 2 ).  
     
     
         17 . The sole construction as claimed in  claim 16 , the moisture-absorbing layer also being formed as a damping element.  
     
     
         18 . The sole construction as claimed in  claim 16  or  17 , the inner sole ( 2 ) lying loosely on the outer sole.  
     
     
         19 . A shoe with a sole construction as claimed in one of  claims 16  to  18  and an upper, the inner sole ( 2 ) being connected, preferably adhesively bonded, to the upper at least over certain portions at its periphery.  
     
     
         20 . A process for producing an inner sole ( 2 ) as claimed in one of claims  1  and  3  to  15  with the steps of: 
 (a) preparing a mold with a recess for forming the sole base ( 4 ) and the blisters ( 6 ), the recess having a number of projections on a first area and appropriately corresponding clearances for forming the hollow spaces ( 8 ) on a second area lying opposite;  
 (b) preparing a flexible elastic material;  
 (c) introducing the material into the mold and forming the sole base ( 4 ) and the blisters ( 6 ) as an integral element; and  
 (d) removing the inner sole ( 2 ) from the mold.  
 
     
     
         21 . A process for producing an inner sole ( 2 ) as claimed in one of  claims 2  to  15  with the steps of: 
 (a) preparing a mold with a recess for forming the sole base ( 4 ) and the blisters ( 6 ), the recess having a number of connecting webs between a first area of the recess and a second area of the recess lying opposite for forming the between the blisters and/or in the blisters ( 6 );  
 (b) preparing a flexible elastic material;  
 (c) introducing the material into the mold and forming the sole base ( 4 ) and the blisters ( 6 ) as an integral element; and  
 (d) removing the inner sole ( 2 ) from the mold.  
 
     
     
         22 . A process for producing an inner sole ( 2 ) as claimed in one of  claims 3  to  15  which is a combination of the processes as claimed in claims  20  and  21 .  
     
     
         23 . The process as claimed in one of  claims 20  to  22 , the mold being constructed in at least two parts and being opened for the removal of the inner sole ( 2 ).  
     
     
         24 . The process as claimed in one of  claims 20  to  23 , a breathable and/or fluid-permeable layer being applied, preferably adhesively bonded, to the upper side ( 10 ) of the inner sole ( 2 ).  
     
     
         25 . The process as claimed in one of  claims 20  to  24 , the inner sole ( 2 ) being integrally formed from different materials in individual portions, the different materials being introduced substantially together during the introduction step c).