Multi-elastic belt and its manufacturing method

Abstract

The knitted belt ( 1 ) according to the invention comprises regions ( 4 - 8 ) having a different elasticity over the circumference thereof, wherein some of the regions ( 5, 6 ) corresponding to relatively hollow regions ( 13, 11 ) of a user's waist have a maximum level of local elasticity, in particular in a central back region ( 6 ) and two lateral front regions ( 5 ) corresponding respectively to the spine and to the tendons linking the wearer's rectus abdominis with the external oblique muscles.

1 . A method for constructing a belt with areas of differentiated elasticity along its circumference, comprising:
 determining on a wearer's waist, relatively hollow areas compared to relatively solid areas and   constructing the belt by providing, at these hollow areas, an area of the belt having a local maximum of elasticity.   
     
     
         2 . The method according to  claim 1 , wherein the hollow areas are mainly located at a back, along a vertebral column, and at tendons joining between rectus abdominis muscles and external oblique muscles of a wearer. 
     
     
         3 . The method according to  claim 1 , further comprising, in order to provide an elasticity that is differentiated by areas, knitting of the belt by varying the structure of the stitch and/or the type of the used yarns depending on the areas. 
     
     
         4 . The method according to  claim 1 , further comprising, in order to provide an elasticity that is differentiated by areas, apertured knitting of the belt, by varying the size of the apertures, depending on the areas. 
     
     
         5 . The method according to  claim 1 , further comprising, in order to provide an elasticity that is differentiated by areas, burning-out of an elastane yarn of the belt depending on the areas. 
     
     
         6 . The method according to  claim 1 ,  further comprising, in order to provide an elasticity that is differentiated by areas, differentiated printing of resin-type, silicone-type polymers, depending on the areas. 
     
     
         7 . The method according to  claim 6 , further comprising printing similar patterns along the belt, but with a tighter printing in the areas that require a greater elasticity. 
     
     
         8 . The method according to  claim 7 , wherein the patterns consist of letters. 
     
     
         9 . The method according to  claim 1 , wherein the belt is knitted at the same time as a garment or an underwear. 
     
     
         10 . A belt intended for a wearer, comprising:
 areas of different elasticities along a circumference, some areas having a local maximum of elasticity,   wherein said areas with local maximum of elasticity correspond to relatively hollow areas of the waist of a wearer.   
     
     
         11 . The belt according to  claim 9 , wherein said areas with local maximum of elasticity comprise at least one central back area and two lateral front areas respectively corresponding, on the one hand, to vertebral column and, on the other hand, to tendons joining between rectus abdominis muscles and external oblique muscles of a wearer.