Interpenetrating yarn dyeing support

Abstract

The sleeve of the tube-shaped support has holes ( 12 ) which are spaced over the top section ( 5 ) intended to penetrate inside the bottom end section ( 1 ); the external surface of said top section ( 5 ) is provided with longitudinal depressions ( 20 ) between the adjacent holes ( 12 ) aligned longitudinally; it is thus possible to avoid shearing or damage due to pinching of the yarn by the edge ( 1 A) of the bottom end section ( 1 ) of the support when it is fitted onto and slid along the smaller-size section ( 5 ) of an underlying tube-shaped support.

1 . A tube-shaped dyeing support for storing wound yarn, which is made of synthetic material and of the interpenetrating type and the sleeve of which has a bottom end section able to receive the opposite smaller-size section of an underlying support, said sleeve having holes which are spaced and, inside said bottom end section, a stop surface for resting the terminal edge of the opposite end section of a support which can be axially coupled and engaged so as to allow the axial compression and the sliding of the spool of yarn along said smaller-size section, characterized in that at least said smaller-size section ( 5 ) is provided, in its external surface, with longitudinal depressions ( 20 ) between the adjacent holes ( 12 ) aligned longitudinally, so as to avoid possible shearing of the yarn by the edge ( 1 A) of said bottom end section ( 1 ) of the support fitted onto said smaller-size section ( 5 ) of an underlying support, during axial compression and interpenetration of stacked supports.  
     
     
         2 . A dyeing support made of synthetic material, for storing wound yarn, suitable in particular for fine yarn, of the type comprising a sleeve consisting of three sections ( 1 ,  3 ,  5 ), a first section of which ( 1 ) with a greater axial extension being substantially cylindrical or slightly frustoconical and slightly tapered from the larger base ( 1 A), the second middle section ( 3 ) with a limited axial extension being frustoconical, while the third section ( 5 ) thereof is substantially cylindrical with an axial extension greater than the internal stop surface ( 7 ) of the first section, said sleeve having holes ( 9 ,  10 ;  11 ;  12 ) which are spaced and, inside said first section, a stop surface for resting the terminal edge ( 5 ) of the third section ( 5 ) of a support which can be axially coupled and engaged so as to allow axial compression and sliding of the spool of yarn along said third section, characterized in that at least said third section ( 5 ) is provided, in its external surface, with longitudinal depressions ( 20 ) between the adjacent holes ( 12 ) aligned longitudinally, in order to prevent possible shearing of the yarn by the bottom edge ( 1 A) of the support fitted onto said third section ( 5 ) during axial compression and interpenetration of stacked supports.  
     
     
         3 . Support as claimed in  claim 1  or  2 , characterized in that the first section ( 1 ) with greater diametral dimensions of the sleeve has an axial extension of about half the overall length of the support and the third section ( 5 ) with smaller diametral dimensions has an axial extension of not more than one third of the overall length.  
     
     
         4 . Support as claimed in at least one of the preceding claims, characterized in that said smaller-size third section ( 5 ) of the sleeve has, on the external surface, small longitudinal grooves which may also be extended into the middle section ( 3 ).  
     
     
         5 . Support as claimed in at least one of the preceding claims, characterized in that the holes ( 12 ) of said smaller-size third section ( 5 ) arranged in longitudinal rows have the holes of one row staggered with respect to those of the adjacent rows.  
     
     
         6 . Support as claimed in at least one of the preceding claims, characterized in that the internal stop surface is formed by a step ( 7 ).  
     
     
         7 . Interpenetrating dyeing support, all of which as described and shown in the accompanying drawing.