Spool, yarn twisting process and yarn twisting machine

Abstract

A spool of yarn of natural, synthetic or artificial textile fibres, with the torsion value of the plied yarn (α) throughout the spool (1) being variable, and being associated with the instantaneous winding/unwinding diameter (DI) of the spool (1), equal to α (tpm)=1/(DI*π) such that, on unwinding the yarn as twisted in a first direction N-S, the torsion value of the yarn, once unwound as twisted (β) is constant throughout the spool and is essentially equivalent to 0 tpm, and such that, on unwinding the yarn as twisted in a second direction S-N, opposite to the first direction, the torsion value of the yarn, once unwound as twisted (β), is variable throughout the spool and is equivalent to β′ (tpm)=2/(DI*π). Process for the generation of the spool disclosed, and yarn twisting machine for the generation of the spool disclosed.

1 . A spool of yarn of natural or artificial textile fibers characterized in that the twist value of the rolled yarn (α) along the full spool (1) is variable and is associated to the winding/unwinding instant diameter (ID) of the spool (1) itself and is equivalent to:
   α (tpm)=1/(ID* TT )
 
 so that, when the yarn is scutched at “de filé” in a first N-S direction, the value of the yarn twist after being scutched at “de filé” (ß) is constant along the full spool and is essentially equivalent to 0 tpm
   ß (tpm)=0
 
 
 and so that, when the yarn is scutched at “de filé” in a second S-N direction, opposite to the first direction, the value of the yarn twist after being scutched at “de filé” (ß′) is variable along the full spool and is equivalent to:
   ß (tpm)=2/(ID( m )* TT ).
 
 
 
     
     
         2 . A yarn twisting process characterized in that it comprises:
 Yarn twisting (H) by twisting means that apply a twist (Ω) associated to the winding/unwinding instant diameter (ID) of the spool itself (1); and   Rolling the yarn (H) on a pickup spool (1);   so that the value of the twist of the rolled yarn (α) along the full pickup spool (1) is variable and is associated to the winding/unwinding instant diameter (ID) of the spool itself (1) and is equivalent to:
   α (tpm)=1/(ID* TT ).
 
   
     
     
         3 . A yarn twisting machine, characterized in that it comprises
 a yarn (H) delivery spool (2),   twisting means that apply a twist to the yarn (Ω),   a yarn (H) pickup spool (1) with a twist value of the rolled yarn (α)   means to know the instant diameter (ID) of the pickup spool (1)   means to modify the twist applied to the yarn (Ω) in the machine twisting means so that the twist value of the rolled yarn (α) along the full pickup spool (1) is variable and is associated to the winding/unwinding instant diameter (ID) of the pickup spool (1) itself and is equivalent to:
   α (tpm)=1/(ID* TT ).
 
   
     
     
         4 . The yarn twisting machine according to the  claim 3 , characterized in that the twisting machine is a ring machine that comprises
 a yarn (H) delivery spool (2) at 0 twist that is unwound in yarn at “de roulé”,   twisting means that apply a twist to the yarn (Ω) in the S direction,   a pickup spool (1) of yarn (H) with a twist value of the rolled yarn (α)   means to know the instant diameter (ID) of the pickup spool (1)   means to modify the twist (Ω) applied to the yarn in the machine twisting means so that the twist value (Ω) applied is equivalent to:
   Ω (tpm)=2/(ID*3.1416)
 
   
       so that the twist value of the rolled yarn (α) along the full pickup spool (1) is variable and is associated to the winding/unwinding instant diameter (ID) of the pickup spool (1) itself and is equivalent to:
   α (tpm)=1/(ID( m )* TT ).
 
 
     
     
         5 . The yarn twisting machine according to the  claim 3 , characterized in that the twisting machine is a ring machine that comprises a delivery spool (2) of yarn (H) at 0 twist that is unwound at “de filé” so that when unwinding a twist in Z direction is applied to the yarn (H) with a twist value of the yarn prior to the twisting means (λ) and that is equivalent to:
   (λ)=(1/ID2)*3.1416),
 
 twisting means that apply to the yarn (H) a twist to the yarn (Ω) in a Z direction, a pickup spool (1) of yarn (H) with a twist value of the rolled yarn (α) means to know the instant diameter (ID2) of the delivery spool (2) means to know the instant diameter (ID) of the pickup spool (1) means to modify the twist (Ω) applied to the yarn in the machine twisting means so that the twist value (Ω) applied is equivalent to:
   Ω (tpm)=2/(ID/1)*3.1416)−(1/(ID2)*3.1416)
 
 
 
       so that the twist value of the rolled yarn (α) along the full pickup spool (1) is variable and is associated to the winding/unwinding instant diameter (ID) of the pickup spool (1) itself and is equivalent to:
   α (tpm)=1/(ID* TT ).
 
 
     
     
         6 . The yarn twisting machine according to the  claim 3 , characterized in that the twisting machine is a ring machine that comprises
 a delivery spool (2) of yarn (H) at 0 twist that is unwound at “de filé” so that when unwinding a twist in Z direction is applied to the yarn (H) with a twist value of the yarn prior to the twisting means (λ) and that is equivalent to:
   (λ)=(1/ID2)*3.1416),
 
   twisting means that apply to the yarn (H) a twist to the yarn (Ω) in a S direction,   a pickup spool (1) of yarn (H) with a twist value of the rolled yarn (α)   means to know the instant diameter (ID2) of the delivery spool (2)   means to know the instant diameter (ID) of the pickup spool (1)   means to modify the twist (Ω) applied to the yarn in the machine twisting means so that the twist value (Ω) applied is equivalent to:
   Ω (tpm)=(2/(ID/1)*3.1416)+(1/(ID2)*3.1416)
 
   
       so that the twist value of the rolled yarn (α) along the full pickup spool (1) is variable and is associated to the winding/unwinding instant diameter (ID) of the pickup spool (1) itself and is equivalent to:
   α (tpm)=1/(ID* TT ).
 
 
     
     
         7 . The yarn twisting machine according to the  claim 3 , characterized in that the twisting machine is a ring machine that comprises
 a delivery spool (2) of yarn (H) at 0 twist that is unwound at “de filé” so that when unwinding a twist in S direction is applied to the yarn (H) with a twist value of the yarn prior to the twisting means and (λ) that is equivalent to:
   (λ)=(1/ID2)*3.1416),
 
   twisting means that apply to the yarn (H) a twist to the yarn (Ω) in a Z direction,   a pickup spool (1) of yarn (H) with a twist value of the rolled yarn (α)   means to know the instant diameter (ID2) of the delivery spool (2)   means to know the instant diameter (ID) of the pickup spool (1)   means to modify the twist (Ω) applied to the yarn in the machine twisting means so that the twist value (Ω) applied is equivalent to:
   Ω (tpm)=(2/(ID/1)*3.1416)+(1/(ID2)*3.1416)
 
   
       so that the twist value of the rolled yarn (α) along the full pickup spool (1) is variable and is associated to the winding/unwinding instant diameter (ID) of the pickup spool (1) itself and is equivalent to:
   α (tpm)=1/(ID* TT ).
 
 
     
     
         8 . The yarn twisting machine according to the  claim 3 , characterized in that the twisting machine is a ring machine that comprises
 a delivery spool (2) of yarn (H) at 0 twist that is unwound at “de filé” so that when unwinding, a twist in S direction is applied to the yarn (H) with a twist value of the yarn prior to the twisting means and (λ) that is equivalent to:
   (λ)=(1/ID2)*3.1416),
 
   twisting means that apply to the yarn (H) a twist to the yarn (Ω) in a S direction,   a pickup spool (1) of yarn (H) with a twist value of the rolled yarn (α)   means to know the instant diameter (ID2) of the delivery spool (2)   means to know the instant diameter (ID) of the pickup spool (1)   means to modify the twist (Ω) applied to the yarn in the machine twisting means so that the twist value (Ω) applied is equivalent to:
   Ω (tpm)=2/(ID/1)*3.1416)−(1/(ID2)*3.1416)
 
   
       so that the twist value of the rolled yarn (α) along the full pickup spool (1) is variable and is associated to the winding/unwinding instant diameter (ID) of the pickup spool (1) itself and is equivalent to:
   α (tpm)=1/(ID* TT ).
 
 
     
     
         9 . The yarn twisting machine according to the  claim 3 , characterized in that the twisting machine is a 2×1 machine that comprises
 a delivery spool (2) of yarn (H) at 0 twist that is unwound at “de filé” so that when unwinding a twist in Z direction is applied to the yarn (H) with a twist value of the yarn prior to the twisting means (λ) and that is equivalent to:
   (λ)=(1/ID2)*3.1416),
 
 
 twisting means that apply to the yarn (H) a twist to the yarn (Ω) in a Z direction, 
 a pickup spool (1) of yarn (H) with a twist value of the rolled yarn (α) 
 means to know the instant diameter (ID2) of the delivery spool (2) 
 means to know the instant diameter (ID) of the pickup spool (1) 
 means to modify the twist (Ω) applied to the yarn in the machine twisting means so that the twist value (Ω) applied is equivalent to:
   Ω (tpm)=2/(ID/1)*3.1416)−(1/(ID2)*3.1416)
 
 
 
       so that the twist value of the rolled yarn (α) along the full pickup spool (1) is variable and is associated to the winding/unwinding instant diameter (ID) of the pickup spool (1) itself and is equivalent to:
   α (tpm)=1/(ID* TT ).
 
 
     
     
         10 . Yarn twisting machine according to the  claim 3 , characterized in that the twisting machine is a 2×1 machine that comprises
 a delivery spool (2) of yarn (H) at 0 twist that is unwound at “de filé” so that when unwinding, a twist in Z direction is applied to the yarn (H) with a twist value of the yarn prior to the twisting means (λ) and that is equivalent to:
   (λ)=(1/ID2)*3.1416),
 
 
 twisting means that apply to the yarn (H) a twist to the yarn (Ω) in a S direction, 
 a pickup spool (1) of yarn (H) with a twist value of the rolled yarn (α) 
 means to know the instant diameter (ID2) of the delivery spool (2) 
 means to know the instant diameter (ID) of the pickup spool (1) 
 means to modify the twist (Ω) applied to the yarn in the machine twisting means so that the twist value (Ω) applied is equivalent to:
   Ω (tpm)=2/(ID/1)*3.1416)+(1/(ID2)*3.1416)
 
 
 
       so that the twist value of the rolled yarn (α) along the full pickup spool (1) is variable and is associated to the winding/unwinding instant diameter (ID) of the pickup spool (1) itself and is equivalent to:
   α (tpm)=1/(ID* TT ).
 
 
     
     
         11 . The yarn twisting machine according to the  claim 3 , characterized in that the twisting machine is a 2×1 machine that comprises
 a delivery spool (2) of yarn (H) at 0 twist that is unwound at “de filé” so that when unwinding, a twist in S direction is applied to the yarn (H) with a twist value of the yarn prior to the twisting means (λ) and that is equivalent to:
   (λ)=(1/ID2)*3.1416),
 
 
 twisting means that apply to the yarn (H) a twist to the yarn (Ω) in a Z direction, 
 a pickup spool (1) of yarn (H) with a twist value of the rolled yarn (α) 
 means to know the instant diameter (ID2) of the delivery spool (2) 
 means to know the instant diameter (ID) of the pickup spool (1) 
 means to modify the twist (Ω) applied to the yarn in the machine twisting means so that the twist value (Ω) applied is equivalent to:
   Ω (tpm)=(1/(ID/1)*3.1416)+(1/(ID2)*3.1416)
 
 
 
       so that the twist value of the rolled yarn (α) along the full pickup spool (1) is variable and is associated to the winding/unwinding instant diameter (ID) of the pickup spool (1) itself and is equivalent to:
   α (tpm)=1/(ID* TT ).
 
 
     
     
         12 . Yarn twisting machine according to the  claim 3 , characterized in that the twisting machine is a 2×1 machine that comprises
 a delivering spool (2) of yarn (H) at 0 twist that is unwound at “de filé” so that when unwinding, a twist in S direction is applied to the yarn (H) with a twist value of the yarn prior to the twisting means (λ) and that is equivalent to:
   (λ)=(1/ID2)*3.1416),
 
 
 twisting means that apply to the yarn (H) a twist to the yarn (Ω) in a S direction, 
 a pickup spool (1) of yarn (H) with a twist value of the rolled yarn (α) 
 means to know the instant diameter (ID2) of the delivery spool (2) 
 means to know the instant diameter (ID) of the pickup spool (1) 
 means to modify the twist (Ω) applied to the yarn in the machine twisting means so that the twist value (Ω) applied is equivalent to:
   Ω (tpm)=(1/(ID/1)*3.1416)−(1/(ID2)*3.1416)
 
 
 
       so that the twist value of the rolled yarn (α) along the full pickup spool (1) is variable and is associated to the winding/unwinding instant diameter (ID) of the pickup spool (1) itself and is equivalent to:
   α (tpm)=1/(ID* TT ).