Carrying gripper for weaving looms with (anti-loop) device to avoid anticipated weft gripping

Abstract

Carrying gripper for weaving looms, of the type wherein a channel ( 5 ) is formed behind the gripper tip head ( 4 ), arranged on a substantially vertical plane parallel to the direction of the waiting weft threads, for weft thread entry in an inner area of the gripper and towards the elastic weft-gripping element ( 8, 9 ). The inlet ( 7 ) of the elastic gripping element is arranged on the bottom of the channel ( 5 ) and immediately downstream thereof, and a weft thread deflector ( 6 ) is arranged sideways to the inlet ( 7 ), on the opposite side with respect to the weft thread end connected to the fabric being woven. The deflector ( 6 ) delays entry of the weft thread in the gripping element ( 8, 9 ), thereby preventing advance gripping of thin wefts.

1 ) A carrying gripper for weaving looms, of the type wherein behind the gripper tip head ( 4 ) a channel ( 5 ) is formed for weft thread insertion into an inner area of the gripper and towards the elastic weft gripping means ( 8 ,  9 ), said channel lying on a substantially vertical plane parallel to the direction of the waiting weft threads, the inlet ( 7 ) of said elastic gripping means being arranged on the bottom of said channel ( 5 ) and immediately downstream thereof, characterised in that it further comprises a weft thread deflector ( 6 ) arranged sideways to said inlet ( 7 ) of the elastic gripping means ( 8 ,  9 ) and on the opposite side in respect of the weft thread end joined to the fabric being woven, said deflector ( 6 ) being apt to delay weft thread entry into said gripping means ( 8 ,  9 ).  
   
   
       2 ) The carrying gripper for weaving looms as in  claim 1 , wherein said deflector ( 6 ) consists of an element fastened to the gripper or formed integrally therewith, which develops in the longitudinal direction of the gripper and has a resting surface for the weft thread.  
   
   
       3 ) The carrying gripper for weaving looms as in  claim 2 , wherein the weft thread resting surface formed on said deflector ( 6 ) is radiussed at the front to the back wall of the weft thread entry channel ( 5 ).  
   
   
       4 ) The carrying gripper for weaving looms as in  claim 2 , wherein the weft thread resting surface formed on said deflector ( 6 ) has an inclination to a vertical plane between 0° and 90°.  
   
   
       5 ) The carrying gripper for weaving looms as in  claim 2 , wherein the weft thread resting surface formed on said deflector ( 6 ) has an inclination to a vertical plane between 50° and 80°.  
   
   
       6 ) The carrying gripper for weaving looms as in  claim 2 , wherein the free lower edge of said deflector ( 6 ) is arranged at the same height as the inlet ( 7 ) to the elastic weft thread gripping means ( 8 ,  9 ).  
   
   
       7 ) The carrying gripper for weaving looms as in  claim 1 , wherein said gripper further comprises a mobile device ( 1 ) defining the back wall of the weft thread entry channel ( 5 ), characterised in that said deflector ( 6 ) is formed integrally with said device ( 1 ) and is mobile therewith.  
   
   
       8 ) The carrying gripper for weaving looms as in  claim 2 , wherein said gripper further comprises a mobile device ( 1 ) defining the back wall of the weft thread entry channel ( 5 ), characterised in that said deflector ( 6 ) is formed integrally with said device ( 1 ) and is mobile therewith.  
   
   
       9 ) The carrying gripper for weaving looms as in  claim 3 , wherein said gripper further comprises a mobile device ( 1 ) defining the back wall of the weft thread entry channel ( 5 ), characterised in that said deflector ( 6 ) is formed integrally with said device ( 1 ) and is mobile therewith.  
   
   
       10 ) The carrying gripper for weaving looms as in  claim 4 , wherein said gripper further comprises a mobile device ( 1 ) defining the back wall of the weft thread entry channel ( 5 ), characterised in that said deflector ( 6 ) is formed integrally with said device ( 1 ) and is mobile therewith.  
   
   
       11 ) The carrying gripper for weaving looms as in  claim 5 , wherein said gripper further comprises a mobile device ( 1 ) defining the back wall of the weft thread entry channel ( 5 ), characterised in that said deflector ( 6 ) is formed integrally with said device ( 1 ) and is mobile therewith.  
   
   
       12 ) The carrying gripper for weaving looms as in  claim 6 , wherein said gripper further comprises a mobile device ( 1 ) defining the back wall of the weft thread entry channel ( 5 ), characterised in that said deflector ( 6 ) is formed integrally with said device ( 1 ) and is mobile therewith.