US 12,258,685 B2
Sliver preparation
Heinz-Josef Peuker, Wegberg (DE); Chandrassekaran Seshayer, Herzogenrath (DE); Dirk Schiffers, Korschenbroich (DE); and Sarah Meissner, Geilenkirchen (DE)
Assigned to Saurer Intelligent Technology AG, Arbon (CH)
Filed by Saurer Intelligent Technology AG, Arbon (CH)
Filed on Nov. 28, 2023, as Appl. No. 18/521,159.
Claims priority of application No. 503240 (LU), filed on Dec. 22, 2022.
Prior Publication US 2024/0209551 A1, Jun. 27, 2024
Int. Cl. D01H 5/74 (2006.01); D01H 5/32 (2006.01)
CPC D01H 5/74 (2013.01) [D01H 5/32 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A method for operating a drafting system having an exit roller pair and at least one additional drafting system roller pair and/or apron roller pair, the method comprising:
supplying a sliver to a spinning station of an air-jet spinning machine for producing a thread to a vortex chamber of an air-jet spinning device of the spinning station;
decoupled driving of the exit roller pair from the at least one additional drafting system roller pair and/or the apron roller pair;
driving the exit roller pair at a predetermined combing-out speed for combing out the sliver after an interruption of spinning;
wherein the at least one additional drafting system roller pair and/or the apron roller pair located upstream of the exit roller pair in the sliver running direction is stopped or operated at a holding speed which is associated with the combing-out speed and which amounts to a max. 10% of the combing-out speed; and
stopping the drafting system combing and then powering up the drafting system for piecing.