Method and arrangement for transmitting yarn-specific data during rewinding processes for producing two-thread lock stitch seams which are to be documented

Apparatus for transmitting thread-specific data in re-reeling operations for the manufacture of two-thread lock stitch seams, which have to be documented, in two-thread lock stitch machines, said apparatus comprising:

• at least one sewing machine (18), and a reeling station (28) in which thread for an under-thread is reeled in a reeling operation from a thread stock (30) onto under-thread bobbins (10) which have to be inserted into the sewing machine (18), wherein the under-thread bobbins (10) are each provided with a definite bobbin identification (16), both the reeling station (28) and the sewing machine (18) each have a sensor (32) or (34) for detecting the bobbin identification (16) of each inserted under-thread bobbin (10) and the sensors (32, 34) are linked to a data processing unit (24) which assigns the bobbin identification (16) detected by the sensor (32) of the reeling station (28) to a first data record characterizing the under-thread and/or the reeling operation as well as stores the bobbin identification (16) together with the first data record in a data storage medium, and which determines the corresponding first data record from the bobbin identification (16) detected by the sensor (34) of the sewing machine (18), assigns said first data record to a second data record characterizing a sewing operation and/or a sewn product and stores said first data record together with said second data record.