Sewing – Method of sewing
Reexamination Certificate
1999-06-29
2001-01-09
Nerbun, Peter (Department: 3741)
Sewing
Method of sewing
C112S278000, C112S279000, C242S370000
Reexamination Certificate
active
06170418
ABSTRACT:
BACKGROUND OF THE INVENTION
The invention relates to a method for transmitting thread-specific data in rereeling operations for the manufacture of two-thread lock stitch seams which have to be documented as well as an arrangement for carrying It out.
With Increasing measures for quality assurance in all areas of modern technology the knowledge of production data is indispensable when manufacturing a product. In the concluding documentation of the manufacturing process these data are combined together with the data of the components involved in the manufacturing process in a data record, which is assigned to the respective product and can be interrogated by means of a code number or the like at any time.
In connection with the manufacture of release seams on sewings also the underthread has to be documented beside other components in the case of two-thread lock stitch seams. Since the under-thread bobbin is on the one hand indispensable for the manufacturing process of the two-thread lock stitch seam, but on the other hand its capacity is highly restricted, it only serves as an Intermediate carrier for the under-thread.
As a result there is the problem that the information concerning the thread material used for the under-thread, such as article number or batch number cannot be transferred onto the under-thread bobbin during the reeling operation. After the thread had been reeled onto the under-thread bobbin and the bobbin had been taken out of the conventional reeling station, there is consequently no possibility left of identifying the reeled thread and of storing detailed information about it. Thus, there is also no possibility of specifying the under-thread designed as release thread in the documentation.
SUMMARY OF THE INVENTION
The problem to be solved by the invention is to make a complete documentation of the data concerning the under-thread in two-thread lock stitch seams in connection with other data on the manufacturing process of a sewed product possible, while avoiding the abovementioned disadvantages.
This problem is solved by the invention in such a way that the bobbin holding the thread, in particular the under-thread bobbin is provided with a definite bobbin identification, that in a reeling station, in which thread material for the under-thread is reeled from a thread stock onto the under-thread bobbin, the bobbin identification Is detected, and is stored together with a first data record characterizing the thread material and the reeling operation in a data storage medium, that the bobbin identification is detected after inserting the under-thread bobbin into a sewing machine, that from the bobbin identification the first data record stored therewith is determined and is assigned to a second data record concerning the sewing operation and/or the sewing and that the data set formed in this way is stored.
Due to the definite identification of the under-thread bobbins it is possible to assign a certain length of thread material of the clearly identified thread stock to a certain seam of a product and thus to obtain the thread data of the under-thread in a data record characterizing the manufacture of a product. The bobbin identification is of no importance for the final data record. It only serves to establish the connection between the first data record and the second data record.
In order to make it possible that the under-thread bobbins can be used again and again, the assignment of the first data record to the bobbin identification is according to the Invention, deleted in the reeling station, after the under-thread had been used up and a possibly remaining thread had been removed from the respective under-thread bobbin, before a new thread is reeled onto the under-thread bobbin.
The invention further relates to an arrangement 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 having at least one sewing machine and one reeling station in which thread for the under-thread is reeled from a thread stock onto the under-thread bobbin which has to be inserted into the sewing machine. According to the invention, this arrangement is characterized in that the under-thread bobbins are provided each with a definite bobbin identification, that both the reeling station and the sewing machine each have a sensor for detecting the bobbin identification of each inserted under-thread bobbin, respectively, and that the sensors are linked to a data processing unit. which assigns the bobbin identification detected by the sensor of the reeling station to a first data record characterizing the under-thread and the reeling operation, and which stores the bobbin identification together with the first data record in a data storage medium and which determines the corresponding first data record by means of the bobbin identification detected by the sensor of the sewing machine, assigns it to a second data record characterizing the sewing operation and/or the sewing and stores it together therewith. In a preferred embodiment of the invention the bobbin identification is applied to at least one flange of the under-thread bobbin in the form of a bar code, the sensors in the reeling station and in the sewing machine being bar code readers.
The method according to the invention is not restricted to the rereeling of a thread onto the under-thread bobbin of a two-thread lock stitch machine, but can be used for all rereeling operations.
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patent: 6012402 (2000-01-01), Sekine
patent: 3923507A (1991-01-01), None
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patent: 342527A (1989-11-01), None
KSL Keilmann Sondermaschinenbau GmbH
McCormick Paulding & Huber LLP
Nerbun Peter
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