IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0041838
(1993-04-01)
|
우선권정보 |
DE-4210957 (1992-04-02) |
발명자
/ 주소 |
- Jurkewitz Manfred (Wiesloch DEX)
|
출원인 / 주소 |
- Heidelberger Druckmaschinen AG (Heidelberg DEX 03)
|
인용정보 |
피인용 횟수 :
10 인용 특허 :
0 |
초록
▼
Method of monitoring the transport of print products in a printing-field machine includes, in a first step, forming, in a control device, monitoring zones for leading and trailing edges of a print product, for a zone free of a print product and for a print-product zone, by initially determining the
Method of monitoring the transport of print products in a printing-field machine includes, in a first step, forming, in a control device, monitoring zones for leading and trailing edges of a print product, for a zone free of a print product and for a print-product zone, by initially determining the positions of the leading and trailing edges over a defined number of print products and storing them in the control device; by, furthermore, checking the mean values, determined on the basis of measured position values of the leading and trailing edges, as to whether the mean values exceed a given tolerance range; if the tolerance range is exceeded and if a detection system does not produce a signal after the transport device has moved somewhat, re-determining the positions of the leading and trailing edges over a further defined number of print products and storing them in the control device until the mean values are within the tolerance range and, thereafter, defining the monitoring zones in which the signal generated by the detection system for the respective zones may be present; in a second step, determining the actual positions of the edges of all further print products and checking as to whether the respective edges are within the given monitoring zone for the respective edge, and as to whether the print product is within the print-product zone, as to whether the print product is really not within the print-product-free zone, and quickly stopping the machine if the outcome of the check is negative.
대표청구항
▼
Method of monitoring the transport of print products in a printing-field machine, which includes: by means of a transport device, conveying similar print products one after the other past at lest one stationary detection system for detecting a leading edge and a trailing edge of the print product, b
Method of monitoring the transport of print products in a printing-field machine, which includes: by means of a transport device, conveying similar print products one after the other past at lest one stationary detection system for detecting a leading edge and a trailing edge of the print product, by means of a position-measuring device, continuously determining the position of the print product with respect to a fixed location of the machine, feeding signals from the detection system and from the position-measuring device to a control device containing a computer, continuously determining the detected position of the print product with the control device with respect to a reference position based upon the signals from the detection system and the position-measuring device, and generating, in the control device, a trouble signal for displaying transport troubles based upon a deviation of the actual position from the reference position of the print produce, the trouble signal being generated in accordance with the position of the print product, based upon a mean value averaged over a defined number of print products, the method which further comprises the steps of: in a first step, forming, in the control device, monitoring zones for the leading and trailing edges of the print product, for a zone free of a print product and for a print-product zone, by initially determining the positions of the leading and trailing edges over a defined number of print products and storing them in the control device, by, furthermore, forming means values of the measured position values of the leading and trailing edges, determining whether the mean values exceed a given tolerance range; if the tolerance range is exceeded and if the detection system does not produce a signal after the transport device has moved a given distance, re-determining the positions of the leading and trailing edges over a further defined number of print products and storing the re-determined positions in the control device until the mean vales are within the tolerance range and, thereafter, defining the monitoring zones in which the signal generated by the detection system for the respective zones may be present; in a second step, determining the actual positions of the edges of all further print products and checking as to whether the respective edges are within the given monitoring zone for the respective edge, as to whether the print product is within the print-product zone, as to whether the print product is really not within the print-product-free zone, and quickly stopping the machine if the outcome of the checking is negative; determining the spread of the position values of the edges and comparing it with a limit value; generating a warning signal if the limit value is exceeded; and repeating the foregoing method steps if the change in the transport sped exceeds a defined amount.
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