Device and method for decreasing web breaks in a printing system based on web tension ratios
First Claim
1. A device for determining web tension conditions leading to web breaks in a printing system, comprising:
- a database that stores data indicating a tension ratio for a plurality of printing runs, wherein the tension ratio specifies a ratio of a first web tension at a first location within the printing system to a second web tension at a second location within the printing system and wherein a web break occurred during a portion of the plurality of printing runs; and
means for determining from the stored data a value of the tension ratio for which a web break is less likely to occur during another run of the printing system.
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Accused Products
Abstract
A device and a method use a decision-tree induction analysis to determine a web tension ratio range for which web breaks are less likely to occur within a printing system based on web tension data collected from a plurality of previous runs of the printing system. The device and method also measure two are more web tensions during operation of the printing system, calculate a web tension ratio and compare that calculated web tension ratio with the determined web tension ratio range. When the calculated web tension ratio falls outside of the determined web tension ratio range, the device and method alert a user to the fact that a condition leading to a web break is present and/or control the measured web tensions to drive the calculated web tension ratio to be within the determined web tension ratio range.
68 Citations
36 Claims
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1. A device for determining web tension conditions leading to web breaks in a printing system, comprising:
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a database that stores data indicating a tension ratio for a plurality of printing runs, wherein the tension ratio specifies a ratio of a first web tension at a first location within the printing system to a second web tension at a second location within the printing system and wherein a web break occurred during a portion of the plurality of printing runs; and means for determining from the stored data a value of the tension ratio for which a web break is less likely to occur during another run of the printing system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A controller for controlling a printing system having a printing web moving therethrough, comprising:
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a tension detector coupled to the printing system to detect a first tension of the printing web at a first location and to detect a second tension of the printing web at a second location; and means for controlling the printing system to keep a ratio of the first tension to the second tension within a predetermined range to reduce breaks within the printing web. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A device for determining conditions leading to a break of a printing web in a printing system, comprising:
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a database that stores data indicating a tension of the printing web at a first location within the printing system for a plurality of printing runs, wherein a web break occurred during a portion of the plurality of printing runs; and means for implementing a decision-tree induction learning algorithm that uses the stored tension data to determine a first tension value at the first location for which a web break is less likely to occur. - View Dependent Claims (18, 19, 20)
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21. A method for use in reducing the occurrence of breaks in a web of a printing system, comprising the steps of:
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collecting data pertaining to values of web tensions at first and second locations within the printing system during a plurality of runs of the printing system; and determining from the collected data a value of a web tension ratio for which occurrence of breaks in the web is reduced during the plurality of runs of the printing system, wherein the web tension ratio comprises a ratio of the web tension at the first location to the web tension at the second location. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28)
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29. A device for use in reducing web breaks in a printing system, comprising:
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a first tension measurement device that measures a first web tension at a first location within the printing system; a second tension measurement device that measures a second web tension at a second location within the printing system; means for determining a tension ratio of the first web tension to the second web tension; a means for comparing the tension ratio to a predetermined tension ratio range; and means for indicating when the determined tension ratio is outside of the predetermined tension ratio range. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36)
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Specification