Importance

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Abstract

To determine a paper splice time when the present web is spliced to a next web for the purpose of a so-called lot shift (or a paper shift) in an apparatus for producing corrugated paper boards, not only a length of each core but also a length of each web have been hitherto measured. In view of the current circumstance that a measuring operation is accompanied by various errors and an order is often given with a small lot in size, determination of a paper shift time is made at an operator's discretion which depends on his skill. In practice, there often arises a malfunction that the operator erroneously determines the time when a paper shifting operation is to be performed. To obviate the foregoing malfunction, the present invention provides a system for informing a paper shift during a production controlling operation for an apparatus for producing corrugated paper boards wherein a remaining time till the time when a paper shifting operation is performed can be assured by a time enough long to accomplish the paper shifting operation regardless of a lot size and moreover a warning for informing the time when the paper shifting operation is started as well as a warning at each step during production of corrugated paper boards can be instructed.

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First Claim