Patent ID: 6096150
Filing Date: 2000-08-01
Classification: B65H

Abstract:
An automatic paper-web splicing system for rotating a new paper roll being spliced, causing the peripheral speed of said new paper roll to agree with the traveling speed of a traveling web, splicing the start end of said new paper roll to said traveling web so as to continuously supply said spliced new paper roll and traveling web to processing apparatus for predetermining processing, said automatic paper-web splicing system comprising;traveling speed detection means for detecting the traveling speed of said traveling web,a detection mark comprising at least two marks provided a predetermined interval apart in the circumferential direction of said new paper roll on the surface in the vicinity of the start end of said new paper roll,new paper roll rotating means for rotating said new paper roll and controlling the peripheral speed thereof in a variable manner,mark detecting means for detecting said two marks as said detection mark during the rotation of said new paper roll,calculating means for calculating the peripheral speed of said new paper roll based on detection signals for said two marks as said detection mark detected by said mark detecting means, andsplicing means for splicing the start end of said new paper roll to said traveling web;said new paper roll rotating means controlling the rotation of said new paper roll so that the peripheral speed calculated by said calculating means agrees with the traveling speed of said traveling web detected by said traveling speed detecting means, andsaid splicing means splicing the start end of said new paper roll to said traveling web in a state where the peripheral speed of said new paper roll agrees with the traveling speed of said traveling web,first pulse signal output means for outputting a first pulse signal corresponding to the traveling speed of said traveling web,second pulse signal output means for outputting a second pulse signal corresponding to the rotating speed of said new paper roll rotating means,clock pulse signal output means for outputting a clock pulse signal of a predetermined frequency, andcontrol means for forming a control signal for said new paper roll rotating means based on detection signals for said two marks, said first pulse signal, said second pulse signal and said clock pulse signal;said traveling speed detecting means detecting said traveling speed based on said first pulse signal, andsaid new paper roll rotating means being controlled by said control means,said detection mark comprises first and second detection bars used as said two marks and provided in parallel with each other, an interval between said first and second detection bars being equal to the distance that said traveling web travels during the period in which said first pulse signal output means outputs a predetermined number of said first pulse signals,said traveling speed detecting means counts the first pulse signals output by said first pulse signal output means, counts the clock pulse signals output by said clock pulse signal output means until the count value of said first pulse signals reaches a predetermined number,said peripheral speed calculating means counts the clock pulse signals output by said clock pulse signal output means during the period during which said mark detecting means detects said first detection bar and then said second detection bar, andsaid control means calculates a first calculated value by comparing and calculating the number of clock pulse signals counted by said traveling speed detecting means and the number of clock pulse signals counted by said peripheral speed calculating means, calculating a second calculated value using said first calculated value and a processed value formed based on the second pulse signal output by said second pulse signal output means, holds said second calculated value as control data, and controls the rotating speed of said new paper roll rotating means based on said control data.