1 results about "Web handling" patented technology

A method (300) for monitoring and holding web (102) of packaging material using a web processing device (100), the web processing device (100) comprising a first roller (104) and a second roller (108), wherein the first roller (104) and the second roller (108) are spaced apart by a distance (D) from each other to form a web relaxation section (112), wherein a first motor (106) is positioned upstream or inside the first roller (104), and a second motor (110) is positioned on the second roller (108). Downstream or inside of 108), wherein a first sensor (114) for detecting a mark (116) on a web (102) is positioned between a first motor (106) and a first roller (104), and a second sensor (118) for detecting a mark (116) is positioned between a second roller (108) and a second motor (110), the method comprising: receiving (302) first speed data (120) from the first motor (106); receiving (302) first speed data (120) from the second motor (110); receiving (302) first speed data (120) from the second motor (110). 304) Second speed data (122); Receive (306) Initial web slack data (126) representing the initial web slack (WS-I) at the first time point; Determine (308) the uncompensated length of the web slack (112) at the second time point based on the first speed data (120) and the second speed data (122) during the time period from the first time point to the second time point and the initial web slack data (126); Receive (310) first registration data (128) from the first sensor (114), the first registration data (128) being related to the detection of a marker (116) at the first time point; Receive (312) second registration data (130) from the second sensor (118), the second registration data (130) being related to the detection of a marker (116) at the third time point; and Determine (314) the compensated length of the web slack (112) at the third time point based on the uncompensated length and the time difference between the second time point and the third time point.