US 12,466,098 B2
Calibration system and calibration method for a converting machine
Robert Amoros, Villette d'Anthon (FR); and Stéphane Charpin, Villeurbanne (FR)
Assigned to BOBST LYON, Bron (FR)
Appl. No. 18/248,204
Filed by BOBST LYON, Bron (FR)
PCT Filed Oct. 6, 2021, PCT No. PCT/EP2021/077610
§ 371(c)(1), (2) Date Apr. 6, 2023,
PCT Pub. No. WO2022/074071, PCT Pub. Date Apr. 14, 2022.
Claims priority of application No. 20315427 (EP), filed on Oct. 7, 2020.
Prior Publication US 2023/0373124 A1, Nov. 23, 2023
Int. Cl. B26D 5/00 (2006.01)
CPC B26D 5/007 (2013.01) 17 Claims
OG exemplary drawing
 
1. A converting machine comprising a rotary die-cutting tool and a plurality of individually controllable transfer drives, each transfer drive being operationally connected to at least one transfer unit configured to transport a sheet along a travel path in a direction of conveyance through the converting machine, the converting machine further comprising a calibration system comprising:
an image sensor configured to capture an actual image of an indicia on a sheet passing through the converting machine,
a memory configured to store an optimal position of a predetermined reference point in the indicia comprising a lateral coordinate and a longitudinal coordinate, and
a control unit configured to receive data from the image sensor and determine a lateral coordinate and a longitudinal coordinate of a detected reference point in the indicia, and calculate a deviation comprising a longitudinal indicia displacement and a lateral indicia displacement from the position of the detected reference point in relation to the position of the predetermined reference point,
wherein the control unit is further configured to execute a correction program stored in the memory when at least one of the longitudinal indicia displacement and the lateral indicia displacement exceeds a predetermined tolerance threshold.