US 12,420,518 B2
Coater and embosser-laminator process roll calibration
Cory L. Schubring, De Pere, WI (US)
Assigned to BW CONVERTING, INC., Green Bay, WI (US)
Filed by BW Converting, Inc., Green Bay, WI (US)
Filed on Aug. 14, 2023, as Appl. No. 18/233,529.
Claims priority of provisional application 63/406,406, filed on Sep. 14, 2022.
Prior Publication US 2024/0083133 A1, Mar. 14, 2024
Int. Cl. B31F 1/07 (2006.01); B31F 1/00 (2006.01)
CPC B31F 1/07 (2013.01) [B31F 1/0096 (2013.01); B31F 2201/0741 (2013.01); B31F 2201/0753 (2013.01); B31F 2201/0779 (2013.01); B31F 2201/0784 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method of calibrating a distance and alignment between two rolls, wherein each of the rolls has a face, a first end, and a second end, the method comprising:
(a) moving the rolls to an initial position where the faces of the rolls are devoid of contact with each other;
(b) rotating at least one of the rolls;
(c) decreasing a distance between the first ends of the rolls and a distance between second ends of the rolls until the faces of the rolls make contact on at least one of the ends of the first and second rolls;
(d) increasing the distance between the first ends of the rolls by an incremental amount;
(e) determining contact between the faces of the rolls after the distance between the first ends of the rolls is increased by the incremental amount such that:
(I) when the faces of the rolls contact each other, the method comprises: recording the position of an actuator associated with controlling the distance between the second ends of the rolls, recording an instance of contact between the second ends of the rolls, increasing the distance between the second ends of the rolls by the incremental amount, decreasing the distance between the first ends of the rolls by the incremental amount, determining contact between the faces of the rolls such that:
(1) when the faces of the rolls contact each other, the method comprises: recording the position of an actuator associated with controlling the distance between the first ends of the rolls, recording an instance of contact between the first ends of the rolls, increasing the distance between the first ends of the rolls by the incremental amount multiplied by a factor, and performing steps (c) through (e) until the first and second ends of the rolls contact each other a threshold number of instances of contact at which point the ends of the first and second roll are moved to a respective reference position;
(2) when the faces of the rolls are devoid of contact with each other, the method comprises: performing steps (c) through (e) until the first and second ends of the rolls contact each other a threshold number of instances of contact at which point the ends of the first and second roll are moved to a respective reference position;
(II) when faces of the rolls are devoid of contact, the method comprises: recording the position of the actuator associated with controlling the distance between the first ends of the rolls, and performing steps (c) through (e) until the first and second ends of the rolls contact each other a threshold number of instances of contact at which point the ends of the first and second roll are moved to a respective reference position.