US 12,246,510 B2
Single facer with heating plates for producing corrugated board
Mauro Adami, Viareggio (IT)
Assigned to FOSBER, S.P.A., Pescaglia (IT)
Appl. No. 18/038,306
Filed by Fosber S.p.A., Pescaglia (IT)
PCT Filed Nov. 19, 2021, PCT No. PCT/EP2021/082300
§ 371(c)(1), (2) Date May 23, 2023,
PCT Pub. No. WO2022/112128, PCT Pub. Date Jun. 2, 2022.
Claims priority of application No. 102020000028172 (IT), filed on Nov. 24, 2020.
Prior Publication US 2023/0405962 A1, Dec. 21, 2023
Int. Cl. B31F 1/00 (2006.01); B31F 1/28 (2006.01)
CPC B31F 1/285 (2013.01) [B31F 1/2818 (2013.01); B31F 1/2836 (2013.01); B31F 1/2872 (2013.01)] 25 Claims
OG exemplary drawing
 
1. A single facer comprising:
a bearing structure;
a first feed path for feeding a first paper web towards a corrugating nip formed between a first corrugating roller and a second corrugating roller;
a first heating system provided along the first feed path and adapted to heat the first paper web upstream of the corrugating nip;
a second feed path for feeding a second paper web towards a pressure nip formed between the first corrugating roller and a pressure member co-acting with the first corrugating roller;
a second heating system provided along the second feed path and adapted to heat the second paper web upstream of the pressure nip;
a glue dispenser co-acting with the first corrugating roller and adapted to apply glue to crests formed on the first web paper by the first corrugating roller and the second corrugating roller;
wherein the first heating system comprises at least a first heating plate and a second heating plate, and the second heating system comprises at least a third heating plate and a fourth heating plate; and wherein each of said first heating plate, said second heating plate, said third heating plate and said fourth heating plate has an active surface adapted to be in contact with a respective paper web; and
wherein each of said first heating plate, said second heating plate, said third heating plate and said fourth heating plate is hinged to the bearing structure, so as to rotate around a respective adjusting axis for adjusting an angular position of a respective heating plate of the first heating plate, the second heating plate, the third heating plate, and the fourth heating plate, and is associated with an actuation device for adjusting the angular position of the respective heating plate relative to the respective adjusting axis; and wherein a respective one of the first feed path and the second feed path where the respective heating plate is provided is so configured that a change in the angular position of the respective heating plate results in a change of an arc of contact between the active surface of the respective heating plate and the respective one of the first paper web and the second paper web.