US 11,864,580 B2
Method and unit for crimping a web of material for the tobacco industry
Nicola Baldanza, Zola Predosa (IT); Massimo Sartoni, Bologna (IT); and Luca Federici, Bologna (IT)
Assigned to G.D S.P.A., Bologna (IT)
Appl. No. 16/954,439
Filed by G.D S.P.A., Bologna (IT)
PCT Filed Dec. 17, 2018, PCT No. PCT/IB2018/060188
§ 371(c)(1), (2) Date Jun. 16, 2020,
PCT Pub. No. WO2019/123210, PCT Pub. Date Jun. 27, 2019.
Claims priority of application No. 102017000148879 (IT), filed on Dec. 22, 2017.
Prior Publication US 2021/0084966 A1, Mar. 25, 2021
Int. Cl. A24B 3/14 (2006.01); A24D 3/02 (2006.01); A24C 5/00 (2020.01)
CPC A24B 3/14 (2013.01) [A24C 5/005 (2013.01); A24D 3/0204 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method for crimping a web of material for the tobacco industry, comprising the following steps:
feeding a web of material for the tobacco industry along a feed path;
crimping the web between two crimping rollers operatively coupled to make a plurality of longitudinal easy folding lines on the web;
measuring with at least one sensor a value of a thickness of the web before the step of crimping;
wherein the step of crimping the web is adjusted during crimping as a function of variations of the measured value of the thickness along the web measured with the at least one sensor; and
wherein the two crimping rollers are mounted on a supporting element and wherein the method comprises varying at least one chosen from a position and an orientation of the supporting element to vary an orientation of the web being fed to the two crimping rollers relative to the two crimping rollers.