US 12,458,058 B2
Machine and method for making a continuous tubular element with filling having a spacer and/or filter function
Ivan Eusepi, Bologna (IT); Nicola Baldanza, Bologna (IT); Marco Esposti, Bologna (IT); Gennaro Rizzo, Bologna (IT); and Giuliano Gamberini, Bologna (IT)
Assigned to G.D S.P.A., Bologna (IT)
Filed by G.D S.P.A., Bologna (IT)
Filed on Jul. 26, 2023, as Appl. No. 18/359,277.
Application 18/359,277 is a division of application No. 17/798,371, granted, now 12,133,548, previously published as PCT/IB2021/051535, filed on Feb. 24, 2021.
Claims priority of application No. 102020000003952 (IT), filed on Feb. 26, 2020.
Prior Publication US 2023/0363442 A1, Nov. 16, 2023
Int. Cl. A24C 5/46 (2006.01); A24C 5/01 (2020.01); A24C 5/18 (2006.01); A24C 5/24 (2006.01); A24D 3/02 (2006.01); B31C 5/00 (2006.01)
CPC A24C 5/46 (2013.01) [A24C 5/01 (2020.01); A24C 5/1807 (2013.01); A24C 5/24 (2013.01); A24C 5/465 (2013.01); A24D 3/0245 (2013.01); B31C 5/00 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A method for making a continuous tubular element with filling having a spacer and/or filter function, comprising the following steps:
feeding at least a first continuous web along a first feed path;
feeding at least a second continuous web along at least a respective second feed path;
forming the first continuous web into a first shaped continuous web to give the first web a three-dimensional non-circular shaped configuration and/or a curved non-circular shaped configuration;
wrapping said second continuous web around said first shaped continuous web to obtain said continuous tubular element defined by a tubular covering containing said first shaped continuous web,
before said wrapping step, applying to said first continuous web and/or to said second continuous web at least one longitudinal line of glue in a position corresponding to at least one zone of superposing and contact between the first and the second continuous web in said continuous tubular element;
wherein the step of forming the first continuous web into said first shaped continuous web is performed by at least partially wrapping the first continuous web around a fixed guide bar; and
wherein said step of wrapping said second continuous web around said first shaped continuous web is performed whilst said first shaped continuous web is guided in a configuration at least partly wrapped on the fixed guide bar.