Machine and method for making a continuous tubular element with filling having a spacer and/or filter function

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.