A device and a method for forming tips of rod-like article for tobacco industry

A device for forming tips of a rod-like article, characterized in that it comprises:

• a drum conveyor having at least one flute for transferring the rod-like article transversally to an axis (k) of the rod-like article, wherein the flute for transferring the rod-like article is configured to move along a first circular path (s);
• and
• a first pressing element configured to move along a second circular path (r) and a second pressing element configured to move along a third circular path (t), wherein the third circular path (t) is located on a side of the first circular path (r) opposite the second circular path (s);
• the first circular path (s), the second circular path (r), and the third circular path (t) being arranged coaxially,
• wherein the first and second pressing elements are configured to move linearly along an axis (Y) of the flute transverse to the first circular path (s) towards and away from each other, and wherein at least one of the first or second pressing elements has a concave forming surface.

A device for producing rod-like articles for tobacco industry, comprising:

• a feeding device for feeding the rod-like article;
• a transporting device for transferring the rod-like article;
• a filling device for feeding a filling into the rod-like article;
• and
• a forming device for forming tips of the rod-like article located along a transporting path of the rod-like article downstream of the device for feeding the filling into the rod-like article, the forming device comprising:
• a drum conveyor having at least one flute for transferring the rod-like article transversally to an axis (k) of the rod-like article, wherein the flute for transferring the rod-like article is configured to move along a first circular path (s);
• and
• a first pressing element configured to move along a second circular path (r) and a second pressing element configured to move along a third circular path (t), wherein the third circular path (t) is located on a side of the first circular path (r) opposite the second circular path (s), the first circular path (s), the second circular path (r), and the third circular path (t) being arranged coaxially;
• wherein the first and second pressing elements are configured to move linearly along an axis (Y) of the flute (28) transverse to the first circular path (s) towards and away from each other and wherein at least one of the first or second pressing elements has a concave forming surface.

A method for forming tips of a rod-like article, comprising:

• positioning the rod-like article into a flute on a first circular movement path (s);
• transferring the rod-like article along the first circular movement path (s) transversally to an axis (k) of said rod-like article;
• transferring coaxially arranged pressing elements in pairs along a second circular path (r) and along a third circular path (t) synchronously with the movement of the rod-like article;
• wherein the third circular path (t) is located on the opposite side of the second circular path (s) with respect to the first circular path (r);
• and
• linearly moving the pressing elements along an axis (Y) of the flute (28) that is transverse to the first circular path (s) towards and away from each other;
• wherein at least one pressing element from the pair of the pressing elements has a concave forming surface such that the linear movement of the pressing elements towards each other causes a decrease of a diameter of at least one tip of the rod-like article.