Patent ID: 11918031
Assignee: G.D S.P.A.
Field: Surface technology, coating (Chemistry)
Classification: CPC A  B | IPC A

Claim 9:
10. A method for applying an adhesive on a wrapping band of a smoking article, the smoking article comprising a segment of filter material and a segment of smokable material, wherein the method comprises the following steps:
moving the wrapping band along a feed direction, where the wrapping band has a longitudinal direction of extension, a first surface and a second surface opposed to the first surface; the wrapping band comprising a first plurality of portions having a first thickness and a second plurality of portions having a second thickness greater than the first thickness, wherein the first plurality of portions and the second plurality of portions are disposed alternately with each other along the direction of extension;
performing a relative movement between a nozzle, which has a delivery end, and the wrapping band towards and away from each other between a first position, where the delivery end of the nozzle and the second surface of the wrapping band are at a first distance which is less than or equal to the second thickness, and a second position, where the delivery end of the nozzle and the second surface of the wrapping band are at a second distance which is greater than the second thickness;
delivering an adhesive on the first surface of the wrapping band through the nozzle, when the nozzle and the wrapping band are at the first position and the delivery end of the nozzle faces a portion of the first plurality of portions;
wherein the step of performing the relative movement is performed in a manner synchronized with the first plurality of portions and with the second plurality of portions such that, when the delivery end of the nozzle faces the portion of the first plurality of portions, the delivery end is at the first position and adhesive is issued from the nozzle, and when the delivery end of the nozzle faces a portion of the second plurality of portions, the delivery end is at the second position; and
wherein the step of performing the relative movement between the nozzle and the wrapping band comprises a step of moving the wrapping band towards and away from the nozzle.