Abstract: A method of gumming a web of paper material in a filter tip attachment machine is implemented using a gumming device that comprises a gumming roller and a transfer roller counter-rotating tangentially one to another about horizontal and parallel axes, and creating a trough in which to hold a prescribed quantity of adhesive supplied by a feed circuit, also a drive system by which the rollers are set in rotation on their axes, and a control unit to which both the feed circuit and the drive system are interlocked. The gumming roller revolves tangentially to the web of material at a gumming station, and the method envisages a procedure, triggered in the event of a stoppage affecting the machine, that consists in the steps of suspending delivery of the adhesive, distancing the web of paper material from the gumming roller, and reversing the direction of rotation of the rollers, relative to the direction of rotation during normal operation, in such a way that the trough is emptied gradually of adhesive.

Abstract: A method of gumming a web of paper material in a filter tip attachment machine is implemented using a gumming device that comprises a gumming roller and a transfer roller counter-rotating tangentially one to another about horizontal and parallel axes, and creating a trough in which to hold a prescribed quantity of adhesive supplied by a feed circuit, also a drive system by which the rollers are set in rotation on their axes, and a control unit to which both the feed circuit and the drive system are interlocked. The gumming roller revolves tangentially to the web of material at a gumming station, and the method envisages a procedure, triggered in the event of a stoppage affecting the machine, that consists in the steps of suspending delivery of the adhesive, distancing the web of paper material from the gumming roller, and reversing the direction of rotation of the rollers, relative to the direction of rotation during normal operation, in such a way that the trough is emptied gradually of adhesive.