Devices for applying adhesives to a moving web

A nozzle device for applying adhesive to a moving web, including means for lifting the web from the nozzle, an external closure member for closing the nozzle, means defining a supply passage through which adhesive is to be passed to the nozzle and which includes an outlet, an expansion chamber which communicates with the outlet, and means for automatically expanding the expansion chamber so as to reduce the pressure of adhesive in the nozzle during the interval of time following the moving of the web away from the nozzle and before the closure member engages the nozzle so as to close it.

A device for applying adhesive to a web used to join two tobacco rods to opposite ends of a double-length filter to form an assembly which is then cut in half to form two filter-tipped cigarettes, comprising an elongated adhesive supply nozzle against which the web is to run with the nozzle lying across the web, a closure member for the nozzle comprising a resilient roller arranged with its axis equal to the length of the nozzle, the roller being carried by a carrier member pivoted about a fixed axis which is parallel to the axis of the roller and is at a distance from the latter axis such that the roller is resiliently compressed on being carried by said carrier member to a position in which it closes the nozzle, and a lifting plate mounted on the pivotally mounted member at a distance from the axis of rotation of the said member which is greater than the distance of the roller from the said axis, whereby the lifting plate lifts the web from the nozzle as the roller moves from the first position to the second position.