Powder applicator device, particularly for cigarette making machines

摘要

A device for applying bronze or similar powder, particularly in a cigarette making machine, uses a corona discharge wire (36) or similar conductor maintained at high voltage to establish an electrostatic field which causes powder to be attracted to prepared adhesive patches on a paper web (14). Excess powder carried by the web is removed with the assistance of vibration, which may be produced by passing the web over an ultrasound device (44) or a pulsed air mover (102). Excess powder may also be removed by an air mover (152) directing a stream of air at the surface of the web carrying the powder.