METHOD AND APPARATUS FOR FORMING CONTINUOUS CIGARETTE RODS

摘要

A layer of tobacco (5) is accumulated against a conveyor belt (2) by a flow of air (6). A trimmer (7) eliminates the superfluous tobacco and forms the final layer (10) which is to be wrapped in paper to form the cigarette rod. One measuring unit (13) measures the thickness of the layer by means of the attenuation of a ray, while another measuring unit (14) measures the degree of porosity of the layer by means of the drop in air pressure between the bottom and the top of the layer. These two data are transmitted to an arithmetic unit (19) which forms a parameter (F), transmitted to a central processing unit (17) which supplies to a transducer (16) the pulses actuating an encoder (15) of a motor (11) governing the thickness of the final layer.