| 摘要 |
1,054,557. Cigarette-making machines. SERVICE D'EXPLOITATION INDUSTRIELLE DES TABACS ET DES ALLUMETTES. Aug. 2, 1963, No. 30659/63. Heading A2C. A tobacco rod consists of a plurality of concentric layers or strands the characteristics of which are dependent on the distance of the corresponding layer to the axis of the stem. The rod is produced by forming a plurality of flat layers of given width and thickness into a continuous open ring and compressing the ring. Apparatus for forming the rod comprises a perforated belt 1 against the underside of which tobacco is drawn by means of a pulsed flow of air travelling up a conduit 10 in the direction shown by the arrows and out of conduits 13 (Fig. 2) to form superimposed layers 30 of varying characteristics, e.g. density, dependent on the distance of each layer from the belt 1 which cause it to take progressively an inverted U-shape (Figs. 3 and 4). After formation into an inverted U the tobacco rod layer passes over a guide member 5 which carries a paper web 4 (Fig. 5). A current of air is passed laterally towards the rod to form it into a ring, the paper 4 being kept flat by guides 8. The guide 5 is progressively hollowed out so as to contain the tobacco rod ring wrapped in the paper 4 and the belt 1 is restored to his flat shape by means of a guide 2 (Figs. 6 and 7). |
