number 1 in the accompanying drawing indicates a number of double cigarette portions , which are fed in a direction d , crosswise to their respective longitudinal axes , along a path p defined by a succession of known suction conveyor rollers ( not shown ) of a filter - assembly machine ( not shown ). path p lies in a plane g defined by the surface of the rollers ( not shown ) and coincident with the plane of fig1 . each portion 1 is substantially cylindrical , and has two opposite ends 2a , 2b formed by two successive cuts at a cutting station ( not shown ) of a cigarette manufacturing machine ( not shown ). along path p are arranged successively : a supply station 3 ; a cutting station 4 comprising a cutter 5 ; a turnover station 6 ; a pairing station 7 ; a station 8 for inserting double filters 9 and respective projecting gummed bands 10 ; a rolling station 11 ; an axial - transfer station 12 ; a cutting station 13 comprising a cutter 14 ; and a turnover station 15 . in actual use , portions 1 are transferred to supply station 3 by a transfer device ( not shown ) connecting the manufacturing machine ( not shown ) to the filter - assembly machine ( not shown ). portions 1 are fed by said transfer device ( not shown ) successively and in equally spaced manner in direction d to the input of the filter - assembly machine ( not shown ), and are fed in an orderly succession a , still in direction d and by said conveyor rollers ( not shown ), through cutting station 4 where cutter 5 cuts each double portion 1 into two single cigarette portions 16 . for the sake of simplicity , reference will be made in the following description to two consecutive double portions 1a and 1b , double portion 1a preceding double portion 1b with reference to traveling direction d . portions 1a and 1b are arranged alternately in succession a , and are fed through cutting station 4 where cutter 5 cuts portion 1a in half to form a pair 17 of single portions 16a , 16b , and cuts portion 1b in half to form a pair 18 of single portions 16c , 16d . pairs 17 and 18 are arranged in orderly fashion in succession a , and are fed through turnover station 6 where portions 16a , 16b in pair 17 are maintained coaxial and contacting each other end to end with respective ends 2a , 2b facing outwards , while portions 16c , 16d in pair 18 are turned over through 180 ° in opposite directions f1 , f2 , and positioned , in the same plane , coaxial with each other , separated by a distance substantially equal to the length of a double portion 1 , and with respective ends 2a , 2b facing each other . pairs 17 and 18 of portions 16a , 16b , 16c , 16d are fed in the above configuration to pairing station 7 where portions 16c , 16b are kept in the same position with respect to each other and the conveyor roller ( not shown ), while portion 16a is moved , in the same plane , in the opposite direction to direction d into a position coaxial with portion 16c , and also in a direction perpendicular to direction d into a position separated by a given distance of amount ( l ) from portion 16c . the displacement in said two directions is indicated in fig1 by arrow f3 . in substantially the same way , portion 16d is moved , in the same plane , in the same direction as direction d into a position coaxial with portion 16b , and also in a direction perpendicular to direction d into a position separated by a given distance of amount ( l ) from portion 16b . in fig1 the displacement in said two directions is indicated by arrow f4 ; portions 16a , 16d indicated by the dash lines are those prior to displacements f3 , f4 ; and portions 16a , 16d indicated by the continuous lines are those after displacements f3 , f4 . in the above configuration , portions 16a , 16b , 16c , 16d form a pair 19 of coaxial portions 16c , 16a separated by a given distance of amount ( l ), and a pair 20 of coaxial portions 16b , 16d separated by a given distance of amount ( l ) and pairs 19 and 20 are fed in direction d in two successions b and c with the same spacing p1 , and partially engage one another , combfashion , by a length smaller than the length of a single portion 16 . that is , portion 16b of one pair 20 is partially inserted between two portions 16a of two consecutive pairs 19 in direction d , and portion 16a of one pair 19 is partially inserted between two portions 16b of two consecutive pairs 20 in direction d . moreover , each pair 19 is offset with respect to each adjacent pair 20 by a spacing p2 equal to half spacing p1 . the two successions b , c of respective pairs 19 , 20 are fed through station 8 where double filters 9 and respective projecting bands 10 are fed onto the same plane and inserted between portions 16c and 16a of pairs 19 , and between portions 16b and 16d of pairs 20 to form groups 21 arranged in successions b and c . in station 8 , the position of portions 16a , 16b , 16c , 16d remains unchanged , so that groups 21 in successions b and c are also engaged combfashion in the same way as pairs 19 and 20 , and the bands 10 projecting with respect to respective filters 9 , i . e . the bands 10 laid out flat , do not interfere with groups 21 in the adjacent succession b , c . moreover , spacing p1 is greater than the length of band 10 laid out flat in direction d , to prevent the band from interfering with the next group 21 in the same succession b , c . groups 21 , arranged as described , are fed inside station 11 by rolling groups 21 about their respective axes along a common rolling track ( not shown ) to wind bands 10 about respective double filters 9 and about ends 2a of portions 16c , 16a and ends 2b of portions 16b , 16d to form double filter - tipped cigarettes 22 . double filter - tipped cigarettes 22 , arranged in successions b and c and engaged combfashion in the same way as groups 21 , are fed to station 12 , where double cigarettes 22 in succession b are shifted axially and perpendicularly to direction d , as shown by arrow f5 , to position double cigarettes 22 of succession b between the double cigarettes of succession c and so form a single succession c in which double filter - tipped cigarettes 22 are equally spaced with spacing p2 equal to half spacing p1 . in fig1 one double cigarette 22 at station 12 is indicated by a continuous line in succession b and by a dash line in succession c . double cigarettes 22 in single succession c are fed through cutting station 13 where cutter 14 cuts double filter 9 of each double cigarette 22 in half to form a pair of single filter - tipped cigarettes 23 , each comprising a single cigarette portion 16a , 16b , 16c , 16d attached to a single filter 24 formed by cutting respective double filter 9 in half . the cigarettes 23 in each pair are positioned with respective filters 24 facing and adjacent to each other . at turnover station 15 , one cigarette 23 in each pair is turned over through 180 °, in the direction of arrow f6 , into a position parallel to and side by side with the other cigarette 23 in the same pair , so as form a single succession 25 of equioriented cigarettes 23 , i . e . with respective filters 24 all facing the same way . in the fig2 variation , along path p are arranged successively : supply station 3 ; cutting station 4 comprising cutter 5 ; a parting station 26 ; a turnover station 27 ; a pairing station 28 ; a parting station 29 ; a station 30 for inserting double filters 9 and respective projecting gummed bands 10 ; a rolling station 31 ; an axial - transfer station 32 ; cutting station 13 comprising cutter 14 ; and turnover station 15 . in actual use , pairs 17 and 18 of single portions 16a , 16b , 16c , 16d are fed to station 26 where both single portions 16a , 16b in pair 17 and single portions 16c , 16d in pair 18 are parted a given distance along plane g as shown by arrows f7 and f8 , and are fed to station 27 where single portions 16a , 16b in pair 17 are turned over through 180 ° in opposite directions as indicated by respective arrows f9 and f10 , while single portions 16c , 16d in pair 18 remain in the same position . at station 28 , each portion 16c is fed in direction d with respect to the adjacent downstream portion 16a , and is aligned side by side with portion 16a , as shown by arrow f11 , to form a pair 19 of single portions 16a , 16c . similarly , at station 28 , each portion 16d is fed in direction d with respect to the adjacent downstream portion 16b , and is aligned side by side with portion 16b , as shown by arrow f12 , to form a pair 20 of single portions 16b , 16d . pairs 19 and 20 are then fed , in separate successions b and c , to station 29 where both single portions 16a , 16c in pair 19 and single portions 16b , 16d in pair 20 are parted by a given distance of amount ( l ) along plane g as shown by respective arrows f13 and f14 in fig2 . at station 30 , a double filter 9 and respective gummed band 10 are inserted between portions 16a , 16c of pair 19 and between portions 16b , 16d of pair 20 to form groups 21 , which are fed to rolling station 31 where bands 10 are wound about respective double filters 9 and about the ends of portions 16a , 16c in pair 19 and the ends of portions 16b , 16d in pair 20 to form double cigarettes 22 , which are fed in separate successions b and c to station 32 . at station 32 , the double cigarettes 22 in succession b are inserted , as shown by arrow f15 in fig2 between successive double cigarettes 22 in succession c . each double cigarette 22 is then cut in half at double filter 9 to form a pair of single cigarettes 23 with the respective filters facing and adjacent to each other ; and one cigarette 23 in each pair is turned over , as shown by arrow f16 in fig2 to form a single succession 25 of equioriented cigarettes 23 . apart from requiring that only some of the rollers ( not shown ) on the filter - assembly machine ( not shown ) be doubled in length , both the above embodiments of the method according to the invention are particularly advantageous by ends 2a and 2b of each portion 1 -- which are cut on the manufacturing machine ( not shown ) and therefore not perfectly square with respect to portion 1 -- being located contacting double filter 9 and covered by band 10 .
a method of conveying bar - shaped articles on a filter - assembly machine , wherein first articles arranged in an orderly single succession are advanced crosswise with respect to a given traveling direction ; the first articles are cut in half in a direction parallel to the traveling direction to form second articles ; the second articles are rearranged to form a first and a second parallel , side by side succession of respective pairs of second articles ; and the first and second successions of pairs of second articles are advanced in the traveling direction .