A packaging assembly (1; 1') configured to form and seal a plurality of packs containing a pourable product starting from a tube of packaging material; said packaging assembly (1; 1') comprising: - a pair of endless tracks between which said tube is fed along a straight advancement direction (A); and - a pair of movable members (7; 7'), each one of which movably coupled to, and cyclically movable along, one respective track ; each movable member (7; 7') of said pair of movable members (7; 7') movably carrying one respective forming member (18; 18') linearly movable towards said tube , transversally to said advancement direction (A), adapted to cyclically cooperate in contact with successive tube portions , so as to form at least corresponding pack portions of respective packs ; wherein each forming member (18; 18') comprises a movable portion (21; 21') and each movable member (7; 7') comprises a movable element linearly movable towards said tube and supporting the movable portion (21; 21') of the respective forming member (18; 18'), wherein the packaging assembly further comprises actuator means configured to drive a tilting movement of each movable portion (21; 21'), said movable portion (21; 21') being therefore tiltable with respect to the movable element and with respect to said advancement direction (A) of a given angle (α), said actuator means comprising, for each track , at least one cam surface (26; 34) fixed with respect to the track , and a cam follower (25; 33) carried by the respective forming member (18; 18') and configured to cooperate in a sliding manner with said cam surface (26; 34), characterized in that the actuator means are therefore configured to drive a tilting movement of each tube portion , and each movable portion (21; 21') is tiltable to sequentially control a tilting of said tube portions with respect to said advancement direction (A) . said packaging assembly (1; 1') comprising: - a pair of endless tracks between which said tube is fed along a straight advancement direction (A); and - a pair of movable members (7; 7'), each one of which movably coupled to, and cyclically movable along, one respective track ; - a pair of endless tracks between which said tube is fed along a straight advancement direction (A); and - a pair of movable members (7; 7'), each one of which movably coupled to, and cyclically movable along, one respective track ; each movable member (7; 7') of said pair of movable members (7; 7') movably carrying one respective forming member (18; 18') linearly movable towards said tube , transversally to said advancement direction (A), adapted to cyclically cooperate in contact with successive tube portions , so as to form at least corresponding pack portions of respective packs ; wherein each forming member (18; 18') comprises a movable portion (21; 21') and each movable member (7; 7') comprises a movable element linearly movable towards said tube and supporting the movable portion (21; 21') of the respective forming member (18; 18'), wherein the packaging assembly further comprises actuator means configured to drive a tilting movement of each movable portion (21; 21'), said movable portion (21; 21') being therefore tiltable with respect to the movable element and with respect to said advancement direction (A) of a given angle (α), said actuator means comprising, for each track , at least one cam surface (26; 34) fixed with respect to the track , and a cam follower (25; 33) carried by the respective forming member (18; 18') and configured to cooperate in a sliding manner with said cam surface (26; 34), characterized in that the actuator means are therefore configured to drive a tilting movement of each tube portion , and each movable portion (21; 21') is tiltable to sequentially control a tilting of said tube portions with respect to said advancement direction (A) . <EOS>