Unit for feeding products to a blistering machine

A unit (1) for feeding products (3) to a blistering machine (M) comprising:

• a delivery group (2,2a,S) for selectively distributing products (3) to a filling station (SR) where the products are introduced into respective blisters (40) of a blister band (4), the blister band moving in a forward direction (W) inside said blistering machine (M):
• said filling station (SR) having conveyor means (10) consisting of at least one endless belt (11) having a plurality of seats (110) therein for receiving the products (3) distributed by the delivery group (2,2a,S);
• said at least one endless belt (11) moving in step relation with said blister band (4) and being wound around a pair of opposed pulling wheels (13,14), an upper portion of the endless belt being an upper run (11a) extending below the delivery group (2,2a,S) for receiving said products, and a lower portion of the endless belt being a lower run (11b) extending for a least a first portion parallel to said forward direction (W) and above said blister band (4), the lower run disposed in a facing relation to said blister band (4), as the lower run and blister band travel together through said first portion;
• said endless belt (11) and said delivery group (2,2a,S) being moved with a vibration motion with respect to one another;
• said seats (110) on said endless belt (11) having means (132) for holding said products (3) against a bottom of said seats (110) as said endless belt travels around a pulling wheel (13) from said upper run (11a) to said lower run (11b), said holding means being releasable for releasing said products (3) from said seats into respective blisters (40) when said seats travel around said pulling wheel into a proximity position with respect to said respective blisters;
• said seats having holes in the bottom thereof extending through said endless belt, said holding means (132) being suction means (132) in communication with said through holes (111), and thereby with said products in said seats (110), such that said suction means hold said products against the bottom of said seats until the proximity position is reached.