the dispenser and subsequently feeding the product into the seat and a dispensing device for regulating flow of the product through the nozzles application_number US 73005096 A description number 1 in fig1 indicates a machine for metering pharmaceutical products 2 normally comprising chemical substances in the form of powder or granules machine 1 comprises an operating station 3 at the output of machine 1 and a conveyor 4 with a horizontal conveying branch extending through station 3 in a given substantially horizontal direction 5 fig2 and which provides for conveying in steps or continuously containers 6 of a given form e g sheets known as 34 blisters 34 made of plastic or metal material and presenting a number of cavities 7 arranged in a given geometrical pattern machine 1 also comprises a metering unit 8 located over conveyor 4 and for gravity feeding given quantities of products 2 into blisters 6 unit 8 comprises over conveyor 4 two dispensing members 10 and 12 substantially aligned with each other in a substantially horizontal direction 13 perpendicular to direction 5 and which are connected rigidly to each other by a connecting member 16 shown schematically in fig1 for ensuring members 10 and 12 are moved substantially identically at all times unit 8 also comprises an actuating device 19 for moving and supporting members 10 and 12 and which presents a linear actuator 20 shown schematically in fig1 operated in steps or continuously for moving members 10 and 12 through station 3 in direction 13 to and from a respective idle position in which members 10 and 12 are located downstream from station 3 in the traveling direction from member 10 to station 3 in fig1 and are located astride station 3.