The method consists in collecting products (2) that are arriving spaced and in line on a conveyor (1). This collection is carried out by means of a collector device (40), in the form of a comb, arranged transversally, forming an angle between 60 and 120° in relation to the product advancement direction (2).The collector (40) deposits and drops the collected products at a take-up station which is located on the side of said supply conveyor (1); it is capable of a loop movement that can be divided, for the collecting of said products, into a transversal movement combined with a longitudinal movement upwards of the vial queue.The installation for the implementation of the method comprises a table (3) arranged at the level of and along the conveyor (1), a collector (40) carried by an appropriate structure in order to be displaced longitudinally and transversally above said conveyor (1) and said table (3).The table (3) is comprised of two panels (31, 32) which extend on either side of the supply conveyor (1) in order to allow for the depositing and a dropping of the collected products on each side of said conveyor (1).