Device and method for eliminating trimmings from series of products, such as rolls or the like

Device as claimed in one or more of the previous claims, characterized in that at least some of the contact members (29) are provided with a contact surface for the products having a low friction coefficient, to allow said products to slide with respect to said supporting members.

Device as claimed in one or more of the previous claims, characterized in that said flexible member (23) is controlled at a variable speed to accelerate at least the last product (RN) of each series with respect to the pusher therebehind (11).

Device as claimed in one or more of the previous claims, characterized in that said flexible member (23) is controlled at a variable speed to accelerate and, if necessary, subsequently decelerate at least the first product (R1) of each series with respect to the subsequent product.

Device as claimed in one or more of the previous claims, characterized in that said flexible member (23) is controlled to advance at a lower speed or to stop during an interval of time between arrival of the first product (R1) and arrival of the last product (RN) of each series, during said interval of time the products being pushed by said pusher (11) and sliding along the flexible member (23) resting on the contact members (29).

Device as claimed in one or more of the previous claims, characterized in that said flexible member (23) and said longitudinal supporting element (21) are arranged one above the other.

Device as claimed in one or more of the previous claims, characterized in that said flexible member (23) is controlled to be accelerated synchronously with the position of said pusher, to distance the last product (RN) of each series from the pusher therebehind.

Device as claimed in one or more of the previous claims, characterized in that said flexible member (23) is controlled to be accelerated synchronously with the position of said pusher, to distance the first product of each series at least temporarily from the subsequent product.

Device as claimed in one or more of the previous claims, characterized in that said flexible member (23) includes a pair of parallel chains, one of said chains being provided with a plurality of intermediate contact members (29), said intermediate contact members being arranged in a laterally staggered position with respect to said longitudinal supporting element (21).

Device as claimed in one or more of the previous claims, characterized in that said at least one pusher has a slot (11A) in which the longitudinal supporting element (21) penetrates when said pusher pushes the products between the longitudinal supporting element and the flexible member.

Device as claimed in one or more of the previous claims, characterized in that said products are rolls obtained from cutting a log.

Method to eliminate head and tail trimmings (Rt, Rc) from a series of aligned products (R, R1, RN), wherein a series of products is pushed by a pusher (11) between a longitudinal supporting element (21) and a continuous movable flexible member (23) equipped with contact members (29, 29A, 29B), said contact members being in contact with the products which advance between said flexible member and said longitudinal supporting element, said flexible member having a section devoid of contact members at the level of the head and tail trimmings (Rt, Rc) of said series of products to cause said trimmings to fall, characterized in that said flexible member (23) is controlled at a variable speed to carry the section thereof devoid of contact members every time to the level of the head and tail trimmings (Rc;

• Rt) of two consecutive series of products.