ES388524A1 - Continuous web feeding apparatus - Google Patents

Abstract

Machine for treating continuous sheets of sheet material, which are fed with continuous movement along a path through the machine, said machine comprising a plurality of carrier members, each of which has a surface for cooperation with the sheet continuous and extending parallel to each other transversely to the path of travel of the continuous sheet through the machine, said members being arranged in two groups, one on each side of said path of travel of the continuous sheet, including, by at least some of said carrying members, means for acting on said continuous sheet arranged on said cooperation surface with the continuous sheet; two guide track means, to guide each of the carrying members of one of said groups for their movement in a closed path, each of the track means comprising a part of the outward track and a part of a return track, having each front and rear ends, the going parts of said two track means extending parallel to each other on opposite sides of said path of travel of said continuous sheet and separated from each other by a certain distance to allow two opposite carrying members of different groups, when they are in opposite positions on said two parts of outward track, cooperate with the continuous sheet, holding it between opposite surfaces of cooperation with the continuous sheet; carrier feeding means at the forward ends of said forward track parts for simultaneously feeding one carrier member of each group into the respective track parts; Carrier return means at the rear ends of said forward track portions for returning the carrier members through their corresponding return track portions towards said carrier feeding means; and carrier actuating means extending longitudinally contiguous to said forward track parts to cooperate with each pair of opposing cooperating carrier members fed into said forward track parts by said feed means in order to displace said members carriers through said track parts from the front ends to the rear ends thereof, characterized in that said round-trip track parts extend substantially in the vertical direction, the carrier members being displaced downwards by said drive means of carriers through said forward track portions from upper front ends to lower rear ends thereof and by said carrier return means comprising for each of said two groups of carrier members a pair of lifting means without end arranged along and inwards of the respective pist guide ways closed to move along said tracks, said lifting means being actuated at equal speed in synchronism with said carrier feeding means and each being provided with an equal number of equally spaced protruding lifting means , adapted to cooperate with said carrier members in order to move them upward through said vertical turn track parts, each of the two lifting means of a group of carriers having, for each of the carrier members of said group, specific associated lifting cam means and corresponding cam means, which at all times maintain a common level, for all the lifting means in their upward movement, whereby the moving lifting means successively deliver two opposing group carrying members different carriers simultaneously to the carrier power means in the pa upper part of these guide tracks. (Machine-translation by Google Translate, not legally binding)