ROLLING AND BEADING MACHINE MOLINO A US
To form a tubular duct without a bead a sheet metal preform 84 of the desired shape shown by dashed lines in FIG 1 is placed on the table 60 with an edge engaging the guide post 62 The preform 84 is slid forwardly until it passes between and is engaged by the rollers 16 and 18 The rollers 16 and 18 then continue to pull the preform 84 between the rollers with the guide post 62 engaging