Lever 8 is connected by turning pairs F and G to bellcrank 9 of four-bar linkage BCDE and to lever 2 which turns about fixed axis H. Ratchet wheel 3 rotates about axis H. When crank 1 on the mainshaft rotates about fixed axis B, lever 2 is oscillated with pawl d pivoted on the lever. When lever 2 turns counterclockwise, pawl d turns ratchet wheel 3 through a certain angle, thereby turning duct roller 4 whose surface is inked. Ink feed to the type is regulated by varying the angle of rotation of the duct roller. Ink for printing is put into box 5 having three side walls, the fourth being duct roller 4. Inking plate 6 is close to the roller underneath, forming a narrow slit. The width of the slit is adjusted by screws 7.
$1856$LR,FD$