172 TIMES PRINTING MACHINE. 



other of the pinion. It has two radius bars, a, a, the ends of which are 

 fixed to the moving table, containing the form of type and inking tables ; 

 there is a centre transverse bar, b, Z>, which unites thrm, and at the other 

 ends there are two parallel guide rods, c, c, which connect the rack. 



At each end of the moving table there are smooth surfaces which are 

 called inking -tables, one of which is shown in the engraving, 0, the 

 other being under the middle inkjng-rollers; and in the centre is placed 

 the type or form, P; at each end of the side frames are two troughs, Q,Q, 

 which contain ink ; these, when filled, will hold a sufficient quantity for 

 the working off 6,000 impressions ; in each trough, there is an iron roller, 

 R, called the doctor, which is kept continually revolving by a cat-gut band, 

 S, S, over pulleys, while the machine is at work ; underneath this roller 

 there is another roller called the vibrating roller, T, which is worked by 

 an eccentric motion, and is made to receive the ink from the doctor, R, 

 and then to fall upon the inking table, O, at each termination of its 

 btroke ; by this means the ink is laid upon the table, and is afterwards 

 equally distributed over the surface by four distributing rollers, U, U, 

 at each end placed in an angular direction across the frame, which gives 

 them a transverse motion over the table, and so the ink is regularly laid 

 over the surface, and is prepared for the inking rollers, V, V, V, receiving , 

 it, two of which are on the outside of the printing cylinders, and two in 

 the centre ; these rollers have a small guide wheel at each end, upon which 

 hey revolve; they are made of iron, and are covered (as well as the 

 distributing and vibrating rollers) with a coating of composition, made 

 by certain proportions of glue and treacle ; these rollers lay the ink upon 

 the type previous to the printing rollers pressing upon it to give the 

 impression. 



On the ends of the spindles of the lying-on drums, , , c, d, there 

 are small pinions, which work on what are called shape wheels, 5, 5, 5, 5; 

 on the face of each of these wheels there is a plate that has a part of its 

 circumference removed, as shown in the engraving; upon the outside of 

 this cam or plate, are placed the ends of the laying-on levers, W,W,W,W, 

 the height of which causes them to fall into the recess in the plate, and 

 so depresses the outer end, which is kept revolving by a gut band, 

 and has four brass pulleys, toothed, that touch the paper on the laying-on 

 boards. X, X, X, X, and gradually draw it round the drums, a, b, c, d. 

 The paper is kept in its proper position by a double set of tapes, which 

 conveys it over the rollers in a zigzag direction to and from the printing 

 cylinder, the direction of which is shewn by die arrows in the Engraving. 



