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TRANSACTIONS OF THE 



Babcock's Polychromatic Printing Press. 



JVo. 1027 — Polychromatic Printing Press. 

 A. M. & G. H. Eabcock, Westerly, R. I. This invention is in- 

 tended for printing several colors at one operation. It consists 

 of a square prism, around which the beds, three in number, are 

 arranged, leaving the fourth, or upper side of the prism for feed- 

 ing and flying the sheets. There are three sets of inking appara- 

 tus — one for each bed, and each for a separate color — which pass 

 twice across the forms betweeen the impressions ; at the same 

 time the prism is rotated one-fourth of a revolution, thus changing 

 the sheets from one form to another. At every movement of the 

 prism, a finished sheet arrives at the top, when it is removed by 

 the operator, and a clean one supplied. The sheets are clamped 

 upon the platen, or prism, by means of friskets, and held immov- 

 able until they have received all the colors, tlius insuring a per- 

 fect register. A very ingenious machine. Has the advantage of a 

 perfect register, with a saving of labor, and without the injury to 

 the sheets by the frequent handling, as in former modes. Worthy 

 of reward. [Silver medal awarded. 



