PAPER- CUTTING 



475 



into strips of such width as may be required, according to the number of the circular 

 cutters and distances between them. 



1587 



The strips of paper proceeding onward from between the knife-roller, d, and 

 presMng-roller, /, conducted by tapes, until they reach a fourth roller, g, when they 

 are allowed to descend, and to pass through the apparatus designed to cut them trans- 

 versely; that is, into sheet-lengths. 



The apparatus for cutting the strips into sheets is a sliding knife, placed horizon- 

 tally upon a frame at h, which frame, with the knife c, is moved to and fro by a 

 jointed rod, i, connected to a crank on the axle of the pulley Jc. A flat board or plate, 

 I, is fixed to the standard frame in an upright position, across the entire width of the 

 machine, and this board or plate has a groove or opening cut along it opposite to the 

 edge of the knife. Tho paper descending from the fourth roller, g, passes against 

 the face of this board, and as the carriage witli the knife advances, two small blocks, 

 mounted upon rods with springs, m m, come against the paper, and hold it tight to 

 the board or plate I, while the edge of the knife is protruded forward into the groove 

 of that board or plate, and its sharp saw-shaped teeth passing through the -paper, cut 

 one row of sheets from the descending strips ; which, on the withdrawing of the 

 blocks, fall down, and are collected on the heap below. 



The power for actuating this machine is applied to the reverse end of the axle on 

 which the pulley k is fixed, and a band, n n n n, passing from this pulley over 

 tension-wheels, o, drives the wheel, q, fixed to the axle of the knife-roller, d ; hence 

 this roller receives the rotatory motion, which causes it to conduct forward the 

 web of paper ; but the other rollers, c and /, are impelled slowly by the friction of 

 contact. 



Tho rotation of the crank on the axle of k, through the intervention of the crank- 

 rod i, moves the carriage ft, with the knife, to and fro at certain periods, and when the 

 spring blocks m come against the grooved plate /, they slide their guide rods into them, 

 while the knife advances to sever the sheets of paper. But as sheets of different 

 dimensions are occasionally required, the lengths of the slips delivered between each 

 return of the knife are to be regulated by enlarging or diminishing the diameter of 

 the pulley k, which -will of course retard or facilitate the rotation of the three con- 

 ducting rollers, c, d,J, and cause a greater or less length of the paper to descend 

 between each movement of the knife carriage. 



The groove of this pulley k, which is susceptible of enlargement, is constructed of 

 wedge-formed blocks, passed through its sides, and meeting each other in opposite di- 

 rections, so that on drawing out the wedges a short distance, the diameter of the pulley 

 becomes diminished ; or by pushing the wedges further in, the diameter is increased ; 

 and a tension wheel, p, being suspended in a weighted frame, keeps the band always 

 tight. 



