IMPROVEMENTS IN PRINTING MACHINES
Year: 1866

page_text: .
PROVISIONAL SPECIFICATION left by William Rock at the Office of
the Commissioners of Patents, with his Petition, on the 8th February
1866.
I, WILLIAM ROCK, of Harp Lane, in the City of London, Printer,
do hereby declare the nature of the said Invention for "IMPROVEMENTS IN
PRINTING MACHINES," to be as follows:-
My Invention consists in constructing machines for printing on one or
both sides of sheets of paper or other fabric, and in a new arrangement
and combination of machines whereby many colors may be printed. My
Invention also consists in means of securing curved stereotype and other
blocks upon type cylinders, and in apparatus for cutting paper or other
fabric after having been printed when the feed is from a continuous web of
fabric; also in a frisket or apparatus for piling paper, all as hereafte
explained.
I form my type cylinders or those on which the curved blocks carrying
the matter to be printed are fixed with bearers at the ends, that is, with
collars, between which the cylinders are of less diameter to allow of the
insertion of the curved blocks; these blocks are secured by the over-
lapping edges of frames adjustable round and across the blocks, they are
secured to the cylinders by screw bolts, and are slotted to allow of their
position being altered as required; the screwing down of the bolts fixes
the frames until readjustment or removal of the blocks becomes necessary.

page_text: Over the type cylinder I fix an inking or coloring apparatus, which consists
of two diagonally grooved rollers, the grooves in one roller run in the
contrary direction to those in the other; these receive the ink or color,
and pass it to small rollers, which in turn transmit it to an interior wooden
distributing roller, from whence two rollers transmit it to the face of the
curved blocks. Under the type roller is the impression or blanket roller,
and for paper to be printed on one side only and in one color the machine
is complete. For printing on both sides the paper or fabric on being
printed on one side is received on another blanket cylinder, which also
serves as a carrying roller, and the paper passes between it and a second
type cylinder constructed similarly to that described. A similar ink
or color apparatus at the side of the machine supplies the last-named type
cylinder.
For printing in many colors I use a separate color apparatus for every
pair of type and blanket cylinders, and use between every such pair a
carrying roller for carrying the paper from pair to pair. The paper or
other fabric to be printed may be supplied in separate. lengths or from a
continuous.web, and in the latter case when the printing is finished the
paper passes between a pair of rollers, at the back of which there is a
straightedge in order to its being cut or severed from the rest of the web.
A shaft carries a cutting blade, the revolutions of this shaft are so regu-
lated as to bring this blade in contact with the straightedge, and so sever
the paper at the proper moment. On the same shaft as the blade I fit one
or more fingers of vulcanized caoutchouc, which follow the blade and direct
downwards the paper between the lower roller and another roller, where
the paper is taken by a web or type, and is carried down to a frisket
whereby it is piled; or it may be passed over drying cylinders.
1
The frisket consists of a light metal or wire frame, the parts of which
are hinged together and act in such manner that upon the sheet of paper
reaching the end of its course a cam causes the frisket to move, bringing
it down on the sheet, thereby laying the sheet flat and piling successive
sheets upon it; the sides of the frisket are so hinged that on coming in
contact with a stop they fold and rise without interfering with the next
descending sheet.