CERTAIN IMPROVEMENTS IN LITHOGRAPHIC PRESSES AND INKING APPARATUS CONNECTED. THEREWITH
Year: 1855

page_text: (This Invention' received Provisional Protection, but notice to proceed with the
*application for Letters Patent was not given within the time prescribed
... by the Act.) a
PROVISIONAL SPECIFICATION left by Jean Charles Guillaume Massiquot
at the Office of the Commissioners of Patents, with his Petition, on the
27th April 1855.
...
an
I, JEAN CHARLES GUILLAUME MASSIQUOT, of Paris, in the Empire of
France, and of 32, Essex Street, Strand, London, do hereby declare the nature
of the said Invention for "CERTAIN IMPROVEMENTS IN LITHOGRAPHIC PRESSES AND
INKING APPARATUS CONNECTED. THEREWITH" to be as follows:
ظيف
-
My improvements are embodied in a lithographic printing press having the
following principal parts: A sliding carriage which travels over the stone or
other engraving, and carries along the printing scraper thereby to take off the
impression, and is moved to and fro by a crank on a shaft, a loose tilting frame
which carries a plate-and-sheet- to lie down upon the paper that has been put
upon the plate to be printed from the printing scraper passing over said sheet
with the necessary pressure, and the loose tilting frame being raised or tilted
up by said carriage at the end of each backward and forward stroke, so as to
allow putting a fresh sheet of paper on the stone or plate engraved upon. The
tilting action is obtained by a catch on the carriage entering a swan neck or
hook on the tilting frame, and causing it to turn about pivots provided at the
end of the stone. The proper pressure of the carriage and scraper upon the

page_text: stone is obtained by means of a weight suspended from and travelling along
with the same, the weight acting upon the pressing scraper by being applied
to a lever of the second kind, the fulcrum of which can be adjusted so as to
produce a more or less powerful effect. For withdrawing the sheet, inking,
and putting another sheet on, the crank shaft is stopped, and the tilting frame
kept stationary in the raised position at each end of stroke by a disengaging
apparatus, which consists of a clutch box on the driving shaft. One portion of
this clutch is capable of sliding in a slot on the driving shaft; the other portion
forms part of a pinion, which is loose on the driving shaft, and gears into the
wheel of the crank shaft above mentioned. Two cams are fixed on the wheel
last mentioned, and at each revolution these cams act twice on the loose or
sliding part of the clutch box, so as to disengage it from the pinion parts, thus
causing the same and its follower to stop whilst the sheet is taken off and the
plate or stone inked again. The clutch box is thrown into gear again by
pulling a double-armed lever on which a cam is fastened, this cam acting
upon either of the cams on the wheel above mentioned, and causes the same to
pass, thus allowing the teeth of the clutch box to gear into each other by the
same motion of the lever. There is also an inking apparatus connected with
this lithographic printing press, being driven by the fly wheel or driving shaft
of the same.
This driving shaft works by means of bevel gear a horizontal
wheel, which, through a connecting rod, communicates a reciprocating motion
to a carriage with one or several inking rollers, which are preceded. by a
tympan or moistener in front. The inking rollers are thus made to pass after
each backward and forward stroke of the scraper carriage transversely over
the plate or lithographic stone so as to ink the same. The tympan is raised
out of contact during the back stroke by means of an inclined plane, suitably
fixed on the press, raising the swivel bearings of the moistener, and a hori
zontal spring slipping under them, so as to prevent the moistener from
descending again; another inclined plane throws the tympan into contact again
for the succeeding inking stroke by pushing the spring aside.