AN IMPROVED METHOD OF PRINTING LITHOGRAPHIC, TYPOGRAPHIC, AND OTHER IMPRESSIONS ON PAPER, SKIN, OR OTHER FLEXIBLE FABRIC OR SURFACE, AND APPARATUS FOR THAT PURPOSE."
Year: 1881

page_text: LETTERS PATENT to John Imray, of No, 28, Southampton Buildings, Chancery
66
Lane, in the County of Middlesex, for an Invention of AN IMPROVED
METHOD OF PRINTING LITHOGRAPHIC, TYPOGRAPHIC, AND OTHER IMPRESSIONS
ON PAPER, SKIN, OR OTHER FLEXIBLE FABRIC OR SURFACE, AND APPARATUS
FOR THAT PURPOSE." A communication from abroad by Ferdinand Champenois
and Ernest Missier, both of Paris, in the Republic of France.
PROVISIONAL SPECIFICATION filed by the said John Imray at the Office
of the Commissioners of Patents on the 5th March 1881.
JOHN IMRAY, of No. 28, Southampton Buildings, Chancery Lane, in the County
of Middlesex. "AN IMPROVED METHOD OF PRINTING LITHOGRAPHIC TYPO-
GRAPHIC, AND OTHER IMPRESSIONS ON PAPER, SKIN, OR OTHER FLEXIBLE FABRIC
OR SURFACE, AND APPARATUS FOR THAT PURPOSE." [A communication from
abroad by Ferdinand Champenois and Ernest Missier, both of Paris, in the
Republic of France.]
According to this Invention printing on paper, skin, or other flexible fabric or
surface is effected not directly from the lithographic stone, engraved plate, or type
forme, but from an elastic surface, such as a sheet of caoutchouc or elastic fabric.
which has received the impression, this indirect printing having the effect of
dispensing with the moistening of the printed material and of securing great
clearness of impression, particularly when colours are used, and great accuracy of
register. In apparatus for printing in this indirect manner there are two impression
cylinders, the one having its blanket stretched over it as usual, and over the
blanket a stretched sheet of caoutchouc or elastic fabric susceptible of impression.
The stretching of both may be effected by passing a loop of them at one end
round a fixed bar and straining the other end of each by winding it on a square or
polygonal spindle held from unwinding by a ratchet and pawl. The first
impression cylinder revolves in contact with the lithographic stone or forme,
receiving therefrom an impression on its elastic covering.
The second impression cylinder revolves in contact with the first, and by means
of grippers carries the paper or other material to be printed through between the
two cylinders, the impression being thus transferred from the elastic surface of the
first cylinder to the paper or other material passed between the two cylinders.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said John Imray in the Great Seal Patent Office on the 1st September
1881.
<<
JOHN IMRAY, of No. 28, Southampton Buildings, Chancery Lane, in the County
of Middlesex. AN IMPROVED METHOD OF PRINTING LITHOGRAPHIC, TYPO-
GRAPHIC AND OTHER IMPRESSIONS ON PAPER, SKIN, OR OTHER FLEXIBLE FABRIC
OR SURFACE, AND APPARATUS FOR THAT PURPOSE." A communication from
abroad by Ferdinand Champenois and Ernest Missier, both of Paris, in the
Republic of France.
According to this Invention printing on paper, skin, or other flexible fabric or
surface is effected not directly from the lithographic stone, engraved plate, or type
forme, but from an elastic surface, such as a sheet of caoutchouc or elastic fabric,
which has received the impression, this indirect printing having the effect of
dispensing with the moistening of the printed material and of securing great
clearness of impression, particularly when colours are used, and great accuracy of
register. In apparatus for printing in this indirect manner there are two impression
cylinders, the one having its blanket stretched over it as usual, and over the blanket
a stretched sheet of caoutchouc or other elastic fabric, susceptible of impression. The
stretching of both may be effected by passing a loop of them at one end round
a fixed bar and straining the other end of each by winding it on a square or
polygonal spindle held from unwinding by a ratchet and pawl. The first impression
cylinder revolves in contact with the lithographic stone or forme, receiving there-
from an impression on its elastic covering. The second impression cylinder revolves
in contact with the first, and by means of grippers carries the paper or other
material to be printed through between the two cylinders, the impression being
thus transferred from the elastic surface of the first cylinder to the paper or other
material passed between the two cylinders.
The accompanying Drawings shew so much of a lithographic indirect printing
. machine as is necessary to explain this Invention. Fig 1 is a part side view and
Fig 2 is an end view of the printing cylinders; Figs. 3 and 4 are part sections to
an enlarged scale shewing the mode of fixing and tightening the covering of the
cylinder A. This cylinder is as usual covered by a blanket B of caoutchouc or
other suitable elastic fabric, and over this is another caoutchouc blanket C which
is to receive the impression. The blankets are at their front ends looped round a
bar d held by studs e projecting inwards from the cylinder, and their other ends
are secured to separate tightening barrels a, and a¹ provided with ratchets b, b¹,
and pawls c, c¹. Against the cylinder A the second cylinder D is pressed by
springs facting on its bearings, to which there are regulating screws g. The two
cylinders A and D are caused to revolve together by gearing wheels E and F on
their respective shafts. The paper or other fabric to be printed being fed from y,
or in the direction y¹, to grippers he worked in the usual way is carried through
between the two cylinders A and D, receiving the impression transferred to it
from the former. The grippers h are arranged to open when the cylinder D is in
the position shewn in Fig. 1, the whole sheet having passed the contact with A,
and hanging, as indicated at x, so that it can be raised and deposited on the
table G. For effecting register, studs with rounded ends may be used, as indicated
in Fig. 5, so as to enter a corresponding impression c¹ on the sheet; or preferably
the studs terminate with an angle, as shewn in Fig. 6, entering a corresponding
impression l.
Having thus described the nature of this Invention, and in what manner the
same is to be performed, as communicated to me by my foreign correspondents,
I claim,―
First. The herein described method of indirect printing by first taking from a

page_text: lithographic stone or from a forme an impression on elastic material covering a
primary cylinder, and then transferring the said impression to a sheet passed
between the primary cylinder and a second or impression cylinder pressed
against it.
Second. The combination in a lithographic or other press of a primary cylinder A
with its impressionable covering and a secondary impression cylinder D, arranged
and operating substantially as herein described.
In witness whereof, I, the said John Imray, have hereunto set my hand
and seal, this Tenth day of August, in the year of our Lord One thousand
eight hundred and eighty one.
JOHN IMRAY. (L.S.)