cy printing machines
Year: 1886

page_text: I, AUGUSTE PARRIZY, of No. 6 rue Taylor, Paris, in the Republic of France,
Engineer, do hereby declare the nature of this invention, and in what manner
the same is to be performed, to be particularly described and ascertained in and by
the following statement:-
My invention for improvements in cylinder printing machines relates to that
class of machines which print on a continuous roll of paper and has for object to
provide improved means whereby the size of the printed sheet can be varied and
its register corrected in the two directions, horizontal and vertical.
In the accompanying sheet of drawings
Fig. 1 is an elevation of a cylinder printing machine constructed according to
this invention.
Figs. 2, 3, 4, 5 are detail views of the cylinder carrying the forms of type or
stereotype plates; and
Figs. 6, 7 are detail views of the impression cylinder.
The main frame is composed of parallel similar standards A connected by a
platform Y which is reached by a ladder or other suitable means. The paper to be
printed on is in the form of a continuous sheet wound upon a roller to form the
bobbin B.
As the arrangements of type and impression cylinders on the two sides of the
machine are identical, I shall only describe one arrangement, similar letters of
reference denoting similar parts.
The type or printing cylinder C carrying the forms of type or stereotype plates is
supported in bearings mounted on the systems of rocking levers c, d, e by means
of which any desired constant pressure can be exerted between the type and
impression cylinders. The lever è may be replaced by a spring acting on the rod d
which can be lengthened or shortened by means of the screw as clearly shown to
regulate the said pressure. The standards A are recessed as shown so that the
type cylinder C can be readily removed. The type cylinder C is inked in the
ordinary manner by means of the apparatus E E V FG H.
The impression cylinder D is mounted in bearings M capable of sliding in
grooves I in the standards A and is geared to the type cylinder so as to have the
same circumferential velocity. The grooves I are terminated by caps J forming
.

page_text: nuts for the screws K which secure the bearings M firmly in position. When
required to raise the cylinder D, the screws K are loosened and the cylinder D
aised, for example, by means of chains attached to the bent levers N. The
blocks L can then be taken from above and placed underneath the bearings M
which can then be lowered on to the blocks 80 that the cylinder D can be turned
by and to allow of inspection. The type cylinder C can also be readily inspected
and the forms of type corrected whilst the cylinder D is in this raised position.
It will readily be seen that the above described arrangement of the type and
impression cylinders permits of the use of type cylinders of different sizes upon the
same machine so that the size of the printed sheet can be varied at pleasure and
facilitates the fixing of the forms of type or stereotype plates. If desired, even,
the type cylinder can be removed from the machine for this latter purpose and can
when set be readily inserted in position or it may be replaced by a type cylinder
of a different size.
When the printing machine is in operation, the endless sheet of paper from
the bobbin B, unwinds in the direction indicated by the arrow a and passes over
the stretching roller b which slightly resists the unrolling of the paper. The
sheet then passes between the type cylinder C and the impression cylinder D
where it is printed on the underside at the point f where the cylinders C, D, touch
one another. It then rises in the direction of the arrow and passes in succession
over the rollers h, h¹ which serve to guide the sheet and dry the freshly made
impression. It will be seen that these rollers h, h¹, bear on the blank side of the
paper so that the fresh impression encounters nothing which would tend to injure
it. The sheet then passes between the type and impression cylinders C¹ D¹,
which are similar to the cylinders C, D, respectively and where its other side is
printed on. As the impression cylinder D bears on the first, printed side of the
sheet, means for cleaning it are provided-consisting of an endless sheet running
over pulleys X X and in contact with the cylinder D¹. The sheet then passes
upwards and over the guiding and drying rollers ¹, j, to the cutting machine-
the fresh impression being on the outside so as not to come in contact with any-
thing which would injure it.
The rollers, h, h¹, j, j¹, are hollow and arranged so that a hot fluid such as water,
steam or air can be passed through them to aid in drying the impressions.
The correspondence of the register of the two sides of the sheet is obtained by
means of the adjusting screws r, r¹ acting on the bearings of the type cylinders
for the vertical lines and of the gearings and screws operated by the hand
wheels t, t¹, by means of which the rollers h, h¹, are raised or lowered, for the
horizontal lines.
The cutting machine is of an ordinary construction and comprises a blade
carrying cylinder O which is driven from the printing machine at such a speed that
it cuts the sheets into lengths equal to the length of the circumference of the
type cylinder. R R are guide rollers; S a tension roller; P, P, Q, Q, four rollers
over which pass two endless belts between which the cut sheets pass to the
receiving table T.
The size of the printed sheet can be varied by changing the type cylinder and
its gearing; or by securing on the base J¹ (figs. 2, 3, 4, 5) different sized covers k
constructed in one or two pieces and changing the gearing on the shaft i to
correspond with the cover. The cover is grooved helicoidally, the grooves being
of dovetail form in cross-section to hold the blocks and forms of type.
The diameter of the impression cylinder can be varied in the same manner, the
cover (figs. 6, 7) being smoothed and covered with a blanket 7 secured in position
and kept stretched in the ordinary manner by means of a ratchet-cam and pawl as
shown.
If desired the machine may be arranged to print in several colours, the diameter
of the impression cylinder being increased sufficiently to allow of two or more type
cylinders being placed under it, the number of type cylinders corresponding to the
number of colours employed. The type cylinders must all be of the same size and

page_text: their development exactly equal to the size of the printed sheet.
cylinders have the same circumferential speed as the impression cylinder.
These type
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is
1. In cylinder printing machines, mounting the type cylinders on systems of
rocking levers below impression cylinders mounted in bearings capable of sliding
in the main frame so that the pressure between the type and impression cylinders
shall be constant and independent of the impression cylinders and that the
diameter of the type cylinders can readily be varied to vary the size of the printed
sheet.
2. In the machine specified in claim 1, the arrangement of the rollers serving to
stretch, guide and dry the paper and to correct the register for the horizontal
lines, in combination with the endless sheet for cleaning that impression cylinder
which bears on the printed side of the paper and with the screws for adjusting
the bearings of the type cylinders to correct the register for the vertical lines.
WHEATLEY & MACKENZIE,
Agents for the Applicant,
156, Strand, London, W.C.