Improvements in Printing Machines.
Year: 1893

page_text: Date of Application, 21st Dec., 1893
Complete Specification Left, 11th Sept., 1894-Accepted, 13th Oct., 1894
PROVISIONAL SPECIFICATION.
Improvements in Printing Machines.
1, JULES MICHAUD, of 98 Rue d'Assas, Paris, France, Engineer, do hereby
declare the nature of this invention to be as follows:-
The present improvements are applicable to rotary colour printing machines.
As an example of the machine to which such improvements may be applied, I
will take that described in the Specification of my prior Patent No. 12290
A.D. 1891.
In such machine the web of paper after having received an impression on one
side passes over a certain number of blanket cylinders which are in contact with
one or more printing cylinders, so as to receive on the opposite side impressions of
different colours.
In order to prevent the first impression made on the web of paper soiling the
different blanket cylinders over which it passes in order to receive the succeeding
impressions, in the Specification of such prior Patent I have shown that over the
blanket cylinders I cause an off-set web of paper to pass, such web being unwound
by the travel of the machine, and rewound by the means I have indicated in such
Specification. Such arrangement is applicable to web printing machines, that is to
say to machines in which a continuous web of paper from a reel passes through the
machine, and is printed and then cut after printing.
The object of the present invention is to enable printing in several colours to be
effected by such machine on sheets which are cut before printing, such sheets being
either equal to or less than the development of the printing cylinders. The cut
sheets may be either fed to the machine by hand, or they may proceed from a reel
and be cut in the machine itself and conveyed to the printing cylinders by kncwn
means.
After being cut and receiving an impression on one side, the separated sheet
comes in contact with the off-set web above referred to.
In order to ensure an exact register of the different colours which the separated
sheet is to receive, I attach same to the off-set web so that it passes with the latter
over the blanket cylinders, on which it will receive the impression from the printing
cylinders corresponding therewith.
For this purpose, either before or during the unwinding of the off-set web, I coat
same with a substance such as wax, or other substance such that when the sheet is
applied to the web covered with same, it will become fixed and remain attached
thereto during the whole time it is receiving the impressions, after which it may be
detached therefrom and conveyed to the folding and delivery apparatus of the
machine.
In order to ensure the separated sheet adhering firmly to the coated web,
I cause both of same to pass between two rollers or between a roller and
pressure pads.
Instead of coating the off-set web I may coat the web to be printed at certain
points, so that when same comes in contact with the off-set web it will by the action
of the pressure rollers become attached thereto.
I
may further ensure the adherence of the paper to the off-set web by piercing
the two thicknesses of paper superposed one on the other, either in the machine
itself or outside the machine, the paper round the holes being folded back to hold
the sheet on the off-set web, or any other suitable means may be employed for
attaching the sheet to the off-set web.

page_text: It will be apparent that when the sheet is not required to receive a first
impression before being printed in colours, I may cause same to at once come in
contact with the carrying web and attach same thereto in the manner above
described.
1 may also employ endless cords or tapes for conveying the separate sheets to
the different cylinders, such cords or tapes-of fabric, leather or metal-carrying
points which will pierce the paper and ensure same being conveyed in a regular
manner to the different cylinders. These cords or tapes being arranged in the
blanks or unprinted parts of the sheet will carry the latter forward through the
machine, while by reason of the points which pierce the sheet, the latter will be
prevented during its whole travel from slipping and thus being held back in
relation to the cords or tapes which carry it forward.
Dated this 21st day of December 1893.
ALLISON BROS.,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Printing Machines.
I, JULES MICHAUD, of 96 Rue d'Assas, Paris, 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:
The object of this invention is to enable the printing in one or in several colours
on a rotary printing machine of sheets which have been cut in advance, the sheets
proceeding from a reel, or fed by hand and being of variable dimensions.
Fig. 1 of the accompanying drawings shows the principal arrangements of my
invention.
The cut sheets, whether same have been fed by hand or proceed from a reel
after having passed through a cutting apparatus, arrive at 1, where they are seized
by the grippers carried by the cylinder 2, or are applied to such cylinder by means
of tapes; they are printed on one side by contact with the printing cylinder, then
are detached from the cylinders 2 and 3 by tapes passing over these cylinders and
are then applied to the continuous web 4 which proceeds from a reel 5.
The continuous web 4 passes over a cylinder 7 on which bears another cylinder
or discs 6 made of a substance such as wax or any other analogous substance,
susceptible of being deposited on the web for the purpose afterwards described, the
application of this substance might also be made by tapes such as 8 which pass
round a cylinder 9, which dips into a basin or tray containing a substance suitable
for coating the web 4.
I may employ a reel 5 made of a web which has previously been coated with the
substance which I desire to use.
When the sheet has been applied to the continuous web, they pass together
between two cylinders or rollers 10 and 11 of which the pressure causes the
adherence of the sheet on the continuous web, so that they always pass together
and securely fastened one to the other over the blanket cylinders 12 and 13 in
contact with the printing cylinders 14, 15, 16, 17.
There might be more blanket cylinders and corresponding printing cylinders in
the travel of the web if this is necessary.
When the last impression is obtained on the sheet which is applied to the web 4,
the latter is rewound at 20 by the means described in the Specification of my prior
Patent No. 12290 dated 20th July 1891, or by any other suitable means, whilst
the sheet, detached by the blades 18 which rub against the continuous web, is seized
by the grippers of a cylinder 19 or descends between tapes which convey it to
folding or delivery apparatus.

page_text: Instead of spreading the coating on the web 4 I may place same on the sheet 5
either in advance or during the travel of the latter, before it meets the web 4; I
might for example have rollers at 21, which revolving in a tray containing the
adhesive material, would deposit it on the sheet 5 when it passes over the
cylinder 2.
It will be seen by the preceding description that, since in consequence of the
mode of causing the continuous web to travel through the printing machine, I can
produce an exact register of the colours, I shall obtain the same exact register
on separate sheets, as the latter during the whole period of the impression of
the different colours will form part of the continuous web which serves to support
them.
I may further cause the sheet to be printed to adhere to the continuous web
without either the one or the other having been previously coated, by providing
the rollers 10 and 11 between which they pass, the one with points and the other
with counterparts, so that the two thicknesses of paper being pierced together and
the rough edge formed on each side of the hole flattened down so as to bind them
together like an eyelet would, they will be thus sufficiently secured to remain
together during the whole period of the printing.
It will be evident that if I utilize the off-set web in the case when the sheet is to
receive a first impression before the impressions in colours, 1 may, if the sheet is to
be printed on one side only or first in colours, make use of the supporting web for
the impression of the first side of the sheet.
In order that the sheets may have no tendency to be dragged along by the
different printing cylinders by reason of the adherence of the ink, I pass round
these cylinders tapes such as 35, 36, which ensure the separation of the sheets from
the cylinders.
I may further in place of the travelling web employ cords or tapes of fabric,
leather, or metal which, being placed round the cylinders in the parts whore there
will be no
impression will carry the sheets forward. These cords or tapes are of
the same kind as those employed in printing machines for conveying the sheets to
the different parts; they work in pairs one above the sheet, the other below; the
characteristic of those which I employ is that one of them is provided with points
which perforating the sheets will fix them so that they cannot become displaced in
relation to the tapes during the whole of their travel over the printing cylinders,
thus ensuring an exact register of the different colours received by the sheet. I
have indicated this arrangement in Fig. 2 of the drawings.
The sheets arriving at 24, and passing between the rollers 25 and 26, are
carried forward by the tapes or cords 22 and 23, the former provided with points;
they pass thus over the blanket cylinders 27 and 28 which are in contact with
the printing cylinders 29, 30, 31, 32, and are then seized by the grippers of a
cylinder 33, which releases them at 34 to enable them to pass to delivery or folding
apparatus.
Having now particularly described and ascertained the nature of my said inven-
tior, and in what manner the same is to be performed, I declare that what I
claim is :-
:-
1. The combination with the different cylinders of a printing machine for
printing in several colours of a continuous web of paper or fabric, serving to
support the sheets to be printed which are introduced into the machine, the sheets
or the continuous web having been previously covered either wholly or partially
with a coating suitable to produce the adherence of the web and the sheets after
the passage between pressure cylinders or rollers.
2. The combination with the printing cylinders of a machine for printing in
several colours, of a continuous web and suitable apparatus for producing the
adherence of the web and of sheets to be printed, such apparatus piercing holes,
forming eyelets or producing the adherence in any suitable manner.
3. The combination with the cylinders of a machine for printing in several

page_text: colours of endless tapes or cords of any suitable substance between which the sheets
to be printed are seized and carried forward through the machine, these cords or
tapes being provided with points which fix the sheets during the whole of their
travel between the printing cylinders and thus render them part of such cords
or tapes.
Dated this 11th day of Santambor 1804
ALLISON BROS.,
Agents for the Applicant.