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Nov. 13, 1962
Filed July 6, 1959
2 Sheets-Sheet 1
Nov. 13, 1962
Filed July 6, 1959
2 Sheets-Sheet 2
//V VE/V 7'01?
1 Ems'r ARTHUR 'rmsou
United States Patent O?tice
Patented Nov. 13., 1962
or simultaneously with, bringing about a cessation of
printing, e.g. by the separation of the printing units, dur
Ernest Arthur Tirnson, 75 Northampton Road,
ing a stoppage of the machine, the heating devices will be
automatically rendered inoperative. For instance, in the
Filed .iuiy e, @359, Ser. No. 32$,hh'7
Claims priority, application Great Britain July 11, 1958
3 Claims. (Cl. 101-247)
case of ?uid fuel, e.g. gas, burners associated ?uid fuel
valves will be automatically closed to cut off the supply
of fuel to the burners at a predetermined speed during
Kettering, England
a stoppage.
The idea of the invention accordingly is that as the
of the kind adapted to print upon a web of relatively thin 10 machine and the running web slow down during a stop
This invention appertains to rotary printing machines
and ?exible material such as paper, ?lm, foil, or the like
and the heating devices are, as a consequence, turned or
and comprising co-operable rotary printing units between
switched off, the printing shall also cease so that the web
then passing through the drying chamber will be blank and
which the travelling web passes to be printed upon and
devoid of ink. In these circumstances, there is no com
a drying Zone incorporating heating devices and through
which the web travels after having been printed upon.
15 bustible mixture of solvent and air to burn and, there
fore, no ?ame to ?re the web which latter comes safely
Thus, a machine of this kind is suitable for printing
upon a web with volatile ink or like medium, the purpose
to a stop.
in a rotary printing machine including at least one
of the drying chamber in this instance being to expedite
rotary plate cylinder co-operable with one or more im
evaporation of the solvent in the medium.
Rapid drying of inks is, for example, essential in a 20 pression cylinders, the aforementioned means in?uenced
by the speed of the machine may advantageously be in
case where a web is to be printed upon in more than one
colour, it is all the more necessary when such web is to
be printed upon in more than one colour on both sides
terlinked with one or more conventional impression cylin—
through the nozzles and, with the burner alight and fully
being shown in the “on” position in this ?gure, and
der throw-off mechanisms.
In order that the invention may be more clearly under
Although there is no limitation in this respect the in 25 stood and readily carried into practical effect, a speci?c
example thereof will now be described with reference to
vention is primarily applicable to such a rotary printing
the accompanying purely diagrammatic drawings, where
machine wherein the drying chamber is ?tted with ?uid
fuel, e.g. gas or oil, burners each of the form comprising
FIGURE 1 is a diagram of a rotary printing machine of
a pipe or manifold into Which combustible fluid fuel from
a supply is introduced and through which the said fuel 30 the kind concerned provided with means for automatically
throwing an impression cylinder off a plate cylinder dur
passes to burner nozzles spaced along it. Thus, when
ing slowing down of the machine to a stop, the cylinders
the ?uid fuel in such a burner‘is ignited, ?ame jets issue
operative these jets are directed towards an opposed sur
FIGURE 2 is a similar diagram with the impression
face of the travelling web.
35 cylinder thrown-oil.
In the drawings, the numeral 1 indicates a rotary plate
Now, as previously mentioned, solvent in ink, during
or design cylinder which is arranged to co-operate with
expedited drying by heating devices, rapidly evaporates.
an impression cylinder 2 at a printing station P in the
machine. In FIGURE 1 a Web W of paper or the like
ignites and burns without, however, overheating or 40 to be printed upon is shown being drawn from a reel R
through the station P and also through a drying chamber
scorching the web providing the latter is running at its
3 incorporating web-heating ?uid fuel, e.g. gas, burners,
normal full speed or thereabouts.
such as 4 and 5 controlled respectively by two solenoid
But if, in the event of the machine either stopping at
operated valves.
the will of an attendant or being automatically brought
For drawing the web W through the printing station
to a stop in an emergency, such as a power failure, the 45
P and the drying chamber 3 there is provided an electric
web continues to be printed upon as the speed of the ma
motor 6. Drive connections from this motor to the plate
chine slackens during the stoppage, then the residual
This rapid evaporation results in the production adjacent
to the travelling web of a combustible mixture which
ignited combustible mixture of solvent and air would burn
the printed web and cause it to catch ?re, notwithstand
ing the fact that the heating devices had been turned or
switched off.
The object of the present invention is to guard against
cylinder 1 are diagrammatically illustrated at '7, 8, 9 and
a stop, with the result hereinafter to be described.
According to this invention, means in?uenced by the
At 15 is represented the brush gear or other speed con
trol mechanism of the electric motor 6 and, as will be
seen, a process timer 16 synchronised with the mechanism
The plate cylinder 1 is mounted in stationary bearings,
and the impression cylinder 2 is adapted to be thrown on
and off the said cylinder 1 by suitable actuation of a
throw-off mechanism indicated generally at 11. This
“ this eventuality by the provision, in a rotary printing
mechanism includes eccentric bearings 12. for the shaft
machine of the kind herein referred to, of simple and
ef?cient means for automatically bringing about a cessa 55 13 of the impression cylinder 2, and connected arms 14
for turning these bearings.
tion of printing during slowing down of the machine to
speed of the improved rotary printing machine, and hence
functioning in accordance with the linear speed of the
travelling web, are so interlinked with mechanism for
bringing about a cessation of printing on the Web that
the said mechanism is automatically actuated to bring
15 is employed to initiate and time the actuation of link
age whereby the throw-o? mechanism 11 is operated
and the solenoid-operated valves associated with the gas
burners 4, 5 are controlled, at the appropriate time to
bring about a cessation of printing upon the still travelling
about such a cessation at a predetermined speed of the
machine during a stoppage thereof.
65 web W by throwing the impression cylinder 2 o? the
cylinder 1.
It is primarily the intention that a cessation of printing
shall be brought about by effecting separation of the co
operable printing units.
Alternatively, however, the
same result could be achieved by blocking the ink feed
The timer 16 is incorporated in an electrical circuit L1,
L2 and comprises a shaft 17 driven from the mechanism
15 and upon which is rigidly secured a rotary cam 18 for
to the forme on the appropriate unit. Or a combination 70 operating and controlling a switch 1'? whereby the circuit
is opened and closed. The said electrical circuit includes
of such measures may be adopted.
It is to be understood that either immediately prior to,
the said solenoids for controlling the valves associated
with the burners 4 and 5 and a solenoid 20 arranged to
in?uence an air valve 21 which, when suitably actuated
at the dictates of the timer 16, passes air into the cylinder
movement to and away from a cooperative printing en
gagement, driving means for feeding a traveling web
through said printing cylinders, throw-01f means for mov
of a pneumatic cylinder and piston device 22, 23 arranged
ing said plate and impression cylinders selectively to and
to impart motion to the arms 14 serving to operate the
throw-01f mechanism.
away from their cooperative printing engagement, syn
chronous means controlled by the speed of said driving
means and cooperatively controlling said throw-o?f means
Alternatively, hydraulically or electrically operated
means may be provided to actuate the throw-o? operat
ing linkages under the control of a timing mechanism in
?uenced by the speed of the machine.
Whenever the machine is started up, the initially sepa
rated co-operable rotary printing cylinders 1 and 2 will
for automatically shifting said cylinders away from said
cooperative engagement when the driving means feeds the
web at a speed less than predetermined speed and for
automatically shifting the cylinders into said printing en
machine and the web W have attained a speed at which
it is safe to apply the heat, e.g. the same speed at which
gagment when the driving means feeds the web at a speed
at least as great as said predetermined speed, heating
means for drying the printed web after the web is fed
from said cylinders, and means actuated by said syn
chronous means and controlling said heating means for
the said cylinders are automatically thrown-01f during
stopping of the machine.
The complete arrangement illustrated in the drawings
selectively applying heat to the web when the cylinders
are in printing engagement and shutting off the heat when
the cylinders are shifted away from said printing engage
includes an inking unit 24 which is movable bodily to
wards and away from the cylinder 1, and means inter—
linked with the control for the throw-o?? mechanism 11
not be thrown-on to commence printing and the burners
4 and 5 will not be brought into operation until the
2. The rotary printing machine of claim 1 in which
said throw-off means comprises eccentric cam means for
whereby whenever the impression cylinder 2 is thrown off
shifting one of said printing cylinders into and away from
the cylinder 1 during a slow down of the machine, the
inker unit 24 will also be automatically moved back clear
of the cylinder 1. Conversely, the arrangement is also
such that, during a start, the impression cylinder 2 will
printing engagement with another printing cylinder, pneu
be thrown on to the plate or design cylinder 1 (at a pre
determined linear speed of the web W) simultaneously
matic control means for operating said cam means, and
a solenoid controlled valve operating said pneumatic
3. The rotary printing machine of claim 2 in which
said driving means comprises electrically driven motor
with a forward movement of the inking unit into its work 30 means and drive connections from the motor means to
one of said printing cylinders, and said synchronous
means comprises a speed actuated electrical switch operat
ed by said motor means and electrically connected to
forms no part of the present invention, nevertheless it
operate said solenoid control valve.
will be useful to observe that the same electrical circuit
References Cited in the ?le of this patent
L1, L2 previously described herein and represented in the
drawings includes another solenoid in?uenced air valve 25
ing station adjacent to the cylinder 1. Although this
particular feature is separately covered in co-pending
United States application No. 827,613 and accordingly
which, through the medium of a pneumatic cylinder and
piston device 26, 27 operates connections 28, 29, 30 and
31 (which it is unnecessary to describe in detail in the 40
present case) for moving the inking unit 24 back and
I claim:
1. A rotary printing machine comprising in combina
tion plate and impression cylinders for printing on a 45
traveling web, said cylinders being mounted for selective
Cohen ______________ __ Apr. 27, 1920
Kelly ________________ __ May 1, 1928
Molins _______________ __ Aug. 6, 1929
Barber _______________ __ June 4,
Feldhauser ___________ .._ June 30,
Crafts _______________ -._ Jan. 25,
Baumgartner _________ __ June 29,
Harless _______________ __ Jan. 7,
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