Year: 1888

page_text: Date of Application, 5th June. 1888
Complete Specification Left, 5th Mar., 1889
Complete Specification Accepted, 6th Aor., 1889
do hereby declare the nature of this invention to be as follows:-
This invention has reference to a former invention described in Specification No. 9525
of 1887 and the present improvements relate
-
1st. To arrangements whereby the speed of the machines can be increased.
2nd. To arrangements whereby the production of the machines can be increased by
utilizing each of the cylinders for printing 2 formes on the obverse and reverse sides
of the sheet, the sheet being cut in two after the printing.
3rd To arrangements whereby the set-off sheet is automatically separated from the
printed sheet and removed mechanically.
4th To arrangements whereby the machines can be utilized as stop cylinder single
machines
I will first explain the arrangements whereby the speed of machines of the character
of those described in Specification No 9525 of 1887 can be increased. These
machines should in principle have the circumference of the cylinders equal to the
travel of the bed in one direction and the larger the cylinder is the more is the speed
limited. The stopping of the cylinder becomes more difficult in proportion to the
increase of the diameter of the cylinder while the bed being driven directly by a crank
movement can easily stand an increased speed.
The large size of the cylinder on the contrary causes a difficulty in the movement
of the stop finger. In order to overcome this difficulty I considerably reduce the
diameter of the cylinder by means of the following arrangements.
First. I begin the printing a little below the line of the centres of the cylinders.
The cylinders being of large diameter it will be understood that their_circumference
forms in a manner a straight line a little below and above the centre. I can therefore
cause the grippers to act a little below the centre with as much exactness as if they
acted at the centre itself. Now a distance of 25 to 30 millimetres gained under these
conditions shortens the travel about 10 centimetres, this difference of 25 millimetres being
calculated on the quarter of the circumference between the line of the centres of the
2 cylinders and the point of contact of the cylinder with the bed.

page_text: Secondly. The cylinder has really no need for a circumferential travel exactly equal
to the bed that carries the formes as in the part where the contact exists between them
for printing the sheet, I therefore place on the bed a rack gearing with a sector on
the cylinder in the part corresponding to the quarter turn necessary to bring the head
of the sheet in contact with the bed and in the part corresponding to the duration of
this contact for the printing of the largest sheet for which the machine is constructed.
The rest of the circumference is occupied by a sector of larger radius gearing with
another rack on the same side of the bed at a lower level. The result is that in this
part of the movement the cylinder travels more slowly. These arrangements allow
of reducing the size of the cylinder and facilitate the action of the stop finger. The
arrangement of the two racks and 2 centres is repeated at each side of the bed and on
each cylinder.
I will now describe the arrangements whereby each of the cylinders can be utilized
for printing 2 formes on the obverse and reverse sides of the sheet, the sheet being
cut in two after the printing. The bed has at each side 2 racks gearing with 2 sectors
on each cylinder but placed in order which is the reverse of the preceding arrange-
ment. The bed has a travel longer than the circumference of the cylinders and runs
more quickly than the cylinder turns in the part not allotted to printing, this
printing part 18 equal to nearly three-fourths the circumference of the cylinder and
corresponds to the total development of the 2 formes placed on the bed.
When the first cylinder has printed the sheet corresponding to the 2 formes st
comes to its stop on the line of the centres of the 2 cylinders. The second cylinder
takes this sheet and turns slowly until the sheet comes in contact with the bed
after which the cylinder turns at the same speed as the bed and prints in its turn
upon the 2 formes, the second forme coming upon the first that was previously
printed This sheet is afterwards delivered to the receiving board by the opening
of the grippers in front of the delivery roller. The sheet is afterwards cut in two.
This arrangement necessitates a given size of sheet and the 2 ends of the formes
should come at each end of the travel of the bed at an equal distance from the line
of the centres of the two cylinders The same machine can be employed for any
sizes of sheets smaller than the given size for which the machine is made by employing
in this case single sheets corresponding to one of the formes the reduction of the size
being made at the space between the two formes and the cylinders being provided
with blanket only in the part of their circumference corresponding with the forme
to be printed. When each of the cylinders prints on the 2 formes I place at each
end of the bed a small flat inking table receiving ink on the passage under the inking
rollers of the cylindrical inking arrangement and transferring it to 2 inking rollers
placed between the 2 cylinders and serving to ink the end of the two formes which in
turn are not entirely inked by the cylindrical inking arrangement.
I will next describe the arrangements whereby the set-off sheet is automatically
separated from the printed sheet and removed automatically. When a set-off sheet
1s necessary it is fed at the feed board and drawn forwards as described in the prior
Specification already referred to. The printed sheet and the set-off sheet arrive at
the same time at the exit roller At this moment the former is sucked from below by
a tube and the latter from above by another tube, these tubes being connected by an
air pump worked by the machine. This double suction separates the 2 sheets and the
set-off sheet is taken hold of by tapes which conduct it to a receiving device or
flyer while the printed sheet falls on the receiving board where it is arranged by
hand. The receiving device has only a short movement and brings the set-off sheet
to an inclined board of less length than the sheet which is thrown on to the board and
hangs over it.
In order to utilize the machine as a stop cylinder single printing machine it is
sufficient to disconnect the wheel which is fixed on the cylinder and gears with the
rack on the bed but leaving the wheel below the stop finger of the cylinder, than to
turn the cylinder so as to bring the grippers to the top of the cylinder at the time of
the stop instead of leaving them situated on the line of the centies of the 2 cylinders,
and to fix the wheel to the cylinder in this new position by means of bolts connecting

page_text: the wheel with the cylinder frame In order to insure perfect inking of all the
forme I arrange 2 inking rollers between the 2 impression cylinders; these 2 rollers
which run over the whole forme produce nniformity between the parts which are more
inked and those which are less so.
A point rod is added to the machine and this is put in action by a lever fixed on
the shaft which when the machine is used as a perfecting machine serves for raising
the lower part of the feed board so that the layer-on can adjust the sheet to the feed
stops. This very simple alteration allows of the machine being used either as a
perfecting machine with or without a set-off sheet or as double single cylinder
machine, or as a stop cylinder single machine, thus making it so to speak a universal
machine satisfying all the requirements of a printing office and rendering it par-
ticularly adapted for small establishments.
1000
J. C. MEWBURN,
169, Fleet Street, London,
Agent.

page_text: I, JULES DERRIEY of 1 Boulevard St. Denis, Paris, France, Mechanical 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
This invention has reference to a former invention described in Specification
No 9525 of 1887 and the present improvements relate :-
1st To arrangements whereby the speed of the machine can be increased.
2nd. To arrangements whereby the production of the machines can be increased by
utilizing each of the cylinders for printing two formes on the obverse and reverse
sides of the sheet, the sheet being cut in two after the printing.
3rd To arrangements whereby the set off sheet is automatically separated from the
printed sheet and removed mechanically
4th. To arrangements whereby the machines can be utilized as stop cylinder single
machines.
I will first explain the arrangements whereby the speed of machines of the
character of those described in Specification No. 9525 of 1887 can be increased.
These machines should in principle have the circumference of the cylinders equal to
the travel of the bed in one direction, and the larger the cylinder is the more is the
speed limited. The stopping of the cylinder becomes more difficult in proportion to
the increase of the diameter of the cylinder, while the bed being driven directly by a
crank movement can easily stand an increased speed. The large size of the cylinder
on the contrary causes a difficulty in the movement of the stop finger. In order to
overcome this difficulty I considerably reduce the diameter of the cylinder by means
of the following arrangements, (see Figures 1 and 2, sheet 1 of the annexed
drawings) :-
First 1 begin the printing a little below the line of the centres of the cylinders.
The cylinders being of large diameter it will be understood that their circumference
forms in a manner a straight line a little below and above the centre. I can therefore
cause the grippers to act a little below the centre with as much exactness as if they
acted at the centre itself Now a distance of 25 to 30 milhmetres gained under these
conditions shortens the travel about 10 centimetres, this difference of 25 millimetres
being calculated on the quarter of the circumference between the line of the
centres of the two cylinders and the point of contact of the cylinder with the
bed.
Secondly. The cylinder has really no need for a circumferential travel exactly
equal to the bed that carries the formes as in the part where the contact exists
between them for printing the sheet; I therefore place on the bed a rack A gearing
with a sector A' on the cylinder in the part corresponding to the quarter turn
necessary to bring the head of the sheet in contact with the bed and in the part
corresponding to the duration of this contact for the printing of the largest sheet for
which the machine is constructed. The rest of the circumference is occupied by a
sector B¹ of larger radius gearing with another rack B on the same side of the bed at

page_text: a lower level The result is that in this part of the movement the cylinder travels
more slowly These arrangements allow of reducing the size of the cylinder and
facilitate the action of the stop finger. The arrangement of the two racks and two
centies is repeated at each side of the bed and on each cylinder.
I will now describe the arrangements whereby each of the cylinders can be utilized
for printing two formes on the obverse and reverse sides of the sheet, the sheet being
cut in two after the printing. These arrangements are represented in Figures 1, 2
and 3, Sheet 2. The bed has at each side two racks A and B gearing with two
sectors A and B on each cylinder, but placed in the order which is the reverse of the
preceding arrangement The bed has a travel longer than the circuinference of the
cylinders and runs more quickly than the cylinder turns in the part of the cylinder
not allotted to printing; this printing part is equal to nearly three fourths the
circumference of the cylinder, and corresponds to the total development of the two
formes placed on the bed When the first cylinder has printed the sheet corresponding
to the two formes it comes to its stop on the line of the centres of the two cylinders
The second cylinder takes this sheet and turns slowly until the sheet comes in contact
with the bed after which the cylinder turns at the same speed as the bed and prints in
its turn upon the two formes, the second form coming upon the first that was previously
printed. This sheet is afterwards delivered to the receiving board by the opening of
the grippers in front of the delivery roller G. The sheet is afterwards cut in two
This arrangement necessitates a given size of sheet and the two ends of the formes
should come at each end of the travel of the bed at an equal distance from the line of
the centres of the two cylinders. The same machine can be employed for any sizes
of sheets smaller than the given size for which the machine is made by employing in
this case single sheets corresponding to one of the formes, the reduction of the size
being made at the space between the two formes and the cylinders being provided
with blanket only in the part of their circumference corresponding with the forme to
be printed. When each of the cylinders prints on the two formes I place at each
end of the bed a small flat inking table receiving ink on the passage under the inking
rollers of the cylindrical inking arrangement and transferring it to two inking rollers
placed between the two cylinders and serving to ink the end of the two formes which
are not entirely inked by the cylindrical inking arrangement
I will next describe the arrangements whereby the set off sheet is automatically
separated from the printed sheet and removed automatically. When a set off sheet is
necessary it is fed at the feed board F (Figure 1 Sheet 2) and drawn forwards as
described in the prior Specification already referred to The printed sheet and the
set off sheet arrive at the same time at the delivery roller G. At this moment the
former is sucked from below by a tube M and the latter from above by another
tube N, these tubes being connected to an air pump worked by the machine. This
double suction separates the two sheets and the set-off sheet is taken hold of by tapes
running over rollers m no which tapes conduct it to a receiving device or flyer while
the printed sheet falls on the receiving board where it is arranged by hand. The
receiving device has only a short movement and brings the set-off sheet to an inclined
board of less length than the sheet which is thrown on to the board and hangs
over it.
In order to utilize the machine as a stop cylinder single printing machine (see
Sheet 3) it is sufficient to disconnect the wheel which is fixed on the cylinder and
gears with the rack on the bed, but leaving the wheel below the stop finger of the
cylinder, then to turn the cylinder so as to bring the grippers to the top of the
cylinder at the time of the stop instead of leaving them situated on the line of the
centres of the two cylinders, and to fix the wheel to the cylinder in this new position
by means of bolts connecting the wheel with the cylinder frame. In order to ensure
perfect inking of all the forme I arrange two inking rollers between the two impression
cylinders; these two rollers which run over the whole forme produce uniformity
between the parts which are more inked and those which are less so.
The figure
hows a machine with flat inking but it is evident that cylindrical inking can equally
be adapted thereto,

page_text: A point rod A is added to the machine and this is put in action by a lever B fixed
on the shaft, which when the machine is used as a perfecting machine, serves for
raising the lower part of the feed board so that the layer-on can adjust the sheet to
the feed stops. This very simple alteration allows of the machine being used either
as a perfecting machine with or without a set-off sheet or as double single cylinder
machine, or as a stop cylinder single machine, thus making it so to speak a universal
machine, satisfying all the requirements of a printing office and rendering it particu-
larly adapted for small establishments.
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 in respect of printing machines is :-
1. The arrangement of two racks and two sectors on each side of the bed and on
each cylinder whereby the speed of the cylinder becomes slower after the printing of
a sheet, substantially as hereinbefore described.
2. The combination with racks and sectors arranged as and for the purpose referred
to in Claim 1 of grippers placed so as to seize the sheet a little below the line of the
centres of the cylinders, as and for the purpose described
3. The arrangement of a sector of larger diameter on each cylinder to reduce the
speed of the cylinder until it comes in useful contact with the bed, in combination
with an arrangement whereby at each cylinder the two formes on the bed are printed,
substantially as herein before described.
4. The combination with the arrangements referred to in Claim 3 of flat inking
tables and a cylindrical inking arrangement substantially as and for the purpose
herein before described.
5. The arrangement substantially as hereinbefore described whereby the printed
sheet and the set-off sheet are separated, the set-off sheet being conducted to a
receiving device or flyer while the printed sheet falls upon the receiving board.
6. The arrangement in a perfecting machine of a receiving device or flyer for the
set-off sheet in combination with an inclined board of less length than the sheet and
to which the sheet is delivered by the receiving device, the inclined board being so
placed relatively to the receiving device that the latter has only to make a short
movement to deliver the sheet thereto as set forth
7. The arrangement or means substantially as herein before described whereby a
machine can be converted from a perfecting machine into a stop cylinder single
machine and vice versa, the said ai rangement or means comprising a point rod as and
for the purpose set forth.
Dated thin 8th 1
.
1000