Improvements in Platen Printing Machines
Year: 1899

page_text: Improvements in Platen Printing Machines,
We, FRED WAITE, of The Lindens, Burras Lane, Otley, in the County of
York, Printer's Engineer, and WAITE & SAVILLE, LIMITED, of Falcon Works,
Otley, aforesaid, Printer's Engineers, do hereby declare the nature of this inven-
tion to be as follows: -
•
This invention more particularly relates to that type of platen printing presses
provided with a rising and falling feed table and in which the platen swings from
beneath such table to a position to receive the impression from an approximately
vertical type bed.
Instead of moving the platen in this way we may use a fixed platen and employ
suitable grippers or their equivalent. mounted preferably upon arms pivoted
sufficiently above the centre of and to the rear of the platen to enable them when
vibrated to carry the paper from the feed table down over the face of the platen
and hold it in position whilst the impression is made. In this arrangement, the
feed table may either rise or fall to move the paper clear of the feed guage. to
enable the grippers to lay hold of the paper. Or the table may be stationary and
the feed gauge moved to leave the grippers free to withdraw the sheet.
The chase or form holder is fitted between vertical guides and it is supported
below by an adjustable claw or support regulated by a screw. An upper claw or
pressing piece is brought over to engage the top of the chase and the pressure of
this latter claw is determined by a spring thus by adjusting the screw the chase
may be vertically adjusted.
To check the impression we employ an eccentric supporting shaft for..the type
An anti-friction
bed and a curved incline is fixed upon one end of this shaft.
roller mounted upon a vibrating arm or lever actuated in one direction by spring
pressure is located adjacent to said incline but is normally vibrated sufficiently
to prevent the incline engaging the roller. To check the impression this
vibrating arm is supported with its anti-friction roller in the path of the incline
and the latter is thereby turned so as to move the eccentric shaft sufficiently to
prevent the type reaching the platen. The vibrating arm may be stopped by a
rod pivoted to it and the other end sliding in a guide beneath a weighted detent.
This weighted detent is brought into position to engage a projection on the rod
by means of a pivoted weight which is turned over so as to bear on one end
of the detent to depress it when it is required to engage said projection and
said weight is raised to allow said detent to become disengaged from the rod.
For the purpose of double inking this checking device is worked automatically
every alternate stroke. For this purpose an arm is pivoted upon a stud close to
said detent and has a cross piece projecting over its depressable end and also over
a star or notched wheel which is moved over one division at every to and fro
movement of the platen. This star or notched wheel allows said arm to drop
sufficiently every alternate movement to depress the said detent and check the

page_text: impression. The star wheel may be driven by a ratchet wheel on its shaft engaged
by a pawl upon the platen and this pawl can be thrown out of operation when
required.
A star or notched wheel on the same shaft may be provided to hold the feed
table up by engaging a projection thereon every alternate stroke when double
inking.
Dated this ofth l
1000
Improvements in Platen Printing Machines.
I, FRED WAITE, of The Lindens, Burras Lane, Otley, in the County of
York, Printer's Engineer, and WAITE & SAVILLE, LIMITED, of Falcon Works,
Otley, aforesaid, Printer's Engineers, do hereby declare the nature of this inven-
tion and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement:-
This invention more particularly relates to improvements in the platen printing
press for which Letters Patent No. 12,878 were granted to the present applicants
on the 9th June 1898.
To fully describe our invention reference is made to the accompanying sheet
of drawings, forming a part of this specification, in which similar letters and
figures of reference indicate corresponding parts in each of the views.
Figure 1, is a side elevation of such parts of the machine as are necessary
to illustrate the application of the mechanism for stopping the impression and
for double inking.
Figure 2, is a plan view of certain of the parts shown in Figure 1.
Figure 3, is an elevation of certain of such parts shown in a different relative
position to that shown in Figure 1.
Figure 4, represents a view of certain of the parts shown in Figure 2 looking
towards the opposite side to that represented in Figure 1.
Figure 5, is a sectional view showing the stationary platen and gripper carrier
and such other parts as are desirable to explain their operation.
Figure 6, is a similar view showing the grippers brought down over the platen.
Figure 7, is a plan view of the gripper carriage and gripper.
Instead of moving the platen a stationary platen C may be employed and
normally remain in the position shown. In this case a gripper E arranged and
operating as described in the Specification of the above cited Letters Patent is
used mounted upon the swing arms or carriage 50 having a bar 51 along the front
adapted to hold the paper in conjunction with the gripper E when the latter is
brought down upon it. The arms 50 are secured to the rocking shaft C2 actuated
in the manner described in the specification referred to above so as to carry the
paper from the feed table A and draw it over the face of the platen into position
to be printed upon.
The type bed D is of ordinary design and is carried by arms 2 on each side
swinging upon the rocking shaft 3. The arms 2 are oscillated by rods 12 on each
side connected to the cranks or eccentric studs D³ in the wheels D fixed on each
end of the shaft B³. The ends 4 of the rods 13 are coupled to eccentric pro-
jections 5 on the shaft 6 mounted in the bearings 7 in the arms 2. An inclined
tappet arm 10 is fixed on the shaft 6 and when this arm engages the anti-friction

page_text: roller 12 the shaft 6 is rotated in its bearings to bring the eccentric ends 5
sufficiently round towards the platen to prevent the impression being made.
Springs are arranged in any convenient way to return the eccentric shaft to its
normal position.
:.
In order that this may take place when it is desired to stop the impression
either momentarily or automatically at every other stroke when double rolling
is required the anti-friction roller 12 is mounted on the arm 13 of the bell crank
lever 14. This lever is normally vibrated with the arms 2 so as to prevent the
tappet arm 10 engaging the roller 12 by means of its arm 15 coupled to the arm 16
on the shaft 3 by the compressable spring coupling 17. A rod 19 connected to
the top of the arm 13 slides to and fro through the guide stud 20 in the side
frame B and when it is desired to stop the impression the end 21 of the weighted
lever 22 pivoted on the stud 23 is brought down so as to engage the shoulder 24
in the rod 19 thereby holding the lever 14 stationary in order that its roller 12
can be engaged by the tappet arm 10.
To depress the end 21 of the lever 22 automatically I pivot the bell crank
shaped arm or lever 8 on its stud 23 one arm 25 of which carries an anti-friction
roller 26 bearing against the star wheel 27 having depressions 28 in its periphery.
The other arm 29 of the lever 8 has a weighted arm 30 pivoted to it and the boss 31
of this lever projects across the lever 22. The star wheel is intermittently
operated so that at every alternate movement of the type bed one of the depres-
sions 28 is presented to the anti-friction roller 26 and this permits the lever 8
to fall down and depress the lever 22. The star wheel is fixed on the shaft 33
actuated by the ratchet wheel 32 on its other end operated by the pawl 34 carried
by the lever 35 lifted by the rod 36 connected to the arm 50 or other moving
part. The projection 37 (Fig. 2) on the lever 35 engages a stop piece 38 on the
frame B and prevents the lever falling too far.
To stop the impression other than for double rolling the arm 30 is turned
over to the position shown by the broken line in Figure 3 so that it rests upon
and depresses the lever 22. The spring 62 is employed to draw the tappet 10
back against the stop 63 when it is disengaged by roller 12.
The feed table A is carried on the arms A projecting from the rocking shaft A
and a rising and falling movement, is imparted to it. To stop the movement at
every alternate stroke during double rolling the star wheel 39 is provided on the
shaft 33 and a stud 40 is provided on the arm A next to it and at every alternate
stroke one of the projections 9 on the star wheel engages the stud 40 and keeps
the table from falling. When double rolling is not required the pawl 34 is
disengaged from the ratchet wheel.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what
we claim is: :―
1. The combination with the shaft 6 having eccentric ends 5, of the inclined
tappet 10 on the shaft, the lever 14 vibrated by a spring connection, and means
for checking said lever, all arranged and operating substantially as herein shown
and described.
2. The combination with the rod 19, of the weighted lever 22, the lever 8 and
the intermittently operated star wheel 27, all arranged and operating sub-
stantially as herein shown and described.
3. The combination with the lever 22 of the weighted arm 30 mounted on the
lever 8, all arranged and operating substantially as herein shown and described.
4. The combination with the rising and falling feed table, of the projection 40
and the intermittently operated star wheel 39, substantially as herein shown and
described and for the purpose specified.
5. The combination with a stationary platen, of a gripper or grippers and
gripper carriers adapted to carry the sheet from the feed table to the platen,

page_text: said gripper or grippers being of such a form that when open they permit the
sheet to be drawn away at the lower edge of the platen, substantially as herein
shown and described.
Dated this 25th day of October 1899
DRACUP & NOWELL,
Patent Agents, Bradford.