Improvements in Platen Printing Presses.
Year: 1889

page_text: Date of Application, 4th Sept., 1889
Complete Specification Left, 12th May, 1890-Accepted, 14th June, 1890
PROVISIONAL
SPECIFICATION.
Improvements in Platen Printing Presses.
We FRANCIS XAVER HÖBZLE and CARL SPRANGER, Machinery Makers of Munich
in the Empire of Germany do hereby declare the nature of this invention to be as
follows:-
-
This invention relates to platen printing presses in which a stationary vertical bed
is employed.
In the improved press, the bed is supported loosely on a horizontal shaft journalled
in side frames, the inking rollers are caused to move over the bed and are supported
upon arms fixed to said shaft.
These arms revolve in the spaces between the side frames and the bed on each
side of the latter. To allow of the passage of the said arms and yet to hold the
bed firmly during printing, the latter is provided with sliding bolts adapted to be
moved alternately back and forth against suitable projections on the side frames so
that at least one bolt is always in contact with the side frame. Grooved cam wheels
on the shaft may be used for operating these bolts. On withdrawing the bolts by
hand the bed may be turned about the shaft into say, a horizontal position to
facilitate the placing of the former.
The inking trough feeds a stationary roller having a ratchet wheel and pawl
device adapted to be struck by gear on the travelling rollers and thus rotated
intermittently for supplying the latter.
Around the back of the bed is a cylindrica! hood made to fold down and con-
centric with the shaft supporting the bed and serving as an ink mixing table on
which the travelling rollers run. This hood is oscillated longitudinally during the
movement of the machine. On each side of the bed are sliding rails adapted to
be moved by a hand lever so that when desired the inking rollers may run upon
these rails clear of the type.
The platen moves back and forth onto the bed, turning down when in its rearward
position by the engagement of a segment on a fixed rack. The cross shaft carrying
the platen carries eccentrics, the straps of which are connected by rods to be moved
back and forth by the main shaft. A hand lever on the platen shaft with gear for
fixing it in position serves for the adjustment of the pressure of the platen by
revolving the shaft and so altering the position of the eccentrics.
The position marks or stops on the platen are held between two rails fixed by
a lateral arm and screw so that they may be easily set in a desired position.
Dated this 4th day of September 1889.
HERBERT & Co.,
Agents to Applicants.
COMPLETE SPECIFICATION.
Improvements in Platen Printing Presses.
We FRANCIS XAVER HÖBZLE and CARL SPRANGER both of Munich in the Empire
of Germany, Machinery Makers 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 relates to platen printing presses with a vertical stationary bed and
the object of the invention is to improve the construction thereof as hereinafter
described.
יז

page_text: section through the press. Fig. 2 an end elevation with the cylinder hereinafter
referred to removed. Fig. 3 a detail view. Figs. 4, 5 and 6 are views of the
platen.
With the platen printing presses with vertical stationary bed either securely
connected with the frame or with the shaft various difficulties and inconveniences are
encountered in arranging the composition and the like. Also the inking apparatus
do not always act uniformly.
In order to avoid these faults we use a bed which is arranged loose upon the shaft
and an inking apparatus consisting of inking rollers which rotate around this cylinder
shaped bed.
The inking rollers ƒ rotate around the bed cylinder a being slung on draw bars n
which are securely connected with the main shaft w.
In order to ensure free movement of the bars it is necessary that a completely
empty space be left hetween the side walls of the framework and the bed but as on
the other hand the bed cylinder arranged loosely on the main shaft w requires to be
securely fastened in the position necessary for the purpose of making a proper
impression, the following arrangement has been devised.
3
As stated above, the ink rollers frotate by means of the bars n which are securely
connected with the main shaft w continually around the bed cylinder a which encireles
the vertically situated bed which receives the form at b. As illustrated by Fig. 2 a
space remains between the cylinder and frame S for the free motion of the arms n.
The cylinder embraces loosely the shaft w by the bosses of its side plates a¹. Between
these side plates are the two symmetrically arranged drums y and keyed to said
shaft so that they follow the movement of the latter. The drums y and z as shown in
the drawing are provided with slots y . In the interior of the cylinder are, as niay
be seen by Figs. 1 and 2 the guide rods c² ² secured to the side plates a¹ and upon
these the bolts e de can be moved to and fro by means of their levers c¹ d' e¹ having
rollers at their ends and engaging in the slots aforesaid. The slots are so contrived
that the bolts in their outward position engage with the bolts S¹ of the frame S Fig. 2
the set of bolts S₁ being removable.
Supposing the inking apparatus to rotate in the direction of the arrow, the lower
bolt e Fig. I has just been withdrawn from the frame being shifted inwards Fig. 2
through its lever c' operated by the hand in the slot During this interval
however, the two other bolts c and d were shifted outwards by the slots y¹ z¹ and
their levers c¹ and have engaged with the bolts S' on the frame S.
By this means on the one hand, the passage is free at for the inking roller
carriers and on the other hand the bed is securely connected with the frame by the
bolts c and d so that the impression can be taken. As the inking apparatus continues
to rotate, the bolt e advances in the first instance as the two other bolts c d are
withdrawn, so that now at this point the inking roller carriers can travel through
without obstruction. Thus the securing of the bed with the frame takes place
alternately by the bolts c d e in the requisite manner for the rotation of the inking
apparatus and for the printing.
In order to place the bed horizontally for the adjustment of the form one need
only withdraw the upper bolts S' and the vertically situated bed can then be moved
round by one manipulation and can be placed into a horizontal position in order to
lock up to correct and to register easily as with cylinder presses.
To provide for the oiling and cleaning of the bolts slots etc. for easy working the
cylinder enclosing circularly the bed is pivoted on hinge joints on the pintle g fixed
to the side pieces a¹ and is fastened with its hook a² to the cross bar g¹.
One of the main points with printing presses of all constructions is the complete
inking of the printing type. With the platen printing press, this is done in the
following manner.
At F is arranged the inking box with the roller F'. The latter carries outside the
frame the hand wheel F2 with the ratchet wheel F³ (see Fig. 1 in dotted lines Fig. 2
front elevation). In the groove F4 of the latter gears the ratchet bolt of the
lever loose on the trunnion of the roller F. Said lever h¹ is provided with a

page_text: projection the position of which and therefore that of the lever and of the ratenet
bolt h is regulated by the set screw ³ of the frame S.
The lever is connected by means of rod with the lever h³ revolvable at S' on
frame S. The lever that is to say its curved extension is always held in the
position of Fig. 1 by the spring h. During working of the machine, this latter lever
and thereby the whole lever apparatus h h h¹ is raised by the nose w' on the main
shaft w and the ratchet bolt h the ratchet wheel F3 and the roller F' move at the same
time during the interval of this stroke in the direction of the arrow when after
the end of the stroke when the spring begins to act, said ratchet bolt h slides
downwards in the groove F in order to cause at the next stroke further rotation
of the roller F¹. As may be easily perceived the angular distance of the revolution
can be made smaller or larger by the adjustment of the screw h³. The regulating
may be performed during the motion of the machine. The ink rollers fas already
stated rotate around the cylinder a.
The last one of said rollers f' is provided on each side with an annular projection f
by means of which during the rotation it is somewhat raised by the projections S³ of
the frame so that it takes ink off the roller F¹ this therefore servers as a licking roller.
By said annular projections it is also kept off on the rails i from the types and there-
fore does not lay on ink. After passing off the rails i it puts the ink taken off the
roller upon the bed cylinder said ink being spread over by the remaining inking
rollers.
In order that this inking distribution may be as uniform as possible the bed cylinder
is arranged so that it moves to and fro during the motion of the machine. For this
purpose the cylinder a is provided in its interior with a bolt as preferably with a roller
which gears into a cam slot a in a drum on a shaft a journalled in the side frames a¹
of the bed cylinder. Said shaft a is in connection with the main shaft w by means
of toothed wheels so that during the working of the machine the cylinder is moved
to and fro by means of the bolt a³ in slot a. By this extended cylinder shaped
surface for spreading the ink upon and by the large laying-on-rollers an extraordinary
spreading and distribution of ink is produced which makes it possible to spread the
coarsest ink and to put cheap ink into such condition that a good and clean print is
obtained from it. For the purpose of removing the inking rollers from the type
during printing the rails i are made adjustable. These rails being arranged with both
sides within the frame S are provided with oblique slots by which they move on
bolts of the frame and thus can be adjusted in an optional manner.
In the drawing
is arranged a hand lever revolvable on which gears by means of its fork k³ into
the bolts a the rails. This hand lever carries the pawl I revolvable on A³ which by
means of spring gears into a corresponding groove of the segment 12 secured to the
frame. After releasing the pawl the band lever can be easily slightly raised whereby
the rails slide away from the forin surface so far that the roliers cannot touch the type
and serve now only for spreading the ink.
In using higher or lower types as well as with the shrinking or swelling of the
supply rollers both rails may be moved forward or backward. By means of the
simple thumb screw of the frame which being arranged underneath the hand
lever k can be raised or lowered, the stroke of the hand lever can be increased or
diminished. By this easy displacement of the roller rails, an immediate throwing
out of gear of the supply rollers may be effected during the process of printing.
With the present machine the platen with the platen back is conducted during the
fall of the platen by the toothed bars A and toothed segment B arranged on the frame
and platen back and brought from the horizontal into the vertical position by the
drawing rods operated by the eccentric of the main shaft w it slides then for a
moment on a horizontal surface and is pressed exactly parallel onto the form.
I
In order to enable one to adjust the pressure of the platen on the type the following
device is arranged referring to Fig. 3. Across the platen back runs a shaft the
toothed wheels of which arranged on both sides gear into the wheels of the
rotary eccentrics m¹ which are journalled in the rods c and the shaft m secured in
the platen back. By suitable revolution and adjustment of the shaft r the platen may

page_text: be brought nearer or removed from the type. For this serves the pressure lever o
with vibrating button and hook of which lever rests by means of said hook upon an
interchangeable pin which is inserted into one of the numbered holes of the row p
of the platen back. According to whether the pressure of the platen upon the type
is to be stronger or weaker the pin p is inserted into a lower or higher hole and the
lever o adjusted thus, that its hook of rests upon said pin whereby the platen is adjusted
nearer to or further froin the type by means of the eccentric m
If the roller rails are displaced at the same time the machine can work without
inking and without printing whilst the ink spreading continues.
A further improvement lies in the sheet adjusting apparatas on the platen. The
same is represented in plan in Fig. 4, Fig. 5 being a longitudinal elevation, Fig. 6
being a cross section. On the platen is arranged a V shaped rod and on the arms
of which slide the sockets 2 which connect a steel band running across the platen
having an angle 8 movable thereon. On this steel band and angle are metal pieces 4
set on by dovetail shaped grooves and on the surface of said pieces is let in likewise
prismatically a metal tongue 5 in order to obtain an easy adjustment of the sheet.
The same may be advanced or receded according to the size of type. The two
adjustable sockets 2 serve for shifting forward or backward the steel band according
to the size of the paper to be printed. The V shaped rod carries on its cross running
part a nose 6 upon which presses a spring 7 which thus presses the steel band
continually upon the platen.
The position of the adjusting marks does not alter during the printing also the
perforating of the layer on is prevented. If the same is to be changed or partly
altered the whole mechanism is turned up and after the respective manipulations are
done is again placed in the correct position.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what
we claim is
In a platen printing press with vertical bed in which, in order to be able to
place the bed horizontal and to use an inking apparatus rotating around the same
the method of arranging the bed loosely upon the main shaft w and securing the
same in position necessary for the printing by a periodical locking of the bed or its
drum with the frame.
2. For the purpose of thorough ink spreading the folding drum around which
and on which the inking rollers rotate said drum being moved to and fro so that
an even ink distribution and spreading takes place at all places of the inking
rollers.
3. The nose won the main shaft w which raises a lever arrangement influenced by
a spring the catch h of which arrangement turns the ratchet wheel F3 of the roller F
correspondingly the stroke being regulated by the screw h³ of the frame.
4. For the immediate throwing out of gear the supply rollers during the printing
the two roller rails connected together and arranged adjustable upon the frame with
a hand lever for operating them substantially as set forth.
5. The shaft running across the platen back said shaft having toothed pinions
gearing into the toothed wheels in connection with eccentrics arranged to rotate
which are journalled in the drawing rods and on the shaft secured in the platen
back.
6. A paper adjusting apparatus consisting of a steel band with socket adjustable on
the shaped rod upon which band are sliding pieces carrying in dovetailed shaped
grooves movable tongues the whole being pressed against the platen by spring 7 which
acts upon the nose 6 of the rod l.
HERBERT & Co.,
18, Buckingham Street, Strand, London, W.C., Agents to Applicants.