Improvements in Printing-machines.
Year: 1891

page_text: te of Application, 11th Mar., 1891-Accepted, 2nd May, 1891
COMPLETE SPECIFICATION.
Improvements in Printing-machines.
I, RICHARD OTTO KRÜGER, of 131, Alte Jacob-Strasse, Berlin, S. W., in the
German Empire, Manufacturer, 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 :-
My invention relates to a mechanism for leading off the printed sheet from the
printing-block directly after the printing and thus allowing in the same moment a
new sheet to be inserted without loss of time. It will be seen at first sight that a
great saving of time will be arrived at, as well as facilitating the manipulation
of the machine, wherefor a much greater number of sheets are printed in an hour
on machines, where my inventions are applied in comparison to those of the old
type.
In order to make my invention more clear, I refer to the accompanying drawing,
in which similar letters denote similar parts throughout the different views and in
which: :-
Fig. 1, Sheet 1. shows a printing-machine, whereby the first and third claim of
my invention are applied.
三
The printing-block B hinged on the pivots a³ receives the sheet to be printed,
while turned down to its lowest position, and prints the same in its highest position
while pressing against the types in the box E. Directly after a long lever h, having
on its utmost end a pair of tongs swivels down, allows the tongs to catch hold
of the printed sheet and leads it off by swinging upward again and lets it drop into
the cistern D. The details of these tongs are shown in Figs. 2, 3 & 4. Two
pipes and are bedded concentrically in the rear end of the lever h. To 12 is
fixed the jaw and to the pipe is fixed the jaw The outer tube having a slot
In further connection
'swivels
to allow for the oscillation of the jaw fixed to the inner one.
to these pipes are the double levers and 3 in such a manner that
combined with 21 and 62 63 swivels in combination with z.
The opening of the tongsis maintained by a click s¹ being part of a double
lever, also pinioned to the arm h, and which tends to push itself in between the
jaws and by the spiral-spring m, the said lever and tending to close
upon another by the spiral springs m'm'. The closing of the tongs is performed
by an adjustable screw t projecting on the main-frame of the machine in such a
position, that the free end of the lever s knocks against it, when makes its downward
motion, thereby releasing 4 out of and 6 and the tongs are closed by the elastic
force of m' m. The tongs thus having caught hold of the printed paper, the arm /
moves upward again and in its highest position the wedge sitting on the frame of
the machine forces its way between the levers 6 and 62, which, carrying on their rear
ends rollers p, to allow an easy entrance of the wedge, open wide. Thus the jaws z =¹
also open to allow the paper to drop into the box Ď and again the click s* is pulled
in between 6 and 63 by spiral m.
20
A modification of these tongs is shown in Figs. 5 and 6 on Sheet 2. Here is
only one double lever combined by the revolving tube to the jaw z¹, the jaw =
however having a small tail-piece which limits the opening of 2 by knocking
against a knob and on the other hand being held thereunto by the spiral-springf
The spiral tends to close the jaws. The opening is arrived at, by the rear end
of 6 carrying the roller p', which runs up a slope y', when finishes its upward
stroke. The small double levers having instead of a click, as before, a hook, which
catches hold of b¹ by force of the spiral m³, as soon as the roller runs up the said
slope and opens the tongs. By these means the tongs are held open, until the
lever h turns down again and the free end of a knocks against the adjustable screw

page_text: as before. In order to facilitate the grasp of the tong on the paper, the block B
is furnished on the top part thereof with a thin sheet of metal G, being cramped
unto the block B by the casting a and the set screw c, by which means the metal-
sheet may be lowered and raised. The lower edge of the same is turned up with
the exception of the middle part, where the tongs catch hold of the paper,
which being on its upper edge held off a little from the printing block by the said
turned up edge of the metal sheet, as will be readily understood from Figs. 5
and 9.
Figs. 7 and 8 show a mode for adjusting the length of circle the arm has to
describe, which is necessary, to allow for different sizes of sheets to be printed. I
arrive at this end by making the arm L, which gives the arm the requisite motion,
adjustable in length. The arm L ends in a ring e', which encircles the eccenter e.
This eccenter is bolted to the driving eccenter g' by bolts g, whose bolt-holes are
long slots and parallel to the centre-line of the arm L. The eccenter gl is keyed
on to the shaft wc, receiving therefrom the driving motion. In adjusting the length
of L by bolts g the oscillation of may be altered ad libitum.
Now the adjusting of these eccenters may be dispensed with, when making use of
the following modification, applied to a mechanism for lifting the sheet of paper up
a little from the block after being printed.
This arrangement is shown on Sheet 3, Fig. 10 is a side-view of the block B,
having thereunto the complete mechanism for starting the lifting off from the block.
Figs. 11, 12 and 13 show the details thereof. The frame has its bearing in the
axis a on the block and carries on top two angles w², which are adjustable by the
slots and wing-nuts t', thereby allowing also very narrow slips of paper to be printed.
To allow for adjusting in the other direction the vertical parts of the angles t
are also made adjustable in a similar manner. Underneath the block are the
hinges of two arms 6 which press the sheet d to the tongs w' and therefor also to
the block. In combination with this, is the pillar y having on its upper part a small
lever ', which knocks against a stud a fixed to the frame, while the block is
making its backward motion after printing, thus releasing the sheet from the block
at the moment the tongs catch it up. After this is done, the lever ' is released by
the pin and drawn into its former position by the spiral f2, the frame at the same
time is retracted unto the block by the spiral. On top of the frame there is a
guide-piece in the shape of an angle, allowing the guiding-bolt t² to protrude
through the vertical part of the same. The spiral spring, which by its clastic
force holds the frame to the block, surrounds the bolt and rests with one end
against the block and with the other against the vertical part of c.
C
The manipulation of this mechanism is performed in this way: The arms are
opened down to allow the sheet d to be inserted, so as to be firmly held between the
arms and the vertical parts w¹ of the angles w close to the block B. Then the
block B is made to move against the types at E, where the sheet d is printed. And
when the block hereafter moves back, the stud n of the frame knocks against the
above mentioned lever ', and keeps the frame raised so long from the block until
the tongs, have carried off.the sheet. Then the movement has advanced so far
as to allow the pins to release the lever h¹.
Another modification to the same end as the last is represented on Sheet IV..
In Fig. 17 the frame is pivoted on the axis a and held elastically to the block
by the spiral f
ין
Sitting on the main-frame there is an army', which oscillates in one direction
only, being prevented to turn down to the other side by the toe-piece and is held
in its vertical position by the spiral. This arm y¹ carries a circular knob n², and
a similar circular knob n' is attached to the frame r. These two knobs, laying in
one vertical plain, are in such a position, that, when the block moves forward, they
catch each other and the arm y! is caught hold of, until it takes the middle position
shown on the drawing, by dotted lines.
The knob n' slips underneath n' and the arm y' is pulled back and upright by the
spring. Now the printing being accomplished, the block returns, and again the

page_text: two knobs collide, retarding the frame r in the course of the block, as y' is prevented
to turn down in this direction by the toe-piece. After the block having moved
on a bit and having allowed the paper to be carried off, as before, the motion of the
frame is such, that the knob n' may slip over n² and the frame may be drawn to the
block again. Thus the operation may be repeated.
A very fine and simple modification for raising the paper from the block is
represented on Sheet V, Fig. 19.
As before the frame is hinged on the pivots a and held close to the block by
the spiral-spring f the paper-holder & may be hinged at a¹. Near to the axis of a³
whereon the block B is hinged, there is a pillar 2. Thereunto is pivoted a latch k
held down by the spiral. The front-piece k' of this latch & is in such a position,
that the top of the frame would collide therewith in its course, so that the block
making its forward motion, the top of the frame would knock against k' and meeting
here the beveled point thereof, pushes it upward, while overcoming the elastic force
in the spring. As soon as the frame has passed ', the latch will snap down
again, and, when the block turns back after the paper being printed, the top edge
of the frame will be caught by the inner side of and held back, while the block
itself moves on. The frame as well as the printed sheet of paper will thus be lifted
off from the block, and the tongs be allowed to catch up the paper. While this is
done, the pivot a has made along with the block B a somewhat downward motion,
as the block swivels round a³. The top edge of the frame therefore also moves
downward and when the paper has been led off by the tongs, it will arrive at the
lowest point of ' and therefore slip off from it and be pulled to the block again by
the spiral. The dotted middle position in the drawing shows the frame in the
moment before slipping off. The other dotted figure shows the position of the block
while printing.
?'
Finally a very important modification is shown on Sheet IV, by Figs. 14, 15
and 16. The tongs are here called 23, and are adjustable by the slots 12
and 13 and the screws tt, so as to allow for different sizes of paper. One of these
tongs is screwed unto tube r', which is this case fixed to the arm, while the other
tube carrying the other jaw is in combination with the closing and releasing
lever. The operating is the same as before. Sheet VI, Figs. 20 and 21 show
printing press whereby the arrangements of Claims 2, 3, 5 and 8 minutely described
above are made use of.
AL
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :--
In a printing-press:
1. The arrangement of an oscillating lever carrying on its rear end a small
double lever (s) with a clink (s) and a spiral-spring (m), two double-levers (bb)
and (3), having rollers (pp) and spiral-springs (m' m¹) of which levers the
one, (), is connected to the jaw (1) and the other, (3) to the jaw (), which
forms with the first names () a pair of tongs, in combination with the wedge (4)
and adjustable screw (t), substantially as described.
2. The arrangement of an oscillating lever (4) carrying on its rear end a small
double lever (s) with a hook on one side and a spiral (m³) and another double
lever (1) being on its lower end of (') suitably formed so as to be caught by the
said hook of (s), carrying on its upper end of (b) a roller (p') and being provided
by a spiral spring (r) and connected to the jaw (1) another jaw (=) forming with ()
a pair of tongs, is connected with a small tail-piece (4) and a spiral-spring (f), in
combination with a slope (¹), an adjustable screw (t) and a metal-sheet (G) with
tilted-up edges (3) and fastened to the block (B) by the adjustable casting (u) and
set-screw (v), substantially as described.
3. The combination of two concentric tubes (22 r¹) the double levers (6 6¹)
and (263) and the tongs (¹), substantially as described.

page_text: 4. The combination of the eccenter (g) and the adjustable eccenter (e e¹) provided
with slots and screws, substantially as described...
5. The arrangement of the frame () provided with a knob (n), a spiral (f) and
tongs (w) adjustable by the slots (1) and wing nuts (t¹), in combination with an
arm (y) carrying an oscillating lever (¹) and spiral (2) and a pin (²), for the
purpose set forth and as described.
6. The arrangement of the frame (r) provided with a spiral (ƒ), a circular
knob (n) and adjustable tongs (¹) in combination with an oscillating arm (y)
carrying a circular bob (2) and being provided with a toe-piece (3), and a spiral
spring (ƒ), for the purpose set forth and substantially as described.
7. The arrangement of the frame (r), provided with a spiral (1) and adjustable
tongs (w), in combination with a pillar (y) fixed to the frame and having on top
an oscillating clink (k) and a spiral (1), substantially as described.
8. The combination of two concentrical tubes (²), one of which is in firm
connection with the lever (4), the other able to revolve and connected to the double
lever (66), both tubes carrying each one of the tongs (3), which for reason of
adjusting the same are provided with slots and set screws, substantially and for the
purpose set forth.
Dated this 10th day of March 1891
RICHARD OTTO KRÜGER.
By Robert Deissler,
Agent for the Applicant.