Improved Paper-cutting Machine.
Year: 1899

page_text: Date of Application, 8th Nov., 1899-Accepted, 1st Sept.,
1900
Improved Paper-cutting Machine.
We, RUDOLF KARL FоMM, Merchant, HANS FOμM, Engineer, GEORG FOмM,
Engineer, all of the Firm of August Fomm, of the Machine Works, Leipzig-
Reudnitz, in the Empire of Germany, 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 for an improved paper-cutting machine relates to machines of the
guillotine type in which a clamping and cutting action is produced by means
of an oscillating lever, and has for its object to increase the effective capacity
of the machine and consists in arranging the oscillating lever, the means for
connecting the lever with the cutter, and the clamping arrangement so that the
several parts which work together balance one another, whereby the motion of
the machine is nude easy and free from vibration, and a greater number of
revolutions rendered possible.
The arrangement made for this purpose will be clearly seen by means of the
following description and the accompanying drawing, in which,
Fig. 1 is a front view of the machine.
Fig. 2 is a side view of the same.
Figs. 3 and 4 show the internal arrangement of a friction disc, in and out of
engagement.
Fig. 5 is a section along the line N-N in Fig. 3.
Fig. 6 is a sectional plan of the friction disc and a view of the friction ring.
Fig. 7 is an external view of the friction disc.
The oscillating lever à furnished with a crank pin
"
the crank wheel a, has two arms, and is pivoted at i.
"slots and actuated by
The arm of the lever opposite to the cutter arm is connected by rods with
the cutter beam b, and through the friction disc lever m, friction coupling gr,
oscillating shaft k, and connecting rods with the clamping beam d.
The friction disc
is keved thereto.
is loosely mounted on the shaft k, whilst the friction ring r
The friction ring is pressed against the rim of the disc by means of an adjust-
able tightening lever o, and accordingly as the pressure of the pressing beam is
greater or less, the adjusting screw of the tightening lever o is more or less
tightened, (see Figs. 3 to 7).
The ring and the disc g, after being adjusted in accordance with the requisite
pressure of the clamping beam, are permanently coupled, but in such a manner
that, in case of there being any resistance, they can slide one over the other.
With the assistance of the two-arm lever hit is possible to balance the weight
of the outter-beam 6 bearing on the short arm of such lever, and to balance the
weight of the clamping beam d by the long oscillating lever arm, so that the
machine, in other words, the several parts of the same, are equilibriated as far
as possible in the most varied positions.
The action of the machine is as follows:-
If the lever his moved by the crank-pin disc a from the position shown in

page_text: Fig. 1 into the position indicated by dotted lines the friction disc lever m as
well as the rods and the cutter and clamping beams connected therewith,
are actuated, the clamping beam, however, which is in advance of the cutler-beam,
remaining stationary as soon as it comes on to the paper that is to be cut, the
contact surfaces of the friction disc sliding one over the other whilst the cutter-
beam owing to its being firmly connected with the lover h is compelled to follow
the same into the lowest position.
During the cutting operation, that is to say, as soon as the clamping beam
comes on to the pile of paper and is prevented by the paper from moving further,
the disc g sliding on the ring r the friction between the two surfaces is adjusted
to maintain an adequate pressure of the beam against the pile of paper.
Upon the lever moving in the opposite direction, the clamping beam d will
move in advance of the culter until it reaches the highest position, determined
for it by suitable guides, whereupon, the dise y must slide back again on the
ring, until the cutter beam bis in its highest position, that is above the pressing-
beam d.
Instead of the friction coupling shown in the drawing, any other adjustable
friction coupling, which will serve the same purpose may be employed, the inven-
tion consisting simply in the two-arm lever h in the combination with the means
for actuating the clamping beam.
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:-
A paper-cutting machine, with cutter and clamping beam action produced by
au oscillating lover, the distinguishing feature of which is that. in order to
ensure uniform and smooth running of the machine, and to allow of the machine
being driven more rapidly, the oscillating lever his formed with two-arms, with
the shorter arm of which, the cutter beam is connected and co-opernies, by
means of rods, the clamping beam d on the other hand being connected and
co-operating with a friction coupling gr, the clamping of the pile of paper being
regulated by an adjusting lever o on the friction coupling gr.
Dated this 8th day of November 1899
WHEATLEY & MACKENZIE,
40, Chancery Lane, London, W.C., Agents.