Improvements in Machines for Cutting out Oval and other Sheets of Cardboard, Paper, and the like.
Year: 1888

page_text: Date of Application, 22nd Oct., 1888
Complete Specification Left, 20th July, 1889-Accepted, 21st Sept., 1889
PROVISIONAL SPECIFICATION.
Improvements in Machines for Cutting out Oval and other Sheets of
Cardboard, Paper, and the like.
I, HERMANN WELCKER of 35 Linkstr., Berlin, W. in the Empire of Germany,
Engineer, do hereby declare the nature of this invention to be as follows:-
In the manufacture of various articles, for example boxes, cases, labels for bottles,
playing-cards, and the like, it is necessary to cut out cardboard or paper sheets in
such a manner that the outer circumference of the same forms an oval or a circle.
Heretofore use has been made for this purpose of knives or cutters bent to the form
to be given to the cardboard or paper. Such knives or cutters, owing to the difficulty
experienced in their manufacture, are very dear, and as a special knife must be used
for each form, the expense for these knives or cutters forms a considerable factor.
Now, I have devised an improved machine in which, after loosening a few screws
the parts can be so adjusted for cutting out elliptical or circular sheets of any size.
This machine comprises a spindle having at one of its extremities a plate by which
a pile of the cardboard, paper, or the like to be cut is pressed against a bottom plate.
The said spindle is actuated by means of a hand-wheel or the like, the nave of which
forms a nut which is held upon the frame of the machine so that it cannot be displaced
.endwise. Upon the spindle is slid a sleeve or hollow spindle having a longitudinal
groove with which engages the key or feather of one of a pair of bevel-wheels which
is supported so that it is prevented from moving endwise. By the turning of a crank
the aforesaid sleeve or hollow spindle is operated through the medium of the above
mentioned bevel wheels.
In the head of the said sleeve or hollow spindle is arranged a fork, at one end of which
is fixed the knife or cutter. Upon the other end of the fork is slid a block carrying a
As the said head
stud or pin which engages with an elliptical groove in a curve-disc.
is compelled by a key placed in a groove of the same to participate in the rotation of
the sleeve or hollow spindle, the fork will also be carried away. The above mentioned
stud or pin, as the curve-disc is prevented by its arms from turning, will now move
the fork to and fro in the said head. The knife or cutter will therefore also describe
an ellipse or an equidistant of the same, according as the distance of the knife or
cutter from the centre of the spindle is equal to the semi-major axis of the ellipse or
longer than this. The proportion between the semi-major and semi-minor axis is
optional; in case the two axes are as 1:1 a circle is produced.
In order that the knife or cutter shall be able to descend in accordance with the
number of sheets cut through the aforesaid sleeve or hollow spindle, knife head and
curve-disc are arranged to be moved up and down. With an annular groove in the
sleeve or hollow spindle engages the claw provided on a hand-lever which, being
acted upon by a spring, will press the sleeve or hollow spindle downwards. If for
the purpose of inserting a fresh pile of cardboard, paper or the like the knife or
cutter shall be raised, the handle of the said hand lever is pressed downwards and a
pawl is caused to engage with the teeth of a ratchet wheel upon the shaft of the
band-lever. The latter will then maintain the sleeve or hollow spindle and knife head
in their highest position until the pawl is, disengaged after the fresh pile has been
clamped.
The above-mentioned head is kept by a nut upon the sleeve or hollow spindle, and
the curve-disc is placed between the said head and the collar on the lower side of the
aforesaid annular groove, so that it will follow their movements in the vertical
.direction. The forks of the arms of the curve-disc are adapted to slide upon the
guide-rods which are firmly connected with the frame.

page_text: In lieu of a disc provided with an elliptic or circular groove, any other suitable
curved groove can be employed if its bends are not such as to interfere with the
proper operation of the machine.
Dated this 22nd day of October 1888.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Machines for Cutting out Oval and other Sheets of
Cardboard, Paper, and the like.
I HERMANN WELCKER, of 35, Linkstr., Berlin, W., in the Empire of Germany,
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 :-
In the manufacture of various articles, for example boxes, cases, lables for bottles,
playing-cards, and the like, it is necessary to cut out cardboard or paper sheets in
such a manner that the outer circumference of the samo is of oval or other shape.
Heretofore use has been made for this purpose of knives or cutters bent to the form
to be given to the cardboard or paper. Such knives or cutters, owing to the difficulty
experienced in their manufacture, are very dear, and as a special knive must be used
for each form, the expense for these knives or cutters forms a considerable factor in
the manufacture of the said articles.
Now I have devised an improved machine in which, after loosening a few screws,
the parts can be adjusted for cutting out elliptical or circular sheets of any size.
The said apparatus is represented in the accompanying drawing, in which,
Figure 1 is a vertical section.
Figure 2 is a side elevation of the apparatus.
Figure 3 is a plan of the device for effecting the upward and downward movement
of the knife.
Figure 4 is a plan of the grooved disc.
Figure 5 shows the knife rod with adjusting-block and bearing for the same in
the head.
This machine comprises a spindle 6 having at one of its extremities a plate a by
which a pile of the cardboard, paper or the like to be cut is pressed against a bottom
plate c of the apparatus, Figures 1 and 2. The said spindle is actuated by means of
a hand-wheel or the like d, the nave of which forms a nut which is held upon the
frame e of the machine so that it cannot be displaced endwise. Upon the spindle 6 is
slid a sleeve or hollow spindle having a longitudinal groove with which engages
the key or feather g¹ of one of a pair of bevel-wheels g which is supported so that it
is prevented from moving end wise. By the turning of a crank k the aforesaid sleeve
or hollow spindle f is operated through the medium of the above mentioned bevel
wheels g, i.
In the head of the said sleeve or hollow spindle is arranged a fork / at one end
of which is fixed the knife or cutter m. Upon the other end of the fork is, slid a
block n carrying a stud or pin o which engages with an elliptical groove in a curve-
disc q, Figures 1 and 4. As the said head & is compelled by a key k placed in a
groove of the same to participate in the rotation of the sleeve or hollow spindle, the
fork will also be carried away, Figures and 5. The above mentioned stud or
pin o, as the curve-disc q is prevented by its arms q¹ from turning, will now move the
fork to and fro in the said head. The knife or cutter will therefore also describe an
ellipse or the like according as the distance of the knife or cutter from the centre of
the spindle is equal to the semi-major axis of the ellipse or longer than this. The
proportion between the semi-major and semi-minor axis is optional, in case the two
axes are as 1.1 a circle is produced.

page_text: In order that the knife or cutter shall be able to descend in accordance with the
number of sheets cut through, the aforesaid sleeve or hollow spindle f, knife head and
curve-disc
are arranged to be moved up and down. With an annular groover in
the sleeve or hollow spindle engages the claw provided on a hand-levers which, being
acted upon by a spring s¹ will press the sleeve or hollow spindle downwards
Figures 1 and 3.
If for the purpose of inserting a fresh pile of cardboard, paper
or the like the knife or cutter shall be raised, the handle of the said hand-levers is
pressed downwards and a pawl t is caused to engage with the teeth of a ratchet
wheels upon the shaft of the hand-lever s. The latter will then maintain the sleeve
or hollow spindle and knife head in their highest position until the pawl is disengaged
after the fresh pile has been clamped.
The above mentioned head k is kept by a nut u upon the sleeve or hollow spindle
and the curve-disc is placed between the said head and the collar on the lower side of
the aforesaid annular groover so that it will follow their movements in the vertical
direction. The forks of the arms 9' of the curve-disc are adapted to slide upon the
guide-rods q which are firmly connected with the frame.
In lieu of a disc q provided with an elliptic or circular groove, any other suitable
curved groove can be employed if its bends are not such as to interfere with the
proper operation of the machine.
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 is :-
First. A machine for cutting out oval or circular sheets of cardboard, paper, or the
like, comprising a knife turning upon an axis and displaced radially by a stud or pin
turning with the knife and positively guided by the elliptical groove of a stationary
disc, or if the semi-axes of the ellipse are equal to each other is held at the same
distance from the rotary axis.
Second. In the machine above described the pressing down of the knife and of the
curve-disc guided in a straight line by a spring-loaded lever the axis of which carries
a ratchet-wheel with which a pawl is caused to engage when the knife is raised.
Third. In the machine characterized in the first claim the clamping device for the
paper or the like to be cut, consisting of a spindle extending through the driving
spindle.
Dated this 2012
1000
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant.