Improvements in Slitters and Cutters for Paper and like Material.
Year: 1890

page_text: Date of Application, 30th May, 1890-Accepted, 30th Aug., 1890
COMPLETE SPECIFICATION.
Improvements in Slitters and Cutters for Paper and like Material.
We, CHARLES KOEGEL, and CARL VON NEUBRONN, both of No. 628 Bridge Street,
Holyoke, in the County of Hampden and State of Massachusetts, Engineers, do
hereby declare the nature of our said invention, and in what manner the same is
to be performed, to be particularly described and ascertained in and by the following
statement
Our invention relates more especially to Slitters and Cutters for use in paper
making machines, but the device herein illustrated may also he profitably employed in
slitting and cutting other material than as herein especially pointed out.
The construction and operation of slitters and cutters heretofore made has been
objectionable, because of the difficulty found in producing a straight, smooth even
and uniform cut and because the construction has been such that the devices
were cumbersome, easily got out of order, complicated and difficult to set, operato
or repair.
The old devices have also been objectionable in many respects in addition to those
enumerated, which objections are too well known in the art to require specific
reference herein.
The object of our invention is to do away with the objectionable features hereto-
fore existing-and--to produce-a-device-which-shall be simple-in-construction,
comparatively inexpensive in manufacture, easily adjustable and perfect and complete
in its operation; and to that end, therefore, our invention consists in the construc-
tion and arrangement herein set out, whereby the objects of our invention are
attained.
In the accompanying drawings, in which like letters of reference indicate like
parts.
Figure 1 is a side view of a portion of a paper making machine, the frame having
my device attached thereto.
Figure 2 is a view of a section of the same as seen from the right of Figure 1, and
Figure 3 is a top view of the same.
Figure 4 is a view on an enlarged scale of the adjustable support or hanger, having
the cutter blade mounted thereon, the blade being shown in section.
Figure 5 is a view of the same as seen from the right of Figure 4, the cutter in
the latter case being shown in full lines, and
Figure 6 is a view in section of an eccentric collar or bearing, having a cutter
mounted thereon.
In detail, a indicates the side rail of a paper machine, the upright part of the
same, c the top rails, d the top cutter frame or support;, the lower cutter; g, a
lock nut; h, a locking clamp; n, the stem on the same; i, adjustable bearings ;
j, j feed rolls; k, guide or spread roll; l, cutter hub; m, shaft upon which the
top cutter is mounted, and o the lower cutter shaft.
The construction and operation will be readily understood on reference to the
drawings in connection herewith. A frame is adjustably secured to a frame a
and is provided at the top with rails c, and c' which extend across the machine,
one of the rails being slotted to permit the passage of the stem n of the clamping
piece h.
A box or carrier p, having flanges at the top and bottom, slides between the rails c,
and c and has an opening perpendicularly through it to permit of the passage of
the stem d, which stem is threaded at its upper end and passes through a lock nut
threaded to fit the threaded portion of the stem, which nut rests upon the top of
box p.. The lock nut 9, preferably consists of two half nuts fastened together by
set screws passing through their flange as shown.

page_text: A clamping piece / fits loosely within the box p, and the stem d passes through
it. The stem 2 of the clamping piece extends through the side of the box p and
also through the slot in the front rail et. A thumb-nut r, threaded to fit the stem n,
is mounted upon it and when turning in one direction the nut will bear against the
rail c, and thus draw the stem a and clamping piece towards the rail, against
which the nut bears so that the collar or part h will bear against the stem d and hold
it firmly locked in position.
The permanent perpendicular adjustment of the cutter frame is accomplished by
turning the lock-nut g to the right or left, thus raising or lowering the framed and
when the same is once adjusted, the set screws in the lock nut are tightened, thus
permanently fastening the nut 7 in position.
Now, when it is desired to raise or move the frame d, the thumb nut is loosened,
thus allowing the stem d to be carried to the right or left, or to be raised if desired;
and when the frame dis again horizontally adjusted so that the cutter mounted
upon it is in proper position with their cutting edges bearing against the lower
cutting blades, the perpendicular adjustment is readily accomplished by dropping the
stem & until the lock nut g bears upon the top of the box p. The blade may,
therefore, in a moment be brought to the same perpendicular adjustment.
We prefer to make the cutting blades of a somewhat concavo-convex form. This
enables us to give a finer and nicer angular adjustment to the blades and the wear
on the face of the blades tends to sharpen them rather than otherwise.
say,
The stem is preferably made straight and from one side is projected a shaft m,
upon which the top cutter is mounted in the manner shown in Figure 4; that is to
the part of the cuiter hub fits the shaft m and the remaining portion of the
hub is chambered to allow of the insertion of the spiral spring t, against the outer
end of which a collar bears, which collar is of a size to fit within this end of the
hub and a pin passing through the shaft m serves to hold the collar u in position,
thus maintaining the spring within the chamber and through the action of the
spring 'forcing the hub with cutter attached, towards the part d.
The cutter,
therefore, on its shaft has both a rotary and horizontal motion.
A lever wis pivotally mounted in the lower portion of the hanger
and its inner
end is adapted when carried to a horizontal position, to bear against the face of the
cutter
e, and
carry it away from contact with the lower cutter and when the lever w
is returned to its normal position, as indicated in Fig. 4, the cutter will be forced
through the action of the spring t back to its first position.
To obtain the best results, that is, to make a clean, sharp, shear cut, it is desirable
that the top cutter should be set at an angle with the lower cutter, thus causing the
two blades to shear at an angle and to accomplish this, I turn the frame d slightly to
the right or left, as the circumstances may require, thus giving it the desired angle
of the cutting edges; and to accomplish this result we prefer to construct the device
as shown in Figure 4, and to rely upon the locking means h to hold the parts at the
desired angle.
We have, however, in some instances, constructed the frame d in
such a manner that it is not free to be revolved within its frame and to bring the
cutters to the desired angle. We provide a cam-shaft m', as illustrated in Figure 6,
which cam-shaft is mounted upon the shaft m, and fastened thereto with set screws ;
and the adjustment as to the cutting angle is accomplished by revolving the cam
shaft m² more or less to the right or left as may be desired. The spring, in this
case, may be mounted upon the cam shaft m¹, and within the hub , as before
described, or may be disposed between the annular flange upon the cam shaft m¹ and
the open end of the hub.
The guide rolls operate to guide the paper and maintain the sheet on a plane with
the union of the cutting edges, thus preventing tearing which might otherwise
result. These rollers are supported in adjustable bearings i, which bearings are
provided with set screws a for the purpose of adjustment.
Two cutting blades may be mounted upon one hub if desired and so arranged that
either or both of the cutters may be used. We deem the arrangement shown in the
drawing, however, the best.

page_text: During the process of manufacturing paper it is found that the sheet dries more
rapidly at the center than at the edges, and as it contracts as it dries the center,
after a short time, is the shortest, and if the sheet runs over rolls of uniform diameter
the edges of the sheet are liable to become wrinkled; and to avoid this we provide a
concave roll k, and locate the same next the feed roll j, so that the curved face or
surface of this roll will strain and take up the slack at the edges, thus maintaining
the sheet in a smooth and uniform condition and avoid the wrinkling at the edges
and tearing, thus enabling us to make a sheet of paper free from wrinkles and
enabling us also to make a more straight and accurate cut with the slitting
appliances.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
1 A slitter having a movable frame provided with cutter supporting means and
attached to a single arm or part, substantially as shown.
2: A cutter frame for slitters, having a single depending arm, provided with a
cutter shaft in combination with a rotary cutter mounted thereon, substantially as
shown.
3: In a cutting or slitting machine, a movable frame d in combination with a
clamp piece and means to draw the part h against the part d, whereby the same is
locked in position, substantially as shown.
4 In a slitter frame as d having its upper portion threaded, a lock-nut g
fitted thereto, and a clamping-and locking means all_in_combination, substantially as
shown.
5: In combination with a paper machine provided with lower rotary cutters, one
or more upper cutters mounted upon a depending frame adapted to turn, to bring
those cutting edges together at an angle, substantially as shown.
6: A slitter having rails c, a sliding box p, fitted thereto, a lock nut as g, a
clamping means and cutter, all in combination substantially as shown.
7 In a slitting or cutting machine, a concavo-convex cutting disk blade,
substantially as shown.
8: In a slitting machine, a cam shaft m¹, in combination with a rotary cutting
blade and supporting frame, substantially as shown.
9:-A slitting machine having guide rolls j, j supported in adjustable bearings,
substantially as shown.
10 The combination in a paper slitting machine of a stretcher roll k, the same
being of larger diameter at the ends than at the center, substantially as and for the
purposes shown.
11 The combination of a stem d, adapted to be adjusted horizontally and
perpendicularly and provided with a rotary cutter e, with a lower rotary cutter f, all
arranged substantially as stated.
12 The supporting stem d, provided with a shaft or boss m in combination with
:
a rotary disk e and a lever w, substantially as and for the purposes stated.
13: In a slitting machine, the combination of a support part d provided with a
shaft m and having a collar u with cutter e mounted on hub l, and spiral spring t
arranged within the hub, substantially as and for the purposes stated.
Dated this 30th day of May 1890.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicants.