Sheets or Plates of Paper, Strawboard, Metal, or other Material.
Year: 1888

page_text: Date of Application, 21st Mar., 1888
Complete Specification Left, 21st Dec., 1888
Complete Specification Accepted. 29th Jan., 1889
Sheets or Plates of Paper, Strawboard, Metal, or other Material.
I MARK DEAN KNOWLTON of 155 Michigan Avenue, Chicago, Cook County, in the
State of Illinois one of the United States of America, Manufacturer do hereby declare
the nature of this invention to be as follows:-
This invention relates to a novel construction in punches of that kind used for
cutting objects of various shapes from sheets or plates of paper, straw-board, metal or
other material. The invention consists in the matters hereinafter described and
pointed out.
A punch embodying my invention, embraces, in addition to the projecting part
carrying the cutting edge by which the object to be formed is severed about its
margins from the plate or sheet, an auxiliary cutter, extending outwardly from the
main cutting edge of the punch, and acting to sever the material of the sheet or plate
across the part between the line at which the sheet is cut by the punch and the
aperture left by the removal of the piece previously cut out. The auxiliary cutter
thus serves to trim the edge of the sheet as the cutting progresses, so as to leave the
sheet with an even or uniform edge and in convenient form for handling.
In the apparatus as a whole, is embodied a frame or holder, adapted for attach-
ment to a press or other actuating device, and constructed to receive and hold a punch
of any size or shape. A solid punch of cylindric shape is attached to a holder by
means of a cylindric shank on the punch entering an axial recess in the holder, and
secured therein by means of a set screw. An auxiliary cutter, which is provided with
an acute or chisel edge, is arranged with one of its ends in contact with the side of
the punch. Said cutter may be held in operative position with relation to the punch,
by a clamping or holding device so arranged that the said auxiliary cutter may be
moved or shifted in position both laterally and endwise, to correspond with the form
or size of punch which is secured in the said holder.

page_text: The holder herein described is provided with a cylindric shank having an enlarged
Devices are
flat part or plate against which the punch directly rests or bears.
provided in the particular holder described for adjustably supporting the cutter, as
follows: The cutter in this instance consists of a flat plate bevelled at one side to
form an acute cutting edge. In the lower surface of the plate of the holder, is formed
a recess within which are located two clamp-plates arranged to bear against opposite
sides of the cutter. The said plates are held in contact with the cutter by means of
opposing set-screws inserted through opposite sides of the plate, and extending into
the recess in such manner as to sustain the clamp-plates in a desired position
therein.
Set screws are used for holding the clamp-plates in place, and a greater or less
number may be used in practice, as desired. The recess and clamp-plates extend
inwardly to a point adjacent to the shank of the punch, thereby enabling the auxiliary
cutter to be secured in place with its end in contact with a punch of smaller size
adapted to be placed in the holder.
By backing out or advancing the set screws, the clamp-plates and cutter may be
shifted laterally to bring the cutting edge in a desired position relatively to the cutting
edge of the punch, according to the width of the waste strip which it is desired to cut
from the margin of the sheet.
The cutting edge of the auxiliary cutter is set back from the lower face of the
punch such distance that when the punch is advanced into the opposing matrix the
full extent of its throw, the edge of the cutter will come in contact, or nearly in
contact, with the upper face of the matrix, thereby acting with direct pressure to cut
or sever the sheet in its part adjacent to the punch. Even if the cutter does not
come in actual contact with the matrix, the sheet will usually be cut sufficiently to
be easily separated and the general result desired thus attained. In the case of
material like thick straw-board, for instance, the oblique edge of the cutter will force
or break away the stock along the cut, so as to completely sover the same, when the
cutter passes only part way through the sheet.
In the use of a punch provided with an auxiliary cutter arranged as above described,
the sheet is fed to the punch with its edge approximately parallel with the cutter, and
is advanced to the cutter in such direction that the auxiliary cutter extends forwardly
from the punch, (referring to the direction of motion of the sheet) and is located at
the side of the cutting nearest the body or uncut portion of the sheet, so that the parts
of the sheet left between the cuts, are continually severed from the main part of the
sheet as the cutting progresses. In cutting circular discs the surplus material along
one line of holes will not be entirely severed until the cuts have been made through-
out the full length of the sheet.
The employment of an auxiliary cutter acting to trim the edge of the sheet as fast
as objects are cut therefrom by a punch is of especial utility in the case of a punching
machine embracing a guide or gauge for determining the position of the edge of the
sheet with relation to the punch, and also in machines having automatic feed devices
for the sheets, for the reason that the severing of the projecting surplus parts of the
sheets leaves a straight edge, or a series of projecting parts after each row of cuts,
whereby the sheet may be placed or held against the guide in a land feeding machine,
or the guides of the feed devices in an automatic machine, and the position of the
sheet thereby accurately determined.
The employment of the auxiliary cutter, severing the waste as the holes are formed,
furthermore, enables a gauge acting against the newly cut edge to be used in addition
to the back gauge, or that at the rear of the punch, heretofore employed. The use of such
second gauge greatly facilitates the handling of the stock, by affording a guide to
the advance of the sheet at the time the latter is so far advanced as to have but little
bearing upon the back gauge. Heretofore, in the use of a punching machine
having a back gauge to guide the stock, as well as in automatically feeding
machines, it has been common to cut the stock into narrow strips, somewhat wider
than the articles to be formed, in order to afford suitable guiding edges by which
each row of holes may be made. In the use of a punch made with such an

page_text: auxiliary cutter, as described, however, such cutting into strips is not required,
whereby the holes may be made closer to each other, with a large saving of waste,
and a corresponding economy in the use of the stock, and the labour of cutting the
stock into strips is avoided.
It will of course be understood that the auxiliary cutter arranged and operating
in the manner described, may be employed in connection with punches of any
shape, and when said punches have a cutting edge of either regular or irregular
form.
WM. BROOKES & SON,
55 & 56, Chancery Lane, London,
Agents for the Applicant.

page_text: 4344
Sheets or Plates of Paper, Strawboard, Metal, or other Material.
I MARK DEAN KNOWLTON of 155 Michigan Avenue, Chicago, Cook County, in the
State of Lilinois one of the United States of America, 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:
This invention relates to a novel construction in punches of that kind used for
cutting objects of various shapes from sheets or plates of paper, straw-board, metal or
other material. The invention consists in the matters hereinafter described and pointed
out in the appended claims.
A punch embodying my invention, embraces, in addition to the projecting part
carrying the .cutting edge by which the object to be formed is severed about its
margins from the plate or sheet, an auxiliary cutter, extending outwardly from the
main cutting edge of the punch, and acting to sever the material of the sheet or plate
across the part between the line at which the sheet is cut by the punch and the aperture
left by the removal of the piece previously cut out. The auxiliary cutter thus serves
to trim the edge of the sheet as the cutting progresses, so as to leave the sheet with an
even or uniform edge and in convenient form for handling.
In the accompanying drawings:
Figure 1 is a perspective view of a punch embodying my invention.
Figure 2 is a face view of the same.
Figure 3 is a side elevation of the same, showing the flat face of the auxiliary
cutter.
Figure 4 is a side elevation of the same, showing the auxiliary cutter in end-
view.
Figure 5 is a detail view of an adjustable clamp-plate employed for holding the
auxiliary cutter in place.
Figure 6 is a view of a sheet from which a series of discs have been cut by the
punch shown in Figures 1, 2, 3, 4 and 5 illustrating the action of the auxiliary
cutter.
In the drawings, Figures 1 to 5, A indicates as a whole a frame or holder, adapted
for attachment to a press or other actuating device, and constructed to receive and
hold a punch of any size or shape. B indicates a solid punch of cylindric shape, which
is attached to a holder A by means of a cylindric shank on the punch entering an axial
recess in the holder, and secured therein by means of a set screw B. Cis an auxiliary
cutter, which is provided with an acute or chisel edge, and is arranged with one of its
ends in contact with the side of the punch. Said cutter in the particular embodiment
of my invention herein shown, is held in operative position with relation to the punch,
by a clamping or holding device so arranged that the said auxiliary cutter may be
moved or shifted in position both laterally and endwise, to correspond with the form
or size of punch which is secured in the said bolder.

page_text: The holder A herein illustrated is provided with a cylindric shank A having an
enlarged flat part or plate A² against which the punch B directly rests or bears.
Devices are provided in the particular holder shown for adjustably supporting the
cutter C, as follows: The cutter in this instance consists of a flat plate bevelled at one
side to form an acute cutting edge. In the lower surface of the plate A² of the holder,
is formed a recess A within which are located two clamp-plates D D arranged to bear
against opposite sides of the cutter C. The said plates are held in contact with the
cutter by means of opposing set-screws EE inserted through opposite sides of the
plate A, and extending into the recess A³ in such manner as to sustain the clamp-plates
in a desired position therein. As herein shown, four set screws E E are used for
holding the clamp-plates in place, but a greater or less number may be used in practice,
as desired. The recess A³ and clamp-plates D D extend inwardly to a point adjacent
to the shank of the punch, thereby enabling the auxiliary cutter to be secured in place
with its end in contact with a punch of smallest size adapted to be placed in the
holder.
By backing out or advancing the set screws E E, the clamp-plates and cutter may
he shifted laterally to bring the cutting edge in a desired position relatively to the
cutting edge of the punch, according to the width of the waste strip which it is desired
to cut from the margin of the sheet.
The cutting edge of the auxiliary cutter C is set back from the lower face of the
punch such distance that when the punch is advanced into the opposing matrix the
full extent of its throw, the edge of the cutter will come in contact, or nearly in
contact, with the upper face of the matrix, thereby acting with direct pressure to cut
or sever the sheet in its part adjacent to the punch. Even if the cutter does not come
in actual contact with the matrix, the sheet will usually be cut sufficiently to be easily
separated and the general result desired thus attained. In the case of material like
thick straw-board, for instance, the oblique edge of the cutter will force or break
away the stock along the cut, so as to completely sever the same, when the cutter
passes only part way through the sheet. B, Figures 3 and 4, indicates the matrix,
and B a sheet laid over the same beneath the punch.
In Figure 3 the punch is shown as free from the matrix, but in Figure 4 it is shown
as advanced into the matrix a sufficient distance to carry the edge of the cutter C
through the sheet resting upon said matrix.
In the use of a punch provided with an auxiliary cutter arranged as above described,
the sheet is fed to the punch with its edge approximately parallel with the cutter, and
is advanced to the cutter in such direction that the auxiliary cutter extends forwardly
from the punch, (referring to the direction of motion of the sheet) and is located at
the side of the cutting nearest the body or uncut portion of the sheet, so that the
parts of the sheet left between the cuts, are continually severed from the main part of
the sheet as the cutting progresses.
The operation of the auxiliary cutter in the manner set forth may be more readily
understood by reference to Figure 6, which shows the marginal part of a sheet from
which a number of dises have been cut by a punch like that shown in Figures 1 to 5.
H, in said Figure 6, is the sheet, hh are a series of holes left by the removal of the
discs, and the lines h¹ indicate the cuts made by the auxiliary cutter.
In cutting
circular dises the surplus material along one line of holes will not be entirely severed
until the cuts have been made throughout the full length of the sheet, and in said
Figure 6 indicate the lines of the cuts made by the auxiliary cutter in punching
out a previous line of holes, while H indicates as a whole, the strip of surplus material
which will he severed from the sheet after the holes h h have been formed throughout
the full width of the sheet.
The employment of an auxiliary cutter acting to trim the edge of the sheet as fast
us objects are cut therefrom by a punch is of especial utility in the case of a punching
machine embracing a guide or gauge for determining the position of the edge of the
sheet with relation to the punch, and also in machines having automatic feed devices
for the sheets, for the reason that the severing of the projecting surplus parts of the
sheets leaves a straight edge, or a series of projecting parts after each row of cuts,

page_text: whereby the sheet may be placed or held against the guide in a hand feeding machine,
or the guides of the fred devices in an automatic machine, and the position of the
sheet thereby accurately determined.
The employment of the auxiliary cutter, severing the waste as the holes are formed,
furthermore, enables a gauge acting against the newly cut edge to be used in addition
to the back guage, or that at the rear of the punch, heretofore employed. The use of
such second gauge greatly facilitates the handling of the stock, by affording a guide
to the advance of the sheet at the time the latter is so far advanced as to have but
little bearing upon the back gauge. Heretofore, in the use of a punching machine
having a back gauge to guide the stock, as well as in automatically feeding machines,
it has been common to cut the stock into narrow strips, somewhat wider than the
articles to be formed, in order to afford suitable guiding edges by which each row of
holes may be made. In the use of a punch made with an auxiliary cutter, such as is
herein shown, however, such cutting into strips is not required, whereby the holes may
be made closer to each other, with a large saving of waste, and a corresponding
economy in the use of the stock, and the labour of cutting the stock into strips is
avoided.
It will of course be understood that the auxiliary cutter arranged and operating in
the manner described, may be employed in connection with punches of any shape, and
when said punches have a cutting edge of either regular or irregular form.
The main feature of novelty in my invention, embraces a punch and matrix or
similar cutting device, provided with an auxiliary cutter arranged to act against
opposing surface of the matrix to sever the blank sheet or plate in the part of the
latter adjacent to the cutter, in such manner as to cut or slit the said sheet or plate
outwardly from the opening made therein by the punch. As far as this main feature
of the invention is concerned I do not wish to be limited to any specific features of
construction shown but desire to claim broadly an auxiliary cutter constructed and
applied in the manner described. As for instance, appended sixth claim covers the
auxiliary cutter when made either integral with or separate from the punch proper,
or when either imniovably or adjustably connected with the punch or its support.
Such auxiliary cutter, furthermore, may obviously be arranged at any desired angle
with relation to the punch.
The particular construction shown in Figures 1 to 5, embracing means for adjustably
supporting the cutter forms a separate improvement which is herein specifically
claimed as part of my invention.
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 :
1. The arrangement or combination and use of the parts of a punching machine
for cutting objects of various shapes from sheets or plates of paper, straw-board,
metal or other material in manner and for the purposes substantially as set forth.
2. The combination and use with a punch and a die or matrix of an auxiliary cutter
either attached or cooperating with said punch to sever the material left by said
punch simultaneously with or immediately after punching of the desired forms as set
forth.
3. The combination, with a punch and a die or matrix, of an auxiliary cutter
extending outwardly from the punch, said auxiliary cutter having its cutting edge
set back from the cutting edge of the punch and arranged to act against an opposing
flat surface of the die or matrix, substantially as described.
4. The combination, with a punch, and a die or matrix, of an auxiliary cutter
attached to and extending outwardly from the punch, the cutting edge of said
auxiliary cutter being set back from the cutting edge of the punch and arranged to
act against an opposing flat surface of the matrix, and means adjustably connecting
said cutter with the punch, whereby the edge of the cutter may be adjusted with
relation to the opposing face of the matrix, substantially as described.
5. The combination, with a punch and a die or matrix, of an auxiliary cutter

page_text: extending outwardly from the cutting edge of the punch, and arranged to act against
an opposing flat surface of the matrix, and a holder for the said punch and auxiliary
cutter, said cutter being adjustably sustained in the holder by means affording both
an endwise and lateral adjustment of the cutter, substantially as described.
6. The combination with a punch, of a holder for the same provided with a shank
for attachment to a punching machine and with a plate supporting the punch, and
provided with a recess in its lower face, an auxiliary cutter, movable clamp-plates
located within the said recess, and opposing set screws inserted through said plate
and bearing against the clamp-plates, substantially as described.
ديد
3
1000
WM. BROOKES & SON,
55 & 56, Chancery Lane, London,
Agents for the Applicant.