AN IMPROVED PUNCH FOR CUTTING LEATHER AND OTHER MATERIAL
Year: 1884

page_text: I, ARTHUR THOMAS PERRINS of N° 77 Colmore Row Birmingham in the
County of Warwick Saddlers Tool Maker do hereby declare the nature of my
invention for "AN IMPROVED PUNCH FOR CUTTING LEATHER AND OTHER
MATERIAL"
to be as follows, that is to say :-
..
My invention is for the purpose of so forming punches used in cutting leather
and other material that less power is required in cutting holes and the punches will
make holes in common material without the liability of splitting or staring which
exists in the use of the present punches. The punches now in use are made from
a piece of metal beaten out at the point and bent around and welded and the outside
part is ground and polished and the point is made a beveled or chamfered cutting
edge. A certain amount of unevenness outside has always existed in such punches
and undue friction and unequal strains has characterized their action.
Now my cutting punches are made black and yet they cut splendidly; The
mode of manufacture is much the same as the old ones up to a certain point that is
to the bending around and welding the edges after which I rimer out the inside
with a taper rimer and I then turn the point in a lathe or other convenient tool so
as to make. it exactly even without ridges or unequalities and the point instead .of.
being bevelled or chamfered is beautifully rounded to an edge from the conical
exterior and by this means the friction is equal on all sides of the punch and the
action is gentle and smooth. There is thus less liability of the punch turning out
of the required direction and less power is required in its use.
These punches may be made of steel, or of iron with steel points.
Dated this 19th day of June 1884.
JOHN KENDRICK,
Agent for the Applicant,
Birmingham.

page_text: I ARTHUR THOMAS PERRINS of 77 Colmore Row Birmingham in the County
of Warwick, Saddlers Tool Maker do hereby declare the nature of the said
invention for "AN IMPROVED PUNCH FOR CUTTING LEATHER AND OTHER
MATERIAL" and in what manner the same is to be performed to be particularly
described and ascertained in and by the following statement as follows that is to
say
My Invention is for the purpose of so forming punches used in cutting leather
and other material that less power is required in cutting holes and the punches will
make holes in common material without the liability of splitting or staring which
exists in the use of the present punches. The punches now in use are made from a
• piece of metal beaten out at the front and bent around and welded and the outside
part is ground and polished and the point is made with a bevelled or chamfered
cutting edge.
A certain amount of unevenness outside has always existed in such punches and
undue friction and unequal strains has characterised their action.
Now my cutting punches are made black and yet they cut splendidly. The
mode of manufacture is much the same as the old ones up to a certain point that
is to the bending around and welding the edges after which I rimer out the inside
with a taper rimer and I then turn the point in a lathe or other convenient tool so
as to make it exactly even without ridges or inequalities and the point instead of
being bevelled or chamfered is beautifully rounded to an edge from the conical
exterior and by this means the friction is equal on all sides of the punch and the
action is gentle and smooth. There is thus less liability of the punch turning out
of the required direction and less power is required in its use. These punches may
be made of steel or of iron with steel points.
In order that my invention may be clearly understood and more easily carried
into practice I have appended hereunto a sheet of drawings showing three views of
one of my improved punches.
Figure 1. is a front elevation of a punch.
Figure 2. is a side elevation of the same punch.
Figure 3. is a sectional side elevation of the same punch.
Now after the punch is forged and welded round as previously explained the
inside A is rimered out or otherwise made true so as to be perfectly round internally.
I then turn the outside of the punch from say b to be quite round so as to be free
from ridges or enequalities of all kinds and having the point gently curved or
rounded from say b to b'. The result is that when the punch is driven into a piece
of leather or other material the pressure is even and equal all round the point and
thus there is no liability for the hole to be made crooked as in the case with simply
ground pointed punches.

page_text: 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
The improvements in punches for cutting leather and other material of a punch
outwardly turned true and rounded in a lathe or other tool from say b to b¹ and 6*
in combination with a sufficiently true bore whether machined internally or not
substantially as and for the purpose herein set forth.
Daded L
1007
JOHN KENDRICK,
Agent for the Applicant,
77, Colmore Row, Birmingham,