Improvements in or relating to Knives for Cutting Out Leather or any other Material.
Year: 1894

page_text: Date of Application, 22nd Dec., 1894
Complète Specification Left, 23rd Sept., 1895-Accepted, 25th Oct.,
1895
PROVISIONAL SPECIFICATION.
Improvements in or relating to Knives for Cutting Out Leather or
any other Material.
I, HENRY JAMES CREESE of No. 50 Chester Street Leicester in the County of
Leicester Engineer, do hereby declare the nature of this invention to be as
follows:-
This invention has for its object improvement's in or relating to knives for cutting
out leather or any other material, such knives being made by forging from lengths
of steel to produce what are known as "deep knives" used in presses for cutting out,
sole and other blanks or shapes used in the manufacture of boots and shoes, and
other articles The lengths of steel aro rolled out flat with a taper at one edge
ground to a "knife edge" after forging, the inside of the formed knife has thon to
be filed, ground and polished to allow of the soles or other shapes to clear the knife
and be thrown out. This of course entails a vast amount of labour and the kmves
are then not upright,
I desire to obviate this by causing the lengths or bars of steel to he rolled out
with a tapered edge for grinding the knife edge, but the opposite face along this
edge for about five eights of an inch or thereabouts is thicker having a pinjection
or lip, which after the knife lias been forged forms on the inside of the knife a
perpendicular surface to the outside cutting edge, the upper end of such lip
projecting from the other portion or body of the knife which in this case does not
require to be filed, ground or polished. Such body may also be tapered upon the
inside from the said lip projection if desired to better facilitate the throwing out of
the Blanks. The lower inside projecting portion of the knife is of comic fifed and
cleaned out to give the exact shape or pattern to which it is desired to cut the sole
o other blank,
Said lip portion considerably strengthens the kife at the cutting, or most
particular point, and the kmves are forged perfectly upright to clear or "elip
through" the necessary quantity of blanks, two or more being held in the lip portion
while the remaining blanks or shapes in the body portion are easily cleared and
thrown out of the knife.
Deted the 18th day of December 1891.
W. B. MAXFIELD,
Applicant's Agent.
COMPLETE SPECIFICATION.
Improvements in or relating to Knives for Cutting Out Leather or
any other Material.
1, HENRY JAMES CREESE of No 50 Chester Street Leicester in the County of
nhat
Leicester Engineer do hereby declare the nature of this invention and in w
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement :-
This invention has for its object improvements in or relating to knives for cutting
out leather or any other material, such knives being made by forging from lengths

page_text: of steel to produce what are known as "deep knives" usel in presses for cutting
out sole and other blanks or shapos used in the manufacture of boots and shoes, and
other articles.
In the ordinary way the lengths of steel are rolled out flat with a taper edge to
be ground to a knife edge" after forging, after the knife has been formed the
inside has to be filed, ground and polished to allow of the soles or other shapes to
clear the knife and be thrown out. This entails a vast amount of labour and still
the hives are not upright upon the inside of the cutting edge.
In order that my invention may be well understood I have appended a sheet of
drawings in which
Figure 118 a view in perspective of a sole cutting "deep knife" made according
to this invention.
Figure 2 an upper view of same broken off at the hoel portion to shew the bead
or lip B, and
Figure 3a sectional end view of a strip of steel for making said knife in
accordance with this invention.
To obviate the before-mentioned defect I cause the lengths or bars of steel A to
be rolled out, with a tapered edge for grinding the knife edge see dotted line X
Figure 3, and the opposite face along this edge for about five eights of an inch o
thereabouts is thicker being provided with a projection or lip B which after the
knife bas been forged forms on the inside of the knife a perpendicular surface to
the outside cutting edge, the upper end of said lip or bead B standing out from the'
other portion of body of the huife and does not requie to be either filed or ground,
said body may also be tapered upon the inside, as C Figure 3 from the said h
projection or strengthening bead when desirable to better facilitate the throwing
out of the blanks. The lower inside bead or projecting portion of the knife is of
course filed and cleaned out to give the exact shape or pattern to which at 15
deaned to cut the sole or other blank.
The advantage of the lip or bead is that the cutting edge of the knife is at its
inost particular part considerably strengthened, and the knives when forged are
perfectly upright to better clear or "slip through "the necessary quantity of blanks
two or more being held in the lip portion while those remaining in the body portion
are easily cleared and thrown out of the knife.
It will be obvious to anyone that this invention can be applied to other knives
or cutters than the "deep knife" shown in the drawings for the purpose has
hereinbefore described.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, declare that what I
claim is
-
1. In knives of the character described, the upright projection or lip B, as hei ein
specified.
2. Improvements in or relating to knives for cutting out leather blanks, or blanks
or shapes of other material by the upright projection, lip or bead B and tapered
body in the manner substantially as described.
Dated this 21st day of September 1895.
W. BESTWICK MAXFIELD,
Registered Patent Agent,
19 Bowling Green Street, Leicester, Applicant's Agent.