An Improvement in Machines for Cutting out the Corner Pieces of Blanks for Cardboard and the like Boxes.
Year: 1887

page_text: Date of Application, 17th Nov., 1887
Specification Accepted, 27th Dec., 1887
An Improvement in Machines for Cutting out the Corner Pieces of
Blanks for Cardboard and the like Boxes.
We THOMAS FURNIVAL of the Reddish Ironworks Reddish in the county of
Lancaster Engineer, EDWARD TUDOR the younger of the Reddish Ironworks Reddish
in the county of Lancaster Cashier, CHRISTOPHER PRESTON of Devonport Green
Wilmslow in the county of Chester gentleman and WILLIAM BYWAY of No. 138
Princess Street Manchester in the county of Lancaster plumber do hereby declare the
nature of our invention for AN IMPROVEMENT IN MACHINES FOR CUTTING OUT THE
CORNER PIECES OF BLANKS FOR CARDBOARD AND THE LIKE BOXES, and in what manner
the same is to be performed to be particularly described and ascertained in and by the
following statement and accompanying drawings:-
Our said invention relates to the cutting device or knives of machines used for
cutting out a rectangular piece from the corners of sheets of carlboard or other
material used in the making of boxes. The knives of such machines are usually
arranged vertically, one of the knives being fixed in such a manner that its upper or
cutting edge is on a level with the surface supporting the material which has to be
cut. The upper knife has a reciprocating or up and down motion communicated to it
by a suitable arrangement of mechanism. Generally such motion of the upper knife
is obtained by attaching the knife to a sliding frame or carrier which is caused to
move upwards and downwards by an excentric or cam. In machines of this class as
heretofore constructed the upper knife is during the upward stroke lifted clear or out
of contact from the lower knife and in the event of there being the slightest play or
want of accuracy in the adjustment of the sliding frame carrying the knife or in the
knife itself the latter is liable in its descent to cross or overlap the cutting edge of the
lower knife instead of sliding past it.
To remove this defect we arrange the knives in such a manner that their adjacent
surfaces or the adjacent surfaces of the parts of the machine to which the knives are
attached are not removed from sliding contact with each other during any portion of
the traverse of the upper knife.
In order that our invention may be properly understood we will proceed more
particularly to describe the same with reference to the annexed sheet of drawings.

page_text: Fig. 1 of the said drawings represents the corner of a sheet of cardboard or other
material to be operated upon, the dotted portion a shows the part which is cut away
by such machines as our invention relates to.
Fig. 2 is an elevation of a portion of such a machine as above referred to showing
the upper knife at the highest point in its course.
Fig. 3 is a plan of the knives. The same letters refer to the same parts in all the
figures.
Referring to Fig. 2b is part of the headstock on which the moving piece C which
carries the upper knife moves up and down. A shaft e is mounted in bearings in the
headstock band is provided with suitable gearing so that it may be caused to revolve.
At the end of the shaft e is a turned stud or projection f which placed excentrically
with reference to the centre of the shaft e. This stud or projection works in a slide
block 9 in the opening h of the part c. By means of this combination of parts a recipro-
cating up and down motion is imparted to the upper knife when the shafte is caused to
revolve. J is the table of the machine on which the material which it is desired to
cut is placed, adjustable fences or guides may be mounted thereon as is commonly done
to regulate the size of the piece to be cut out for the purpose of forming a corner.
K is a portion of the pillar or support for the machine. A part of the table is supposed
to have been removed for the purpose of clearly showing the upper and lower
rectangular knives d & d¹ when the upper knife is at the highest point in its course.
At the ends of the knives I provide projections or guide pieces 17 & 11 of such a
size and shape that in whatever relative position the knives may be with regard to
each other when in use some portion of the adjacent surfaces thereof may remain in
sliding contact with each other and thus prevent the cutting edges of the knives from
crossing or overlapping each other. Although the method illustrated in the drawing
and above described is a convenient and suitable way of carrying out our invention
we wish it to be understood that we do not confine ourselves to such a method; for
instance the projections may be formed on or attached to the holders or parts of the
machine to which the knives are fastened and such projections need not necessarily be
confined to the plane of the adjacent sliding surfaces of the knives, nor need the
projections or prolongations 1 or 11 be of the exact shape shown in the drawings.
Having now particularly described and ascertained the nature of our said invention,
and in what manner the same is to be performed we declare that what we claim is―
1. In machines for cutting out corner pieces the use of guide pieces (in connection
with the upper and lower knives) in constant sliding contact with each other
substantially as hereinbefore described.
2. In machines for cutting out corner pieces the use of knives of such a configuration
as to ensure that some portion of the surfaces thereof nearest to each other shall be
in constant sliding contact with each other during the whole of the up & down course
of the upper knife substantially as hereinbefore described.
3. In machines for cutting out corner pieces the formation and use of projections
or prolongations at both ends of the upper and lower rectangular knives working in
constant sliding contact with each other in such a manner as to prevent the crossing
or overlapping of the cutting edges substantially as herein before described and shown.
Dated this 16th day of November 1887
JULIUS ALLMANN & Co.,
70, Deansgate, Manchester,
Agents for Applicants.