Improvements in or relating to Knives for Cutting or Scoring Paste- board and other Analogous Materials.
Year: 1889

page_text: Date of Application, 23rd Apr., 1889
Complete Specification Left, 8th Jan., 1890-Accepted, 15th Feb., 1890
PROVISIONAL SPECIFICATION.
Improvements in or relating to Knives for Cutting or Scoring Paste-
board and other Analogous Materials.
A communication from EMIL SALTZKORN, Consul, and LUDWIG NICOLAI, manufacturer,
both of 21, Lobtauerstrasse, Dresden, in the Empire of Germany.
I, ALFRED JULIUS BOULT of 323 High Holborn in the County of Middlesex,
M.I.M.E., do hereby declare the nature of this invention to be as follows:-
The present invention refers to improvements in knives or devices for cutting or
scoring paste-board such as is used for the manufacture of boxes and the like.
The knife which forms the subject of the present application attacks the card-board
in three places simultaneously in consequence of its peculiar construction; in this
manner the cutting or scoring is considerably facilitated, the card-board is less
impetuously attacked and a cleaner and more suitable cut is produced.
On a preferably quadrangular beam the knife carrier slides in a dove-tailed groove.
The knife which is of a wedge shaped form and provided with a straight cutting
edge, is flattened off towards the back where it is fastened to the knife holder by
means of screws.
The knife is secured against lateral movement or displacement by being embedded
in a recess formed in the knife holder. Towards the front the knife diverges into two
cutting edges standing obliquely to one another in the form of a swallow tail. These
latter edges are also curved upwards so that the card board which is being fed towards
the knife is first attacked by the said curved edges and the deepest cut is made last.
The whole cut is thus made gradually so that inferior and even more woody material
can be operated upon with this knife without the danger of splitting or tearing.
This cutting or scoring device further facilitates the work as the resistance is
distributed over a comparatively large surface.
Each of the sides of a score made by the before described knife is formed with
preferably two inclined faces, so that when the card-board is folded or bent to form a
box or the like, glue or other suitable cement may be introduced into the open parts
or mouths of the joints.
Dated this 92nd down of to: 1900
COMPLETE SPECIFICATION.
Improvements in or relating to Knives for Cutting or Scoring Paste-
board and other Analogous Materials.
A communication from EMIL SALTZKORN, Consul, and LUDWIG NICOLAI, manufacturer,
both of 21, Lobtauerstrasse, Dresden, in the Empire of Germany.
.
I, ALFRED JULIUS BOULT of 323 High Holborn in the County of Middlesex,
M.I.M.E., 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 :-
The object of this invention is a knife for scoring card-board to be used in the
manufacture of boxes and the like.
Owing to its peculiar form this knife acts upon the card-board at three different
points at the same time, and only scores it. By this means the knife is enabled to
perform its work more easily and its action upon the card-board is rendered less
forcible than the device used for the same purpose hitherto and lastly a sharper
and more serviceable cut is obtained.

page_text: In the accompanying drawings ;-
Fig. 1 is a plan of the knife viewed from below; Fig. 2 is a section thereof; Fig. 3
a front view; Fig. 4 a piece of card-board considerably enlarged and Fig. 5 the same
piece, also enlarged, and bent at the cut or scored part. Fig. 6 is a side view of a
modification of the scoring knife and Fig. 7 a front view thereof.
To a stock a preferably of rectangular form is attached the knife holder 6 which is
adjustable in a groove and carries the improved scoring knife c. This knife is mitre
or wedge-shaped as shown at Figs. 1 and 3 and has a straight cutting edge c¹. It is
flattened at its backward portion where it is attached to the knife holder by means of
screws. Being embedded in a groove provided for the purpose in the holder b it is
prevented from lateral displacement. In front, the knife terminates in a swallow tail
formed of two curved blades or cutters c² c² set at an angle to each other.
The card is supposed to be placed on a table t moved along by a carrier or feed
roller w, see fig. 2. When it is thus brought under the knife the curved blades hegin
by effecting a flat and rather shallow cut, which however grows deeper gradually, and
the action of the knife upon the card-board is thereby rendered less abrupt and sharp
than it would be if the deepest cut were made at once; so that card-board of an
inferior quality and containing more wood, can be operated upon without any fear of
the blades slipping off or of the card-board being torn. This scoring knife also adınits
of a much easier operation of the machine; this as well as the advantage mentioned
before, being due to the distribution of the resistance over the larger surface of the
tool and the various directions of its action.
In the modification shown in figs. 6 and 7 the knife instead of being mitre-shaped,
has the form of a plough-share; here too, however the straight blade e divides into
two curved ones c² c² inclined towards each other. The knife is attached to the knife
carrier by means of its side piece or extension which is screwed thereto by
bolts dd. The plough-share forin of the knife permits an easier removal of the
chippings so that the whole surface of the cut is better exposed to view.
By the combination of the two curved blades with a straight one, a cut such as
represented in fig. 4 is obtained. This peculiar shape of the cut is of great advantage
in making band-boxes and the like, inasmuch as when the card-board is bent at right
angles the gradually flattening edges of the cut leave a space between them, whereby
some play is allowed to the compressed portions of the joint, and, when it is desired
to apply the glue within the box, the same is by the shape of the cut, enabled the
better to enter the joint.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, as communicated to me
by my foreign correspondents, I declare that what I claim is ;-
1. A mitre or wedge-shaped scoring knife for card-board the straight blade c' of
which divides into two curved blades substantially as described and shown in
figures 1 and 3.
2. A scoring knife for card-board constructed and operating substantially as
described and illustrated in figures 6 and 7 of the accompanying drawings.
Dated thin 9th L1000
W. P. THOMPSON & BOULT,
Agents for Applicant.