Improvements in Apparatus for Scoring or Grooving Cardboard and the like.
Year: 1897

page_text: Date of Application, 5th Nov., 1897-Accepted, 11th June, 1898
COMPLETE SPECIFICATION.
Improvements in Apparatus for Scoring or Grooving Cardboard and
the like.
I, ANDREAS ANDERSEN, of 64A, Reinickendorferstrasse, Berlin, in the Empire
of Germany, Works Manager, 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 greatest of all the drawbacks connected with the apparatus hitherto
employed for scoring or grooving cardboard and the like consists in that the shaving
removed may easily produce a stopping up of the whole apparatus. In order to
avoid this many forms of construction have been adopted. Among others it was
thought possible to avoid the above mentioned drawback by mounting the two
grooving knives on axes lying in different vertical planes, one knife being allowed
to precede the other so far that the shaving ejector arranged at the side of the
second circular knife lay entirely free to one side. This advancement of one
knife in front of the other must however be somewhat considerable, as otherwise
the first knife always partially covers the shaving, ejector and thus renders impos-
sible a displacement of the shaving to the side. There also resulted as experience
and many experiments have shown another drawback, namely, that it was
absolutely impossible to obtain a groove with sharp edges when one circular knife
was too far in advance of the other.
In order to enable a really sharp edged groove to be made in ordinary scoring and
grooving apparatuses as the above mentioned experiments have shown the amount
which one knife precedes the other must amount at the highest to five millimetres.
Such an arrangement of one knife in advance of the other does not however allow the
shaving ejector to lie at one side entirely freely and the stoppage or stopping up of
the whole apparatus by the produced shaving cannot be avoided.
If however the two circular knives be brought into such an inclined position
that their planes form an angle and the space in which the shaving travelling
over the shaving ejector is carried be gradually increased, any choking of the
whole apparatus is entirely prevented. Sharply cut edges may thus be obtained
with a suitably small selected separation of the circular knives when the latter are
placed in an inclined position and any stopping up of the shaving apparatus is
prevented.
An apparatus constructed in this manner is shown in the accompanying draw-
ings, in which,
Figure 1 is a sectional side view;

page_text: Figure 3, a horizontal section of the under part of same on the line x, y, of
Fig. 1.
Fig. 4 a similar section on the line x, 2, of Fig. 1.
The actual scoring or grooving apparatus H is attached to the machine frame a
by means of a screwed lug b in such a way that the whole apparatus may be adjus-
ted as regards its vertical position by means of a screw c which is passed through
the rectangular part of the screwed lug b.
The apparatus H consists essentially of two uprights or supports h¹ h² which
carry at their lower ends knives m m³ mounted on spindles o. As shown in Figure 1
the spindles are so arranged relative to one another that one knife m precedes the
other knife m¹. The knives m m³, as shown in Figure 2, are inclined away from
one another at the top so that the space between the two shaving knives is wider
at the top than at the bottom. The shaving remover or ejector s which is adjus-
ted by means of screws s¹ is mounted in such a way that it comes into action the
moment the material is grooved by the circular knife m¹. There is also a pair of
tongues n acting as guides to the shaving which remove to the outside the shaving
when released. The adjustment or movement forward of the material to be
grooved takes place by the rotation of a roller p.
A further advantage possessed by the present invention consists in that the
distance between the knives m m', Figure 2, may be mutually adjusted so that it
is possible to make grooves of different widths. For this object a screw r having
a right and left hand thread is provided, which screw is screwed into the up-
rights h h and by being turned may cause the uprights to be forced apart.
As both uprights are only held together at their upper ends by screws they have
a certain spring action and an adjustment of the knives is thus possible without
further trouble by revolving the screw r. The rotation of the screw r is effected
by means of a pin which may be easily inserted in a hole r¹. (Fig. 2.)
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. An improved apparatus for scoring or grooving cardboard and the like by
means of circular grooving knives, characterised by the knives being arranged in
such a mutually inclined position with a suitable advancement of one circular
knife in front of the other, that the space between the knives widens towards the
top and the shaving raised by the shaving ejector can slip off without choking
the apparatus, substantially as described.
2. In a device for scoring or grooving cardboard and the like such as described,
the employment of a right and left hand threaded screw in the knife-holding up-
rights or holders (h¹ h²) which are held together by means of screws at the top and
have a suitable spring action, with the object of enabling an adjustment of the
knives and thereby an increase in the width of the groove to be effected by the
rotation of said screw substantially as described.
Dated thin 4th daw of Nawamba. 1907
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Agents for the Applicant.