New or Improved Apparatus for Creasing Pasteboards and the like to Facilitate Bending them.
Year: 1899

page_text: Date of Application, 11th Aug.,
1899
·
Complete Specification Left, 27th Apr., 1900-Accepted, 11th Aug., 1900
Date of Application, 11th Aug., 1899
Complete Specification Left, 27th Apr., 1900—Accepted, 11th Aug., 1900
PROVISIONAL SPECIFICATION.
New or Improved Apparatus for Creasing Pasteboards and the like
to Facilitate Bending them.
I, ALBERT WEUSTER, of 15 G. Broad Street, Station Dwellings, London, in
the County of London, Engineer, do hereby declare the nature of this invention
to be as follows;-
This invention relates to a new or improved apparatus for creasing paste-
boards and the like in such manner that the material so treated can afterwards
easily be bent to any desired angle along the line of the crease, without previously
notching or scratching it on the outside, or grooving it, on the inside of the
angle and thus impairing its strength as has hitherto been found necessary
when a sharp bending is required as for instance in the manufacture of paste-
board or cardboard boxes and for similar purposes..
The object of the invention is to form by the operation of simply and strongly
made apparatus a ridge along the line where the material is to be bent, said
ridge to lie along the inner point of the angle to be bent leaving the outward
edge undamaged and thereby increasing the strength of the boxes.
The apparatus consists of several parts constructed and arranged in such
manner that, upon being operated by any convenient power, they will act con-
jointly with precision and effect their purpose neatly and uniformly and accord-
ing to their adjustment.
A table of suitable length having a longitudinal aperture of convenient width
in its centre is secured to strong support to which at each of the short sides
of the table a pair of brackets is affixed at a given distance from each other.
These brackets have bearings for the reception of pivot pins or studs projecting
laterally and in a horizontal direction from the sides of two peculiarly shaped
and sectioned plates or rails which can thus be made to oscillate on said pivots.
The sectional configuration of aforesaid plates or rails is that of a double armed
lever and they are so located that they can move towards and from each other.
At their lower end suitable projections are provided admitting of the plates
being connected by a series of strong spiral springs which have the tendency
of drawing the lower portions of the plates together, the extent of the effect of
said springs being determined by a suitably contrived and fixed adjustable stop
block or rail which can be raised and lowered between the lower portions of the
lever sectioned plates or rails so as to limit the contraction of the springs as
required.
The upper portion of the plates or rails is formed into a sharp edge running
along the full length of the rails at convenient distance above the pivots, said
edges being placed in the same plane at convenient distance from each other and
protruding through the described longitudinal aperture in the table. At both
ends of the plates there are provided at right angles to the upper surface of the
aforesaid sharp edge upwardly extending guide pieces of circular or other suit-

page_text: able sectional form to fit the bores of bosses at both ends of two rails which are
adapted to be moved up and down on said guide pieces by means of suitable
gear hereinafter described, and the edge of which formed by their front and bottom
surfaces coincide with the sharp edge of the bottom rail protruding through the
table.
On the outside of the bosses of the upper displaceable rails there are studs for
holding the upper ends of connecting rods, the lower ends of the latter being
moveably joined in the head of a rod extending downwards and secured to
the straps of eccentric discs mounted on a common shaft which can be revolved
by foot or other convenient power, the aforesaid system of rods is provided at
both sides of the apparatus and both systems act simultaneously.
The operation of the machine is as follows: -
The pasteboard is placed over the longitudinal aperture in the table and
passed under the raised displaceable rails where the sharp edges of the lower
lever plates will slightly bend it upwards. Upon the upper moveable rails
being pulled down by the action of the eccentrics, they will firmly grip the
pasteboard, and upon continuing the pull of the eccentrics the sharp edges
of the lever plates together with their moveable rails will be approached to
each other, forcing the material between the edges to bend in an upward direc-
tion, and by sharp pressure forming it into a ridge as mentioned in the preamble.
The pull of the eccentrics being discontinued the connecting rods will raise the
moveable rails, and the spiral springs will be free to return the apparatus to
its inactive condition, so that the ridged pasteboard can be removed and the
operation be repeated.
By adjusting the described stop block or rail and by providing and adjusting
suitable attachments to the connecting rods, the apparatus can be adapted for
treating material of different thickness and strength.
New or Improved Apparatus for Creasing Pasteboards and the like
to Facilitate Bending them.
I, ALBERT WEUSTER, Engineer, 15 G. Broad Street Station Dwellings,
London, E.C., 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 present invention relates to a machine for creasing cardboard and the
like by means of four co-operating bending plates or parts. The new machine
differs essentially from that covered by German Patent No. 75864 and United
States Patent No. 235821 in that the work, before the actual bending begins
is slightly bent upwards in consequence of which the bending must take place
in an upward direction, while on the other hand cleanly bent edges are obtained.
Material thus creased may afterwards be bent to any required angle without
breaking. The articles produced by means of this machine, such as cardboard
boxes and the like, are therefore much stronger at their bent edges than similar
articles produced with grooved or cut edges.
A machine according to this invention is represented in the accompanying
drawing;

page_text: Figure 1 being a side view in which the different parts are represented as
occupying the middle position of the operation.
Figure 2 is a similar view indicating the position at the end of the operation,
and
Figure 3 is a partial front view of the apparatus with the parts occupying the
position corresponding to Figure 1.
G
The lever plates a forming the lower pair of bending plates are provided on
both sides with trunnions by means of which they are mounted in bearings
in the frame of the machine, in such a manner that their sharp upper edges
are at an even distance from each other along their whole length. The lower
parts of the lever plates a are provided with arms or extensions & between which
spiral springs e are so arranged that the plates are normally held in a certain
Position relatively to each other, which position, according to the thickness of
the material to be treated, is regulated in a suitable manner by means of an
adjustable rail or distance piece f. The work table c of the machine is pro-
vided with a longitudinal slot, through which the upper ends of the bending
plates a, a, penetrate. Above the plates aa are arranged guide pins h directed
upwards at right angles to the inclined top surfaces of the ends on which
guides are displacably arranged, longitudinal plates i one on either side forming
the second co-operating pair of plates provided with suitable strengthening
means. These plates are provided at their ends with horizontal bolts or studs k
projecting outwards on which are articulated rods m connected at n with an
operating lever o. This lever system l, m, n, o, is arranged at each end of the
machine, both the systems being simultaneously worked by means of an eccentric
or the like keyed on a longitudinal shaft in such a manner that the second
pair of plates i are alternately raised and lowered on their pins h.
The operation of the machine is as follows:
The work p is introduced between the top of the table g and the upper plates i
(Figure 3) the parts having been brought to their initial position by the spiral
springs e, in which position the plates are at their highest position.
If now a downward pull is applied to the lever device l, m, n, o, the upper
plates will first press down against the work in such a manner that it is
held against the top edges of the lower plates a, the work thus being wedged
between the upper and lower plates i and a, in consequence of which that part
of the work between the upper plates i is slightly bent upwards, (Figure 1) an
operation which is facilitated by the roof like inclination of the lower plates a.
As the parts descend further the lower plates a a swing round their pivots b,
at the same time expanding the springs e. The top ends of the upper plates i
move towards each other until they occupy a vertical position, in consequence
of which the part of the work which first had remained free between the upper
plates, and then slightly bent upwards, is bent into the position as repre-
sented in Figure 2.
The work thus prepared can be bent along the place thus treated by the
machine, to any angle without breaking or tearing, the outside of the bent edges
prepared by the machine in the above described manner being perfectly smooth
and free from irregularities.
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. A machine for creasing cardboard and the like by means of four plates
the upper pair of which presses the work introduced between the two pairs of
plates downwards against the lower pair having upwardly and inwardly inclined
tops so that the portion of the work remaining free between the four plates
is first slightly bent upwards and then fully bent, substantially as described.
2. Apparatus for creasing cardboard and the like comprising a pair of upper
plates, as i, a pair of lower plates as a, and means for moving the upper plates
s

page_text: downwards and inwards and for moving the upper ends of the lower plates
towards each other, substantially as described.
3. The complete machine for creasing cardboard and the like substantially as
described or illustrated in the accompanying drawings.
Dated this 27th day of April 1900.
BOULT, WADE & KILBURN,
Agents for the Applicant.