Improved Method of and Means for the Production of Grooves in Cardboards or other similar Material.
Year: 1893

page_text: Date of Application, 8th Aug., 1893
Complete Specification Left, 8th Mar., 1894-Accepted, 12th May, 1894
PROVISIONAL SPECIFICATION.
Improved Method of and Means for the Production of Grooves in
Cardboards or other similar Material.
I, JEAN SCHERBEL, of 65 äussere Schillerstrasse, Dresden N., in the Kingdom
of Saxony, German Empire, Manufacturer do hereby declare the nature of my
invention to be as follows:-
My invention relates to the treatment of cardboards or other similar material to
facilitate the bending of the cardboard. Up to the present in order to allow of the
bending of cardboard it has been usual to cut or stamp grooves into the body of
the material. However the cutting of grooves is very disadvantageous in thin
cardboard or cardboards of low quality because the cardboard is weakened just at
those parts where it is most exposed to wear & tear, while the stamping of the
grooves into the cardboard only slightly assists the bending thereof.
My invention consists in the method of and means for the production of corners
in cardboard, hereinafter more fully described by the upsetting of the card and the
formation of a groove thereby at the position where the bend is to be disposed.
This method has the additional advantage that the cardboard becomes denser and
stronger at the portion of the groove where it is most exposed.
The main features of the method and machine by means of which I achieve the
above result are as follows:-
.
The cardboard is gripped in a flat condition by two pairs of gripping cheeks or
dies, these gripping cheeks are adapted to tighten upon and loosen from the card-
board automatically and simultaneously by any suitable mechanism. One pair of
the cheeks or dies is adapted to moove towards the other pair of cheeks or dies in
a plane parallel to that of the cardboard. When the gripping cheeks first grip the
cardboard, the two pair of cheeks are a small distance apart from one another, they
are then moved toward one another, with the result that the cardboard is upset and
a groove is formed in it by the material being forced up into a bevelled recess
formed in the upper of each of the pair of cheeks or dies, the gripping cheeks are
then released and the cardboard removed the lateral movement of the cheeks or
dies relative to one another is preferably arranged to be automatically effected by
the other parts of the machine, by any suitable arrangement of mechanism.
Dated this 8th day of August 1893.
FELL & WILDING,
1, Queen Victoria Street, London, E.C., Agents for the Applicant.
COMPLETE SPECIFICATION.
Improved Method of and Means for the Production of Grooves in
Cardboards or other similar Material.
I, JEAN SCHERBEL, of 65 äussere Schillerstrasse, Dresden, N., in the Kingdom
of Saxony, German Empire, Manufacturer, 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 :-
My invention relates to the treatment of cardboards or other similar material, to
facilitate the bending of the cardboard. Whereas up to the present in order to
allow of the bending of cardboard, it has been usual to cut or stamp grooves in the
body of the material. However the cutting of grooves is very disadvantageous in

page_text: thin cardboards, or cardboards of low quality, because the cardboard is weakened
just at those parts where it is most exposed to wear and tear, while the stamping of
the grooves into the cardboard only slightly assists the bending thereof.
Now my invention consists in the method of, and means for, the production of
corners in cardboard, hereinafter more fully described, by the buckling of the card,
by end compression, and the formation of a groove thereby at the position where
the bend is to be disposed. It is intended that the cardboard shall be bent over in
such a manner that the ridge of the groove shall come outwards, and thus form the
edge of the finished box.
In order that my invention may be the better understood, I now proceed to
describe the same, reference being had to the accompanying drawings, and to the
letters and figures marked thereon. Like letters refer to like parts in the various
figures.
Figures 1 and 2 are diagrammatic sectional views of the tools used in carrying
out my method; Figure 1 showing the position which the tools occupy at the
beginning of the operation; and Figure 2 showing the position which the tools
occupy after the completion of the operation.
Figure 3 is a sectional view of the card board after the groove has been
formed.
Figures 4 and 5 are a side elevation and plan, respectively, of the mechanism
designed to operate the tools.
The tools for forming the grooves consist of two cheeks a a', one of which is
fixed to the working table P of the machine, and the other to a plate P' movable
on the working table. The two cheeks a a¹ serve as supports to the card board
to be handled. Above the same are arranged two pressing tools 6 b¹ carried in
cast iron beams stretching across the working table. The pressing tool b', situated
over the movable cheek a', is movable vertically and horizontally, while the
pressing tool 6 situated over the fixed cheek a is only movable vertically.
The lower opposite and inside edges of the pressing tools 6 bare bevilled.
The card board is placed over the two cheeks a and a¹ so that the place where the
card board is to be grooved is between the cheeks.
At the commencement of the operation the opposite faces of the cheeks a 'a',
and of the tools 6b, are apart from each other an equal distance 1, while the
inner lower edges of the pressing tools 66' are apart from each other the larger
distance l'.
The buckling operation commences by the two pressing tools. 6 and 61 being
lowered with considerable force on to the card board T, and gripping the latter
at those parts where it rests upon the cheeks a a¹.
The cheek a¹ and the pressing tool are then moved simultaneously against
the cheek a, and the pressing tool b, respectively. The strip of card board,
between the cheeks a a' and the pressing tools 6 b', is thus forced upwards as the
spaces and decrease, according to the advance of the cheek a¹ and the tool b¹,
the amount to which the card board can be forced up being limited by the
bevilled edges of the pressing tools.
The card board can only be forced upwards, not downwards, because on its
upper side the free space is larger than the free space at the lower side. The
card board at that point is formed into a groove, the transverse section of which
is controlled by the bevil of the edges of the pressing tools.
In order to ensure that the card board is held securely between the cheeks and
the pressing tools, it is advisable to provide the gripping faces with serrations.
According to Figure 4 the working table P is fixed to the frame G of the
machine, and over it is placed the movable plate P¹. The beams C C' with the
pressing tools b 6' are carried by jointed levers E E. The lever carrying
the beam C, with the tool b, is attached to the fixed table, while the lever carrying
the beam with the tool b¹ is attached to the movable plate P. With the
levers E E engage draw-bars F F¹, connected with each other at their lower
ends by a transverse piece or crosshead Q with which engages a third draw bar S,

page_text: which is adjustable as to its length by a screw thread and nuts. The lower end
of the draw-bar S, engages with a lever H, attached to the frame of the machine
and held by a spring U, also attached to the frame of the machine. To the
movable plate Pris attached a rocking lever V, the lower end of which is con-
nected by means of a rivetted hook to a spiral spring R, also attached to the
frame of the machine. The spiral spring R has a tendency to keep the plate P'
in that position in which the above mentioned space is maintained between the
checks a a', and the pressing tools b b¹.
If the machine is in operation, and its driving shaft W rotates to the right, a
cam piece O' of the disc O, fixed to the shaft, touches the lever H and depresses
it, whereby the beams C C and the pressing tools 66' are pressed down upon the
card-board by means of the said draw bars S, F F', and the crosshead Q.
During the continued rotation of the shaft W the cam piece O¹ touches also
the lower end of the lever V and effects a thrust of the same, pushing the movable.
plate P, and with it the cheek a¹, beam C', and pressing tool 6', against the fixed
plate P, cheek a, beam C, and pressing tool b, thus forming the groove as before
described.
When at the further rotation of the shaft W, the cam O leaves the lever H
and afterwards also the lever V, the whole mechanism is returned into its original
position by means of the springs R and U.
Any known disengaging mechanism may then be used to throw the operating.
shaft out of gear, and the operator can move the card-board, and form another
groove at another place by a repetition of the operation after throwing the
operating shaft once more into gear.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
1st. The process of producing grooves in cardboard by the buckling of the
material by end compression, the cardboard being gripped between cheeks a a¹
and pressing tools bb bevelled at their lower inner edges, of which the cheek a¹
is movable horizontally, the pressing tool b¹ vertically and horizontally, and the
pressing tool b only vertically; the cheek a¹ and the pressing tool b¹ being then
simultaneously moved against the other cheek and pressing tool, whereby the
cardboard which is free between the cheeks and pressing tools is bent and buckled
to an extent limited by the aforesaid bevil.
2nd. For carrying out the buckling process by end compression as claimed in.
Claim 1, an apparatus consisting of a fixed table P, with cheek a and a beam C
(binged to the table P) with pressing tools b; further of a plate P¹ (movable on
the table P) with cheek a', and a beam C¹, (hinged to P'), with pressing tools 6' ;.
the beams CC¹ being connected to the draw bars F F, and a rod S, connected
to these; the draw bars F F', lowering the beams C C¹, and with them the
pressing tools bb' to the cheeks a a'; while the table P' and with it the cheek a¹,.
beam C and pressing tool 6' is pressed against the table P with cheek a, beam C
and pressing tool b.
3rd. In combination with an apparatus as claimed in Claim 2, a lever H, (with
which engages the before claimed rod S) and an axle W, with a cam O O¹, which
at the rotation of the axle-first presses down the lever H¹ and then, while
keeping the same in its lowest position, effects a thrust of the lever V hinged
to P, whereupon the levers H and V, at the further rotation of the axle W, are-
returned into their former position by the springs U and R.
Dated this 8th day of March 1894.
FELL & WILDING,
1, Queen Victoria Street, London, E.C., Agents for the Applicant.