Improvements in or applicable to Machines used in Applying Strips of Paper or Cloth to Boxes of Cardboard and the like.
Year: 1896

page_text: Date of Application, 4th Jan., 1996-Accepted, 8th Feb., 1896
COMPLETE SPECIFICATION.
Improvements in or applicable to Machines used in Applying Strips
of Paper or Cloth to Boxes of Cardboard and the like.
We BRUNO RÖMER, Machine Maker and ROBERT PORSTMANN, Merchant,
both of Siegmar, Saxony, Germany, 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 :-
Our said invention relates to improvements in machines or appliances used for
applying strips of paper to boxes or box lids made of cardboard or the like
materials.
In order that our said invention may be more clearly understood we will
describe the same with reference to the accompanying sheet of drawings.
In such machines as hitherto constructed the strip of paper or cloth destined to
form or to be applied to the box is passed in a flat or open state through a pair of
feed rolls but owing to the slight rigidity of the strip it sinks as shown in Fig. 8
when its lower or pasted surface is liable to stick to the guides or to the corner of
the box and thus to prevent the forward feed.
According to our said invention we remove this defect by imparting to the strip
the necessary rigidity to enable it to overcome the tendency to sink. This we
accomplish by bending or folding the strip (as shown for example in Fig. 7) before
applying the paste, with the result that notwithstanding the moistening the rigidity
of the strip is such that it remains straight throughout a sufficient length.
The machine is arranged or constructed in the following manner.
The strip is wound in a flat state on a roller a Fig. 1 whence it runs to the
folding apparatus in passing through which the strip is bent angularly or round
and thereby acquires greater resistance to deflection.
The details of the folding apparatus are shown in Figs. 4 and 5. The strip
passes through a semicircular funnel & terminating in a slot. In front of the slot
are two rollers 13. The strip is thus folded or partly broken in half and adapted
for use on boxes with sharp corners for which the folding in half particularly fits
it inasmuch as the corners are thereby rendered clean and sharp and the strip does
not get crooked on the corners. Further the effect of the partial breaking of the
strip is that the strip gets a set which causes it to tend to assume the folded shape
and not to spring away from the corner as is usually the case when the strip is
pasted flat.
For round boxes or boxes with rounded corners the folding appliance may take the
form of a tube as shown at in Fig. 6. The feed end may in this case be shaped
as shown in profile at be and the delivery end as shown at . Other suitable shapes
may be adopted for the delivery end of the tube & according to the shape of the
object to which the strip is to be applied.
The folding device is usually applied in or to the pasting machine itself but
the strips may nevertheless be drawn through the folding device placed outside the
machine.
Behind the folding device b (Fig. 1) is placed the feeding apparatus consisting
of two rolls d. If the strip is intended for use in a partly doubled state for a box
with sharp corners the contact surfaces of the feed rolls c d are angular in cross
section (see Fig. 9). If on the other hand the strip is for a round box or a box
with rounded corners the profiles of the rollers c d are modified accordingly. The

page_text: lower roll d runs in a receptacle e containing a suitable adhesive preparation or
water as the case may require.
The strip is pushed by the feed rolls through an aperture in the part (of a
shape corresponding to the part of the box to which the strip is to be applied) and
under the die g. Owing to the rigidity imparted by the folding operation the strip
does not deviate from its horizontal position and may be pushed forward with
accuracy aud certainty.
The descending die g which presses the strip on the box at the same time cuts
off the required length from the continuous strip. To effect this the die works
quite close to the part so that the die y and the part together form a guillotine
or shears.
The boxes y which are operated on are placed on a support or table m (Fig. 2)
the upper part of which has the same profile as the corner or other part of the box
resting thereon. The table m is longitudinally adjustable in order to take boxes
of different depths. In order that the length of strip to be used may be varied to
correspond the feed rollers are driven in the following manner.
The shaft d' of the lower feed roll carries a ratchet wheel d² (Fig. 9) with
which engages a pawl (Fig. 10) mounted on a spur wheel d³ which is free to
revolve about the ratchet wheel d so that if the wheel is caused to rotate
backwards and forwards the shaft d is only taken in one direction.
Gearing with the wheel 3 is an oscillating toothed sector p Fig. 3 connected by
the arm with an adjustable fork a¹ into which takes a stud n on the arm /³ of a
three armed lever. According to the position of the fork (which can be
accurately set by means of an index) the arm pland with it the toothed sector p
oscillates through a greater or less angle. The lever which operates the die g is
driven by the three armed lever (having its fulcrum at k) by means of a
roller mounted on the lever h taking into a slot in the arm k².
On the
To the arm is attached a rod which is connected at its lower end to a
treadle. On the descent of the latter the lever
turns to the left the toothed
sector and thereby feed rolls are first actuated so as to push the strip forward.
Then the die g descends cutting off the strip and pressing it on to the box.
release of the treadle the resilience of the spring brings back the lever kk ka
with it the lever h while the die rises and at the same time the sector p goes back
to its first position without turning the feed rolls.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is.
1. A machine for applying strips to boxes substantially as set forth and shown.
2. The process of folding or bending lengthwise a strip of material for use in
box making substantially as and for the purpose set forth.
3. The hereinbefore described device for bending or folding longitudinally a strip
of material for box making substantially as and for the purpose set forth.
4. In a box making machine the combination of strip folding or bending devices
such as shown in Figs. 4, 5, or 6 with feed rolls whose contours correspond to the
bent strip a fixed guiding and cutting part and a die y working in close contiguity
to the part so as to form a guillotine or shears substantially as and for the
purpose set forth and shown.
Dated this 2nd day of January 1896.
E. T. WHITELOW, A.M. Inst. C.E.,
70 Deansgate, Manchester, Agent for the Applicants.