Improvements in Machines for Closing the Corners of Cardboard or other Boxes.
Year: 1895

page_text: Date of Application, 16th May, 1895-Accepted, 27th July, 1895
COMPLETE SPECIFICATION.
Improvements in Machines for Closing the Corners of Cardboard
or other Boxes.
We, FRIEDRICH CARL BRAUER, FRIEDRICH PAUL BRAUER, both Manufac-
turers of Mühlenstrasse 7, and HERMANN HUGO GRÜNER, Merchant of
Annenstrasse 26, all of Chemnitz, Saxony in the Empire of Germany do hereby
declare the nature of our invention and in what manner the same is performed
to be particularly described and ascertained in and by the following statement :-
The object of the present invention is to provide a machine for automatically
applying strips of gummed or otherwise prépared material to the corners of
cardboard and other boxes in order to close the same, and the invention consists in
the combination of parts as herein after described and pointed out particularly in
the claims.
And in order to render the present Specification more easily intelligible reference
is had to the accompanying drawings in which similar letters denote similar parts
throughout the several views:―
Fig. 1 being a side elevation of the machine,
Fig. 2 a detail view of the moistening roll driving mechanism,
Fig. 3 a detached side elevation of the mechanism for placing the cut off
prepared strip onto the corner of the box (seen from the opposite side to that of
Figure 1).
Fig. 4 a detail elevation of the cutter for detaching lengths of the prepared
strip and
Figs. 5 and 6 detail end and side elevations of the slide for advancing the lengths
of the prepared strip.
Referring to Figures 1, 5 and 6:-The strip of prepared paper, linen or other
suitable material is fed from a suitable roll (not shown) along the top of the
connecting rod b' which connects a sliding block b, adapted to slide horizontally in
guides ii, to a lever 62 pivoted to the machine frame at 63 and operated by a pin b
of the cam arm G. The latter is pivoted to the machine frame at one end and
raised by a treadle and by means of the connecting rod h', being returned to its
lower position by. a spring h². The lower arm of the lever 62 is curved so that
when the cam arm G is lowered the pin will push the rod to the right in
Figure 1. The sliding block b is provided at the top with a spring clamp c
adapted at the forward movement of the said block (to the right in Fig. 1) to close
onto the block and clamp the strip of prepared or adhesive material which is to be
applied to the corners of the box. The clamp c has a spring hinge cl (Fig. 5) at one
side and an arresting spring d with stops e at the opposite side thereof, and the
guides i have a stop g g' adjustable along their length, so that the way travelled by
the block at each stroke may be varied at will by altering the position of the
said stop.
The arm g of the stop contacts with the arresting spring e when.
the block arrives at this end of the guides, pushing the same back and allowing
the spring clamp to close, onto the strip of adhesive material. After the block
has carried the length of strip to the other end of the guides i (right hand end
in Figure 1) an arm f¹ on a block f (Figs. 1 and 6) lifts the clamp c and
simultaneously pushes back the spring e, which when the block again retires,
springs under the clamp c and keeps the same open for the backward stroke of
the block, thus preventing the strip from being pushed back or broken through

page_text: at the said backward movement: At the end of the guides in the strip is
grasped by a moistening roll D and a counter pressure roll E; both of which
are positively driven, said rolls being held in suitable contact one with the other
by means of springs E2 (Fig. 2) which press the axle of the upper roll E down onto
the lower roll D. Two springs E2 are arranged one at each end of the roll
axle and one (shown at Fig: 2) of these springs is pivotally attached at E³ so that
the same may be thrown round to enable an easy and convenient detachment
of the rolls from their bearings. The lower roll D runs in a trough of water
and is provided with a scraper D₁ to remove any adhesive which may stick to
the same; and with brushes FF arranged in the water of the trough to clean
said roll. The main object of the scraper D' is to prevent the adhesive strip
sticking to and being taken round the roll. The rolls D and E are connected
together by gearing wheels D' and E' (Fig. 2) and are both driven from the
spindler of the lower roll. As shown at Figure 3 the spindler carries a loose
pinions which engages a rack s which is reciprocated with and by the block b,
and fast on the loose pinion s is a disc 2 carrying a ratchet which engages
at the forward stroke of the slide 6 with the teeth of a ratchet wheel t fast on
the spindle
r of the lower roll D. Thus it will be obvious that at the forward
stroke of the slide the rolls D and E will also be rotated to pass the strip being
fed to them by the slide, on towards the press A.
Between the rolls D and E and the strip guiding mechanism B is arranged the
cutter (Figs. 1 and 4) which severs the length of prepared material from the
band. This cutter consists of a moveable jaw k and a lower fixed jaw k¹,
the latter being supported on a suitable block m of the machine frame. When
the length of material has been sufficiently advanced so that it is lying on the
guides oo of the guide plate B (these guides are shown in end view detached at
the lower part of Fig. 3) the moveable jaw k of the cutters is depressed and cuts
the end off. The mechanism for depressing the said jaw k consists of an arm k²
pivoted to the end of a lever n which is in its turn pivoted in the machine frame
and reciprocated by means of a slot of the cam arm G so as to raise and lower
the vertical arm which bears on the moveable jaw of the cutter as shown at
Figure 1. The moveable cutter jaw k is normally retained in its upper or
inoperative position by means of a spring and is pushed down by the arm k² to
cut off the length of strip after which the said arm is removed from contact with
the cutter jawk, by reason of its cam surface * coming into contact with a roll i
on the machine frame and throwing the lower part of the arm off the upper edge
of the cutter jaw so that the latter is free to open by reason of its spring k as soon
as the length of material has been severed.
The severed length now lies on the two edges o o of the guide frame B and is in
position to be lowered onto the corner of the card box, which is supported on the
table C of the machine in place under the guide B and stamp A.
The toothed jaw (Fig. 4) is moveable with the jaw k of the cutters and serves to
loosen the severed piece from the strip and from the cutters. The guide B slides
vertically in a dovetail groove of the machine head H (best seen from the opposite:
side elevation shown at Figure 3) and is normally held in its upper position, viz.
the position in which it receives the strip, by means of a spring B³. It is actuated
downwards by means of a pusher block B2 contacting with a nose B³ fast on the
upper part of the guide shank. The pusher block B is attached to the end of the
lever A' so as to have a slight play or swinging movement in a plane at right
angles to the plane of the lever A1 but to have no such movement in the plate of
the said lever. Thus it will be seen that the said block on dèsèending will have a
circular movement or will move in the line of an arc, as shown by an arrow at
Fig. 3, on descending. This will cause it to slide to the right of the nose or
bracket B and contact with a cam surface p fast on the machine frame, which
pushes it off the said bracket and allows the guide frame to rise under influence of
its spring B. The guide B is allowed to rise just as the stamp A commences its*
downward movement thus leaving the strip deposited on the box corner or along

page_text: the same to be pressed fast on the box by the said stamp A. The downward
movement of the latter is also effected by the lever arm A, which is pivoted to the
machine frame and operated by the same lever as the arm n. The shank A³ of
the stamp A slides vertically in the machine head H but with lateral play as
indicated by dotted lines in Figure 1, being normally held against the right hand
side of its guide slot by a spring A³, and actuated towards the left hand side on its
descent by a pin fast on the said shank A³ coming into contact with a cam surface A*
of the machine head H of the machine. The connection of the shank A³ of the
stamp, to the end of the lever A' is also arranged so as to allow of this lateral
play. The object of this lateral play is to allow the stamp to be moved close onto
the cutters at its downward movement and so operated to press the whole length of
the strip onto the corner of the box. At its upward stroke the stamp will be kept
with its pin against the cam A* by the spring A².
From the foregoing description it will be evident, that the clamp c of the block b
seizes the strip, pushing the same forwards and simultaneously driving the
moistening roll D and its counterpressure roll E to act to pull the strip and pass it
through the cutter jaws onto the guide ledges oo of the guide B; the cutters then
descend and sever the length from the main body of the adhesive material, the
guide B lowers the length thus severed and moistened onto the corner of the box,
which has been previously laid on the machine table C and the stamp A then
presses the said strip of adhesive material onto the box corner, securely fastening
the same.
During these latter operations the moveable jaw of the cutter has been
allowed to return to its upper position and the block b has been returned to its
initial position after the clamp c has been opened. The table C is adjustable and
may be used for long and short boxes, the same as also the stamp A is interchangeable
and may be changed to work round or oval boxes.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is performed we declare that what
claim is :-
we
1. In a machine for attaching the corners of cardboard and other boxes, the
arrangement of a laterally moveable stamp A and means for moving the same
laterally at its descent so as to press properly on the whole length of the severed
strip of adhesive material substantially as described.
2. The arrangement of the guide B, which is adapted to deposit the severed strip
in position on the box corner substantially as described.
3. The device for releasing the moveable cutter jaw immediately after it has
severed the strip end to enable the severed portion to be fed to the guide B
substantially as described.
4. The arrangement of the adjustable table C so that the same as also the
stamp A may be interchanged substantially as described.
Dated this 16th day of May 1895
HASELTINE, LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicants.