Improved Binding Strip or Device for Connecting and Strengthening the Corners of Cardboard or the like Boxes.
Year: 1891

page_text: Date of Application, 16th May, 1891-Accepted, 12th Sept., 1891
COMPLETE SPECIFICATION.
Improved Binding Strip or Device for Connecting and Strengthening
the Corners of Cardboard or the like Boxes.
We MAX SCHUBERT of 47 Sprembergerstrasse and HUGO SCHWOCHE of
1 Konigsplatz both in Cottbus in the Empire of Germany Merchants 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 binding strip or device provided according to this invention and hereinafter
fully described has for its characteristic feature that the metal strip forming the
binding is furnished with ends formed in such a manner that they can be pressed
into the corners of the cardboard box so as to partly enter the material of the box
and to be extended within the inner layer of the same thus forming an automatic
and firm binding when the corner strips are driven in.
The invention is illustrated in the accompanying drawings in which
Figure 1 shows the form of the strip with flat and extended ends i.e. before they
are bent over.
Figure 2 shows the same form as Figure 1 with this difference that the ends of
the strip are bent over.
Figure 3 is a view of the strip shown in Figure 2 before being driven in the
cardboard or pulp.
Figure 4 shows a cross section of the same after being driven in.
Figures 5 and 6 show a modification of this invention in such a manner that
instead of swallow or dove tail shaped ends the strip is furnished with triangular
ends.
Figure 6 shows a strip according to Figure 5 after the edges or ends are hent.
Figure 7 is a cross section of a cardboard box binding when the strips of
Figures 1 to 4 are used.
Figure 8 is a cross section of a cardboard box binding when the strips are made
according to Figures 5 and 6.
The cardboard box binding is made according to this invention of a single sheet
metal strip a which is furnished on each side in the scuse of its width with a series
of projections b. The latter have a dove tail shape (Figures 1 to 4) or a triangular
shape (Figures 5 and 6) and they are in the latter case partly separated from the
strips a by notches 2 formed on their wide side. These respective ends or b¹ of
the strips are semi-circularly bent up upon a correspondingly curved matrix and
thus assume the shape shown in Figures 2 and 5 respectively.
When such prepared strips are used to connect the edges or corners of cardboard
boxes they are laid upon these corners in a longitudinal direction and subjected to
a suitable amount of pressure which squeezes the strips against the corners of the
cardboard box. The curved ends & form now knives the points or sharp edges of
which are pressed into the material this pressure being applied sidewise and on
both sides. By now increasing the pressure exerted against the metal strips its
ends will be pressed flat at their points owing to the resistance of the cardboard so
that the convexities will be extended and the points will be firmly inserted in the
material and held by the upper layer thereof. The ends b now assume the shape
shown in Figures 4 and 7, and the ends that shown in Figures 5 and 6 and the
latter enter the substance of the corners of the box in the manner shown in
Figure 8. In this manner a firm binding of the abutting material is obtained at
the corners this connection being only severed when the ends which enter the
material are destroyed or the cardboard is torn with force.

page_text: Such a cardboard box corner binding strip has the advantage 'that the connection
of the corners can be obtained by a single stamping operation.
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
-
A binding device for connecting the corners of cardboard boxes consisting of a
sheet metal strip the ends of which have either a dovetail or a triangular shape in
such a manner that the points of the dove tail ends or of the partly notched
triangular, ends are circularly curved and when the short metal strip is pressed
around the corner of the cardboard box so as to enter the material and an increased
pressure is applied upon the metal strip the points. of the dove tail or triangular
ends are extended between the layers of cardboard and the convexity of the
dove tail or triangular ends is flattened, whereby the points are surrounded on both
sides by the material while firmly, holding the same substantially in the manner and
for the purposes herein before described. and illustrated in the drawings hereunto
annexed.
Dated this "Ifth dow af Mox 1901
TONGUE & BIRKBECK,
34; Southampton Buildings, Chancery Lane, London, W.C.,
Agents for the Patentees.