Improvements in Binding Strips for Securing the Corners of Paper and other Boxes.
Year: 1894

page_text: Date of Application, 9th Oct., 1894-Accepted, 10th Nov., 1894
COMPLETE SPECIFICATION.
Improvements in Binding Strips for Securing the Corners of Paper
and other Boxes.
I, ALBERT ALONZO WOOD, of 201 Jackson Street, in the City of Atlanta,
County of Fulton, and State of Georgia, United States of America, Mechanical
Engineer, do hereby declare the nature of this invention, and in what manner the
Bame is to be performed, to be particularly described and ascertained, in and by
the following statement :-
My invention relates to box corner binders for paper boxes and' is illustrated in
the accompanying drawing in which :
Figure 1 is a view of the side that becomes the inner side of the metal strip
when applied to the box.
Figure 2 is a view of the left hand edge of the strip, as shown in Figure 1.
Figure 3 is a view of the bottom end of the strip as shown in Figure 1, one
half of the figure being in section on the line 3, 3 Figure 1.
Figure 4 is a view of a portion of the side at one corner of a box, showing the
strip applied, and, by dotted lines, showing the spurs.
Figure 5 is a plan view of Figure 4, one side of the metal strip being in section
through one of the spurs, and the paper box being shown by dotted lines on one
side.
Figure 6 is a view partly in section, of a punch and die for forming the spurs
and cutting away the stock around the hole. The thin metal strip is shown by
broken lines, and the location of the point of the spur is indicated by x.
Figure 7 is a view of the face of the punch.
Figure 8 is a view of the face of the die.
Figure 9 is an enlarged view of the spur.
The last four figures are for the purpose of explaining a peculiarity of the
points of the spurs.
All of the figures are shown on a very much enlarged scale. In practice, the
width. of the strip shown is about nine-sixteenths of an inch. These box-corner-
binders are applied to boxes by being bent, as shown in Figures 4 and 5 over the
corners of paper-boxes, the spurs being clinched by an anvil placed in the inside
of the box.
Referring to Figures 1 to 5, A is a strip of thin metal from which points or
spurs a are punched, taking metal therefrom as shown by dotted lines at the top of
Figure 1, said spurs being bent up and inclined inwardly as shown in Figure 3,
and bent in cross-section, as best shown in Figure 1. The point should be
somewhat weaker, in proportion to width, than the other portions of the spur as
will be hereinafter explained. It is believed that the cross-sectional bend may be of
almost any form that will strengthen the spurs sufficiently to be driven through
the sides of a paper-box; it being essential, however, that the vicinity of the
point be weaker, to resist bending strain, applied at the point, than the rest of the
spur. In the preferred form shown, this weakness at the point is produced by
dies that contact with the spur only about as far as indicated by the ending of the
lines a', Figures 1 and 2. The points of said spurs are made weaker than the
other portions so that the first impact on the anvil in affixing will cause a quick,
sharp, inward bend of the spur after it passes through the paper, which, by
subsequent progression or roll, is caused to re-enter the paper on the inside of the
box. The small hooks or bends a' are made on the points of the spurs, as shown
in Figures 3 and 9, so as to cause the initial bend or roll to be easily started by
contact with the anvil, and to obviate all danger of backward roll of the spur.

page_text: The hooks a are produced by bevelling the point of the punch as shown at a², in
Figures 6 and 7, and the face a' on the punch, that prevents the pressing of the
spur near the points, prevents the straightening back of these small books.
Besides the stock required to make the spur, as shown by dotted lines in
Figure 1, the border-metal is cut away enlarging the hole, as shown in that figure,
because, if no stock is cut from the hole except the spur, said spur will shear the
paper in being bent down. It is for the purpose of obviating this that the stock
is cut away, and the paper may then be pressed into the hole in bending down the
spur, without being sheared, and then serves to assist the point of the spur in
preventing the disruption of the engagement by any force that would tend to slip
the paper off the spur, as might otherwise occur in case the paper B ended at the
dotted lines b, Figure 5. The necessity for this is more especially obvious, when
it is considered that sometimes the edges of the paper at the corners of the box
are not caused to contact by the operative before the strip is affixed by the machine.
As spurred strips have heretofore been employed, it has been absolutely necessary
that the operative place and hold the edges of the paper at the corner of the box
in contact, which obviously consumes time of both operative and machinery, and
so lessens the output of boxes and increases the cost.
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. A binder-strip consisting of a strip of thin metal, having spurs punched and
bent up therefrom, the holo wherefrom said spurs are punched being enlarged,
Bubstantially as and for the purpose specified.
2nd. A binder-strip consisting of a strip of thin metal having spurs punched and
bent up therefrom, and small hooks on the points of said spurs, substantially as
specified.
3rd. A. binder-strip consisting of a thin metal strip, having spurs punched and
bent up along its edges, said spurs being strengthened by lateral bending extending
from the base nearly to the point and being left approximately flat on the point,
substantially as and for the purpose specified.
Dated this 9th day of October 1894.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.