Improvements in Paper Boxes.
Year: 1897

page_text: Date of Application, 4th May, 1897-Accepted, 5th June, 1897
Improvements in Paper Boxes.
I, ROBERT PITFIELD BROWN, of 3412 North Nineteenth Street, Philadelphia, in
the County of Philadelphia, in the State of Pennsylvania, United States of America,
Paper Box 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 construction of paper boxes, of the kind known as
knock-down boxes, and has for its object to provide a box of this kind at once simple
and of great strength and rigidity. The nature of my improvements will be best
understood as described in connection with the drawings in which they are illustrated,
and in which,
Figure 1 is a plan view of the blank cut and scored ready to be erected into
a box.
Figure 2 is a perspective view illustrating the operation of erecting the box from
the blank, and
Figure 3 is a perspective view of the box fully erected.
A indicates the bottom of the box, B B the side wall flaps, from the ends of which
extend flaps C C. DD are the end wall flaps, from the front edges of which
extend the flaps E E, provided with projecting flaps or ears E' E'. I make these
projecting flaps E' with inwardly projecting corners E³, as'shown, this construction
providing for a more rigid interlocking of the flaps E' and C.
In each of the flaps U projecting from the ends of the side walls BBI form an
oblique slot, indicated at C, the oblique slots being formed as shown so that they
extend inward and outward from the corner of the box when the walls and flaps are
folded to position. Moreover, the position and length of the slot C must be such as
will permit of the introduction of the inner corners of the flaps E when the box is
folded, and, as indicated, the bottom, indicated at E3, of the flaps E should come in
contact, or substantially so, with the bottom, indicated at C³, of the slot in which
the end flap is engaged, while the inner side, indicated at E3, of the flaps El should
come in contact, or substantially so, with the top, indicated at C2, of the slots C'.
The portion indicated at E underlies the top edge of the slots C" and affords a
greater security against the slipping out of the flaps E from their engagement with
the flaps C.
The box is erected by folding up the side walls B B and folding in the end flaps C,
as indicated at the right hand of fig., then the end walls Dare folded up against
the outer faces of the flaps C and the flaps E are folded down against the inner faces
of the flaps C, the corners E of the projecting flaps E being tucked into the
slots C of the flaps C, as indicated at the right hand of Fig. 2, and in Fig. 3.
I would call attention to the fact that by my construction the engagement of the
inner sides E of the flaps E' with the tops C of the slots C' has the effect of rigidly
locking the flaps CC at each end of the box together, preventing them from moving
outward, and, by reason of their attachment to the side wall flaps B, preventing
these side walls of the box from being moved outward; at the same time the side
edges of the flaps E and E¹ lie against the side walls B B and serve as braces to
prevent the side walls being moved together beyond their normal and intended
position. At the same time, the hook like engagement of the ends E³ of flaps E¹
prevent the disengagement of these flaps from flaps CC.

page_text: It will also be noticed that the bottom edge E³ of the flaps E' against the bottoms C³
of the slots C tend to hold the flaps C down and in contact with the bottom of tho
box, and tendency of the flaps C to rise being resisted by the direct thrust of the
flaps E and E'.
The simplicity and ease with which my new box can be put together is apparent
and need not be further described.
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.
1. A knock down paper box having side wall flaps B B and end wall flaps D D,
in-folding flaps C C at the ends of the side wall flaps, said flaps C having inclined
slots formed therein so as to extend inwardly and upwardly from the corners of
the erected box as described, in-folding flaps E extending from the top edges of the
end wall flaps as E¹ with inwardly projecting inner corners E² extending out
from the ends of flaps E and adapted to enter and engage inclined slot C₁ as
specified.
2. A knock down paper box having side wall flaps B B and end wall flaps D D,
in-folding flaps CC at the ends of the side wall flaps, said flaps C having inclined
slots C¹ formed therein so as to extend inwardly and upwardly from the corners of
the erected box as described, in-folding flaps E extending from the top edges of the
end wall flaps and projecting flaps as E' with inwardly projecting inner corners E²
extending out from the ends of flaps E and adapted to enter and engage inclined
slots as specified, said flaps E being formed to contact simultaneously with
the side flaps of the folded box and with the top and bottom of the inclined slots.
Dated this 28th day of April 1807
HASELTINE, LAKE & Co.,
45 Southampton Buildings, W.C., Agents for the Applicant.