US466792A - Philip lindemeyer - Google Patents

Description

(No Model.)

P. LINDEMEYER; PAPER BOX.

No. 466,792. Patented JanVIZ, 1892.

WITNESSES:

lJ'NITED STATES PATENT Genres.

PHILIP LINDEMEYER, OF BALTIMORE, MARYLAND, ASSIGNOR TO ISAAC FRIEDENWALD.

PAPER BOX.

SPECIFICATION forming part of Letters Patent No. 466,792, dated January 12, 1892.

Application filed August 20, 1889. Serial No. 821,876. (No model.)

T a, whom it may concern.-

Be it known that I, PHILIP LINDEMEYER, a resident of Baltimore, in the State of Mary land, have invented certain new and useful Improvements in Paper Boxes; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use the same.

The object of the invention is to provide an improved paper box that can be made from a single blank and closed and secured at each end by overlapping pieces provided with double locks of a particular form. I-Ieretofore it has been found in boxes of this general character having a single look that it was liable to become disengaged or unlocked by external or internal pressure, and particu larly during the operation of filling the same as for example, with candy. In such case it is desirable to settle the contents of the partially-filled box by shaking or agitating it, and such operation has been very liable in prior constructions to shake loose the look at the end opposite to that into which the candy or other material is being supplied. Furthermore, constructions employing a double lock have been liable to tear out, and particularly where two slots were formed in one flap to receive corresponding parts suitably shaped on an opposing flap. Double locks heretofore employed have also been liable to disengagement in filling the boxes, as above specified of single locks, owing to the want of lateral hooks shaped, situated, and operating as those herein set forth.

According to the present improvement a double lock is formed that will not be loosened by pressure against either its exterior or interior surface, but which will be rather tightened thereby, and one which while securing this important advantage also avoids the use of two slots in one flap and the weakening eitect of such construction.

The invention consists in the construction hereinafter described and pointed out.

In the accompanying drawings, which form part of this specification, Figure 1 is a perspective View of the improved box. Fig. 2 represents a blank cut in suitable form for making a box. Fig. 3 represents a modified form of the same, and Fig. 4 is a view of a modified detail.

The referencefigures 1 1 indicate portions of the blank which form two opposite sides, and 2 2 indicate parts which form two sides at right angles to the parts 1 1. 3 form the ends lying underneath the locking-laps 4 4. The part 11 constitutes a usual feature of construction, whereby the ends of a box-blank are secured together.

To form the lock, each flap 4 is provided with a tongue 5, having a projection 6 at one side of the flap and with a slot 7 at the other side, which slot is preferably made in angular form, as shown. The projection 6 is formed by cutting a curve 8 at the side of the tongue, which curve connects with a straight edge 10, cut as represented. The main part of the slot 7 lies in a direction approximately at right angles to the edge 10.

To form the box after the blank is prepared, it is first folded on the lines a b a b, so as to bring similar parts opposite each other, the small portion 11 being made to extend under the outer edge of 2 and glued or otherwise se-' cured thereto. The parts3 3 are then folded on the line 0 c or d (I, so as to be at right angles with parts 1 and 2. Thus folded, they overlap each other and constitute the main portion of the ends of the box. The parts 4 4 are subsequently folded down upon line 0 c or cl d, so as to bring the right-hand tongues over the left-hand slots, and vice versa. By springing the adjacent parts 4 4 laterally in opposite directions each tongue can readily be entered in its corresponding slot, the hook or projection 6 slipping through the inner end of the slot, and the parts 4 4 are then moved back laterally until the straight edges 10 10 t are in contact, as represented in Fig. 1. These edges 10 1O cross each other at an acute angle, as shown, and form a stop to prevent the accidental removal of the hooks or projections 6 from the slots. These projections are in curved form (they may be angular, but should have a hook form)and engage the innor ends of the slots, which they cannot do unless they are so shaped that when entered in the slots their extremities can slip back behind the edge of the slot by which they were passed in entering the same-that is to The parts 3 say, if they were not made in hook form substantially as shown and described. Such projections will engage the wall of the slot at its end all the more firmly when pressure is applied to the end of the box, and they cannot be drawn out as are projections which have their edges extending only in the direction in which they are entered in the slots. The locking connection is readily made by slightly bending or springing the flaps in which are formed the tongues and slots and thrusting the tongues into the corresponding slots, and this connection can be unmade when desired without difficulty, while the crossing of the edges 10 10 and their consequent engagement and the alternate overlapping of the flaps on their two sides effectually prevent accidental separation.

As indicated in the drawings, my improved lap and lock are adapted to boxes of dissimilar forms, Figs. 1 and 2 indicating blanks suitable for rectangular and wedge-shapedboXes, respectively, and the improvement is therefore not limited in this respect. It is also obvious that the size of the tongues and slots may be varied and that the latter may be made in one straight line and also by cutting out or removing a part of the material. The particular formof the curve is not essential, nor is it essential that edges 10 10 should be made straight, as they may be formed as indicated in Fig. 4: or otherwise shaped. It is further obvious that the locking devices may be omitted at one end of the box and that a plain end piece secured in any ordinary way may be substituted.

It may be noted that the usual strain or pull upon the wall of the slots 7, caused .by

pressure from within the box, for example, is not in the direction of the slot, but transverse to its direction, as indicated by the arrow. To add strength to the parts in the direction of the slot, however, it is only necessary to curve the lines 10 as in Fig. 4; but thisis not essential.

Having thus described my invention, what I desire to secure by Letters Patent is as follows:

1. A folded box having its ends composed in part of flaps provided with the tongues having lateral hooks and with slots, the hooks of the tongues engaging the edge of the slot, said flaps havingtheir edges between the slots running in the same direction as the tongues and lying in planes which cross each other at an acute angle, whereby the edges abut throughout their whole length and form a practical stop, substantially as set forth;

2. A blank comprising similar parts in the usual form, adapted to constitute the sides and ends of the box, and having flaps adapted to constitute in part the ends provided with tongues having lateral hooks and with slots, the hooks of the tongues being suitable to engage the edges of the slots, said flaps having each an edge 10 running in the same direction as the tongue and adapted when placed in operative position to cross the other at an acute angle, substantially as set forth.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

PHILIP LINDEMEYER. Witnesses:

FRANK DE S. BENZINGER, JosDEUTsoH.

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