US1669454A - Cardboard box - Google Patents

Description

May 15, 1928.

F. R. CLOSE CARDBOARD BOX Filed May 2, 1925 2 Sheets-Sheet l H M J May 15, 1928.

F. R. CLOSE CARDBOARD BOX Filed May 2, 1925 2 Sheets-Sheet 2 Patented May 15, 1928.

UNlTED STATES PATENT OFFICE.

IRAN C18 ROBERT CLOSE, OI BAIILTON, ONTARIO, CANADA, ASBIGNOB 'I'O rm: DUN- CAN LITHOGBAPHING COMPANY, LIMITED, HAMILTON, ONTARIO, CANADA.

CARDBOARD 301.

Application fled Kay 2, 1925, Serial No. 27,485, and in Canada June 16, 1880.

My invention relates to improvements in cardboard boxes, and the object of the invention is to provide a more secure and reliable closure for boxes of this type than hitherto; a further object is to so construct the box that the contents thereof will assist in maintaining the closure; and a still fur ther object is to provide a novel type of seal for such boxes.

My invention consists of the construction and arrangement of parts, all as hereinafter more particularly described and illustrated in the accompanying drawings in which Fig. 1 is a perspective view of a portion of a box constructed according to my invention, showing the box in the open position.

Fig. 2 is a perspective view thereof showing the box in the "partially closed position.

Fig. 3 is a top plan view of the box in the fully closed position.

Fig. 4 is a fragmentary section on the line H of Fig. 3.

Fig. 5 is a view similar to Fig. 1 showing a modification of my invention.

Fig. 6 is a perspective view of the modification illustrated in Fig. 5 showing the box in the partially closed position.

Fig. 7 is a top plan view of the modification illustrated in Figs. 5 and 6 showing two inner closure flaps in the closed position, an outer closure flap being in the raised position and a portion thereof broken away.

Fig. 8 is a fragmentary section on the line 8-8 of Fig. 7.

ence indicate corresponding parts in the various views.

Reference will first he made to the form of my invention illustrated in Figs. 1 to 4, inclusive.

The invention is applicable to any ordinary cardboard box 1 and comprises the inner closure flaps 2 and 3 carried by opposite side walls 4 and 5 re ectively, and the outer closure flaps 6 carrie by the rear wall 7.

The flaps 2 and 3 are each provided with an orifice 8, disposed longitudinally thereof.

The flap 6 is formed with a transverse crease 9 intermediately of its length, which crease is discontinued for a space A in the centre of the flap.

This crease, it will he noted. divides the fla 6 into two sections 10 and 11.

In the drawings, like characters of refer-' The flap 6 is further creased transversely thereof at 12 and the outer ortion comprises an inserting flap 13 w ich will be hereinafter referred to.

The fla 6 is cut through along the line 14 (see ig. 3) to form a tongue 15 u on the flap section 11 and an orifice 16 wit in the flap section 10.

This tongue 15 projects from the flap section 11 into the flap of the tongue coincides with the discontinued portion A of the crease 9.

It'will be noted that the crease 9 extends laterally from each end of the base of the tongue 15 to the adjacent side edge of the fla 6. I he front wall of the box is indicated by the numeral 17.

Reference will now be had to the modification illustrated in Figs. 5 to 8 inclusive.

In this modification, closure flaps 18 and 19 are carried respectively by the opposite side walls 4 and 5 ofthe box.

An outer closure flap 31 is carried by the rear wall 7, an inserting flap 20 being carried by this outer flap 31. a

The flap 18 is provided with an orifice 21 disposed transversely thereof.

The flap crease 22 mtermediately of its length crease is discontinued for a space 13 centre of the flap.

This crease, it will be noted, divides the flap 19 into two sections 23 and 24.

The flap 19 is cut through along the line 25 (see Fig. 7) to form a tongue 26 upon the flap section 24 and an orifice 27 within the flap section 23.

This tongue 26 projects from the flap section 24 into the flap section 23 and the base of the tongue coincides with the discontinued portion B of the crease 22.

It will be noted that the crease 22 extends laterally from each end of the base of the tongue 26 to the adjacent side edge of the flap 19.

The fla 19 is provided with a further cut 27 theretlirough-which forms a tongue 28 within the flap.

29 (see Fig. 7) indicates an adhesive sealing strip.

The construction and operation of my invention is as follows Reference will first be had to the embodiment illustrated in Figs. 1 to 4 inclusive.-

which in the section 10 and the base- 19 is formed with a transverse It will be noted that the closure for the box consists of three flaps 2, 3 and 6 which are adapted to operate in su erimposed relation.

The flaps 2and 3 are rst folded one upon the other, the orifices 8 therein being so disposed that they register withea-ch other.

The flap 6 is then folded down upon these flaps 2 and 3, the flap section 11 being bent upwardly about the crease 9 so that the tongue 15 projects through the orifices 8 into the interior of the box.

The flap section 11 is then folded downwardly and the inserting flap 13 asses inwardly behind the front wall 17 o the box, in which operation, the tongue 15 moves upwardly a ainst the under face of the undermost tip 2.

This completes the closing of the box.

In Fig. 4 the contents of the box, such as a bottle for instance, is indicated in broken lines by the numeral 30 and it will be clear, that the upper face of the article 30 will tend to force this tongue 15 upwardly against the under face 0 the flap 2, thus tendin to further secure the tongue against withdrawal.

Both ends of the box may of course be provided with my closure, so that the pressure of the article within the box against the ends thereof will assist in maintaining the closure.

Reference will now be had to the modification illustrated in Figs. 5 to 8 inclusive. The operation of this modification is practically the same as that already described except that the closure flap 19, carried by one of the side walls of the box, coacts with the closure flap 18, carried by the opposite side wall, in the same manner as the flap 6 co-acts with two flaps 2 and 3 in the previously described construction, the flap 31 in this case simply being a plain outer flap which closes downwardly upon the flaps 18 and 19.

In this case the contents of the box, indicated bythe numeral 32 presses upon the tongue 26 in the same way as previously described. i

' The operation of the sealing device illustrated in connection with the modification shown in Figs. 5 to 8 inclusive will be clear from the drawings and comprises an adhesive sealing strip 29 which engages the u per ifiace of the tongue 28 and the top face 0? the ap 18. c

This sealing device may of course be applied to the form illustrated in Figs. 1 to 4 inclusive.

From the foregoing it will be ap arent that I have devised a closure for cardboard boxes which will be exceptionally secure and reliable and in which the contents of the box will assist in maintaining the closure in position. What I claim as my invention 1s:

g A rectan lar box comprising, closure flaps carrie res ectively by the back and side walls thereo the front wall having no flap, said flaps adapted to fold u on each other to form a closure, the rear ap being outermost when closed, one of said flaps provided with a cut therein forming a tongue within said flap, said fia formed with a crease extending from eac side of the base of the tongue to the ad'acent side edge of said flap, another of said aps which folds below the aforesaid cut flap rovided with an orifice throu h which sai tongue is adapted to extent? when the He s are folded to close the box, the rear flap tbrmed at its free end with a panel adapted to lie along the inside face of the front wall of the box.

' FRANCIS ROBERT CLOSE.-

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