US2664236A - Carton blank - Google Patents

Description

D. LEVKOFF Dec. 29, 1953 CARTON BLANK 2 Sheets-Sheet 1 6 Filed Aug. 17. 1949 INVENTOR.

Jul/id, lean/Yo By Z alto

Dec. 29, 1953 LEVKOFF 7 2,664,236

CARTON BLANK Filed Aug. 17, 1949 2 Sheets-Sheet 2 Fig.5. 2:-

4 5 INVENTOR 3 2r Wz Patented Dec. 29, 1953 UNITED STATES PATENT OFFICE CARTON BLANK David Levkofi, Great Neck, N. Y.

Application August 17, 1949, Serial No. 110,770

1 Claim.

This invention relates to cartons, and particularly to those of tray-like form generally used for containing vegetables, fruits or other articles.

Many of the articles packed in cartons or containers of this character, such as tomatoes or other vegetables or fruits, are of substantial weight, and therefore while it is desirable to be able to produce tray-like cartons of relatively light-weight cardboard, it is essential that the carton be reinforced or strengthened at required locations to enable it to maintain its shape during all conditions of use and protect its con tents.

One of the objects therefore, of the present invention, is to provide a carton of the character described, and composed of a single piece of card-board, which will be reinforced and strengthened in a manner enabling it to maintain its shape under hard conditions of use; and which will be so constructed that portions of the same which are adhesively united may be gummed, folded and attached by simplified means and with a minimum of operations.

With these and other objects to be hereinafter described in view, I have devised the particular arrangement of parts set forth in the following specification and more particularly pointed out in the claim appended hereto.

In the accompanying drawings, wherein an illustrative embodiment of the invention is disclosed, Fig. 1 is a view of the blank from which the carton is produced, looking at the inside face of the blank; Fig. 2 is a face View of an end portion of the blank, showing the reinforcing flaps for the side walls folded down to reinforcing position, and the adhesive applied to the end panel flaps; Fig. 3 is a sectional view taken on the line 33 of Fig. 2, looking in the direction of the arrows; Fig. 4 is a view of one end portion of the blank, showing the same in its completely glued and folded position; Fig. 5 is a vertical sectional view through the erected carton looking toward one of the end walls of the same; Fig. 6 is a sectional view taken substantially on the line 6-6 of Fig. 5, looking in the direction of the arrows; Fig. '1 is a side elevation of a portion of the carton in a partly erected position, and Fig. 8 is a sectional view in perspective, of the erected carton.

The carton made according to the present invention is preferably, but not necessarily, produced from a single piece of card-board stock, and from a substantially rectangular blank I shaped as shown in Fig. 1. The blank so formed is provided with a central portion defined by the spaced longitudinally-extending parallel score lines 3 and 4, said central portion comprising the bottom of the carton, as indicated at 2, the two end panels l4 and I5, and the two retaining flaps indicated at 24.

The side walls of the carton are indicated respectively at 5 and 6. That shown at 5 is located between the parallel score lines 3 and 1, while that shown at B is defined by the score lines 4 and 8. Extending laterally beyond the score line 1 is a reinforcing flap 9 which, in the formation of the carton, is folded inwardly on the score line 1 and caused to overlie the inner face of the side wall 5 to which it is adhesively secured by means of the line of adhesive H applied adjacent the outer edge of the reinforcing flap 9 substantially as shown in Fig. 1.

The side wall 6 is provided with a similar reinforcing flap indicated at H), the same being also provided with the line of adhesive l I, and is adapted to be infolded along the line 3 to extend over the inner face of the side wall 6 and be adhesively attached thereto. The reinforcing flaps 9 and ID. in their infolded positions, are

' shown in Fig. 3, wherein it will be noted that the same do not extend for the full height of the side walls, but only for a portion thereof and to a sufiicient extent to lend stiffness to the side walls and prevent lateral spreading of the same under pressure imposed by the contents of the carton.

Extending between the ends of the side walls 5 and 6 and the side edges of the end panels I5 are the webs indicated respectively at l6 and 20. Each web includes a tongue portion, that found on the Web It being indicated at I8, while that found on the web 20 is indicated at 23.

The webs l6 and 26 are notched respectively at H and 22 and from the apex of each notch to the junction of each side wall and end panel extends an angular score line. That provided in the web It is seen at 19 while that found in web 20 is indicated at 2|.

After the blank has been stamped out of a sheet of cardboard, it is fed to a suitable gluing apparatus which produces the two lines of adhesive, shown at l I, on the inside faces of the reinforcing flaps 9 and I0. These flaps are thereupon respectively and simultaneously folded inwardly on the score lines I and B which causes them to be adhesively attached to the inner faces of the side walls 5 and 6 as shown in Figs. 2 and 3. Then the gluing device applies areas of glue indicated at 21 to the end portions of the tongues I 8 and 23 on the inner faces of the same. As

will be noted in Fig. 1, the reinforcing flaps 9 and I0, when in their extended positions, or while the blank is in the flat, project farther laterally than the end portions of the flaps I8 and 23. This permits ready application of the glue lines 1 I to the flaps 9 and I without the glue contacting the ends of the tongues, the application of the glue thereto, as at 21, taking place after the reinforcing flaps 9 and [0 have been inturned as previously mentioned.

After the glue areas 27 have been applied to the tongues 18 and 23, the blank is then folded on the score lines 3 and 4, and this will cause the tongues I8 and 23 at each end of the carton to be brought in overlapped relation and become adhesively attached together.

In the drawings, and particularly in Fig. 4; thereof, the web 6 with the tongue 18 thereon was first infolded and the glue area 27 thereon brought into contact with the end panel 14 and adhered. thereto. The web 20 then came down on top of the web l5, bringing the tongue 23 on top,

of the tongue is and attaching tongue 23 to tongue 18. If desired, the glue area on one of the tongues may be omitted, and a glue area provided only on the tongue which is outermost, this being sufficient to hold the tongues in overlapping relation as shown in Fig. 4.

This completes the gluing operation for the carton, which is then in the flattened and folded position as shown in Fig. 4. The carton is readily erected or set-up, by suitable machinery or by hand, and this involves the imposition of pressure on the opposite end panels of the folded blank, which causes the end panels to rise to vertioal position by being upwardly folded on the transverse score lines 12 and 13. In Fig. 7 is shown one of the end panels partly folded upwardly as above described. As the end panels are moved toward a vertical position, the webs 1.6 and 20 fold on the diagonal score lines [9 and 2d thus bringing the side walls to erect or vertical position. When the end panels reach a vertical position, they are retained by means of the retaining flaps 24. These flaps are downfolded on the score lines 25 so that they extend down into the carton and. when tucked therein, they extend over the webs l6 and 2,0 and look behind the ends 25!v of the glued-down reinforcing flaps 9 and [0, thus holding the carton in its setup position, an end portion of the carton in such position being shown in Fig. 8.

By the employment of reinforcing flaps on the side walls in the manner explained and having the relative proportions as described with respect to the tongues 18 and 23, the glue application to '4 the flaps and tongues is facilitated; the folding down of the reinforcing flaps is readily performed and the box or carton, when erected, is sturdy and strong.

While I have shown one embodiment of the invention, it is obvious that the same is not to be restricted thereto, but is broad enough to cover all structures coming within the scope of the annexed claim.

What I claim is:

A blank for producing a tray-like carton comprising, a substantially flat, rectangular one-piece strip, said strip having parallel score lines dividing it into a bottom and a pair of side walls, additional score lines extending longitudinally of the side walls to provide reinforcing flaps for inturning and securement over the inner faces of the side walls, said reinforcing flaps being gummed adjacent to their outer edges only and being of a width less than the depth of the side walls, an end panel at each end of the blank, diagonally foldable webs located between the end panel and the ends of the side walls, each of said webs including tongue portions extending laterally from the end panel to an extent less than the lateral projection of the reinforcing flaps before said flaps are infolded and secured down over the side walls, said tongue portions ending in alignment with the innermost terminations of the gummed areas on the reinforcing flaps whereby the gumming of said areas can take place during the longitudinal movement of said blank without encroachment upon the tongue portions, the tongue portions having ends which extend beyond the side walls after the reinforcing flaps are infolded whereby an adhesive can then be applied to said ends of the tongue portions during the longitudinal movement of said blank which extend beyond the reinforced side walls, and a looking flap on the panel for extension over the tongue portions and adapted to lock behind the ends of the reinforcing flaps when the blank is erected.

DAVID LEVKOFF.

References Cited in the file of this patent UNlTED STATES PATENTS Number Name Date 1,456,248 Moyer May 22, 1923 1,720,506 Wise July 9, 1929 1,758,513 Gross May 13, 1930 1,886,879 Gross Nov. 8, 1932 1,935,019 Comley Nov. 14, 1933 2,220,076 Carruth Nov. 5, 1940 2,220,121 Ringler Nov. 5, 1940

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