US3446418A - Carton - Google Patents

Description

C. W. VOGT May 27, 1969 CARTON Sheet Filed May 5. 1966 INVENTOR CLARENCE W. VOGT ay- 27, 1969 c. w. VOGT 3,446,418

CARTON Filed May a. 1966 Sheet 8 of s CLARENCE W. VOGT ORNEYS C. W. VOGT CARTON Filed May a. 1

mmnmm INVI-INTOR CLARENCE w. VOGT a IASHQQ X LdM/w ATTORNFYS 3,446,418 CARTON Clarence W. Vogt, P.O. Box 232,

Westport, Conn. 06880 Filed May 3, 1966, Ser. No. 547,361 Int. Cl. B65d /14 US. Cl. 229-40 13 Claims ABSTRACT OF THE DISELOSURE This invention relates in general to new and useful improvements in cartons or containers, and more particularly to a receptacle which is readily adaptable to be filled utilizing a differential pressure filling apparatus.

A primary object of this invention is to provide a novel carton which may be seated within a supporting frame and having flaps extending upwardly beyond the walls of the body thereof whereby the carton may be initially filled beyond the normal confines thereof above the walls but within the fiaps and then the material placed therein compacted so as to be contained within the normal confines of the carton, after which the upstanding flaps may be folded into overlying relation to the cornpacted product.

Another object of this invention is to provide adjacent ends of the flaps with releasable connectors to prevent the escape of a fill between the ends of the flaps.

Another object of this invention is to provide a novel carton which may have the individual components thereof secured together and thereafter folded to a relatively fiat blank state for ease of shipment and handling.

Another object of this invention is to provide a novel sift proof carton wherein at least one pair of the closure flaps of the each end of the carton have the adjacent edges thereof in overlapped relation so as to eliminate any possibility of material sifting between the closure panels.

Yet another object of this invention is to provide a novel carton which is formed of a plurality of pieces of paper material and wherein the individual pieces of material are of difierent weights so as to provide the maximum strength where required and at the same time permit a savings in material.

With the above and other objects in view that will hereinafter appear, the nature of the invention will be more clearly understood by reference to the following detailed description, the appended claims and the several views illustrated in the accompanying drawings.

In the drawings:

FIGURE 1 is a plan view of a carton blank formed in accordance with this invention.

FIGURE 2 is a perspective view showing the carton blank of FIGURE 1 in a partially erected condition and inserted into a form retaining frame from the underside of the frame.

FIGURE 2a is a perspective view similar to FIGURE 2 and shows the same carton in a partially erected state ready for movement into the frame from the top of the frame.

FIGURE 3 is an exploded perspective view showing the carton after being filled and in an intermediate stage of being closed.

FIGURE 4 is a perspective view of the carton illustrating a further stage in the closing thereof.

FIGURE 5 is a perspective view of the completely closed carton with the carton now being inverted to its upright storage position.

FIGURE 6 is a perspective view of a partially secured together blank for another form of carton.

FIGURE 7 is an exploded perspective view of the carton of FIGURE 6 with the same being filled and in a partially closed position.

FIGURE 8 is a perspective view of the carton of FIGURE 7 after being closed.

FIGURE 9 is a bottom perspective view of the carton of FIGURE 8 and shows further the details thereof.

FIGURE 10 is a perspective view of a blank for still another form of carton.

FIGURE 11 is a perspective view of the carton of FIGURE 10 positioned within the supporting frame of a filling machine ready for receiving a product.

FIGURE 12 is a top perspective view of the filled and partially closed carton.

FIGURE 13 is an enlarged fragmentary vertical sectional view taken along the line 1313 of FIGURE 12 and shows the specific construction of the carton.

FIGURE 14 is a fragmentary perspective view showing the manner in which adjacent ends of flaps are telnporarily interconnected.

Referring now to the drawings in detail, it will be seen that there is illustrated in FIGURE 1 a blank for a carton member, which blank is generally referred to by the numeral 15. The blank 15 is formed of an elongated sheet of material, preferably paper material, which sheet is identified by the numeral 16. To the central portion of the sheet 16 there is secured a flatly folded carton body, which is generally identified by the numeral 17 and which is preferably formed of inexpensive paperboard.

The sheet 16 is provided with two longitudinally extending fold lines 18 disposed in alignment with the adjacent edges of the body 17. The sheet 16 is also provided with a pair of transversely extending fold lines 19 which are disposed in alignment with the folded body 17. The fold lines 13 and 19 define a rectangular closure panel 20 which underlies the body 17. Outside of the fold lines 18, the fold lines 19 define a pair of flaps 21.

The sheet 1 6 is provided with a second pair of transversely extending fold lines 22. Each set of fold lines 19 and 22, in cooperation with the fold lines 18, defines a closure panel 23. The fold lines 22 and 18 also define closure flaps 24 longitudinally adjacent the closure panels 23.

At the corners of the sheet 16 are closure flaps 25. Between the flaps 25 and the flaps 21 there are generally rectangular flaps 26. Each flap 26 is provided with a pair of diagonal fold lines 27.

The body 17 is of a continuous construction and includes four upstanding walls of which two walls are in the form of sides 28 and two walls are in the form of ends 30. The walls of the body 17 are connected together by means of a flap 31 which is illustrated as being at a corner of the body 17, but may be intermediate the edges of one of the walls.

At the lower edge of each of the sides 28 is an inwardly directed flap 32. A like flap 33 is disposed at the lower edge of each of the ends 30. The flaps 32 and 33, which are inwardly directed, are secured to the closure panel 20 by means of any conventional adhesive.

The body 17 also includes upstanding flaps. These flaps are relatively narrow and include flaps 34 extending from the sides 28 and fiaps 35 extending from the ends v2 30. The widths of the flaps 34 and 35 are substantially the same as those of the flaps 32 and 33.

It is also to be noted that the ends 30 of the flaps 35 have diagonal fold lines 36 extending upwardly in converging relation from the bottom corners of the ends 30. These fold lines 36 permit the flat folding of the ends 30 and the flaps 35 upon themselves with the sides 28 and the flaps 34 in overlying relation thereto, as is shown in FIGURE 1, so that the secured together sheet 16 and the body 17 may have the flatly folded blank condition shown in FIGURE 1 for ease of handling and storage.

It is intended that the carbon formed from the blank 15, which carton is generally referred to by the numeral 40, be filled utilizing a differential pressure filler. In order to prevent collapsing of the carton during the filling operation, it is positioned within a generally rectangular form retaining frame which is illustrated in phantom lines in FIGURE 2. and which is identified by the numeral 41. It will be readily aparent that once the body 17 has been erected, the body 17 may be slid up into the frame 41 from the bottom thereof. On the other hand, there are instances where the filling apparatus will be of a nature requiring that the carton 40 be inserted in. the frame 41 from the top in the manner generally shown in FIGURE 2a. In such instances, it will be necessary to loosely fold the sheet 16 up around the erected body 17 in the manner shown in FIGURE 2a.

Referring now to FIGURE 2a, it will be seen that when it is desired to insert the carton 49 into the frame 41 from the top, the sheet 16 is folded up around the carton body 17. This is first accomplished by folding the flaps 24 into overlying relation to the panels 23. Then the flaps 21 are folded up alongside the ends 30, after which the panels 23 are folded up alongside the sides 28, followed by the infolding of the flaps 26 over the flaps 21 and the ends 30. The carton 40, with the sheet 16 so temporarily folded, may now be slid into the frame 41 which opens a slight amount to provide the necessary clearance.

Referring now to FIGURE 3, it will be seen that after the carton 40 has been filled, the flaps 35 are folded over the product 42. Then a closure panel 43 is placed into overlying relation with respect to the open end of the filled carton 4t and bonded to the flaps 35. The closure panel 43 has a pair of depending flaps 44 which are telescoped relative to the ends 30 and are suitably adhesively secured thereto. Next the flaps 34 are folded into overlying relation with respect to the free edges of the closure panel 43 and suitably adhesively secured thereto.

After the closure panel 43 has been secured to the carton 40, the sheet 16 is folded up around the carton body 17 and the closure panel 43 with the panels 23 completely covering the sides 28 of the body and the flaps 24 overlying the flaps 34, as is shown in FIGURE 4. At the same time, the flaps 21 are folded up over the lower portions of the flaps 44. The flaps 25 are folded down over the upper corners of the flaps 44 and secured thereto. In the folding of the flaps 21 and 25, the flaps 26 are diagonally folded along the fold lines 27 so as to be generally triangular in outline. The flaps 26 are then folded inwardly towards the flaps 44 and are bonded to the flaps 21, 25 and 44 to complete the package. At this time the package, which is generally referred to by the numeral 45, is inverted, the carton 40 having been filled from the bottom. The package 45 is shown in its upright position in FIGURE 5.

At this time it is pointed out that three grades of material are utilized in forming the completed carton. The sheet 16 is formed of a relatively flexible material, the carton body 17 is formed of a medium strength material, such as paperboard, and the closure panel 43 is formed of .a higher strength material, such as E-flute which is a o rug t d oard.

Referring now to FIGURES 8 and 9, it will be seen that there is illustrated another form of package having substantially the same configuration as the package 45, but formed of a slightly different type of carton. This package is generally referred to by the numeral 50, and is formed from a carton, generally referred to by the numeral 51, and a closure panel 52.

Referring now to FIGURE 6 in particular, it will be seen that the carton 51 is of a one-piece construction and includes a generally rectangular body formed of four walls including two sides 53 and two ends 54. The walls of the body of the carton 51 are interconnected by means of a flap which is illustrated as being on the free edge of one of the ends 54. However, it will be apparent that the flap 54 could be intermediate the ends of one of the sides or the ends. Also, it will be apparent that the flap 55 may have a greater extent, although it is not necessary.

The lower edge of each of the sides 53 terminates in a closure panel 56. Similarly, the lower edge of each of the ends 54 terminates in a closure panel 57. The closure panels 56 extend from their respective sides a distance in excess of one half of the length of the ends 54 so that when they are folded, their edges remote from the sides 53 will overlap. In a similar manner, each of the closure panels 57 projects from its respective end a distance in excess of one half of the length of the sides 53 so that the adjacent edges of the closure flaps 57 will overlap.

When the closure flaps 56 and 57 are folded to form a closure of the carton 51, as is best shown in FIGURE 9, the flaps 56 are first folded into overlapping relation and bonded together, after which the flaps 57 are folded with their edges overlapping and bonded together. In addition, the flaps 57 will be secured to the flaps 56 to form a sift-proof closure for the carton 51.

The sides 53 have projecting upwardly therefrom narrow flaps 58. Similar narrow flaps project upwardly from the ends 54. The flaps 58 and 60 permit the filling of the carton 51 above the tops of the walls 53, 54 after which the material projecting above the body of the carton may be compacted down thereinto.

It is to be understood that after the flaps 56 and 57 have been connected together and the flap 55 connected to a respective portion of the carton body, the carton 51 may be folded to a relatively flat state for handling and storage. To this end, each of the ends 54 and its associated narrow flap 60 is provided with diagonal fold lines 61. These diagonal fold lines 61 permit the carton 51 to be folded in the same manner as that described above with respect to the carton body.

Referring now to FIGURE 7 in particular, it will be seen that after the carton 51 has been filled, the flaps 60 will be folded into overlying relation with respect to the product 62 placed within the carton. Then the closure panel 52 is placed into overlying relation with respect to the flap 60 and suitably adhesively secured thereto. The package 50 is then completed by folding the flaps 58 into overlying relation to the closure panel 52 and adhesively securing the same together.

At this time it is pointed out that the closure panel 52 has a removable panel portion 63 which is defined by a weakening line 64 formed in the closure panel 52. Thus, when it is desired to dispense the contents of the package 50, it is merely necessary to tear out the removable panel 63.

The carton 51 and the closure panel 52 may be formed of any economical paperboard material. However, it has been found that a maximum strength to cost ratio can be obtained with E-fiute which is a corrugated board.

Referring now to FIGURE 1-0 in particular, it will be seen that there is illustrated a carton blank, generally identified by the numeral 65, from which acarton shown in FIGURE 11 and generally referred to by the numeral 66, is formed. The blank 65 is formed from a single sheet of paperboard material which may be of any type includ ing E-flute corrugated board.

The carton 66 includes an upstanding body of rectangular outline having four walls including two sides 67 and two ends 68. The carton body is continuous with the juncture being by way of a flap 69. Although the flap 69 is illustrated as being at one of the corners of the carton 66, it is to be understood that it may be equally as well placed in the center of one of the sides or one of the ends of the carton.

Each of the sides 67 has extending from the opposite edges thereof a closure flap 70. A similar closure flap 71 extends from the edges of each of the ends 68. It is to be understood that if it is so desired, the flap 69 may extend along respective ones of the flaps 70 and 71.

When the carton 66 is erected from the blank 65, it is first shaped to its rectangular form, after which the lowermost ones of the flaps 71 are folded to close one end of the carton and the overlapped edges thereof are suitably bonded together, Then the lowermost flaps 70 are folded beneath the bonded together flaps 71 and are bonded to each other and to the flaps 71 to form a sealed bottom for the carton 66, the bottom being referred to by the numeral 72.

After the carton 66 has been so partially erected, it may be filled to contain the desired weights of products, by present day filling machines. The carton 66 may also be filled after having been so erected, and after having been inserted within frames of filling equipment such as shown and described in my copending application Ser. No. 518,269 filed Jan. 3, 1966. The carton 66 may be filled to levels above the walls 67, 68 which define the normal confines of the carton, and the filled material then compacted to the tops of the walls 67, 68 to the normal confines of the carton body. Thereafter the filled carton is closed by first folding inwardly the flaps 71 and securing together the overlapped edges thereof. Then, as is shown in FIGURE 12, first one of the flaps 70 is folded down into overlying relation to the flaps 71 and is bonded thereto, after which the remaining flap 70 is folded down and is bonded to the first flap 70 and the flaps 71 to complete the package.

It is to be understood that the carton 66 may be filled with a granular product which may be readily poured therefrom. Should this be the case, then one of the sides or ends of the carton body may be provided with a suitable pour facilitating device in the form of a removable panel portion 73 which is defined by weakening lines 74. When it is desired to dispense the product packaged within the carton 66, it is merely necessary to tear out the removable panel portion 73 and thereafter pour the product through the resultant opening.

It will be appreciated that when the aforedisclosed cartons are filled with certain materials, there will be a tendency for the material which is disposed above the upper edge of the body of each carton to flow out through the minute opening between the ends of the upper flaps. This may be readily eliminated in the manner shown in FIGURE 14 with respect to the carton formed from the blank 15. At each corner of the carton, a thin strip of material 80 will be permanently secured to one of the flaps such as by an over-all coating of adhesive 81 and releasably secured to the other of the two adjacent flaps by means of limited adhesive areas, such as the adhesive spots 82. It is to be understood that the strip 80 will be permanently secured to that flap which is folded first. In the case of the carton shown in FIGURE 14, the flaps 35 will be folded in advance of the flaps 34 and therefore, the strip 80 is permanently secured to the flaps 35 and releasably secured to the flap 34.

It will be understood that when the flap 35 is folded downwardly to a horizontal position, the strip 80 will be placed under tension and pulled from the flap 34. Thereafter, the flap 34 may be folded to its generally horizontal position. Inasmuch as the strip is formed of thin material, it will in no way interfere with the closing of the carton. It is also to be noted that the strip 80 may extend downwardly into partial overlapping relation with respect to the body walls 28 and 30, if desired, to assure a seal.

Although it is preferred that the strip 80 be formed of inexpensive paper material, it is feasible to form it of readily stretchable plastic material. In such event, when the flaps have a relatively small height, the plastic strip could be permanently secured to both the flaps with the plastic strip stretching as the flap 35 is moved downwardly in advance of the flap 34.

It will be readily apparent that all of the cartons formed in accordance with this invention are sift-proof and are of a construction so as to be readily usable in conjunction with a differential pressure filler which includes a form retaining frame, such as the frame 41. Also, by the economical use of materials having predetermined strengths, the cost of the cartons may be held to a minimum. Further, while the cartons 51 and 66 have been illustrated with all of the closure flaps forming the end closures thereof having the free ends thereof overlapped relative to opposed like closure flaps, in order to conserve material, only those closure flaps secured to the longer body walls, that is the sides of the carton body, need have overlapping ends to make the end closures sift-proof.

I claim:

1. A sift-proof carton comprising a rectangular body having walls in the form of sides and ends, a closure flap extending from a predetermined edge of each of said sides and ends, at least one pair of opposed closure flaps extending from the opposed edges of these associated walls an amount in excess of one half the length of the other of said body walls and having a lapped sealed connection between free edge portions thereof the opposite edges of said body walls having narrow closure flaps projecting therefrom, and a separate closure panel secured to said narrow closure flaps.

2. The carton of claim 1 wherein one pair of said narrow closure flaps underlie said closure panel and the other pair of said narrow closure flaps overlie said closure panel.

3. A knock down sift-proof carton comprising a rectangular body having walls in the form of sides and ends, a closure flap extending from a predetermined edge of each of said sides and ends, at least one pair of opposed closure flaps extending from the opposed edges of these associated walls an amount in exces of one half the length of the other of said body walls and having a lapped sealed connection between free edge portions thereof, said carton in its knock-down state being flatly folded with said body being continuous and said closure flaps being permanently secured together in said lapped sealed relation.

4. The sift-proof carton of claim 3 wherein an opposed pair of said body walls have diagonal folds and are reversely folded upon themselves and said closure flaps, and the other pair of said body walls are folded in overlying relation to said folded pair of body walls and said closure flaps.

5. A sift-proof carton comprising a carton member having a generally rectangular body formed of interconnected walls and a sealed end closure closing one end of said body, a first pair of narrow flaps extending generally across the other end of said body in opposed relation, a closure panel overlying and secured to said first pair of narrow flaps, and a second pair of narrow flaps extending generally across said body other end in opposed relation and normal to said first pair of narrow flaps and sealed to said closure panel in overlying relation thereto.

6. The carton of claim 5 wherein said closure panel has a pair of flaps extending from opposite ends thereof and secured to those body walls from which said first pair of narrow flaps extend.

7. The carton of claim 6 wherein said end closure is formed separate from said body, has flaps overlapping said closure panel flaps and other flaps overlapping edges of said closure panel remote from said closure panel flaps.

8. The carton of claim 7 wherein said body is formed of a medium strength material, said closure panel is formed of a higher strength material, and said end closure is formed of a lower strength material.

9. The carton of claim 5 wherein said end closure is formed separate from said body and is sealed to all of said body walls and to said closure panel.

10. The carton of claim 5 wherein said end closure is formed separate from said body and said body has other pairs of narrow flaps at said one end sealed to said end closure.

11. A carton member comprising a generally rectangular body having interconnected walls, and an end closure sealing one end of said body, said body having inwardly extending narrow flaps at said one end secured to said end closure, and said end closure extending outwardly beyond said body for eventual folding up around said body.

12. The carton member of claim 11 wherein said carton member is formed from a flatly folded blank wherein said end closure is planar and said body walls are folded into overlying relation to said end closure.

13. The sift-proof carton of claim 5 wherein ends of adjacent narrow flaps are interconnected by temporary sealing means prior to the filling of the carton to prevent the loss of fill between narrow flap ends, and wherein the narrow flaps are free to fold inwardly notwithstanding the existence 0t said sealing means.

References Cited UNITED STATES PATENTS 939,825 11/1909 Frank 229-17 1,667,869 5/ 1928 Peterson 229-33 X 2,142,342 1/1939 Bensel 229-37 X 2,395,663 2/ 1946 Howard 229-37 2,421,225 5/ 1947 Stensgaard 229-23 2,568,170 9/1951 Ringler 229-14 2,712,382 7/1955 Clarke 229-33 X 2,986,321 5/ 1961 Schaich 229-23 3,245,526 4/ 1966 Palmer 229-37 X 3,261,536 7/1966 Bixler 229-37 3,3 11,286 3/ 1967 Giacoppe 229-37 688,114 12/1901 Plester 229-40 X 1,152,353 8/ 1915 Schwerdtle 229-40 1,827,334 10/1931 Rider.

1 FOREIGN PATENTS 960,832 7/ 1964 Great Britain.

US. Cl. X.R.

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