US2053726A - Paper container - Google Patents

Description

P 1935- c. L. MARSHALL I 2,053,726

PAPER CONTAINER Filed Oct. 5, 193-4 2 Sheets-Sheet 1 Sept. 8, 1936. c. L. MARSHALL 2,053,726

PAPER CONTAINER Filed Oct. 5, 1934 2 Sheets-Sheet 2 IIIII Patented Sept. 8, 1936 PAPER/CONTAINER Clifford Lancaster Marshall, Newark, N. J., assignor to Mono Service 00., Newark, N. J.

Application October 5, 1934, Serial No. 747,097

9 Claims. (c1. 229-51) This invention relates to paper containers such as are described for example in the specifications of Elmer Zebley Taylors United States Patent No. 1,961,535 and Edmund Paul Herrmanns United States Patents Nos. 1,963,994 and 1,954,- 815, inall of which means are described for opening conical double-walled paper containers comprising various arrangements of weakening lines around that end of the blank to form the end of the container at which the latter is to be opened, enabling the portion between such weakening lines to be readily torn out and so exposing the contents for use as required.

In practice it has been found that when containers of this class as hitherto manufactured are used for certain products, such as those of a sticky or semi-solid nature (marshmallow, peanut butter and the like for example) portions of the contents adhere to and come away with'the torn-out strip, particularly with the comparatively rough edges thereof caused by the-indentations forming the weakening lines. One of the objects of the presentinvention isto overcome this disadvantage.

In the prior patents hereinbefore referred to,

it is preferred. that the container shall be filled at its larger end, have a closure inserted and secured therein, and then be reversed so that. its' smaller end becomes the top. The weakening lines are therefore formed at this smaller end,

which is consequently that which is to be removed in opening, and a further object of the present invention is to facilitate the use of this removed end as a cover if all the contents have not been removed, which is not possible in the case of some of the arrangements described in the prior in combination with a single cut through the part forming the inner layer, ,as more particularly hereinafter described in connection with the accompanying drawings, in which Fig.1 is a plan view of the blank for the body showing one meth- 0d of carrying out the invention. Figs. 2 3 and 4 are similar views showing modifications there of. Fig. 5 is a detail view on a larger scale of part of the blank shown in Fig. 4, while Fig. 6 is a sectional view through the upper smaller end of a container before the strip between the weakening lines has been torn out, and Fig. '7 a similar view but showing the strip torn out and the the inner wall of the rolled-up body.

the rolling operation.

top separated and ready for use as a cover. Figs. 8, 9 and 10 are views of the upper end of-a. con-jtainer illustrating the methodof opening same.

Referring to these drawings it will be seen that the blank I is formed with weakening'lines 2, 3, which are parallel, or approximately so, with each other and with the edge of the portion A of the blank which is, vwhen the latter is rolled up, to form the outer wall of the container. At about the centre of vthe blank a cross out t is ,r'nade through same, between the ends of the weaken-,

ing lines 2, 3, and from the weakening line 2 a cut 5 .is made extending towards the edge of the PATENT omen} blank for a convenient distance and then con- As the out line 5 is nearer the edge of the blank 1 than the weakening line 2, it will be seen that when as hereinafter described the strip between the weakening lines is torn out such cut 5 will remain covered by the depending edge of the outer wall, so that thecontents cannot escape therethrough, while after opening the-dependingsedge of the outer wall can-be fitted down onto'the upper edgeof the exposed inner wall and. make.

a good joint therewith. Tofacilitate the rolling-up operation, particularly when this is effectedby automatic machintogether;'so that there will not be a narrow loosev end, consisting of the part. marked 1, depending from: the blank, and which might interfere; with.

A modification of this arrangement is shown in Fig.2 of the drawings, where instead of'forming the cut 5 through theblank and leaving the part '1 thereof attached thereto, such part I is entirely cut away. The effect of this wouldbe thatthe container would be of a single thickness only at that point, which may not be objectionable :in

some cases, although of course it renders the conv tainer somewhat weaker there. I

In Fig. 3 instead of making the cut 4- through the blank, the inner ends ofthe weakening lines 2, 3, are connected by another weakening line 8 The blank shown in Fig. 4 is similar to. that I shownin Fig. 1, but instead of .entirely interrupting thecut at the points 6, the interruptions are filled up by double rows of perforations H! which are preferably arranged as shown in Fig. 5 so that the perforations in one line are opposite the spaces between those in the adjoining line, enablingthe strip 1 to be quite easily separated when the container is to be opened.

The weakening lines 2, 3, are preferably each formed by two rows of perforations arranged'in the same way as those shown at Ill in Fig. 5.

The blank i, of any of the forms above described, is intended to be rolled up to form a contcal double-walled body the smaller end of which is shown in section in Fig. 6, and into this smaller end a closure such as it is inserted in the course of manufacture, the other or larger end being left open until the container has been filled, after which a closure is also inserted therein. When this has been done it is intended that the container shall be reversed so that the smaller end becomes the top.

When it is subsequently desired to open the container to gain access to the contents, the strip 8 between the weakening lines 2 and 3 and extending once round the container is'to be removed, and to facilitate this when the blank shown in Fig. 1 is employed the end E2 of such strip 9 is not attached to the inner wall, the rolling-up machine being so arranged that adhesive is not applied to this part. The thumb nail can then be easily inserted under the end i2 and the strip 9 removed by grasping same and tearing round the weakening lines 2, 3, and if necessary breaking the interruptions 6 in cross out 4.

If desired a tab can be left on the outer edge of the blank and left unpasted to facilitate the removal of the strip 9, or the cut l3 shown in Figs. 2, 3 and maybe made near such outer edge, through the strip 9, and form a tab which, not being secured by the adhesive to the inner wall, can be lifted and used in the same way to start the removal of the strip 9.

The effect of this operation will be seen on reference to Figs. 8 and 9, Fig. 8 showing the upper end of the container ready for opening, while Fig. 9 shows same after the strip 9 between the weakening lines 2 and 3 has been torn out, exposing the outer surface of the inner wall, but leaving the contents still completely enclosed. It will therefore be seen that such contents are never in actual contact with the strip 9, so that the latter is quite clean when removed.

A convenient method of completing the removal of the top of the container, with the end closure ll held therein, is illustrated in Fig. 10, and con,- sists in pressing the thumb against the exposed part of the inner wall at a suitable point, thus forcing same inwardly until the thumb nail can be entered under the edge of the top, when such top can be hinged upwardly, breaking the connections 6 or ill which were left on the blank to facilitate the rolling up of the body.

In the case of the body blank being of the form shown in Fig. 2 the connections 6 or ill will of course not be present so that the top can be more easily removed.

In using any of the forms of body blanks described, the mechanism for applying adhesive to the body blank is to be so arranged that such adhesive shall not be applied to the strip 9 between the weakening lines 2, 3, or the part I between the cut 5 and the edge of the blank, the mild form of adhesion produced by the treatment with paraffin wax or other material being sui'dcient to hold the parts together until the container is opened.

When the top has been removeda clean and smooth upper edge to the container will be obtained, such edge being formed by the cut 5, over which the contents can be freely poured if of a liquid nature, while if of a sticky or pasty nature there will not be such a tendency for same to adhere to such edge as if the latter were rough or uneven.

' The removed top can be replaced if all of the contents have not been emptied out, and will form a very emcient cover. Further when the container is used for such commodities as dried milk or various kinds of breakfast food of which a certain quantity is to be taken at a time, the weakening lines 2, 3, may be placed in such a position that the removed top will serve as a measure for such quantity.

In the manufacture of the container it is preferred to form the cut 5 in such a position that when the closure 5 i is inserted, such cut 5 will as shown in Fig. 6 be situated slightly above the under surface of the closure I I. The effect of this is that when the removed top is replaced it will enter a shallow groove it (see Fig. 7) and so make a tight joint. In actual practice the small fillet of wax, shown at E5 in Figs. 6 and '7, which is usually obtained in the waxing operation, will assist the formation of a good joint at this point.

What I claim and desire to secure by Patent l. A double-walled conical paper container provided with means for opening same comprising two rows of weakening lines extending around the outer wall only to enable the strip between them to be entirely removed, exposing the inner wall in which a cut is made extending right round same and located nearer the edge of the blank than said weakened lines, so that the separated top with the end closure secured therein can be removed and subsequently used as a cover, as set forth.

2. A double-walled conical paper container provided with means for opening same comprising two rows of weakening lines arranged approximately parallel with the edge of the blank from which the container body is made but extending around the outer wall only, to enable the strip between them to be entirely removed to expose the inner wall, and a cut around such inner wall also approximately parallel with the edge of the blank and located nearer the edge of the blank than said weakened lines, so that when the strip between the weakening lines in the outer wall-has been torn out the upper end of the container with the end closure secured therein can be removed, as set forth.

3. A double-walled conical paper container provided with means for opening same comprising two rows of weakening lines extending around the outer wall only to enable the strip between them to be entirely removed, exposing the inner wall in which a cut is made extending right round same with the exception of points of attachment at suitable positions which are to be broken when the top with the end closure secured therein are to be separated to complete the opening, said inner wall cut being located nearer the edge of the blank than said weakened lines.

4. A double-walled conical paper container provided with means for opening same comprising two rows of weakening lines extendin around the outer wall only, a cross out between the inner ends of the weakening lines, and a cut extending around the inner wall, and located l wall-and located nearer the edge of the blank than said weakened lines, as set forth.

6. In a double-walled conical paper containerthe employment of a blank for the body provided with two weakening lines approximately paral- 15 lel with each other and with the edge of the blank around that portion which is to iorm the outer wall of the rolled-up body, and with a cut through the part of the blank forming the inner wall and disposed'at a point nearer the edge of 2 the blank than the nearer of the weakening lines, such out being also approximately parallel with the edge of the blank, means being also provided to facilitate the separation of the inner end 01 the strip between the weakening lines and the 25 starting of the tearing out of such strip, as set forth.

7. A double-walled conical paper container provided with means for opening same comprising two rows of weakening lines extending 30 around the outer wall only to enable the strip between them to be entirely removed, exposing the inner wall in which a cut is made extending right round same. and located nearer the edge ot the blank than said weakening lines so that the separated top with the end closure secured therein can be removed and subsequently used as a cover, as set forth.

8. A double-walled conical paper container provided with means for opening same comprising two rows oi weakening lines arranged approximately parallel with the edge of the blank from which the container body is made but extending around the outer wall only, to enable the provided with means for opening same comprising two rows of weakening lines extending around the outer wall only, a out between the outer ends of the weakening lines to form a tab, a cross out between the inner ends of the weakening lines,- and a cut extending around the inner wall and located nearer the edge of the blank than said weakening linesas set forth.

CLIFFORD LANQASTER MARSHALL.

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