US1740966A - of fulton - Google Patents

Description

Dec. 24, 1929. w. L. wRlGHT 1,740,966

TAPERED PAPER CONTAINER Filed June 27. 1928 lllllllglglll/I,

Patented Dec. 24, 1929 UNITED STATES PATENT OFFICE WILBUR L; WRIGHT, OFVFULTON, NEW YORK, ASSIGNOR TO OSWEGO FALLS CORPORA- TION, 0F FULTON, NEW YORK, .A CORPORATION 0F YORK T APEREI) PAER CONTAINER Application filed' June 27,

The essential purpose of this invention is to render more certain the liquid tight qualities of the bottom closures of paper containers, particularly those of tapered or so-called conical form, and tofso form the container bottom and bottom closure as to stiffen and strengthen the same against blows or pressure tending to so distort or deform the con-A tainer as to destroy or partially destroy the liquid tight qualities of the joint between the container body and its bottom closure, and those skilled in the art will readily understand the purpose and object of the invention in t-he light of the following explanations of the accompanying drawings-that illustrate what I now believe to be `the preferred mechanical expressions or embodiments of my invention from among other forms within the spirit and scope thereof..

Viith lthe foregoing and other objects in view my invention consists in certain novel features and cooperating formations and elements as more particularly described and specified hereinafter. y Y

Referring to the accompanying drawings forming part hereof Fig. l shows in part an upwardlyfconvergh ing tapered mandrel anda plunger in side elevation, and the small end portion of a tapered paper container barrel or body and a smooth-cut oversize inner sti paper disk vertical section, the upper end of the barrel being expanded and the disk seated against an annular ledgek in thev barrelby the plunger after being ldriven through saidk end by the plunger. Y p

Fig. 2 is a similar view with the exception that an oversize annularly-flanged. outer paper disk is shown in vertical section driven by the plunger through the expanded end and tightly pressed against. the inner disk.

Fig. 3 shows lthe mandrel in side elevation, and in vertical section shows the paper barrel and inner and outer disks and a rim forming and disk securing crimp, as well. as the crimping or spinning head in vertical section.

Fig. 4 shows a tapered or frustro-conical paper container or bottle embodying my invention and partially broken away, the paper container of this figure of the drawing show'- 1928. Serial No. 288,596.

ing the bottom closure inthe large end of the tapered barrel, whereas Fig. 3 shows the same in the small end of the paper barrel.

Fig. 5 is a detail vertical section of the structure of Fig. l on an enlarged scale.

The conical or tapered paper containers disclosed comprise a. paper barrel that is longitudinally tapered from a largerend toa small end. 'Y

, One end of this paper barrel vconstitutes the open top or mouth of the container, that is adapted to receive a removable closure.

The other end of the ypaper barrel is provided with a permanent bottom closure including an overlarge inside stiii:l smooth-cut disk 8, and an overlarge outside annularly hanged disk 4, and this bottom structure involves a rim-forming and bottom closuresecuring crimp, and a peculiar formation of the lower end of the paper barrel, all designed to render the container liquid tight at its lower end and to strengthen the bottom closure against damage tending to break the liquid tight joint'or seal.

The mouth of the container can be at either the large or small end of the tapered barrel and consequently the bottom closure can be at either the small or large end of said barrel. y y

The paper barrel l, of the container is pref* erably formed by a fiat blank of strong stiff f the required tapered form with the longitudi- Y nal edges of the blank overlapping and permanently sealed and secured together to form liquid tight longitudinal seam la, throughout the length of the tapered body.

The upper end of this tapered body or barrel l, isl preferably formed to provide the container with a top rim and mouth usually either by applying a neck ring thereto to provide a seat for a removable closure, or by spinning or crimping the upper end of the body outwardly and downwardly, or other wise to provide a surrounding rim to receive a slip cover for theqcontainer.

The battom end of the tapered barrel when first formed is overlong, see 1C.v This open method of bottoming the same, is forcibly enlarged in diameter from its large extremity inwardly a suitable distance longitudinally towards the opposite end of the barrel, by outwardly stretching` and expanding the sheet paper to approximately cylindrical form of enlarged diameter. By thus expanding tie tapered barrel ond, an annular outwardly facing` intermediate internal ledge'vor shoulder 2, is formed in the barrell connecting the eX- panded end of the barrel and the undisturbed tapered portion thereof of relatively reduced diameter. A. stiff strongusually heavy iinperforate paper or like fibrous material disk 3, of enlarged diameter with respect to said tapered portion of the barrel and said ledge is driven longitudinally into the barrel through said bottom end while held in a position transversely of and at right angles to the longitudinal axis of the tapered body and while backed by the driving plunger throughout the area of the outer surface of the disk, and this disk is thus driven in and forcibly sealed against-said ledge or shoulder with the annularportion of the inner side face of the disk tightly fitting the ledge and the peripheral edge of the disk tightly fitting the inner surrounding surface of the enlarged end of the barrel where `it merges into the ledge, all to form a tight'seal.

Theessential characteristic of this stiff flat or slightly dished disk 3, is its smoth-cut cylindrical Vperipheral smootlnsurface' edge 3a. This smooth-surface surrounding cylindrical edge of the oversize stiff or heavy disk performs a peculiarly advantageous,function in that it establishes a liquidtight joint by its intimate tight Contact with the surrounding inner surface of the expanded end of the paper body or barrel in cooperation with the annularliquid tight seal or joint established byand'between the enlarged annular ledge and the inner sideface of the disk, and this last mentioned jointis concentric with 'and continues inwardly toward the interior of the container from the tight jointor seal at the smooth peripheral edge-of the disk. This smooth cut disk also cooperates with other features and the flanged disk 4, jin establishf ing` `a liquid tight bottom and in stiftening and strengthening the bottom structure.`

The outer disk 4, is preferably struck up from more or less thin flexible sheet paper material to provide the `disk with an annular depending skirt or flange 4a. This disk 4, is imperforate and its exterior diameter. in the plane of vthe flat body portion of the disk, is as `near'as possible the same as the exterior diameter of the heavy inner disk 3. This flanged disk 4l, is also driven into the expanded bottom end of the otherwise tapered container barrel preferably by a plunger that maintains the flat body of the disk in a plane perpendicular to the longitudinal axis of the body, While contacting or backing the flat center or body of said disk throughout the area of outer side. The flanged disk '-.vith its flange directed outwardly and preferably tightly held surrounding the driving` plunger, is thus forced and driven into the container body end and forcibly pressed and seated against and into parallelism with the outer face of the disk 3, and the two disks :are thus forced toward the ledge 2, against which the disk 3, is seated under comparatively henny pressure.

The' forcing plunger is then removed, learing the tivo tightly engaging parallel disks swaged into the container body end that is expanded thereby with the disk il, tight against the ledge 2, and the flange fitting tightly within and concentric with the outer expanded ond of the body, and preferably terminating short thereof.

Thereupon, the projecting expanded end of the body with the flange Ll", therein, is turned, rolled or crimped inwardly and downwardly and subjected to inward lonejitiulinul pressure, forming` preiferably locked. crimp 5, to permanently look and hold the two disks and ledge, drawn tightly together and the expanded wall of the container' body drawn radially in tightly against the smooth cylindrical edge of disk 3, and against the outer surface of disk ALl, and its flange l". to thus iinmovably support said disks and secure the disks and container body iizredly together. This` multi-ply crimp 5, also provides the container with a stiflening strengthening aunular depending rim, wherebyv the bottoni disks are inset within the container body. and thisrim is not only depending but forms the lower end of the body with a surroiuidiim' annular approximately eXteriorly-cyl i ud rical stiff rigid'enlarged rim 5, by reason of the two overlarge interior parallel disks 3, 4, and the expanded body end surrouiuliim74 said disks and turned in and up against the bottom of the flanged disk and holdingl the saine and the inner disk tightly against and longitudinally immovable with respect to ledge Q.

This stiffI strong enlarged diameter surrounding and depending bottom rini serves to strengthen the lower end of the container aga-inst distortion and indenting under handling by blows and pressures, that might otherwise tend to separato or break the liquid tight joints or seals between the disks :ind ledge 2, and the disks and surroiuidingi` expanded body wall. The barrel tapers up wardly from the ledge or shoulder 2. and this annular radially or outwardly projecting` shoulder 2, joins the tapered portion with the end rim of enlarged diameter, and this projecting rim serves to protect and ward oif pressures and blows that might otherwise distort the shoulder portion of the barrel or the 4bottom disks and result in breakingl the waterproofing and joint sealing` fillet or filling a, of paraffin or other sealing substance.

Such sealing material in melted liquid form is usually introduced into the bottomed container to enter and harden in and seal the annular joint where the top disk lits under the ledge 2, the surplus melted paraffin being poured from the container. This fillet when hard and cool is brittle and liable to become broken and dislodged by distortion or bending of the container body or disks, hence the advantage gained by the formation and structure which reduces to the minimum possibility of such distortion. However, it is not the intention to limit all features of the invention to the presence of such oint sealing deposit or fillet, inasmuch that the presence of the smooth cut inner disk in cooperation with the flanged outer disk, the annular enlarged ledge or shoulder and the inner surface of the expanded barrel end, establish a liquid tight seal that avoids the necessity of the waterproofing seal a, possibly except as a factor of precautionary protection.

I have found that it is almost impossible to produce a flanged paper board disk, such as 4, wherein the outer surface of the flange is uniformly smooth and without longitudinal channels or creases that tend to promote liquid seepage from the interior of the container by capillary action or otherwise even where the flanged disk is overlarge and locked in the expanded end of the paper barrel and seated directly against an annular internal ledge formed in the body by the body expanding operation. Hence, the desirability of employing` the seal a, for the annular oint within the container between the shoulder and top surface of the flanged disk. I have discovered however that this difficulty caused by the outer surface of the flanged disk is overcome, and certain other advantages are gained, by employing the smooth-cut stiff lnon-flanged inner disk, in the combination, as

hereinbefore described, firmly locked between the shoulder 2, and the flanged disk.

In the example shown, the tapered paper barrel, in the form shown by Figs. 1 to 3, is placed on a correspondingly tapered mandrel 10, having an upper end reduced in diameter, and having a Hat top die face. The overlong upper end of the barrel 1, projects upwardly beyond this mandrel. The projecting upper end of the paper body can be expanded and contracted to form the ledge 2, and the upper end of enlarged diameter, by suitable mechanism, or the barrel end might be expanded by driving in the various disks by plungers, such as 11, and 11a, as shown, or otherwise. The plungers 11, 11, are flat and horizontal at their working faces to back and support the disks throughout their areas and thus support and drive the same as hereinbefore described, and if so desired said working faces can be rounded or convexed to convex the disks 3, 4, toward the interior of the body by the drag of the edge portions of the disks on the inner surfaces of the paper barrel. The disks will thus be seated and secured in dished inwardly convexed form under constant tension to return to flat form of enlarged diameter with the edge of the disks thus held under tension bearing radially outwardly against the surrounding wall of the paper barrel. In Fig. 3, a crimping or spinning head 12, is shown pressing the two disks tightly together and against the end die face of the mandrel and against the ledge 2, and ironing out the outer approximately cylindrical face of the enlarged` rim portion 5a, while completing the tight crimp 5, and exerting downward pressure thereon.

What I claim is 1. A container embodying a longitudinally tapered sheet paper material body at one end portion expanded to an enlarged diameter and thereby forming an annular enlargeddiameter internal ledge joining the expanded portion with the tapered portion of the body; a stili imperforate flat-cut paper material disk driven longitudinally through said enlarged end and tightly pressed against said ledge; a flanged paper material disk driven longitudinally through said expanded body end against said first mentioned disk; and a disk locking and supporting crimp between the expanded body end and the flanged disk, whereby the smooth-cut disk is held in against the ledge and the expanded body end is drawn radially and annularly inwardly into liquid tight engagement with the peripheral portions of the two disks.

2. A container embodying a paper material body expanded at one end to provide an interior annular ledge; an inner stili" oversize smooth-cut bottom disk driven through said expanded end tightly against said shoulder; an oversize annularly flanged outer paper disk driven through said expanded end tightly against said inner disk; the expanded end of the body being crimped over the flange of the disk and against the flanged disk to lock the disks together and against said ledge and to form the container with a surrounding stiff enlarged rim and a depending bottom rim.

3. A container embodying a longitudinally tapered paper body at its bottom end portion having an internal annular ledge; a smooth-cut stiE inner bottom disk driven through said end and seated at its inner side face against said ledge with the cylindrical peripheral edge of said disk in tight sealing engagement with the surrounding inner surface of the body.; an annularly-flanged outer bottom disk driven into said body end tightly against said inner disk; and a disk locking crimp forming the container with a bottom seal protecting stiffening annular rim.

Signed at Fulton, county of Oswego, State of New York, this 25th day of J une, 1928.

WILBUR L. WRIGHT.

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