Dec. 17, -1946.l - D,¢„G,LES , ’ 2,412,576 >SPÍERALLY WOUND BARREL CLOSURE Filed Sept, 22, 1945 / ATTOQNEYS. Patented Dec. l?, 1946 2,412,576 UNITED STATES PATENT OFFICE 2,412,576 SPIRALLY WOUND BARREL CLOSURE Delos C. Giles, Oil City, Pa. Application September 22, 1943, Serial No. 503,390 4 Claims. (Cl. 217-76) 1 2 This invention relates to improvements in clos ures and methods for the production thereof. The invention Vhas for its object the provision of a simple and inexpensive closure for barrels and the like, with an ideal section affording a maximum of strength in proportion to the ma terial used, and providing an increased thickness Figure 8 is a view partially in side elevation and partially in section, showing reenforcing applied radially to any one of the heads illustrated in Figures 4 to ’7. Like parts are identified bythe same referenceY characters throughout the several views. In order to explain my invention more ade quately I shall assume some'speciñc dimensions, of stock at the bung hole to assure a firm an it being understood that these` are stated merely chorage of the bung driven therein. More specifically, the invention contemplates 10 by Way of exempliñcation. Let it be assumed. that it is desired to make up a conventional bar the spiral winding about a core of a strip of pa rel head 13 inches in diameter, and >that it is per or the like of gradually tapering Width, start desired that the head be 1% of an inch thick ad ing at the end where the strip is widest, thus jacent its bung hole and 1/2 inch thick adjacent producing a barrel head or the like in the form of a disk which in any diametrical section will have its greatest thickness at the center and will thence taper in thickness toward its margins. As compared with any other closure, the device herein disclosed is less expensive, less subject to its peripheral margin. Depending somewhat apparatus to any desired size. As compared with a laminated paper head, the be equal to the sum of the respective widths of upon the thickness of the web of paper, cloth, cellulose acetate or other stock to be used, it may be assumed that the strip which will wind the completed closure to the specified dimensions corrosion, less subject to puncture and shock, 20 may perhaps be on the order of 70() feet long. It will be wound in a parent roll ’1, and its width, and will more readily receive a satisfactory coat in the preferred practice of the invention, may ing and may readily be made on one piece of the strip at its respective ends. In other words, method of construction herein disclosed saves 25 the web or strip of material making up the parent roll 'l may be 700 feet long and an inch and a material. There is no waste in my method, quarter in width. whereas in laminating a paper head from disk The strip passes between the guide rolls 8 and stock there is a minimum of 25 per cent waste. 9 and past a slitter assembly generically desig Moreover, the method herein disclosed is much simpler and results in a stronger product in pro 30 nated by reference character l0, and past the adhesive rolls Il and l2 and is wound upon a portion to the weight. In relatively large closures the saving in weight becomes quite signiñcant. Other objects will be apparent to those skilled in the art upon analysis of the following dis closure of my invention. In the drawing: Figure 1 is a diagrammatic View, partially in side elevation and partially in section, illustrat ing the method of making a closure in accord mandrel l5, to which it is held by pressure roll I6. The slitter roll assembly may be constructed 35 in any one of a number of ways. Instead of a shear assembly, I have shown a pinch knife slit ter in Figure 3 purely by way of illustration. Co operating with a hardened die roll at I1 is a ro tary knife I 8 mounted on shaft i9 for axial move ance with this invention. 40 ment as determined by the spool 20 on shaft. I9 and a lever 2l engaging in such spool and urged Figure 2 is a plan view of the apparatusshown by a cam 22 against spring 23. Mounted in fixed in Figure 1. bearings at either side of the knife are pressure Figure 3 is an enlarged detail View taken in rolls 24 and 25 holding the margins of the web section on the line 3_3 of Figure 2. 30 tightly upon the die roll Il. Y Figure 4 is an enlarged diametrical section through the completed closure. The roll 8 is mounted on a vshaft 3| which, through a speed reducer 32, drives the cam 22. Figure 5 is an enlarged diametrical section through a secondary roll formed as an incident Thus, as the web passes beneath roll 8 the slit ting knife lßis caused to gradually move laterally to the construction of the closure shown in Fig ure 4. of the path of the web across the gap between the stationary pressure rolls 24 and 25 to produce Figure 6 is a view in diametrical section show an elongated diagonal cut separating the web 30 ing a modified embodiment, with one plane face. Figure 7 is a View in diametrical section show into two webs 35 and 36. Web 3B passes directly from the die roll Il to ing a modiñed embodiment, with two curvilinear 55 a new parent roll 31 wound upon mandrel 38. faces. 2,412,576 4 3 Only web 35 passes through the adhesive appa ratus, being coated with adhesive delivered there to from tank I4 by rolls I3 and I2 so that as web 35 is wound spirally about mandrel I5 it will adhere to previously wound convolutions upon the mandrel to make up closure 45, which is the ul timate objective of the invention. Starting with the assumed web dimensions on the parent roll 1, and assuming the knife I8 to be initially at its extreme right hand position, as viewed in Figure 3, it will be apparent that the di vided web 3S wound on mandrel 38 will be ver-y narrow adjacent the mandrel, as is indicated at 4I in Figures 4 and 5 are heated. Shellac, and most of the thermo-setting plastics may be used in this manner to make unnecessary the application of adhesive to the webs en route to the respective rolls.While paper is the preferred material to be used in accordance with this invention, it will be apparent to those skilled in the art that thin flexible webs of fabric and plastics, and other materials may be used. Assuming that the mate rial used is fibrous and porous, as are paper and fabrics and some plastics, it will be apparent that the closure, either in the process of manufacture in Figure 5. The divided web 35, on the other or following the completion of manufacture, may be impregnated as desired to give it any appro hand, will have its greatest width close to the man priate finish or to make it proof against water drel I5, as is indicated at 42 in Figure 4. The With or other liquid. drawal of the mandrel will leave at 42 a bung receiving opening at which the closure 40 will Due to its “beam section” the resulting closure is_ extremely strong, even Without reenforcement, have its greatest thickness, and from which it Will taper from a central thickness of 3A of an inch 20 and may readily be made as thick as desired at the center or periphery without any waste of tov a marginal thickness of 1/2 an inch at 43. paper stock or any unnecessary waste. The thick The divided web 3B is not Wasted when wound into the new parent roll 3‘I but may be passed ness at the center or the periphery may be varied through apparatus identical with that shown in Figure 1 (save for the absence of- the slitting roll) to Wind another closure which will then be iden tical With that shown in Figure 4. Re-winding either for the purpose of changing its strength characteristics or increasing the length of the bung hole. For a given strength of closure it is estimated that by means of the present inven is easy because no adhesive is used in making up tion I am able to save about 20 percent in weight the roll shown in Figure 5. and about 25 percent in material as compared However, the roll shown in Figure 5 may> like 30 with any other structure or method, the saving Wise constitute a closure, if adhesively treated in expense being even greater in most instances. to unite the several convolutions of the spirally No claim is made in the present application for wound web. the apparatus herein disclosed. I claim: For some purposes it may be desirable that the closure should have its maximum thickness at its 1. A barrel head or the like comprising a clo outer periphery instead of its inner periphery, and sure of generaly circular contour and of tapering the invention contemplates the construction of thickness from a central portion to a peripheral such a closure as shown at 31. , By manipulating the Winding operation, con portion thereof, said closure comprising a spi rally extending strip having its successive con volutions bonded unitarily to each other and ‘ducting it against a form, or deforming thewound roll before its convolutions are set in unitary progressively advancing helically whereby said assembly, any desired conformation may be pro closure is of conventional form, its outer and in duced. The embodiment 45 shown in Figure 6 ner faces being arcuate. is identical with that shown in Figure 4 except 2. A barrel head or the like comprising a paper that one side is fiat. The embodiment 4U shown 45 strip of substantially continuously varying Width in Figure 7 is made from the same tapered strip wound spirally in convolutions, successive con but is convexly arched. ’ volutions being unitarily adherent to each other, Any of the closures may be reenforced and greatly strengthened by inserting any type of and the resulting closure having a central open ing adjacent to which said strip has its maximum fastener 48, such as Wire nails. Hereinafter I use 50 width, said` closure tapering progressively to a the word “nail” generically to include equivalent minimum section adjacent its periphery. devices, whether threaded or not. The nails pref 3. The device of claim 2 in which the convo erably extend radially, and from the outer pe lutions of the strip are impregnated, the impreg ripheries of the closures, as shown in Figure 8. nation providing the adherence between such The nails may be driven into the barrel head or. convolutions. closure during its manufacture, or may enter the 4. A barrel head or the like comprising a thin . head through the barrel in which the headA is annulus having a central opening and composed mounted for use. substantially entirely of a ribbon of progressiVely It will be understood that any of the rolls varying width extending in aV continuous spiral shown may have their spirally, wound convolu 60 from said opening to the outer periphery of the tions united by adhesive with which they may be annulus and provided with adhesive means bond impregnated after being wound as rolls, the ap-` ing successive convolutions unitarily to consti paratus comprising rolls II , I2, I3 and glue pot tute a head progressively varying in thickness I4 being omitted in such cases. Or the web stock from said opening to said outer periphery, the supplied from roll ‘I may already be impregnated opposing faces of said annulus having a shallow with a substance such that it will unite the sev eral convolutions when the rolls Wound» as shown ' taper frusto-conically. DELOS C. GILES.