US1427683A - Closure - Google Patents

Description

CLOSURE rmcmon FILED APR. 5, me.

Patented Aug. 29, 1922.

arate spot on the bod llttVlllQ the pitch ot the ordinar .l e. L

i i i'l'ilihl'l' EUGENE L. GREENEVIALD, OF \VASHINGTON, DISTRICT OF COLUIVIBIA.

CLOSURE.

Application filed April 5,

yices such as cans.

l he principal object of my invention is to provide a two-piece threaded closure made from sheet metal and undrawn, as distinguished from those closures made of one piece and drawn from a flat blank. Dray ling the metal blanks so as to produce a satisfactory one-yic e closure is an expensive operation. The metal in such cases is stretched and it is not practicable .0 lacquer or decorate the metal in the int since the drawingwould distort the decoration.

Another object of the invention to form a flangedv tubular ,body in anovel manner, without drawing the metal, and to simultaneously thread the body.

Still anotherobject relates to the means whereby the cover part of. the closure is secured to the body part.

'1' 'ijirther important obyect is to form an interrupted or mutilated thread or cover on agingmez ns on the body by indenting po. ons of the body which are only of a si thickness of metal. The body, made ,rom a blank rolled intotubular form and liming i s coextr edges secured tonether, is at least-oi? double thickness at the seam, where the o'wrlappiing edges are sol dercd. or welded to""the':, and wher these edges are secured to .;her by an int lded or lock seainpthe overlapping parts are of tour thickne." My object is to avoid roll i'ng over these thick porfl, of the body, which. strains the screw threading machine and thelacquer or decoration is also marred at the seam.

By forming a helical series of inward sen indentations or a series of beads screw thread on bottieor jar, I overcome these objections and produce a satisfactory. att ching means on the closure. These beads or indentations may be termed in the fiat Specification of Letters Patent. Patented ring. 29, 1922.

1916. Serial No. 89,078.

blank when the same is cut from the sheet or before it is rolled into cylindrical form.

The above and other objects and novel features of my invention will appear from the following description taken with the drawing in which Figure 1 is a view of a closure embodying my inv .ition, partly in side view and partly in section;

Figure 2 closure on the line 2-2 of Figure 1;

Figures 3 and d are plan views of two similar forms of blanks from which, maybe formed closure bodies;

Figure 5 is a perspective View of a tubular body formed tronra fiat blank;

Figures 6 and 7 are views illustrating the.

method of flanging and threadingthe tubular body;

Figure 8 is a sectional view showing a.

flanged body part with the cover part assembled thereon;

Fig. 9 is a view of another closure embodying my invention.

Referring to the drawing, designates the tubular body part of a closure adapted for use on ketchup bottles, etc. This tubular body is formed from a flat substantially rec-- tangular blank of sheetmetal havingcut out portions at the ends thereof and if desired may be lacquered ordecorated inthe flat. The Hat blank is rolled into tubular form as shown in Figure 5, the coextensive longitudinal edges of the tubular blanl-rbeing secured together by an intertolded seam 16,

in the usual manner. The adjacent overlapping edges of the tubular blankmay also be seamed together by soldering or welding. The seam 16 is disposed wholly within the margin ot the tubular body, in other words, the outer surface at the seam or joint is smooth and flush with the outside of the,

body. As shown in r lgure 8, the body is provided with an exterior flange or shoulder 17 atits upper end, and an outer depression 18 is formed below the flange. The depression 18 is within the margin of the main body portion below it, and the peripheral edge of the flange 17 terminates at or within the marginal outline of the main body portion 15.

In order to form the flange 17 and depression 18'the tubularbody t, as shown in Figures 6 and 7, isfit-ted onto the inner mandrel or die M, and restson the surface m thereof, The upper end of the mandrel is a transverse section of the has an inwardly extending curved seat 2i. which is provided with corrugations posed in planes radial to the axis of the die. Below the seat 21 the die M is provided with a spiral groove which extends downwardly to the surface in. The member if the bottom half of the interior forming die, the upper half h resting against the top of the tie and the members M and M abutting along the line The die member M is provided with a seen 25 the surface of which merges into the seat 21. The tube t is iitted over the two members M and M as shown in Figure 6 and in order to press the thread into the body I provide a member which is made in halves consisting of the parts 26 and 2. which are provided with interrupted ribs 28 on the interior thereof conforming in in itch to the thread 23. The interrupted ribs 28 press portions of the tube iinto the spiral groove 28 when they move inwardly, but are located so as to only form threads 30 in that portion of the tube which is of a single thickness. I have found that by having the threads interrupted they can be positioned so as not to extend across the side seam 16 which is of two or more thicknesses. This is important since in the manufacture of the closure it is much more diflicult to thread on two or more overlapping thicknesses of metal than of a single thickness and where it is necessary to carry on the operation rapidly, as in an automatic machine, this dih'iculty is of considerable importance. Moreover in making closures having threads extending across the seam it is necessary to apply considerably more force to the material at the seam and this causes the material at one side of the seam to be raised or projected above one side of the body of the closure. This raised part or projecting edge is troublesome when the cap is aoplied by capping machines, as the body of the cap is then not a true cylinder. Furthermore the projecting part of the seam is unsightly and when in use the lacquer or coating on the cap quickly wears off at that point and this also *enders the cap unsightly. In the closures having side seams it is practically impossible on account of the stiffness and thickness of the overlapped parts at the seam to mal ce a deep tin-cad and this is sometimes desirable. In a closure'formed according to my inventiom it is possible to make the thread as deep as necessary. since the single thickness of nflaterial offers little resistance to the threading operation.

The flange 17 is formed by pressing the tubular body inwardly on the circumference below the upper end distance substantially equal to the width of the flange. The body is pressed radially inward at this section by a series of separate corrugating devices 3i which have noses 32 spaced apart a slight distance all the way around the body substantially tie same distance apart as the cr rugations on the scat 2-1, but staggered with respect thereto so t iat when the tube is pressed inwardly the metal will be bent and not drawn, since by the corruga ing operation the larger diameter is taken up by the corrugations. Simultaneously as the body is forced inwardly by the coriaigating members 81. the upper end of the tube above the groove formed by the seats and will flow inwardly and finally assumes a position at right angles to the axis of the tube and thus forms a flange at the upper end of the tube with its peripheral edge at or Within the margin of the tubular body t. The position of the parts when the members 26 and 27 have been moved in and also when the corrugators 31 have beenpressed in is shown in Figure 7. The tube in this position is provided with a flange, and a depression below the flange and is also provided with an interrupted thread and, since the spiral groove 23 on the die M is continuous to thetop of the die, the threaded tube zfmay be screwed off of the die after the top half ill of the die has been raised up out of the way of the flanged end tube.

In Figures 3 and 4 I have shown flat blanks 40 and ll from which the tubular bodies for the caps are made by rolling the blank into cylindrical form and securing the edges 42 thereof together preferably by an interfolded or locked seam as shown in Figure 2, but a lap or welded seam may also be used. The blank 40 shown in Figure 3 is provided with a series of indentations 45 which extends from the lower edge 43 upwardly an a -;le but terminates short of the upper edge 44. The indentations l5 are in a double row and on the proper angle to form a helical interrupted thread on the body when the same is formed into a tube and the edges 42 thereof are locked together. It will be seen that the indentations do not cross the parts of the tube which form the I seam. In Figure t the indentations e51 are considerably lengthened but the principle is the same as that shown in Figure 3. The indentations can be pressed into the decorated. or lacquered blank in the flat in the same operation in which the blank is cut. Therefore when the blank is formed into a tube it is already provided with asuitable thread, and need only be flanged by the arrangement shown in 6 and 7.

Referring to Figures 1 and 8 in particular the top part 4-? consists of a circular disclike member which may be stamped from sheet material and if desired may be provided with the groove 48 designed to center the top on the body, such groove having a surface or wall engaging or bearing against the inner surface of said body. The flat peripheral edge portion 49 of the top when the body and top are assembled as shown in Figure 8 is bent downwardly into the de'- I I pression i8 by simultaneously radially corrugating the superposed edges of the flange 17 and the part as of the tube; The corrugations 50 formed on the outer surface of the edge portion 49 oi. the tuberegister wlth the corrugations on the body formed by the seat 22 and fingers 31, as shown in Figural, and this corrugated edge provldes a grip whereby the cap may be readily screwed on top part being substantially flush with the body 15. It will be understood that the edge part4?) may be bentin any other manner desired so as to secure the top to the.

body.

In Fig. 9 I have shown a closure having a tubular body part 15 formed from the blanlrtO shown in Fig. 3, the inward indentations 45 provide means adjacent the open endotE the closure for coupling it: to acon" tainer such as a bottle or jar. As shown, he top 47 of the closure may besecuredto the body-1n the same'manner as in the closure shown in Fig. 1, or in any-other suitable manner.

It is to be understood. that while the body is still on the mandrelM the top of the cap may be assembled on the body andsecured thereto by a circular series of radial corrugatin fingers 63 or othermeans for bending down into the adjacent depression the contiguous edge portions of the body flange and top, after the top half M f the mandrel has been moved out of the way. The completed cap can then be readily removed from' the mandrel M.

ll hile I have shown and described the invention in detail I do not wish to be limited. to the exact forms as illustrated as it will be apparent that various changesmay be made in the forms illustrated without departing from the spirit of. the invention.

Having thus described the invention what is claimed is: i

1. A bottle or jar closure comprising a body having a thread at one end consisting of a helically extending series of spot beads, and a cover part secured to the other end of said body.

2. A bottle or jar closure comprising a tubular body having, a thread adjacent one end consisting of a helically extending row of separate spot indentations, and a cover part secured to and closing the other end of said body.

3. A closure comprising a tubular body formed from a sheet metal Iblanlr having a;-

row or series of indentations stamped therein andso arranged as to provide a helically extending, container-engaging means on the" body when said blank is formed into a tubular body, anda cover end of said body.

hA two-part bottle or jar closure cornprising a tubular body having a side seam consisting of overlapped interlocked por tions, said body also having a thread at one end thereof consisting of a helically extending row of inward indentations disposedclose together but being interrupted at said side seam, and a cover part secured to said body part.

5. Av bottle or jar closure comprising a body having a thread at one endconiprising a helically extending series of beads, and separately formed cover-part secured'to the other end of said body.

6. A closure ofthe class: described coniprisingatubular body havingan inward de pression adjacent its upper end, a cover par securedstoand closing the upper end of said body and having a .rim; portion extending outside said body into sa'id depression, and means adjacent theother end of saidbody for coupling it to a container;

7. The invention claimed'inzclaim 6 in which the rim'portion of said cover part is transversely corrugated.

i 8. A two-piece bottleonja-r olosureeconr prising a tubular body having a side seam consisting of overlapped parts of the blank from which the-body is formed, said body also having, an inward depression. adjacent one end, acover part secured to and closing said end of the body andhavinga rim'portlon extending outs1de=sa1dbody .intosaid depresslon, and an interrupted thread adjacent the other end of saidbodyfor couplingthe closure to a bottle or jar, said thread-be ing confined to that portion of v the body which is only of a singlethick'ness of mate rial.

9. A closure comprising a tubular body having an inwardly extending depression adjacent its upper end, acover secured to and closing the upperend/of said body, said cover'having a groove within its margin providing a wall having a surface bearing agalnst the inner surface of said body and also havingya rim portion extending: outside said body into said depression and means adjacent the'other end of said body for couplingit to a container.

10. A two-piece bottle orjar closure com prisinga tubular body havinga side seam consisting of overlapped parts of the blank from'which the body is formed, said body also having an inwardly extending annular depression 1n its-external surface adjacent its upper end, a cover secured to and closing the upper end of said body, said cover having an annular groove within its margin providing a wall. having a surface engaging the inner surface of said body and alsovhaving a rinr port on; d p sed: Ou side s d body and expart secured to one Cal tending into said depression, and an interrupted thread adjacent the other end of said body for coupling the closure to a bottle or jun-said thread being confined to that por tion of the body which is only of a single thickness of material.

11. A blank adapted for use in making bottle and a r closures, such blank comprising a substantially rectangular sheet of metal having cutout portions adjacent opposite ends of one of its longer edges, said. sheet also having a row of spaced indentations extending from adjacent the other longer edge and transversely of the blank at an angle to such edges, said indentations forming cor-- responding beads projecting from one face of said blank arranged to provide a helically extending container-engaging means on the closure formed from or comprising said blank. I I i 12. A blank adapted for use in making bottle and jar closures, such blank compris ing a substantially rectangular sheet having a row of spaced spot indentations extending from adjacent one of the longer edges of the blank transversely thereoi and at an angle to such ed e and arranged to provide a helically extending container-engaging means on the closure comprising said blank.

13. A closure of the class described com prising a tubular body having an inwardly extending depression adjacent its upper end and an exterior shoulder on the body at the upper end of said depression, means on the body for attaching the closure to a container, and a cover part having a rim portion projecting under and attached to said exterior shoulder and disposed within said depression.

tubular body formed from a flat blank having identations therein and having overlap ping parts secured together, a top part formed independently of the body and having its edge extending around the outer side of one end of said body and secured to said body, and aninterrupted thread at the other end of said body, said threadbeing formed by said lndentations and confined to that part of the body which. is only of a single thickness of metal.

15. A bottle or jar closure comprising a tubular body having a side seam consisting of overlapping parts of the blank from which the body is formed, said body'also having an exterior shoulder at its upper end within the marginal outline of said body, a

top part formed separately from the body and having its peripheral edge extending outside said body and beneath said shoulder, and an interrupted thread at the lower end or" said body, said thread being confined to the part of the body which is only of a single thickness of metal.

16. A bottle or jar closure comprising a 14. A bottle or jar'closure comprising a tubular body having a side seam consisting of overlapping parts of the blank from which the body is formed, said body also having an exterior shoulderat its upper end within the marginal outline of said body and a depression in which said shoulder is located, a top part formed separately from the body and having its peripheral edge extending outside said body, into said depression and beneath said shoulder, and means at the lower end of said body for attaching the cap to a container. 1

17. A bottle or jar closure comprising a tubular body having a side seam consisting of overlapping parts of the blank from which the body is formed, said body also having an exterior shoulder at its upper end, a top part formed separately from the body and having its peripheral edge radially corrugated and extending outside said body and beneath said shoulder, such radial corrugations serving as a gripping surface and an interrupted thread at the lower end of said body, said thread being confined to that part of the body which is only of one thickness of metal.

18. A bottle or jar closure comprising a tubular body having an inwardly extending depression at its upper end and also having an exterior shoulder at the upper end of the depression, a top part having its peripheral edge extending outside said body, beneath said shoulder and into said depres sion, whereby the margin of said top part will be substantially flush with the main part of th body below said depression, and

at the lower edge of the body for attaching the closure to a container.

i9. bottle or jar closure comprising a tubular body formed from a fiat blank and l a side seam consisting or" overlapping w s of the blank, said body having an inwardly extending depression at its upper end and also having an outwardly extending shoulder at the upper end of the depression, a top part formed separately from the body and having its peripheral edge radially corrugated and extending outside said body, beneath said shoulder and into said depression whereby the margin of said top will be roughened to provide a grip and will also be substantially flush with the main part of the body below said depression, and an interrupted thread at the lower end of said body, said thread being confined to that part of the body which is only of one thickness of metal.

20. A blank adapted for making a tubular closure body, said blank having a series or row of indentations extending thereacross adapted and arranged to provide helically extending container-engaging means on a tubular body formed from said blank.

21. A stamped flat metal blank adapted for'making atubular closure body, said blank having a series or row of spot indentations extending from adjacent one edge of the blank at an angle thereto across the blank, said series or row of indentations being adapted and arranged to provide an interrupted containerengaging thread on the body when the blank is formed into a tubular body.

22. A closure of the class described comprising a tubular body having a depression at one end extending inwardly within the outline of the rest of said body, said body also having an exterior shoulder thereon at the upper end 01": said depression, means on said body whereby the same may be attached to a container, and a cover part having a rim portion projecting under said exterior shoulder, said rim portion having transverse corrugations therein securing the cover part to the body part and also serving as a rough portion whereby the closure may be firmly gripped in attaching it to and detaching it from a container.

23. A blank adapted for use in making closures, such blank having a row of spaced spot indentations extending angularly from adjacent one edge thereof and arranged to provide a helically extending container-engaging means on the closure formed from or comprising said blank.

24. A closure comprising a tubular body having an annular external depression at its upper end, a cover part secured to and closing the upper end of said body and having a rim portion extending around the outside or" said body and disposed in said depression, and means adjacent the other end of said body for coupling said closure to a container.

25. The invention claimed in claim 24 in which said rim portion is transversely corrugated.

26. The invention claimed in claim 24 in which said body and said rim portion have interfitting corrugations.

27. The invention claimed in claim 2& in which said coupling means is entirely inside said body.

In testimony whereof I affix my signature.

EUGENE L. GREENEWALD.

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