US2236140A - Crimping tool for dynamite cartridges - Google Patents

Description

March 25, 1941. qc KA L, 2236140 I camrme TOOL Fox mrimurm CARTRIDGES Filed Jan. sj 'lsse FIG-4 FIG.'5 FIGS 7 INVENTOR CHgliLES S. KALEEL ATTORNEY Patented Mar. 25, 1941 UNI ED 2,236,1-fiii CRIMPING 'roor. FOR mm r i z CARTRIDGES Charles s. Kaleel, Wilmington, Del., assignor a Hercules Powder Company, Wilmington, Del, a corporation of Delaware Application January 5, 1939, Serial No. 249,403

2 Claims.

This invention relates to a crimping device for closing the ends of a paper cartridge and more particularly to an improved crimping tool for use in closing the ends of paper dynamite cartridges.

At present dynamite cartridges are manufactured by forming a hollow paper cylinder of the desired diameter and length and closing one end by folding a portion of the cylinders side wall across the end. To complete the cartridge, after charging it with dynamite, the remaining open end is also closed by folding a portion of the cylinders side wall across the end. This method gives fairly satisfactory resultsin regard to tightness of the end closure, ease of waterproofing the cartridge, and rigidity of the finished article if the cartridge diameter is small, for example, under two inches, However, the dynamite cartridges having a diameter greater than two inches do not lend themselves readily to eflicient closing by 0 the folding method. This difliculty of efficiently closing the end of large diameter cartridges is due to the greater amount of paper folded across the ends of the cartridge. The folds of paper produce a bulky closure that is not rigid or tight and therefore presents a cartridge that is very hard to waterproof.

It is the object of this invention to provide a means of closing the ends of dynamite cartridges in a manner that will produce a cartridge of improved water resistance. A further object of this invention is to provide a tool that will close the ends of dynamite cartridges in a manner that will give a rigid construction to the cartridge. A still further object of this invention is to provide a means of forming a spiral bead joint between a paper'cylinder dynamite cartridge and a paper cup end insert. Further objects will appear hereinafter.

Now in accordance with this invention, I have found that by the use of an especially designed and novel crimping tool I may curl two layers of paper together in a manner that forms a very tight spiral bead joint. Therefore, in accordance with this invention I have produced a dynamite cartridge by inserting a shallow paper cup within the end of a cylinder of paper and forming a bead joint between the two by the use of my improved crimping tool. The bead joint so formed provides the cartridge with a rigid end that is easily waterproofed. Further, the entire formation of the bead joint between the paper cup and the paper cylinder is performed by the crimping tool of this invention, quickly and in one simple and eflicient operation.

the crimping tool.

Figure 6 shows a dynamite cartridge consisting of a paper cylinder into which is positioned a shallow paper cup preparatory to crimping.

Figure 7 shows the dynamite cartridge of Figure 6 after the paper cylinder and paper cup have been crimped together in accordance with this invention.

Figure 8 is an enlarged perspective view of that section of the die member, Figure 4, below line BB.

A complete description of the construction and operation of my crimping tool may be understood by referring to Figures 1 and 2 of the drawing in which:

The screw thread I provides a means of attaching the tool into an adapter that may be fitted into a horizontal or vertical revolving medium. The tool shown in the drawing contains an annular groove 2 that serves to lighten the tool and causes a more even distribution of the stress between the adapter and the tool. The hole 3 is provided to receive a pin that may be used to tighten or loosen the tool on the adapter. The tool may be keyed in any suitable manner to the adapter to allow revolving in either direction. It is to be understood that other suitable methods are contemplated for attaching the tool to the adapter such as for example bolting or keying.

The size of the crimping tool is dependent on the size of the dynamite cartridge to be crimped. The relation between tool and the cartridge lies in dimension 4 which dimension approximately equals the outside diameter of the dynamite cartridge that is to be crimped.

The crimping tool contains a bead-forming concavity 5 cut concentrically with thread I in a manner that leaves a small hook 6, this hook 6 acts as a guide in the formation of the crimp bead. The bead-forming concavity 5, further, contains a plurality of specially cut slots 1 into which are fitted die members 8 that are radially movable. The construction of these die members 8 is shown in detail in Figures 3, 4, and 5 and includes an elongated hole 9 that allows radial adbead-forming concavity in shape but is further rounded at the edges as is indicated by the line I2, and by Figure 8 which is a perspective view of the die 8. This method of rounding the edges of the concavity H prevents the cartridge on which the die members torn. It will be noted have the concavity I l struction feature allows the crimping toolto be revolved in either direction with equally good results. a v The successful operation of the crimping'tool of this invention depends upon the die members 8 and their radial adjustment- These die members 8 are so adjusted outwardfrom .the' beadforming concavity 5 that they exert ari, uninterrupted drag on the paper dynamite cartridge and this drag causes the formation of a spiral bead joint between the paper cylinderandithe paper cup insert. The actionof the crimping tool in forming the spiral bead jointfis diagrammatically shown in Figures 6 and 'I and said tool operates as follows: i

The paper cup I3 is inserted in the paper cylinder l4 and held in such a position thatjthe distance i5 is approximately equal to the depth of the cup l3; the crimping tool while revolving is brought into contact with paper cylinder l4 containing the paper cup insert i3 and the action of the dies 8 and the bead-formin'g conform an interlocking spiral beadili insert 13 and the paper cavity 5 between the paper cup cylinder l4. rigid joint that may be easily waterproofed;

A specific example of the operation of a crimping tool in accordance with my invention may be made with reference to the closing of the end of a dynamite cartridge 4" in diameter,

but it will be understood that this'is but one exemplification of my invention and that cartridges of various diameters, for example, from about 2" to about 7 /2, may be effectively closed by similar crimping tools prepared .in accordance with this invention.

Now'to prepare a 4" outside diameter dyna- I v crimpinghead: is? thei- 'possibility .c' of producing mite cartridge a paper cup insert about deep is positioned, by the use of a mandrel,fwithin a 4" diameter paper cylinder so that the amount of the paper cylinder extending'aboveth'e edge of the paper cup is about'%" or approximately equal to the depth ofthe cup. "The crimping tool and cartridge are brought together 'by' suitable means, for example, or cartridge or by moving cartridge. When the crimping'tool 1000 R. P. M. but preferably within therange is also closed, by the crimping head oft this invention, in the manner described-above with the exception that the explosive itself acts as a 8- are acting from being k that the die members} rounded on both edges, in dicated by line 12 and by Figure 8, which-.con-

v =lappedz-jointfl-Thisoverlapped bead does not "having fidiarneter's This spiral bead I6 is a tight and v H "about 0.06"

by moving the tool both the 'too1- and' is brought into contact with the cartridge it. may be 'revolving within the range of'about 100 toabout' vention.-- of about 550 to about 650 R. P. M. The"action of the die members turns-the paper cylinder over.-

Afteri'illing the car- 7 t t 1 I mandrel to hold the paper cup insert in position. It will be understood that the cartridge or parts thereof may be treated in any desirable manner such as, for example, labeling, printing, or waterproofing, at any time during or after the crimping operation.

The die members controlthefprmation of the spiral beadand will by proper 'rafdial adjustment produce a small tight bead or a'l'arge loose bead. vIt is to be noted that if the die members are positioned so that they coincide exactly with the bead-forming concavity of the crimping tool; the resulting bead formed will not consist,

of; aspiral but vvil-l .consist of a simple overpresent the rigidity obtained by a spiral bead and furtheris much more diiiicult to effectively and prefer toadjustthe dies outward from the bead formingcon'ca about fan inch, as

7 this distanceturns bead ri er-l ly tight "to make a rigidc y editable a'ppearance tha "l atei'proof.

inches respectively "mp ngc too :of

'I 8 sucee ni1 y-erimp dynamitebs'eartridges' made of paper bet'we thickness.

the l diameter 0mm bead-forming concavity; :and the adjustment ofthedie members forming concavity and adjustment;ofqthegdie members for various thi'cknessyriof-r-spape ay 1 best -be determinedexperimentally.5; v 1- An' advantage: resulting. from: thisginve ntion v and dueto the' splral beadaiformedgbyr he hee forming I concavity. and dieaqmembers of the dynamite cartridges-that have ."aem'uch superior of the cartridges and subsequent spilling, -i the I dynamite from the cartridge ascondition that is orten' e eoumered while handling'zand remi porting cartridges having' ends closed; by

'foldingL A still further advantageigis thee-imfprov'ed" appearancebf thei calftrid'ges.

It .will be. understoodsthat the taiisiandiex arnple's giv e'n hereinbefore' ar'e'zillustrative; ,only and in no way llmiting dnmy inventionjafsbroadly described- :hereinbefore and irivthe appended What- Iclairn and desiiie t '1'. In 'ardevicefiorspirally-inter 5th of a cylindrical paper icartridge adapted,to; contain an explosive with the flange of a paper cup end-insert, the combination of a revoluble about Z005i'f sand i I If the aper? to zbe' "used is cut-side the abov'e range'wof -thickness. I may obtain suc'eessful crimpingnwby varying v z'rne;.a u l. optimum 'c'onditioii's ofr 'diameter ,ofathe ebefl crimping tool which has an annular concavity shaped to provide a downwardly and outwardly extending hook-like portion for vreceiving and rolling the said wall inwardly and over the flange of the said end-insert, whereby said wall and flange are rolled into a spiral and a plurality of turning dies eachhaving a concavity conforming in shape to the annular concavity of said crimping tool positioned circumierentially about said annular concavity.

2. In a device for spirally interlocking the wall of a cylindrical paper cartridge adapted to contain an explosive with the flange of a paper cup end-insert, the combination of a revoluble CHARLES S. KALEEL.

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