US3185092A - Explosive container with yieldable seal - Google Patents

Explosive container with yieldable seal Download PDF

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Publication number
US3185092A
US3185092A US337090A US33709064A US3185092A US 3185092 A US3185092 A US 3185092A US 337090 A US337090 A US 337090A US 33709064 A US33709064 A US 33709064A US 3185092 A US3185092 A US 3185092A
Authority
US
United States
Prior art keywords
container
explosive
coupling
containers
male
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US337090A
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English (en)
Inventor
John F Hamilton
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hercules Powder Co
Original Assignee
Hercules Powder Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hercules Powder Co filed Critical Hercules Powder Co
Priority to US337089A priority Critical patent/US3186340A/en
Priority to US336955A priority patent/US3185091A/en
Priority to US337090A priority patent/US3185092A/en
Priority to GB53081/64A priority patent/GB1031129A/en
Priority to FR45465A priority patent/FR1426427A/fr
Priority to BE658015D priority patent/BE658015A/xx
Priority to ES0307958A priority patent/ES307958A1/es
Priority to DE19651446960 priority patent/DE1446960A1/de
Priority to NL6500284A priority patent/NL6500284A/xx
Application granted granted Critical
Publication of US3185092A publication Critical patent/US3185092A/en
Priority to US577448A priority patent/US3395642A/en
Priority to US577211A priority patent/US3376816A/en
Priority to ES344711A priority patent/ES344711A2/es
Priority to FR49087A priority patent/FR94118E/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B3/00—Blasting cartridges, i.e. case and explosive
    • F42B3/02—Blasting cartridges, i.e. case and explosive adapted to be united into assemblies

Definitions

  • the present invention comprises an explosive column assembly having a plurality of substantially cylindrical blown plastic containers charged with explosive, each of said container having a threaded male coupling and end closure at one end and a threaded female coupling and yieldable seal adjacent the explosive at the other end, and said containers being threadedly interconnected by said male and female couplings and having the end closures of the male couplings exerting cornpressive force on the yieldable seals and adjacent explosive of the female couplings.
  • a container for explosives adapted for interconnection with like containers to form an explosive column assembly, which comprises a thin-wall elongated substantially cylindrical blown plastic container having explosive disposed therein throughout the major length of the container and having a yieldable seal within the container adjacent the explosive, an externally threaded male coupling and end closure in the thin wall on one end of the container, an internally threaded female cou- 3,185,92 Fatented May 25, 1965 pling in the thin wall on the other end of the container, the female coupling extending beyond the yieldable seal the remaining length of the container, and the male coupling having a reduced external diameter relative to the internal diameter of the female coupling whereby like containers of explosive may be threadedly interconnected by the male and female couplings to form an explosive column assembly having the end closures of the male couplings exerting compressive force on the yieldable seals and adjacent explosive of the female couplings.
  • FIG. 1 is an elevational view of a container in accordance with the invention with a part thereof in section showing the yieldable seal and adjacent explosive within the container;
  • FIG. 2 is a sectional view taken along line 22 of FIG. 1;
  • FIG. 3 is a fragmentary part elevational and part sectional view showing the interconnection of the containers of FIG. 1 to form an explosive column assembly.
  • a thin-wall elongated blown plastic container 1 has an explosive 2 disposed therein throughout the major length of the container.
  • a yieldable seal 3 is provided within the container 1 adjacent the explosive 2.
  • a double lead externally threaded male coupling 4 with a rounded thread and standard pitch of 29 and a convex end closure 5 are formed as a unitary structure in the thin wall at one end of the container 1 and the explosive 2 extends throughout the length of the coupling.
  • An internally threaded female coupling 6 with threads compatible to the male coupling is formed in the thin wall on the other end of the container 1 and extends substantially beyond the yieldable seal 3 and the explosive 2 positioned adjacent thereto.
  • the male coupling 4 has a reduced external diameter relative to the internal diameter of the female coupling 6 with a transition taper 7 being provided in the thin wall of the container 1 to accomplish this.
  • the relationship between the diameters of the couplings is such as to insure a snug and yet easily rotatable threading.
  • the threaded female coupling 6 has double lead internal threads 8 positioned in the midportion of the coupling. This arrangement facilitates the insertion of the male coupling of a like container since the unthreaded extending portion of the coupling 6 serves as a guiding sleeve for proper engagement of the threaded couplings and adds rigidity to the explosive column assembly. The arrangement also reduces the number of turns required for interconnection of like containers.
  • a considerable bending moment can occur in the coupling 6 particularly when several containers are interconnected in a horizontal position and then lifted for insertion in a vertical borehole. Accordingly, four equally spaced reinforcing fillets 9 are provided which extend across the threads 8. For the same reason and to counteract unusual bending moments imparted to the body of the thin-wall container 1, a plurality of longitudinal reinforcing ribs Ill is spaced circumferentially about and substantially coextensive with that portion of the body of the container lying between the male coupling l and the female coupling 6.
  • a plurality of girth reinforcing ribs 11 is spaced along the length of the longitudinal ribs 19 to insure overall integrity of the body structure of the container 1 against deformation under various conditions of manufacture and field handling. It has been found that the longitudinal reinforcing ribs ll) should have a width of not more than the width of the areas 12 lying therebetween and that :3 ordinarily. three to five of the girth reinforcing ribs 11 spaced along the length of the longitudinal ribs give very satisfactory results for the average size of most commercial cartridges.
  • the threaded portion of the male coupling 4 is greater than the threaded portion of the female coupling 6 to insure that in threadedly assembling a column of the containers 1, the convex end closure of the male coupling exerts a positive compressive force on the yieldable seal 3 and adjacent explosive 2 of the female coupling of a like container. If the packaged exposive is soft,. the yieldable seal 3 will be depressed therein as illustrated particularly in FIG. 3 depicting the interconnection of two like containers where 1a and its like parts represent a superjacent container and 1 and its like parts represent the subjacent container. If the packaged explosive is hard, there will be very little depression, if any, of the yieldable seal 3.
  • a series of thin-wall containers was formed by blowmolding high-density polyethylene having a density of 0.962 and a nominal melt index of 0.8 (I at 190 C.). These containers were molded in a split mold designed to yield the structure heretofore described and illustrated as a preferred embodiment of the invention. Dimensions of the containers were 22%" overall length, 2 body diameter, sixteen reinforcing ribs wide raised 2" around 2 diameter, male coupling 4%" long, threaded portion of male coupling 2 /2" with convex end closure extending and with one rounded thread per 1" with double lead, said thread having a root diameter of 2 /s.
  • the ribbed body portion had five girth ribs 75 wide equally spaced with the exception of a midportion 4" long wherein three longitudinal ribs were omitted to provide a smooth area for labeling.
  • the wall thickness of the body of the container including the female coupling was approximately 40 mils, and the wall thickness of the male coupling was approximately 55 mils. Programming was used during the blow-molding process dto obtain female couplings that were uniform in thickness and strength.
  • Each of these containers was charged with approximately 5 pounds of explosive composition consisting of 49.0% nitroglycerin, 1.5% nitrocotton, 36.0% sodium nitrate, 7.0% pulp, 3.0% coated cob meal, 2.0% starch, 0.5% bagasse and 1.0% chalk.
  • This charge filled each container to a height approximately level with the girth rib adjacent the female coupling.
  • a cupped polyethylene sealing disk approximately 25 mils thick was then placed over the explosive and snugly fitted into the annular girth rib adjacent the female coupling.
  • the containers thus manufactured were tested and initiated under conventionalt field conditions as explosive column assemblies containing from two to ten containers in each assembly. The tests were satisfactory in all respects with additional advantages hereinafter set forth. 2
  • the containers of this invention may be formed from many of the plastic materials capable of being blown but that the economy of the material will largely dictate its use.
  • linear polyethylene is preferred and has been found highly satisfactory
  • polyolefins generally, and copolymers and alloys thereof and other materials such as ABS terpolymer, plasticized vinyl chloride, plasticized vinyl chloride-vinyl acetate copolymer and the like may be used.
  • other explosives of various types suitable for various other blasting purposes may be used such as generally, gelatins, dynamites, permissibles, safety explosives, slurry explosives and the like.
  • aqueous slurry explosives which show a one inch or two inch propagation gap under water, and for gelatin dynamites Where under very high water pressure, the propagation gap is markedly reduced as compared to that observed under low water pressure.
  • other plastics such as those set forth for the container and nonplastic seals may be used including treated paper board, waxes, resins, waterproofing compounds, and the like.
  • the seal can be a plastic cup sealed around its lip and the shell body with a hot melt adhesive, or a wax such as paraffin, or resins or asphaltic compounds or the like where extreme water proofness is desired.
  • the seals should be yieldable in respect to deflection or in respect to sliding along the wall of the container or otherwise yielding so that compressive force is gently but firmly developed with close proximity assured as between adjacent container explosive charges.
  • continuous male and female threads have been depicted for the couplings, the term threaded is meant to include interrupted threads, the essential feature being that suificient thread pitch be utilized to function with for ward progression to insure compression as the couplings herein described.
  • the reinforcing ribs have been described as raised, they may be obtained also by providing a constant body diameter with the areas such as 12 depressed, thus forming ribs such as 10 and 11.
  • the explosive containers of this invention are made available in sizes from about 6 to about inches in length and from about 1 to about 8 inches in diameter with the number of interconnected units dependent upon the specific service desired.
  • the 2 /2" x 22%" container herein specifically described has been found a popular size.
  • an increase in the wall thickness of the plastic is ofcourse necessary but, nevertheless, due to the blown feature and other structural features introduced by this invention, the wall thickness need be only slightly increased, not exceeding about 10 to 25%, thus retaining efficient and economical manufacture.
  • a container for explosives adapted for interconnection with like containers to form an explosive column assembly which comprises:
  • the male coupling having a reduced external diameter relative to the internal diameter of the female coupling and the end closure of said male coupling having protrusion means to contact and to force the yieldable seal of a like container into the explosive adjacent thereto so that like containers of explosive threadedly interconnected by the male and female couplings to form an explosive column. assembly have the end closures of the male cou plings exerting compressive force on the yieldable seals and adjacent explosive of the female couplings.
  • a container for explosives adapted for interconnection with like containers to form an explosive column assembly which comprises:
  • a container for explosives adapted for interconnection with like containers to form an explosive column assembly which comprises:
  • the male coupling having a reduced external diameter relative to the internal diameter of the female coupling and the end closure of said male coupling having protrusion means to contact and to force the yieldable seal of a like container into the explosive adjacent thereto so that like containers of explosive threadedly interconnected by the male and female couplings to form an explosive column assembly have the end closures of the male couplings exerting compressive force on the yieldable seals and adjacent explosive of the female couplings.
  • a container for explosives adapted. for interconnection with like containers to form an explosive column assembly which comprises:
  • the male coupling having a reduced external diameter relative to the internal diameter of the female coupling and the and closure of said male coupling having protrusion means to contact and to force the yieldable seal of a like container into the explosive adjacent thereto so that like containers of explosive threadedly interconnected by the male and female couplings to form an explosive column assembly have the end closures of the male coupl-rngs exerting compressive force on the yieldable seals and adjacent explosive of the female couplings.
  • a container for explosives adapted for interconnectron with like containers to form an explosive column assembly which comprises:
  • a container for explosives adapted for interconnection with like containers to form an explosive column assembly which comprises:
  • the explosive cartridge according to claim 6 wherein the blown polyethylene plastic is high-density polyethylene characterized 'by a density of 0.962 and a nominal melt index of 0.8.
  • An explosive column assembly comprising:
  • each of said containers having a threaded male coupling and a projected end closure having protrusion means atone end and a threaded female coupling' and yieldable 'seal adjacent the explosive at the other end, and
  • the explosive column assembly according to claim 11 wherein the plastic is high density polyethylene charagterized by a density of 0.962 and a nominal melt index 0 0.8.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
  • Packages (AREA)
  • Vibration Dampers (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
  • Closures For Containers (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)
US337090A 1964-01-10 1964-01-10 Explosive container with yieldable seal Expired - Lifetime US3185092A (en)

Priority Applications (13)

Application Number Priority Date Filing Date Title
US337089A US3186340A (en) 1964-01-10 1964-01-10 Explosive container with yieldable seal
US336955A US3185091A (en) 1964-01-10 1964-01-10 Explosive container with yieldable seal
US337090A US3185092A (en) 1964-01-10 1964-01-10 Explosive container with yieldable seal
GB53081/64A GB1031129A (en) 1964-01-10 1964-12-31 Improvements in or relating to a container for explosives
FR45465A FR1426427A (fr) 1964-01-10 1965-01-06 Perfectionnements à un récipient pour explosifs
BE658015D BE658015A (xx) 1964-01-10 1965-01-07
ES0307958A ES307958A1 (es) 1964-01-10 1965-01-09 Mejoras introducidas en la fabricacion de recipientes para explosivos.
DE19651446960 DE1446960A1 (de) 1964-01-10 1965-01-11 Behaelter fuer Explosivstoffe
NL6500284A NL6500284A (xx) 1964-01-10 1965-01-11
US577448A US3395642A (en) 1964-01-10 1966-09-06 Explosive container
US577211A US3376816A (en) 1964-01-10 1966-09-06 Explosive container
ES344711A ES344711A2 (es) 1964-01-10 1967-09-02 Mejoras introducidas en la fabricacion de recipientes para explosivos.
FR49087A FR94118E (fr) 1964-01-10 1967-09-06 Perfectionnement a un récipient pour explosifs.

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US337089A US3186340A (en) 1964-01-10 1964-01-10 Explosive container with yieldable seal
US337090A US3185092A (en) 1964-01-10 1964-01-10 Explosive container with yieldable seal
DEH0054813 1965-01-11
US577448A US3395642A (en) 1964-01-10 1966-09-06 Explosive container
US577211A US3376816A (en) 1964-01-10 1966-09-06 Explosive container

Publications (1)

Publication Number Publication Date
US3185092A true US3185092A (en) 1965-05-25

Family

ID=27512101

Family Applications (4)

Application Number Title Priority Date Filing Date
US337090A Expired - Lifetime US3185092A (en) 1964-01-10 1964-01-10 Explosive container with yieldable seal
US337089A Expired - Lifetime US3186340A (en) 1964-01-10 1964-01-10 Explosive container with yieldable seal
US577448A Expired - Lifetime US3395642A (en) 1964-01-10 1966-09-06 Explosive container
US577211A Expired - Lifetime US3376816A (en) 1964-01-10 1966-09-06 Explosive container

Family Applications After (3)

Application Number Title Priority Date Filing Date
US337089A Expired - Lifetime US3186340A (en) 1964-01-10 1964-01-10 Explosive container with yieldable seal
US577448A Expired - Lifetime US3395642A (en) 1964-01-10 1966-09-06 Explosive container
US577211A Expired - Lifetime US3376816A (en) 1964-01-10 1966-09-06 Explosive container

Country Status (7)

Country Link
US (4) US3185092A (xx)
BE (1) BE658015A (xx)
DE (1) DE1446960A1 (xx)
ES (1) ES344711A2 (xx)
FR (1) FR94118E (xx)
GB (1) GB1031129A (xx)
NL (1) NL6500284A (xx)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3246602A (en) * 1964-07-09 1966-04-19 Gulf Oil Corp Explosive cartridge with rigid closure means
US3285173A (en) * 1965-05-20 1966-11-15 Hercules Inc Booster device
US3306200A (en) * 1964-11-20 1967-02-28 Phillips Petroleum Co Container and method of making the same
US3410440A (en) * 1966-05-12 1968-11-12 Phillips Petroleum Co Container
US3420173A (en) * 1967-03-31 1969-01-07 Atlas Chem Ind Axially expandable and contractable container
US3504628A (en) * 1965-09-24 1970-04-07 Douglas H Pack Packaging for slurry explosives
US4278025A (en) * 1979-02-12 1981-07-14 Mcreynolds Oliver B Seismic explosive charge loader and anchor
US4348955A (en) * 1979-12-14 1982-09-14 C-I-L Inc. Explosive container
US4546703A (en) * 1983-11-02 1985-10-15 Thompson Farish R Charge placement device

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3185092A (en) * 1964-01-10 1965-05-25 Hercules Powder Co Ltd Explosive container with yieldable seal
US3285172A (en) * 1965-05-20 1966-11-15 Hercules Inc Booster device
US3431848A (en) * 1967-04-28 1969-03-11 Hercules Inc Explosive cartridge assemblies
US3677180A (en) * 1970-11-20 1972-07-18 Phillips Petroleum Co Explosive device and container
GB1453884A (en) * 1974-04-10 1976-10-27 Ici Ltd Explosive charge
US4000696A (en) * 1975-09-05 1977-01-04 Excoa, Inc. Cartridge for two component field mixed explosive
US4037536A (en) * 1975-09-08 1977-07-26 Imc Chemical Group, Inc. Enclosure for explosive material
US4129228A (en) * 1976-04-05 1978-12-12 Stoneback John W Medication container with quick release closure
CA1107142A (en) * 1978-09-21 1981-08-18 Du Pont Canada Inc. Explosives package
GB8604060D0 (en) * 1986-02-19 1986-03-26 Dobson F T Hygroscopic explosives containers
US4953464A (en) * 1987-07-13 1990-09-04 Atlas Powder Company Multi-directional signal transmission in a blast initiation system
US4821645A (en) * 1987-07-13 1989-04-18 Atlas Powder Company Multi-directional signal transmission in a blast initiation system
US5435250A (en) * 1992-09-25 1995-07-25 Pollock; Edward S. Explosive packaging system
FR2713328B1 (fr) * 1993-12-01 1996-01-26 Giat Ind Sa Conteneur pour charge propulsive pouvant être rendu solidaire d'un autre conteneur.
FR2720495B1 (fr) * 1994-05-25 1996-07-19 Giat Ind Sa Dispositif permettant de solidariser deux conteneurs et conteneur associé à un tel dispositif.
FR2721375B1 (fr) * 1994-06-16 1996-08-14 Giat Ind Sa Dispositif solidarisant deux conteneurs et conteneur associé à un tel dispositif.
US6129687A (en) * 1997-08-21 2000-10-10 Powell; David Rollable massaging device
DE19749486A1 (de) * 1997-11-08 1999-05-12 Dynamit Nobel Ag Verbindung von Rohrabschnitten verbrennbarer Treibladungshülsen
GB0129176D0 (en) * 2001-12-06 2002-01-23 Dca Design Int Ltd Improvements in and realting to a medicament cartridge assembly
US7234780B2 (en) * 2002-12-09 2007-06-26 Confer Plastics, Inc. Indented female blow-molded connector and male connector and method
US20040107551A1 (en) * 2002-12-09 2004-06-10 Lipniarski David J. Indented female blow-molded connector
US7275289B2 (en) * 2002-12-09 2007-10-02 Confer Plastics Inc. Indented female blow-molded connector and male connector and method

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US1940657A (en) * 1933-01-28 1933-12-19 Remington Arms Co Inc Ammunition
US2345887A (en) * 1940-04-05 1944-04-04 Hercules Powder Co Ltd Method of sealing containers
US2383542A (en) * 1943-03-19 1945-08-28 Edwin A Godfrey Paper container for dynamite
US2500276A (en) * 1945-12-22 1950-03-14 Walter L Church Safety joint
US2755735A (en) * 1955-03-09 1956-07-24 Illinois Powder Mfg Company Explosive cartridge assembly
US3013492A (en) * 1959-01-21 1961-12-19 Sexton Can Co Inc Explosive cartridge

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GB189621845A (en) * 1896-10-02 1897-08-07 Benjamin Robinson Improvements in the Means of Connecting or of Closing the Ends of Pipes or the like.
US788200A (en) * 1903-08-12 1905-04-25 Ernest Finch Stovepipe-thimble.
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US2857844A (en) * 1956-03-15 1958-10-28 Olin Mathieson Explosive assembly
US3185092A (en) * 1964-01-10 1965-05-25 Hercules Powder Co Ltd Explosive container with yieldable seal
US3306200A (en) * 1964-11-20 1967-02-28 Phillips Petroleum Co Container and method of making the same

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1037709A (en) * 1912-04-13 1912-09-03 F B Zieg Mfg Company Culvert-pipe.
US1940657A (en) * 1933-01-28 1933-12-19 Remington Arms Co Inc Ammunition
US2345887A (en) * 1940-04-05 1944-04-04 Hercules Powder Co Ltd Method of sealing containers
US2383542A (en) * 1943-03-19 1945-08-28 Edwin A Godfrey Paper container for dynamite
US2500276A (en) * 1945-12-22 1950-03-14 Walter L Church Safety joint
US2755735A (en) * 1955-03-09 1956-07-24 Illinois Powder Mfg Company Explosive cartridge assembly
US3013492A (en) * 1959-01-21 1961-12-19 Sexton Can Co Inc Explosive cartridge

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3246602A (en) * 1964-07-09 1966-04-19 Gulf Oil Corp Explosive cartridge with rigid closure means
US3306200A (en) * 1964-11-20 1967-02-28 Phillips Petroleum Co Container and method of making the same
US3285173A (en) * 1965-05-20 1966-11-15 Hercules Inc Booster device
US3504628A (en) * 1965-09-24 1970-04-07 Douglas H Pack Packaging for slurry explosives
US3410440A (en) * 1966-05-12 1968-11-12 Phillips Petroleum Co Container
US3420173A (en) * 1967-03-31 1969-01-07 Atlas Chem Ind Axially expandable and contractable container
US4278025A (en) * 1979-02-12 1981-07-14 Mcreynolds Oliver B Seismic explosive charge loader and anchor
US4348955A (en) * 1979-12-14 1982-09-14 C-I-L Inc. Explosive container
US4546703A (en) * 1983-11-02 1985-10-15 Thompson Farish R Charge placement device

Also Published As

Publication number Publication date
FR94118E (fr) 1969-07-04
US3376816A (en) 1968-04-09
GB1031129A (en) 1966-05-25
US3395642A (en) 1968-08-06
ES344711A2 (es) 1969-01-01
BE658015A (xx) 1965-07-07
US3186340A (en) 1965-06-01
DE1446960A1 (de) 1969-04-17
NL6500284A (xx) 1965-07-12

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