US2684502A - Method of making cartridges - Google Patents

Method of making cartridges Download PDF

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Publication number
US2684502A
US2684502A US118782A US11878249A US2684502A US 2684502 A US2684502 A US 2684502A US 118782 A US118782 A US 118782A US 11878249 A US11878249 A US 11878249A US 2684502 A US2684502 A US 2684502A
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Prior art keywords
cartridge
core
shell
die
liner
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US118782A
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Paulve Marcel Luc Amedee
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Priority to FR995100D priority Critical patent/FR995100A/en
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Priority to US118782A priority patent/US2684502A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/1418—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the inserts being deformed or preformed, e.g. by the injection pressure
    • B29C45/14196—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the inserts being deformed or preformed, e.g. by the injection pressure the inserts being positioned around an edge of the injected part
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D51/00—Making hollow objects
    • B21D51/16—Making hollow objects characterised by the use of the objects
    • B21D51/54—Making hollow objects characterised by the use of the objects cartridge cases, e.g. for ammunition, for letter carriers in pneumatic-tube plants
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/1418—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the inserts being deformed or preformed, e.g. by the injection pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B5/00—Cartridge ammunition, e.g. separately-loaded propellant charges
    • F42B5/26—Cartridge cases
    • F42B5/30—Cartridge cases of plastics, i.e. the cartridge-case tube is of plastics
    • F42B5/307—Cartridge cases of plastics, i.e. the cartridge-case tube is of plastics formed by assembling several elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C2045/1486—Details, accessories and auxiliary operations
    • B29C2045/14967—Injecting through an opening of the insert
    • B29C2045/14975—Injecting through an opening of the insert the injection nozzle penetrating through the insert
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2705/00—Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts

Definitions

  • This invention relates to an improved construction of cartridges, especially sporting cartridges.
  • Another object is to provide an improved form of cartridge in which the main body of the cartridge case is formed of a plastic material, while retaining the advantages of metal cartridge cases as to strength, deformability, and dimensional stability.
  • a further object is to provide an improved sporting cartridge having improved ballistic characteristics and in which the main body of the case may be accuratel and economically produced by such methods as injection-molding aplastic.
  • a more specific object is to provide an improved cartridge case which comprises a main body of plastic material over at least part of the outer periphery of which there extends a thin strong shell, casing or liner as of metal.
  • a further object is to provide such a cartridge in which the internal and external contours may be formed with high accuracy to conform with the bore and chamber of a given sporting gun.
  • the improved method of producing a cartridge case according to my invention may comprise first forming an outer shell, casing or liner of a strong deformable material, preferably metal, designed so as to extend over the full length, or only part of the length, of the cartridge-case, then injection-molding in the shell thus provided a main body of plastic material.
  • a strong deformable material preferably metal
  • said shell preferably comprises a base section encasing the base of the cartridge and a top or crimping section around the mouth of the cartridge case.
  • My invention further provides a. method of forming a cartridge case which comprises forming an external metallic shell designed to extend over at least part of the outer periphery of a cartridge case, forming an aperture in the base wall of said shell corresponding in location with that of the primer, inserting a, suitably contoured core into said shell in spaced relation with the walls thereof and moulding, preferably injectionmoulding, plastic material through said hole into the space between the shell and the core.
  • My invention also provides equipment for producing cartridge cases by the method described, and comprising a die having an inner contour accurately conforming to the outer contour of the finished cartridge case, a core within and spaced from said die conforming in its Outer contour with the inner contour of said cartridgecase, and an end-plate for sealing said die having an injection nozzle projecting therethrough into said die, preferably formed with radial discharge nozzles and having an extension adapted to project into an end hole of said core to centre the core both with respect to said die and said nozzle.
  • Fig. 1 illustrates in cross-section full length casing for my improved cartridge.
  • Fig. 2 illustrates the same casing or lining with an aperture formed in its base wall to afford passage for the primer
  • Fig. 3 illustrates by way of example one form of moulding or injection device.
  • Figs. l and 5 illustrate finished cartridge-cases.
  • Figs. 6 and 7 respectively show partial casing elements for the crimping end and the base of the cartridge.
  • Figs. 8, 9 and 19 show similar casing sections aft-er formation of apertures therein for a purpose to be described.
  • Fig. 11 shows one form of a pressure-moulding or die-casting equipment for such partial or sectional casings.
  • Figs. 12 and 13 represent finished cartridgecases with partial casing or lining elements.
  • a liner, shell, casing or sheath is first prepared by any suitable means.
  • Said liner may be made of metal, and produced by extrusion from a disc-shaped blank. It may also be made of suitable plastic material and pressure-moulded or die-cast. The liner or sheath 1 may also be obtained in any other suitable way.
  • an aperture 3 is formed (Fig. 2) to correspond with the location of the primer.
  • the means shown in Fig. 3 comprise a die 4 sealed at its bottom end with a plate 5 in which may be inserted for instance an injection nozzle 6 projecting through the aperture 3 in the liner and formed with a main axial delivery duct 7 discharging into radial discharge ducts 8.
  • a core 9 of suitable shape is placed in the die 4 and is centred therein by means of an axial bore in into which a projecting end of the nozzle 6 extends.
  • the external surface of the core is conformed to the shape of the internal surface of th finished. cartridge-case.
  • a shoulder H, and a tapered section a-b may be provided.
  • the core 9 is smaller in efiective length than the liner I, so that the top end be of the liner extends beyond the top of the body 12 of plastic material (Figs. 4 and Plastic material I2 is delivered under pressure through the nozzle 6. The pressure of delivery applies the liner 1 against the die a and insures that an accurately appropriate external contour is provided for the finished cartridge-case.
  • Figs. 6 to 13 relate to an embodiment of the invention in which a cartridge-case is provided with partial or fragmentary liner sections rather than a solid unbroken liner over the full length of the cartridge-case as in the foregoing embodiment.
  • the liner then comprises an upper liner ection or so-called crimping liner section 2' and a bottom or base liner section I.
  • apertures [3 are provided into which said plastic material penetrates.
  • suitable inwardly directed projections could be provided in the top section I to achieve a similar purpose. In all other respects the arrangements are the same as described above in connection with Figs. 1 to 5, and will require no further description.
  • annular bead l4 may be integrally formed in the plastic body in the pressure moulding operation to provide means for stopping the plug or wadding.
  • Method of manufacturing a cartridge case or the like comprising the steps of forming an outer plain tubular and substantially cylindrical shell of a strong deformable material to extend over at least part of the outer periphery of a cartridge-case, forming a hole centrally of the base of said shell to correspond with the locationcn of a primer for said cartridge, inserting said shell into a moulding die, inserting a core within and spaced from said shell in said die, inserting axially in said core and through said hole an injection pipe with radial holes registering with the annular space between the core and the shell, and injecting a plastic through said pipe and holes, into the said space between said shell and said core, said injection being executed under a certain pressure which radially deforms the shell in order to form the desired shape of the bottom of the cartridge.
  • a method for producing an improved cartridge case which comprises forming a tubular top shell element and a plain tubular and cylindrical base shell element from a strong deformable material to extend over the top and base sections respectively of said cartridgecase, forming a hole centrally of the bottom of said base element, positioning said shell elements in a die and positioning a core axially of and spaced from said elements in said die, inserting axially in said core and through said hole an injection pipe with a series of radial holes registering with the annular space between the core and the shell elements, and injection-moulding a plastic through said pipe and bottom hole into the spacing between said elements and said core to form a body for said cartridge-case, said injection being executed under a certain pressure which radially deforms the base shell element in order to give it the desired shape.
  • An assembly for making a cartridge case of the type having at least one shell element of strong deformable material and an inner coating of plastic material comprising a hollow molding die having a molding cavity of a contour conforming to the external contour of the case to be made and having opposin open ends, a core externally conforming to the internal contour of the case to be made removably positioned within the molding cavity inside the die and having a first end spaced inwardly from one of the open ends of the die and having a second end diametrically larger than the first end and engagin the inner wall of the die to close off the cavity at the other open end of the die, the portion of the core from the first end up to a point spaced axially from the second end being radially spaced from the inner wall of the die, said core having a central, axial hole, an end plate for said, molding cavity transversely positioned on the open end of the die and enclosing said end to define an end wall of the molding cavity, said end plate having a central opening aligne

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • General Engineering & Computer Science (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Description

I July 27, 4 M. L. A. PAULVE f 5 METHOD OF MAKING CARTRIDGES Filed Sept. 30, 1949 2 Shets-Sheet 1 y 27, Q LI -PAULVE 2,684,502
METHOD MAKING CARTRIDGES Filed Sept. 50, 1949 I 2 Sheets-Sheet 2 "Q B Q 9 a L: bi
Q Q "U I i Patented July 27, 1954 UNITED STATES PATENT QFFHCE 3 Claims.
This invention relates to an improved construction of cartridges, especially sporting cartridges.
While metal is frequently used in the manufacture of sporting cartridge cases, this oilers some drawbacks. Where thin-gauge metal is used to form such a cartridge-case, special sizes of wadding are required to plug the cartridge, and this constitutes a difficulty in loading the cartridge for the gunsmith. Where on the other hand the metal of the cartridge case is heavy, it will tend to acquire a permanent set after the shot is fired so that ejection of the used cartridge case is made diilicult.
It is an object of this invention to eliminate the above limitations in the manufacture of sporting cartridges.
Another object is to provide an improved form of cartridge in which the main body of the cartridge case is formed of a plastic material, while retaining the advantages of metal cartridge cases as to strength, deformability, and dimensional stability.
A further object is to provide an improved sporting cartridge having improved ballistic characteristics and in which the main body of the case may be accuratel and economically produced by such methods as injection-molding aplastic.
A more specific object is to provide an improved cartridge case which comprises a main body of plastic material over at least part of the outer periphery of which there extends a thin strong shell, casing or liner as of metal.
A further object is to provide such a cartridge in which the internal and external contours may be formed with high accuracy to conform with the bore and chamber of a given sporting gun.
Further objects include the provision of an improved method of, and equipment for, producing cartrdige cases of the above-described charactor.
The improved method of producing a cartridge case according to my invention may comprise first forming an outer shell, casing or liner of a strong deformable material, preferably metal, designed so as to extend over the full length, or only part of the length, of the cartridge-case, then injection-molding in the shell thus provided a main body of plastic material. Where only a partial metal shell i provided, said shell preferably comprises a base section encasing the base of the cartridge and a top or crimping section around the mouth of the cartridge case.
My invention further provides a. method of forming a cartridge case which comprises forming an external metallic shell designed to extend over at least part of the outer periphery of a cartridge case, forming an aperture in the base wall of said shell corresponding in location with that of the primer, inserting a, suitably contoured core into said shell in spaced relation with the walls thereof and moulding, preferably injectionmoulding, plastic material through said hole into the space between the shell and the core.
My invention also provides equipment for producing cartridge cases by the method described, and comprising a die having an inner contour accurately conforming to the outer contour of the finished cartridge case, a core within and spaced from said die conforming in its Outer contour with the inner contour of said cartridgecase, and an end-plate for sealing said die having an injection nozzle projecting therethrough into said die, preferably formed with radial discharge nozzles and having an extension adapted to project into an end hole of said core to centre the core both with respect to said die and said nozzle.
In the accompanying exemplary drawings:
Fig. 1 illustrates in cross-section full length casing for my improved cartridge.
Fig. 2 illustrates the same casing or lining with an aperture formed in its base wall to afford passage for the primer,
Fig. 3 illustrates by way of example one form of moulding or injection device.
Figs. l and 5 illustrate finished cartridge-cases.
Figs. 6 and 7 respectively show partial casing elements for the crimping end and the base of the cartridge.
Figs. 8, 9 and 19 show similar casing sections aft-er formation of apertures therein for a purpose to be described.
Fig. 11 shows one form of a pressure-moulding or die-casting equipment for such partial or sectional casings.
Figs. 12 and 13 represent finished cartridgecases with partial casing or lining elements.
In the embodiment of the invention illustrated in Figs. 1 to 5, a liner, shell, casing or sheath is first prepared by any suitable means. Said liner may be made of metal, and produced by extrusion from a disc-shaped blank. It may also be made of suitable plastic material and pressure-moulded or die-cast. The liner or sheath 1 may also be obtained in any other suitable way.
In the bottom or end wall of the liner I an aperture 3 is formed (Fig. 2) to correspond with the location of the primer.
The means shown in Fig. 3 comprise a die 4 sealed at its bottom end with a plate 5 in which may be inserted for instance an injection nozzle 6 projecting through the aperture 3 in the liner and formed with a main axial delivery duct 7 discharging into radial discharge ducts 8.
A core 9 of suitable shape is placed in the die 4 and is centred therein by means of an axial bore in into which a projecting end of the nozzle 6 extends. The external surface of the core is conformed to the shape of the internal surface of th finished. cartridge-case. Thus, for example, a shoulder H, and a tapered section a-b may be provided. The core 9 is smaller in efiective length than the liner I, so that the top end be of the liner extends beyond the top of the body 12 of plastic material (Figs. 4 and Plastic material I2 is delivered under pressure through the nozzle 6. The pressure of delivery applies the liner 1 against the die a and insures that an accurately appropriate external contour is provided for the finished cartridge-case.
Figs. 6 to 13 relate to an embodiment of the invention in which a cartridge-case is provided with partial or fragmentary liner sections rather than a solid unbroken liner over the full length of the cartridge-case as in the foregoing embodiment. The liner then comprises an upper liner ection or so-called crimping liner section 2' and a bottom or base liner section I.
To improve adhesion of the crimping liner section with the underlying plastic body l2, apertures [3 are provided into which said plastic material penetrates. Rather than apertures l3, suitable inwardly directed projections (not shown) could be provided in the top section I to achieve a similar purpose. In all other respects the arrangements are the same as described above in connection with Figs. 1 to 5, and will require no further description.
As shown in Fig. 13 an internal annular bead l4 may be integrally formed in the plastic body in the pressure moulding operation to provide means for stopping the plug or wadding.
It will of course be understood that various alterations may be made in the specific examples illustrated without exceedin the scope of the invention as defined in the ensuing claims.
What I claim is:
1. Method of manufacturing a cartridge case or the like, comprising the steps of forming an outer plain tubular and substantially cylindrical shell of a strong deformable material to extend over at least part of the outer periphery of a cartridge-case, forming a hole centrally of the base of said shell to correspond with the locaticn of a primer for said cartridge, inserting said shell into a moulding die, inserting a core within and spaced from said shell in said die, inserting axially in said core and through said hole an injection pipe with radial holes registering with the annular space between the core and the shell, and injecting a plastic through said pipe and holes, into the said space between said shell and said core, said injection being executed under a certain pressure which radially deforms the shell in order to form the desired shape of the bottom of the cartridge.
2. A method for producing an improved cartridge case which comprises forming a tubular top shell element and a plain tubular and cylindrical base shell element from a strong deformable material to extend over the top and base sections respectively of said cartridgecase, forming a hole centrally of the bottom of said base element, positioning said shell elements in a die and positioning a core axially of and spaced from said elements in said die, inserting axially in said core and through said hole an injection pipe with a series of radial holes registering with the annular space between the core and the shell elements, and injection-moulding a plastic through said pipe and bottom hole into the spacing between said elements and said core to form a body for said cartridge-case, said injection being executed under a certain pressure which radially deforms the base shell element in order to give it the desired shape.
3. An assembly for making a cartridge case of the type having at least one shell element of strong deformable material and an inner coating of plastic material, said assembly comprising a hollow molding die having a molding cavity of a contour conforming to the external contour of the case to be made and having opposin open ends, a core externally conforming to the internal contour of the case to be made removably positioned within the molding cavity inside the die and having a first end spaced inwardly from one of the open ends of the die and having a second end diametrically larger than the first end and engagin the inner wall of the die to close off the cavity at the other open end of the die, the portion of the core from the first end up to a point spaced axially from the second end being radially spaced from the inner wall of the die, said core having a central, axial hole, an end plate for said, molding cavity transversely positioned on the open end of the die and enclosing said end to define an end wall of the molding cavity, said end plate having a central opening aligned with the hole in the core, a removable injection nozzle positioned through the opening in the end plate and having a closed end projecting into the hole in the core to retain the core in its centered position in the moldin cavity, said, nozzle having radial discharge openings formed inwardly of its closed end and registering with the space between the end of the core and the end plate.
References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 115,548 Wells May 30, 1871 237,700 Rodney Feb. 15, 1881 313,187 Dickerman Mar. 3, 1885 1,836,752 Goodwin Dec. 15, 1931 1,845,971 Katz Feb. 16, 1932 2,200,042 Salz May 7, 1940 2,408,629 Green Oct. 1, 1946
US118782A 1949-09-30 1949-09-30 Method of making cartridges Expired - Lifetime US2684502A (en)

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Application Number Priority Date Filing Date Title
FR995100D FR995100A (en) 1949-09-30 1949-07-15 Method and device for manufacturing a hunting cartridge, and cartridges thus obtained
US118782A US2684502A (en) 1949-09-30 1949-09-30 Method of making cartridges

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Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1090424B (en) * 1956-03-22 1960-10-06 Lemfoerder Metallwarengesellsc Casting mold for manufacturing seamless, elastic hollow bodies from organic thermoplastic
US3078876A (en) * 1960-11-16 1963-02-26 Standard Thomson Corp Pressure responsive actuator and method of making the same
US3159701A (en) * 1960-12-12 1964-12-01 George L Herter Injection molding of plastic ammunition case
US3164090A (en) * 1961-09-18 1965-01-05 Olin Mathieson Plastic ammunition cartridge
US3208649A (en) * 1961-08-01 1965-09-28 Roehr Products Company Inc Tamper proof closure
US3318985A (en) * 1964-04-01 1967-05-09 Continental Can Co Apparatus and method for making aerosol cans with an integral plastic compartment
US3351691A (en) * 1963-08-20 1967-11-07 Paul B Wilford Nozzle assembly and method of molding same
US3377951A (en) * 1961-10-13 1968-04-16 Olin Mathieson Plastic cartridge case
US3404454A (en) * 1965-10-14 1968-10-08 Rogers Corp Method of making a flat flexible cable termination
US3559581A (en) * 1968-12-05 1971-02-02 Blanicke Strojirny Np Method of manufacture of thin-walled plastic shell casings
US3647336A (en) * 1970-08-26 1972-03-07 Raybestos Manhattan Inc Mold for manufacture of cored rubber rolls
US3680996A (en) * 1969-09-17 1972-08-01 Sobrefina Sa Apparatus for moulding a container component
US3724983A (en) * 1971-02-19 1973-04-03 Rubber A Corp Apparatus for making rolls
US3765297A (en) * 1972-06-06 1973-10-16 Us Army Non-eroding, lightweight cartridge cases
US4076790A (en) * 1972-12-18 1978-02-28 Evald Torbjorn Gustav Lind Method of embodying a foil sheet in a thermoplastic object during the process of manufacturing said object
US4128381A (en) * 1976-08-12 1978-12-05 Composite Container Corporation System for preventing mandrel deflection in molding of thermoplastic materials
US4386755A (en) * 1980-06-23 1983-06-07 Teleflex Incorporated Mold for remote control assembly (vibration dampening)
US4941642A (en) * 1987-10-09 1990-07-17 Kurt Stoll Mold construction comprising a plurality of mold portions
EP0502606A2 (en) * 1991-03-04 1992-09-09 Siebolt Hettinga Method for molding a laminate
FR2757794A1 (en) * 1996-12-31 1998-07-03 Renault Flexible moulding equipment producing item of covered or plain automobile interior trim
US20060096489A1 (en) * 2002-08-08 2006-05-11 Ola Stark Insulated cartridge case and ammunition, method for manufacturing such cases and ammunition, and use of such cases and ammunition in various different weapon systems
WO2008119115A1 (en) * 2007-03-30 2008-10-09 Techventure Investments Pty Ltd A method of manufacturing ammunition
US20090178585A1 (en) * 2004-04-02 2009-07-16 Leslie Mervyn Harrison Projectile
US20150352762A1 (en) * 2014-06-04 2015-12-10 Calzaturificio Moda Italiana Srl Manufacturing process of shoe with internally waterproofed fabric upper
US10919560B2 (en) * 2016-03-07 2021-02-16 Thyssenkrupp Presta Ag Method for producing a variable-length steering shaft

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US2890615A (en) * 1953-11-30 1959-06-16 Jean M Lefebvre Method for the manufacture of cartridge cases for firearms
US2868058A (en) * 1956-10-29 1959-01-13 George R Dom Shotgun shell case neck resizer
DE1278289B (en) * 1963-12-13 1968-09-19 Dynamit Nobel Ag Cartridge for commercial or military use
GB1111287A (en) * 1965-07-08 1968-04-24 Imp Metal Ind Kynoch Ltd Cartridge cases

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US115548A (en) * 1871-05-30 Improvement in cartridges
US237700A (en) * 1881-02-15 rodney
US313187A (en) * 1885-03-03 Art of making metallic cartridge-shells
US1836752A (en) * 1928-03-22 1931-12-15 Goodrich Co B F Method and apparatus for molding articles of plastic material
US1845971A (en) * 1928-05-29 1932-02-16 Keyes Container Corp Explosive device and the like
US2200042A (en) * 1938-01-11 1940-05-07 Jacque A Salz Tubular article and method of making the same
US2408629A (en) * 1943-10-21 1946-10-01 Lee B Green Molding apparatus and method

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US115548A (en) * 1871-05-30 Improvement in cartridges
US237700A (en) * 1881-02-15 rodney
US313187A (en) * 1885-03-03 Art of making metallic cartridge-shells
US1836752A (en) * 1928-03-22 1931-12-15 Goodrich Co B F Method and apparatus for molding articles of plastic material
US1845971A (en) * 1928-05-29 1932-02-16 Keyes Container Corp Explosive device and the like
US2200042A (en) * 1938-01-11 1940-05-07 Jacque A Salz Tubular article and method of making the same
US2408629A (en) * 1943-10-21 1946-10-01 Lee B Green Molding apparatus and method

Cited By (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1090424B (en) * 1956-03-22 1960-10-06 Lemfoerder Metallwarengesellsc Casting mold for manufacturing seamless, elastic hollow bodies from organic thermoplastic
US3078876A (en) * 1960-11-16 1963-02-26 Standard Thomson Corp Pressure responsive actuator and method of making the same
US3159701A (en) * 1960-12-12 1964-12-01 George L Herter Injection molding of plastic ammunition case
US3208649A (en) * 1961-08-01 1965-09-28 Roehr Products Company Inc Tamper proof closure
US3164090A (en) * 1961-09-18 1965-01-05 Olin Mathieson Plastic ammunition cartridge
US3377951A (en) * 1961-10-13 1968-04-16 Olin Mathieson Plastic cartridge case
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FR995100A (en) 1951-11-26

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