EP0526924A1 - Patronenhülse aus verstärktem Papier - Google Patents

Patronenhülse aus verstärktem Papier Download PDF

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Publication number
EP0526924A1
EP0526924A1 EP92201938A EP92201938A EP0526924A1 EP 0526924 A1 EP0526924 A1 EP 0526924A1 EP 92201938 A EP92201938 A EP 92201938A EP 92201938 A EP92201938 A EP 92201938A EP 0526924 A1 EP0526924 A1 EP 0526924A1
Authority
EP
European Patent Office
Prior art keywords
shell
accordance
tube
elements
axis
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.)
Withdrawn
Application number
EP92201938A
Other languages
English (en)
French (fr)
Inventor
Paolo Fiocchi
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.)
Fiocchi Munizioni SpA
Original Assignee
Fiocchi Munizioni SpA
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 Fiocchi Munizioni SpA filed Critical Fiocchi Munizioni SpA
Publication of EP0526924A1 publication Critical patent/EP0526924A1/de
Withdrawn legal-status Critical Current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
    • F42B5/00—Cartridge ammunition, e.g. separately-loaded propellant charges
    • F42B5/26—Cartridge cases

Definitions

  • Shells are known, as for example the hunting type with lead shot, having the shell formed from a tubular part for containment of the charge and shot with a metal end cap containing the primer. It is clear that, upon shooting, the tubular part must resist high pressure without breaking or splitting.
  • tubular part In the known art said tubular part, generally to be discarded, is made of plastic or stout cardboard.
  • cardboard shells have mechanical characteristics poorer than those of plastic and, to be acceptable, the papers used for manufacture of the tube must be of excellent quality. With the manufacturing procedures for shells of the known art there are required thus papers with special characteristics such as those made with pure long fibre cellulose which can only be obtained by the use of virgin vegetable cellulose.
  • the general purpose of the present invention is to obviate the above mentioned shortcomings by supplying cardboard shells having mechanical characteristics of resistance comparable to those of plastic shells, even while using papers of not elevated quality, such as for example papers obtained by recycling.
  • FIG. 1 shows a shell, indicated as a whole by reference number 10, partially unwound to show its innovative structure.
  • the shell in accordance with the present invention is made of a strip of paper 11 and a strip of gauze 12 wound together with a bonding agent to form a tube 13 to which is applied at one end, in accordance with the known art, a normal metal end cap 14 containing for example a base wad 17 for firmly assembling the tube and end cap and supporting the cartridge primer.
  • Said base wad can be of paper or other biodegradable material.
  • the gauze must be of material of suitable mechanical strength depending on the characteristics of the shell it is desired to obtain and the type of paper used. For example, plain cotton has been found to be usable.
  • the tube is formed of successive alternating layers of gauze and paper glued together.
  • Such an embodiment furnishes high strength, both longitudinal and transverse, to the shell, making it competitive with plastic products, even though it is more economical to construct.
  • FIG. 2 shows an alternative embodiment applying again the principles claimed herein.
  • a shell 110 is realized by winding a strip of paper 111 together with parallel threads 115 so as to form a tube 113 to which is applied an end cap 114 similar to the end cap 14 of FIG. 1, with base wad 117.
  • the threads 115 can be made of cotton, nylon, metal, etc.
  • FIG. 3 shows a third embodiment in accordance with the innovative principles of the invention.
  • a shell 210 is made by winding a strip of paper 211 together with a thread 216 arranged helically so as to form a tube 213 to which is applied an end cap 214 similar to the end cap 14 of FIG. 1 and with base wad 217.
  • the thread 216 must be a material with mechanical characteristics based on the characteristics of the shell it is desired to obtain and the type of paper used. For example, threads of cotton, nylon, metal, plastic in general, etc. have been found usable.
  • the paper used be of high quality and it may be, for example, paper produced by recycling.
  • a shell is provided which disintegrates a short time after its abandonment to the elements.
  • the threads can be replaced by flexible elements realized in the form of strips. It is also possible, for example in the embodiment of FIG. 3, to use two threads arranged in opposing helices.
  • both the paper and the reinforcing elements can be wrapped with fixed or variable pitch inclined to the axis of rotation of the tube, e.g. at an angle of 45°.
  • the reinforcement elements are thus substantially laid in the direction of winding of the strip, it being intended that they are not parallel to the tube axis but inclined thereto.
EP92201938A 1991-07-05 1992-06-30 Patronenhülse aus verstärktem Papier Withdrawn EP0526924A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT91MI000624U ITMI910624U1 (it) 1991-07-05 1991-07-05 Bossoli con tubo di cartone a caratteristiche migliorate
ITMI910624U 1991-07-05

Publications (1)

Publication Number Publication Date
EP0526924A1 true EP0526924A1 (de) 1993-02-10

Family

ID=11358956

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92201938A Withdrawn EP0526924A1 (de) 1991-07-05 1992-06-30 Patronenhülse aus verstärktem Papier

Country Status (3)

Country Link
EP (1) EP0526924A1 (de)
CA (1) CA2070904A1 (de)
IT (1) ITMI910624U1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5607798A (en) * 1994-08-25 1997-03-04 Kimberly-Clark Corporation Soft and strong thermoplastic polymer and nonwoven fabric laminates

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1163884A (fr) * 1955-09-30 1958-10-02 Olin Mathieson Perfectionnements aux cartouches
US2984182A (en) * 1958-03-03 1961-05-16 R C Can Co Shotgun shell tube or cartridge
US3076409A (en) * 1960-09-12 1963-02-05 Olin Mathieson Spiral wound shotshell
FR2159855A5 (de) * 1971-11-04 1973-06-22 Areac Holding Luxembourg
EP0181473A1 (de) * 1984-10-31 1986-05-21 Fiocchi Munizioni Spa Jagdpatronenteil aus durch Lichteinwirkung abbaubarem Kunststoff

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1163884A (fr) * 1955-09-30 1958-10-02 Olin Mathieson Perfectionnements aux cartouches
US2984182A (en) * 1958-03-03 1961-05-16 R C Can Co Shotgun shell tube or cartridge
US3076409A (en) * 1960-09-12 1963-02-05 Olin Mathieson Spiral wound shotshell
FR2159855A5 (de) * 1971-11-04 1973-06-22 Areac Holding Luxembourg
EP0181473A1 (de) * 1984-10-31 1986-05-21 Fiocchi Munizioni Spa Jagdpatronenteil aus durch Lichteinwirkung abbaubarem Kunststoff

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5607798A (en) * 1994-08-25 1997-03-04 Kimberly-Clark Corporation Soft and strong thermoplastic polymer and nonwoven fabric laminates
US6224977B1 (en) 1994-08-25 2001-05-01 Kimberly-Clark Worldwide, Inc. Soft and strong thermoplastic polymer nonwoven fabric

Also Published As

Publication number Publication date
ITMI910624U1 (it) 1993-01-05
ITMI910624V0 (it) 1991-07-05
CA2070904A1 (en) 1993-01-06

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