EP0786641B1 - Zusammensetzung einer Gelatinekapselhülle in einem zielmarkierenden Geschoss und Herstellungsverfahren einer solchen Kapselhülle - Google Patents

Zusammensetzung einer Gelatinekapselhülle in einem zielmarkierenden Geschoss und Herstellungsverfahren einer solchen Kapselhülle Download PDF

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Publication number
EP0786641B1
EP0786641B1 EP97300052A EP97300052A EP0786641B1 EP 0786641 B1 EP0786641 B1 EP 0786641B1 EP 97300052 A EP97300052 A EP 97300052A EP 97300052 A EP97300052 A EP 97300052A EP 0786641 B1 EP0786641 B1 EP 0786641B1
Authority
EP
European Patent Office
Prior art keywords
fill
capsule
silicone oil
capsule shell
gelatin
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
EP97300052A
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English (en)
French (fr)
Other versions
EP0786641A1 (de
Inventor
Paul Lukas
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.)
Goldcaps Inc
Original Assignee
Goldcaps Inc
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Filing date
Publication date
Application filed by Goldcaps Inc filed Critical Goldcaps Inc
Publication of EP0786641A1 publication Critical patent/EP0786641A1/de
Application granted granted Critical
Publication of EP0786641B1 publication Critical patent/EP0786641B1/de
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
    • F42B12/00—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material
    • F42B12/02—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect
    • F42B12/36—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect for dispensing materials; for producing chemical or physical reaction; for signalling ; for transmitting information
    • F42B12/40—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect for dispensing materials; for producing chemical or physical reaction; for signalling ; for transmitting information of target-marking, i.e. impact-indicating type

Definitions

  • the present invention relates to a projectile of the type comprising a soft gelatin capsule enclosing a liquid fill and, more particularly, relates to such a projectile which is rapidly accelerated by subjection to a percussive force.
  • the percussive force is supplied by a blast of high pressurized gas supplied to the projectile in the barrel of a gun.
  • Such projectiles are intended to break on hitting a target to release the liquid fill.
  • the present invention also relates to a method for making such a projectile.
  • projectiles of this type are used primarily for marking targets, where on impact with the target the gelatin capsule will break and deposit its liquid fill on the target.
  • the liquid fill will comprise a paint or coloured dye to clearly and visibly mark the target.
  • the marking method may be used, for example, for the marking of trees or other inanimate objects, or for use in "war games" whereby the projectiles are used, instead of bullets, to indicate a hit on an opponent.
  • Gelatin capsules of this type are well known and usually comprise a soft gelatin capsule (or shell), formed with a plasticiser into a sealed sphere, to hold a liquid fill material such as paint, as discussed in British Patent No. 1,268,635 (GIARGER).
  • GIARGER British Patent No. 1,268,635
  • US 4,656,092 (basis for the preamble of claim 1) describes a target shooting capsule comprising a substantially spherical, nontoxic, soft elastic gelatin capsule.
  • the capsule contains a water washable, nontoxic dye fill material.
  • the fill material may comprise a fumed (colloidal) silica that in an amount of from 2 to 4 weight percent.
  • US 3,653,934 describes a gelatine composition suitable for producing capsules.
  • the composition essentially comprises the combination product of gelatin, water, glycerine and/or sorbitol and a silicone fluid having an intrinsic viscosity of from 100 to 12,500.
  • the capsules are described as being for use in the pharmaceutical industry and as having better resistance to enzymes, particularly those found in gastric juices.
  • US 5,353,712 describes a target shooting capsule comprising a non-toxic, biodegradable, injection moulded shell containing a water washable, non-toxic liquid dye fill material.
  • the capsule may be formed from a gelatin material.
  • FR 2741434 (GIAT INDUSTRIES SA) describes a projectile comprising a gelatin capsule having a liquid fill which comprises silicone oil. However, the document does not describe the presence of silicone in the capsule shell.
  • a disadvantage of known projectiles is that the contents of the capsule can absorb water from the gelatin, causing embrittlement of the capsule which can result in the capsule breaking under the normal percussive forces applied to it when fired from a gun.
  • the capsule become cold then expansion and even solidification (freezing) of the liquid fill contents can take place, which again can cause the capsule to split and break, or produce areas of weakness in the capsules which again fail when subject to the normal percussive forces when fired from a gun.
  • a projectile for withstanding high acceleration by a percussive force applied thereto comprising a soft elastic gelatin capsule shell and liquid fill, in which both the capsule shell and the fill comprise a silicone oil, characterised in that the capsule shell comprises 0.01 to 20% by weight of silicone oil.
  • silicone oil in the capsule shell serves to alleviate the effects of absorption of water from the capsule into the liquid fill which helps reduce the embrittlement of the capsule. If water is removed from the capsule shell then the soft elastic gelatin becomes more brittle and subject to failure and so by alleviating the effects of this water absorbtion out of the capsule shell serves to maintain the flexibility of the capsule.
  • a silicone oil content in the liquid fill serves to reduce both the expansion co-efficient of the liquid fill and the associated freezing point of the liquid fill.
  • the reduced expansion co-efficient of that liquid fill means that this liquid will not expand to such an extent (compared to a fill not containing silicone oil) when the temperature falls, thus reducing stress applied to the gelatin capsule shell.
  • silicone oil in the fill to reduce the fill freezing point means that the liquid fill will be able to withstand lower temperatures before freezing and is less likely to freeze solid at average winter temperatures, whereby freezing of the fill would result in further expansion of the capsule contents, creating additional stress on the capsule shell, possibly causing the capsule to rupture.
  • the capsule shell weight will be between 40 and 1000mg, with the fill weight between 60 and 4000mg.
  • the capsule shell itself will comprise gelatin, a plasticiser (or plasticisers) such as sorbitol and, usually, will further comprise a colouring agent and an opacifier.
  • the colouring agents are used to provide capsule shells of different colours so that different colours can identify projectiles for different operating conditions or having different contents of the projectile, or to simply identify the colour of the fill.
  • the capsule shell will comprise 0.01% to 20% by weight of silicone oil, with the liquid fill preferably comprising 0.01% to 30% by weight of silicone oil.
  • silicone oil will comprise either dimethylpolysiloxane or methylphenylpolysiloxane.
  • the silicone oil may make up all of the liquid fill.
  • the silicone oil employed in this present invention usually has a viscosity of between 0.5 and 10,000 centistokes and preferably, between 1 and 100 centistokes.
  • Projectiles of this type may also comprise a colouring agent in the fill which will usually be bright and readily distinguishable from a distance.
  • Usual colouring agents will include oil based paints or dyes.
  • the projectiles of this type will be substantially spherical, although it will be appreciated elongated shapes may be employed.
  • spherical projectiles allow for ease of loading within a gun since they do not need to be orientated in any particular way, and these spherical projectiles usually have a diameter between 1 and 3cm.
  • the capsule shell wall will have a thickness between 1 and 2mm which provides sufficient strength to withstand the percussive force when fired from a gun but rupture easily when the fire projectile encounters a target.
  • a method of manufacturing a projectile of the type previously described in the statement of invention which comprises the steps of mixing a silicone oil with both the gelatin capsule shell mixture and said liquid fill, forming said gelatin capsule shell mixture into a film to form the (at least two) parts of a capsule shell and enclosing said fill in said gelatin capsule shell and sealing said capsule.
  • the projectile manufactured by this method will have silicone oil retained in both the capsule shell and the liquid fill whereby the method comprises mixing the silicone oil with both the gelatin capsule shell mixture and the liquid fill in order to obtain an equilibrium of silicone oil across the capsule shell/fill boundary.
  • the present invention concerns projectiles having a soft elastic gelatin capsule enclosing a liquid fill.
  • Several techniques and processes for making such elastic gelatin capsule shells are well known, and basically include forming a substantially fluid gelatin mass and moulding this mass into sheets of flexible gelatin, forming these sheets into two halves of a capsule shell which then encapsulate a liquid fill material and are sealed together.
  • the method of forming capsules of this type and encapsulating the liquid fill are well known, and will not be discussed in detail in this specification. Basically, however, one process of manufacturing capsules of this type involves mixing together gelatin, glycerin and/or sorbitol and water which are melted (usually under vacuum) to produce a substantially fluid gelatin mass.
  • Solid or liquid dyes or paint may be added to this mixture to generate capsules of a desired colour.
  • This fluid mass may then be used for making capsules in the usual manner.
  • the fill material used in this invention may consist solely of silicone oil, optionally with a colourant, or of any suitable liquid, often based on oils or other lipophilic liquids, or a fill based on polyethylene glycols.
  • An example of a mixed fill will comprise polyethylene glycol, colourant, opacifier and water.
  • the colourants used may be varied to produce fills of different colours.
  • the gelatin mass in sheet form may then be used to encapsulate the liquid fill material, and solidified to form a soft elastic gelatin shell about the fill material.
  • the particular methods used for making the soft elastic gelatin shell is not considered part of the invention herein but may incorporate one of a number of any known techniques. However, it is preferred that the technique used produces substantially spherical sealed gelatin shells. Spherical shells have the benefit of ease of manufacture and are easier to load into guns during war games, since no orientation of the projectile will be required. However, the invention is readily adapted to projectiles having capsules of any shape.
  • the fill can absorb water from the capsule shell itself, causing embrittlement of this shell which is then more likely to break or rupture during handling or storage.
  • the capsules are often subject to rough handling in use and any embrittlement can cause premature failure of the capsule to release the fill at an undesirable time.
  • the capsules described herein are often designed for use in target shooting "war games”. These capsules are designed to be fired from a gun utilizing compressed air power to project the capsule from the gun at a target (such as a fellow competitor) and the capsule shells are designed to break on impact with the target to release the fill which is clearly indicative that the target or person has been hit.
  • the capsule shells have an apparent problem whereby they must be of such a composition to shatter upon impact but to be of sufficient strength to stand up to both the impact of the percussive force of compressed air from the gun in use and also the rough handling during transportation to and during the "game".
  • An additional problem is that such games occur outdoors often in cold, unpleasant weather conditions whereby the polyethylene glycol contents of the fill may either expand or, occasionally, freeze due to the cold conditions. This expansion can result in undue stress being applied to the capsule shell which may either rupture or produce stressed areas of weakness which are more prone to rupture during the handling of the capsules.
  • silicone oil such as dimethylpolysiloxane or methylphenylpolysiloxane
  • the silicone oil content in the gelatin capsule shell reduces the effects of water absorbtion from the capsule shell thus reducing the embrittlement of the capsule shell whereas the silicone content in the fill reduces both the freezing point of fill liquid and the expansion coefficient of the fill. Therefore the content of silicone oil in both the shell and the liquid fill is desirable and it has been found that the silicone oil content will diffuse across the capsule shell/liquid fill boundary in order to seek an equilibrium of silicone oil across this boundary with the result that there is a residual silicone oil content retained in both the capsule shell and in the fill, even if the silicone oil is only added directly to one or other of the capsule shell or the fill.
  • the silicone oil content is mixed directly with the gelatin shell composition and separately mixed with the liquid fill content in the desired concentrations.
  • the grade of silicone oil is chosen so as not to markably effect the conventional properties of the liquid fill and will normally have viscosity of 0.5 to 10,000 centistokes and, most preferably, between 1 and 100 centistokes.
  • the quantity of silicone oil added to the capsule shell and liquid fill is sufficient to provide an equilibrium content of silicone oil in the capsule of between 0.01% and 20% of the dry actual weight of the capsule shell (i.e. not including water driven off during the normal processing and drying out of the capsule after capsulation).
  • the liquid fill contains between 0.1 to 30% silicone oil depending on the other ingredients and their propensity to expand or become solid as the temperature drops.
  • the liquid fill comprises up to 100% silicone oil, with no other ingredients except colourants.
  • the increased content of silicone oil in the liquid fill will substantially reduce its freezing point.
  • composition for manufacturing projectiles for use in target shooting is as follows:
  • Gelatin comprising:- gelatin content of 85 kilograms, glycerol 17 kilograms, sorbitol (70%) 19 kilograms, silicone oil 4 kilograms and water 80 kilograms; with the liquid fill comprising polyethylene glycol 950 kilograms, glycol 15 kilograms, silicone oil 50 kilograms, colourant 18 kilograms, opacifier 3 kilograms and water 30 kilograms.
  • This composition will then be used to provide projectiles with the liquid fill of approximately 2,800mgs in a shell of approximately 450mgs.
  • This example incorporates the inclusion of silicone oil in both the gelatin shell and the liquid fill.
  • the capsule shell weight may vary between 40 and 1,000mgs with the associated fill weight between 60 and 4,000mgs.
  • the glycerine and sorbitol incorporated in the above example will be considered to act as plasticisers for the gelatin, whereas the colouring agent and the opacifier are simply for cosmetic appearances to provide colour to the capsule.
  • many of these capsules are often used in war games whereby each side in the game may be allocated a different coloured projectile in order to ascertain which team has scored a hit as a result of observing the colour of the fill from a capsule which has shattered on impact. The colour of the capsule shell will then reflect the colour of the fill (alternatively, the capsule shell may be opaque to show the fill colour).
  • this basic description of the invention is by way of example only whereby the invention is not restricted to the specific silicone oils referred to, nor to any one known encapsulation process for making soft gelatin capsule shells with a liquid fill.
  • this invention is to be typically applied to projectiles used for firing from an air powered gun although other types of projection may be employed to rapidly accelerate the projectile without breaking it during this acceleration.
  • the projectiles of this type are spherical with a diameter of approximately 1.5cm with the capsule wall thickness approximately 1 to 2 mm.
  • this invention may be applied to the manufacturing projectile of a wide variety of different sizes and shape, having different wall thicknesses and liquid fill contents.
  • plasticizers other than glycerine and sorbitol, may be employed.
  • the manufacture of soft gelatin capsules is well known to those in the trade whereby the exact composition of each gelatin mix may vary for different techniques, the resultant gelatin capsules simply meeting the requirement that they do not break when subject to the pressurized gas source when firing and are capable of breaking when hitting the target.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Medicinal Preparation (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Manufacturing Of Micro-Capsules (AREA)

Claims (7)

  1. Geschoss, das eine hohe Beschleunigung bei Beaufschlagung mit einer starken Stoßkraft verträgt, bestehend aus einer weichen Gelatinekapselhülle und einer Flüssigkeitsfüllung, bei der sowohl die Kapselhülle als auch die Füllung ein Silikonöl enthalten, dadurch gekennzeichnet, dass die Kapselhülle 0,01 Gew.-% bis 20 Gew.-% Silikonöl enthält.
  2. Geschoss gemäß Anspruch 1 mit einer Kapselhülle mit einem Gewicht zwischen 40 und 1000 mg.
  3. Geschoss gemäß einem beliebigen der vorhergehenden Ansprüche mit einem Füllungsgewicht zwischen 60 und 4000 mg.
  4. Geschoss gemäß einem beliebigen der vorhergehenden Ansprüche, bei der die besagte Füllung 0,01 Gew.-% bis 100 Gew.-% Silikonöl enthält.
  5. Geschoss gemäß einem beliebigen der vorhergehenden Ansprüche, bei der die besagte Füllung 0,01 Gew.-% bis 30 Gew.-% Silikonöl enthält.
  6. Geschoss gemäß einem beliebigen der vorhergehenden Ansprüche, bei dem besagtes Silikonöl Dimethyl Polysiloxan bzw. Methylphenyl Polysiloxan enthält.
  7. Verfahren zur Herstellung eines Geschosses gemäß einem beliebigen der Ansprüche 1 bis 7, in dem besagtes Silikonöl sowohl in der besagten Kapselhülle als auch in der besagten Flüssigkeitsfüllung enthalten ist, bei dem das besagte Silikonöl sowohl mit der besagten Mischung für die Gelatinekapselhülle als auch der besagten flüssigen Füllung vermischt wird, um ein Silikonöl-Gleichgewicht in der Grenzschicht Kapselhülle/Füllung einzustellen, wobei die besagte Mischung für die Gelatinekapselhülle zu wenigstens zwei Teilen einer Kapselhülle verformt und die besagte Füllung in die besagten Teile der Kapselhülle eingeschlossen wird, wonach die besagte Kapsel versiegelt wird.
EP97300052A 1996-01-24 1997-01-07 Zusammensetzung einer Gelatinekapselhülle in einem zielmarkierenden Geschoss und Herstellungsverfahren einer solchen Kapselhülle Expired - Lifetime EP0786641B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9601411 1996-01-24
GB9601411A GB2309509B (en) 1996-01-24 1996-01-24 Improvements in gelatin capsules for use as projectiles

Publications (2)

Publication Number Publication Date
EP0786641A1 EP0786641A1 (de) 1997-07-30
EP0786641B1 true EP0786641B1 (de) 2000-09-13

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Application Number Title Priority Date Filing Date
EP97300052A Expired - Lifetime EP0786641B1 (de) 1996-01-24 1997-01-07 Zusammensetzung einer Gelatinekapselhülle in einem zielmarkierenden Geschoss und Herstellungsverfahren einer solchen Kapselhülle

Country Status (5)

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EP (1) EP0786641B1 (de)
AU (1) AU708023B2 (de)
CA (1) CA2195716A1 (de)
DE (1) DE69703051D1 (de)
GB (1) GB2309509B (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5885671A (en) * 1997-07-17 1999-03-23 R.P. Scherer North America Polyoxyalkylene glycol gelatin capsule fill formulations comprising crosslinked carboxylic copolymers
US8920918B2 (en) * 2005-10-31 2014-12-30 Kee Action Sports Technology Holdings, Llc Oil and polyethylene glycol fill material for use in paintball shells
CN114485291A (zh) * 2022-02-15 2022-05-13 中国人民解放军北部战区总医院 单兵配备电子信号干扰着色粘滞弹
US12186389B2 (en) 2022-10-28 2025-01-07 Glaxosmithkline Biologicals Sa Nucleic acid base vaccine against emerging SARS-CoV-2 variants

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2741434A1 (fr) * 1995-11-17 1997-05-23 Giat Ind Sa Procede de dispersion ou d'application d'un materiau actif et composition mise en oeuvre pour un tel procede

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1268635A (en) 1968-04-25 1972-03-29 Scherer Ltd R P Capsules for marking objects
FR1599474A (de) * 1968-12-27 1970-07-15
US4656092A (en) * 1985-10-15 1987-04-07 R. P. Scherer Corporation Target shooting capsules
JPH02306913A (ja) * 1989-05-19 1990-12-20 Tokai Kapuseru Kk 軟カプセル剤
US5063057A (en) * 1990-09-26 1991-11-05 Elizabeth Arden Co., Division Of Conopco, Inc. Cosmetic capsules
US5353712A (en) * 1991-12-31 1994-10-11 Olson Christy L Marking pellet gun and rigid, fracturable pellet therefor
US5393054A (en) * 1994-03-09 1995-02-28 Zap Paintball Corporation Paint ball

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2741434A1 (fr) * 1995-11-17 1997-05-23 Giat Ind Sa Procede de dispersion ou d'application d'un materiau actif et composition mise en oeuvre pour un tel procede

Also Published As

Publication number Publication date
GB2309509A (en) 1997-07-30
CA2195716A1 (en) 1997-07-25
GB2309509B (en) 1998-12-02
DE69703051D1 (de) 2000-10-19
EP0786641A1 (de) 1997-07-30
AU708023B2 (en) 1999-07-29
AU1222197A (en) 1997-07-31
GB9601411D0 (en) 1996-03-27

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