Ejector holder and capsule-like cartridge therefor

Claim 1

A cartridge 10 solely operable by being mounted upon an ejector-type holder characterised in that it comprises a hollow elongated uniformly cylindrical body of predetermined length ℓand uniform diameter interiorly d 1 and exteriorly d 2 and moulded from a rigid plastics material, one end 10 1 of said body being open and formed at the extremity thereof with an annular relatively short circular exterior flange 11 of limited width ω and arranged to be detachably mounted within a complementary seat in an ejector-type holder, the opposite end of said body 10 2 being closed by a hemi-spherical wall 13 of substantially the same uniform thickness as said body, a discharge nipple 15 of the same material as the body and moulded integrally therewith and extending from said closed end of said body at an angle α to the axis AA 1 of said body to facilitate directing a discharge from the cartridge, a piston 12 1 having sidewalls closely complementary to the inner walls of said body and inserted into the open end 10 1 thereof to form a combination closure and ejecting means for material when contained in said cartridge, the inner end 12 2 of said piston 12 1 being hemi- spherical and complementary in shape to the interior surface of the closed end of said body to effect injection of substantially the entire contents of said cartridge when said piston 12 1 is fully inserted into said body of the cartridge, sealing means comprising a cup-shaped cap 14 removably connected to the outer end of the discharge nipple 15 on said body to close said outer end of the nipple to seal the contents of the cartridge against ingress of ambient atmosphere and/or any surrounding contaminating matter, and said cap being colour-coded to indicate desired properties of the contents of the cartridge.