Abstract:
A liquid container (10) has a base (12) and a cap (14) which interengage to form a hermetically sealed chamber (42). The cap (14) has a curved outer wall (18) and the base has a curved inner wall (36). The outer and inner walls (18, 36) have perspective non-circular portions and are of complementary shape. The cap (14) is able to be rotated axially relative to the base (12) by means of a handle (24) so that the outer and inner curved walls (18, 36) interact such that the cap (14) is released from the base (12) upon axial rotation thereof and the hermetic seal is broken.
Abstract:
A liquid container (10) has a base portion (12) and a cap portion (14) which are engaged with one another for relative slidable linear movement. The cap has an upwardly facing recess (29). Initially, the cap portion (12) and the base portion (13) define a hermetically sealed chamber (42) containing a liquid (40). Upon relative movement of the cap portion (14) and the base portion (12), the base enters the chamber (42) and the hermetic seal is broken so that the liquid (40) is urged into the recess (29) of the cap portion (14).
Abstract:
An apparatus (10) for determining the adhesive strength of materials has a test rig (12) with a base plate (14). A compression plate (20) is provided above a support (18). The compression plate (20) is urged into engagement with the support (18) by means of springs (22). The compression plate (20) has a recess (30) which receives a mould (32). The support (18) contains a substrate (34) which engages with material to be tested contained in the mould (32).The application also relates to a method which involves measuring the force required to remove the mould (32) from the substrate (34).
Abstract:
A container (10) for mixing and dispensing material comprises a body (12) having a main chamber (17), a dispensing nozzle (26), a liquid receptacle (16) and a plunger (18). The liquid receptacle (16) has a front portion arranged to break away upon hydraulic pressure being applied by the plunger (18) so that the plunger (18) can traverse the entire length of the body (12). This enables a charge of material in the main chamber (17) to be entirely dispensed through a frangible wall (22) into the nozzle (26). The container (10) has a compression zone with a stepped region (50) to provide limited resistance to movement for use with low viscosity material. This reduces the risk of uncontrolled extrusion of the low viscosity material.
Abstract:
A container (10) for mixing components comprises a main body (12) defining a main chamber (17) and a liquid receptacle (16) and a plunger (18). The main chamber (17) has a distal end (26) which has an end cap (28). The main chamber (17) has a central aperture (30) sealed by a frangible membrane (38). In use, the plunger (18) causes liquid in the liquid receptacle (16) to be pushed through an internal wall (22) containing a weakened portion (24) into the main chamber (17) which contains a powder.The liquid and powder are mixed to form a paste. The paste is accessed by an applicator which breaks the frangible membrane (38).The container is especially envisaged for use in mixing of components to provide a paste for dental use.
Abstract:
An apparatus and method for determining the tensile strength of dental materials utilizing a mould. The dental material is placed in the mould and is adhered to a surface. The mould containing the dental material is then engaged with a pulling device which subjects the mould to a measured force to disengage the dental material from the surface. This provides a measure of the tensile strength of the dental material.
Abstract:
A dental treatment tray device comprising a horseshoe shaped insert with peripheral front and rear walls 16 defining a trough shaped device 12 in cross section with an Intermediate base layer. The front and rear walls 14 and 15 and the base layer are lined by means of gauze impregnated with dental treatment material 18.
Abstract:
A dental capsule (10) for storing a dental powder component (13) and a liquid component (28) in separated condition in which the powder component (13) is contained in a chamber (17) and the liquid component (28) is contained in a pouch (18). The capsule (10) comprises a freely movable member (36) arranged to rupture the pouch (18) upon vibration of the capsule (10) so that the liquid component (28) admixes with the powder component (13) to form a dental paste (38). The compartment of the capsule has a manually removable cap (14) to enable the dental paste (38) to be retrieved for use.