Mouthpiece assembly for an inhalation device including a replaceable substrate component, and a replaceable substrate component therefor

An elongate substrate component for a mouthpiece assembly of an inhalation device, said substrate component comprising an elongate base and an essentially planar substrate to a region of one side of which has been applied a resistive heater element over which is then disposed one or more amounts of an aerosolisable formulation on or proximate said region whereby said formulation can be aerosolised when said resistive heater is supplied with an excitation energy,

• said elongate substrate component further comprising an elongate cover including at least one substantially planar surface in which at least one elongate slot is provided throughout the depth of said cover, said planar substrate being sandwiched between said elongate cover and said elongate base so as to be contained within said substrate component,
• said at least one elongate slot:
• being provided in a location which at least partially coincides with said region of said substrate whereby said region of said substrate is exposed through said elongate slot;
• and being oriented longitudinally within said elongate cover so as to be substantially aligned with the longitudinal axis thereof;
• wherein said aerosolisable formulation takes the form of at least one globule of one of:
• a viscous liquid, a gel and a solid which is liquified upon heating, and
• wherein said one or more globules being substantially contained within said at least one elongate slot such that upon aerosolization, aerosol produced from the said at least one globule is mixed directly into that fluid which is both immediately above said at least one globule and extant within the said at least one elongate slot.