Patent ID: 7553436

Claim:
A rotary press machine, comprising: a plurality of pairs of upper and lower punches; a plurality of dies, each of said lower punches being movable in a respective one of said dies to selectively enable formation of a cavity in said die; a feeding system for feeding powder material into said cavities of said dies in a feeding stage, said feeding system being arranged to feed the powder material into each of said dies only when said die forms a cavity; a pressing system for pressing said upper and lower punches together in a pressing stage; a tablet ejection system for ejecting formed tablets from said dies in a tablet ejection stage, said pairs of upper and lower punches being rotated sequentially through said feeding stage, said pressing stage and said tablet ejection stage; and an adjustment mechanism for enabling selective formation of said cavities by said dies such that when said cavities are formed, said feeding system is able to feed powder material into said dies and when said cavities are not formed, said feeding system does not feed powder material into said dies.