Patent ID: 7131828

Claim:
A rotary type-tabletting machine in which powder material is sequentially applied onto molding material contacting surfaces of dies provided on a turntable, upper punches and lower punches, and said upper punches and lower punches reciprocate up and down for tabletting while rotating along a rotary orbit in synchronism with rotary movement of said turntable, comprising: a powder material application apparatus mounted on upper surface of said turntable between a tablet discharge position and a molding material charging position of said rotary type tabletting machine, said powder material application apparatus comprising: a powder material spray opening for lower punch communicating with a powder material supply port for supplying powder material mixed with air via a first communication passage, and a powder material spray opening for upper punch communicating with said powder material supply port via a second communication passage, said powder material spray opening for upper punch being of elongated shape along the rotary orbit of said upper punches and longer than said powder material spray opening for lower punch, wherein said powder material spray opening for lower punch and powder material spray opening for upper punch are different in their structure, and wherein said powder material sprayed from said powder material spray opening for upper punch is applied upward onto said molding material contacting surface of said upper punch when said upper punch passes above said powder material spray opening for upper punch, whereas powder material sprayed from said powder material spray opening for lower punch is applied downward onto said molding material contacting surfaces of said lower punch and said die when said lower punch and said die reach said powder material spray opening for lower punch.