Method for manufacturing seamless capsule

A method of making a seamless capsule formed by encapsulating a filler material with a capsule shell material, said method comprising:

• a step of preparing a concentric multiple nozzle having a center nozzle and an annular nozzle concentrically surrounding said center nozzle;
• a step of storing a liquid filler material in a first tank;
• a step of storing a liquid capsule shell material in a second tank at a predetermined first temperature by which said liquid capsule shell material maintains a substantially constant viscosity;
• a step of preparing a curing bath for storing a curing liquid adapted to cure said liquid capsule shell material by coming into contact therewith;
• a step of supplying said liquid filler material from said first tank to said center nozzle of said concentric multiple nozzle and supplying said liquid capsule shell material from said second tank to said annular nozzle of said concentric multiple nozzle;
• a step of forming a droplet by cutting a flow of said liquid filler material caused to flow out of said center nozzle and a flow of said liquid capsule shell material caused to flow out of said annular nozzle and flow about said flow of said filler material;
• and
• a step of bringing said capsule shell material of said droplet from said concentric multiple nozzle into contact with said curing liquid stored in said curing bath so as to cure said capsule shell material;
• wherein, while transferring said liquid capsule shell material from said second tank to said annular nozzle of the temperature of the concentric multiple nozzle, the temperature of the capsule shell material is caused to rise with a substantially constant temperature gradient by heating during said transferring so as to attain a predetermined second temperature, higher than said first temperature, when entering said annular nozzle.