Manufacturing method of liquid containing container

A manufacturing method of a liquid containing container for manufacturing a liquid containing container by using a mold for liquid blow molding, an intermediate conveying device, a rotary conveying machine and a rotary capper, the capper having a container holding portion configured to be displaced at a constant first velocity in a circumferential direction of a first central axis, and the rotary conveying machine having a carrier configured to be displaced at a second velocity in a circumferential direction of a second central axis;

• the method comprising:
• a liquid blow molding step of supplying a pressurized liquid into a preform disposed in a cavity of the mold to mold the preform into a container body having a barrel containing the liquid;
• an intermediate conveying step of, after the mold is opened, gradually accelerating the container body to a third velocity and delivering the container body to the carrier of the rotary conveying machine by the intermediate conveying device;
• a rotary conveying step of conveying the container body and delivering the container body to the container holding portion of the capper by the carrier of the rotary conveying machine;
• and
• a capping step of attaching a cap to a mouth continuous with the barrel of the container body while the container body is conveyed by the container holding portion of the capper.