Method of manufacturing core of cuff for blood pressure meter and cuff for blood pressure meter

A cuff for blood pressure meter, comprising:

• an air bag;
• a core disposed outside the air bag including
• a flexible sheet-like first core, and
• a second core which is formed into an arc shape over an angle of about 300°, which is stacked on and attached to the first core, and which curves the first core;
• fixing means for maintaining a condition where one end of the first core is wound into other end of the first core;
• and
• tightening means for tightening the first core and the second core onto a part of a living body including
• a tightening belt provided in a state wound around an outer periphery of the first core or the second core,
• a knob, and
• a release lever,
• wherein
• the second core has a shape maintaining property such that a maximum diameter of the second core is automatically restored by a resilience of the shape maintaining property when the second core is released from a tightened and diametrically reduced state, the second core has a fixing plate fixed onto an outer surface of the first core, and two belt portions extending from the fixing plate and
• the belt portions having a width shorter than a width of the first core.