Pharmaceutical packaging apparatus, method of determining remaining quantity of pharmaceutical packaging paper and pharmaceutical packaging paper roll

A combination of a medicine packaging apparatus and a medicine packaging sheet roll having a core tube provided with a storage medium disposed inside the core tube,

• the medicine packaging apparatus comprising:
• a rotation amount information outputting section for an output of rotation amount information as an indication of a rotation amount of a rotating shaft portion to which the medicine packaging sheet roll is attached;
• an information reading section for writing information to and reading the written information from the storage medium provided inside the core tube of the medicine packaging sheet roll;
• an information generation section for generating, as information writable to the storage medium, based on the rotation amount information output from the rotation amount information outputting section:
• rotation amount information at a reference time-point upon unwinding of a packaging sheet by a predetermined length from the medicine packaging sheet roll attached to the rotating shaft portion ;
• one or a plural pieces of rotation amount information at a respective packaging sheet in-use time-point after the reference time-point upon unwinding of the packaging sheet by the predetermined length from the medicine packaging sheet roll;
• and an amount of sheet used from the reference time-point through the packaging sheet in-use time-point;
• and
• a remaining sheet amount estimation section for estimation of a current amount of remaining sheet based on the rotation amount information at the reference time-point , the rotation amount information at the packaging sheet in-use time point after the reference time-point , the amount of sheet used from the reference time-point through the packaging sheet in-use time-point, and dimensional information of the core tube.