Inspection device, ptp packaging machine and ptp sheet manufacturing method

A Press Through Package (PTP) sheet manufacturing method for manufacturing a PTP sheet, the method comprising:

• forming a pocket portion in a container film that is conveyed in a belt-like manner;
• filling an object into the pocket portion;
• mounting a cover film onto the container film to close the pocket portion;
• separating the PTP sheet from a belt-like body obtained by mounting the cover film to the container film;
• and
• inspecting for inclusion of another object of a different type, wherein
• the inspecting comprises:
• irradiating the object with near-infrared light;
• dispersing reflected light from the irradiated object;
• taking a spectroscopic image of the dispersed light;
• obtaining spectral data of a plurality of points on the object, based on the spectroscopic image;
• defining a group of similar spectral data from among the spectral data of the plurality of points;
• extracting a group having a largest number of spectral data from the defined group;
• calculating an average of the spectral data of the extracted group;
• and
• detecting a type of the object using a predetermined analysis of the object, based on the average.