Fuji Photo Film Company, Limited

Toshikazu Kaji

Mitsukazu Hosoya

Shuji Ajimu

A film carrier which, with a simple structure, can accurately check whether a reading head and a recording head are operating appropriately. Data for checking is determined in advance, and when a negative film begins to be withdrawn, direct current voltage is applied to the recording head. A leading end of the negative film is detected. Thereafter, the negative film is conveyed a fixed amount, the recording head records the data for checking, and the reading head reads recorded data. Next, read data and the data for checking are compared. When the read data and the data for checking do not match, it is determined that there is an abnormality in the recording head or the reading head, and error processing is carried out.

Method of checking magnetic heads, and film carrier

In an information recording and reproducing apparatus which conveys a film in which one of a magnetic recording portion and an optical recording portion is provided while guiding the film by a conveying guide and which causes a magnetic or optical head to follow an end surface of the film in a transverse direction thereof, which fishtails, when a portion of at least one edge following surface which abuts a side edge of the film constantly slides on a straight-line portion of the side edge of the film, the relative positional relationship between the one of the magnetic recording portion and the optical recording portion and the magnetic or optical head can be maintained in a fixed state even when the edge following surface passes over a concave portion formed on the side edge of the film. Further, recording or reading of one of magnetic information and optical information can be correctly effected and also the film is not damaged.

Growing community of inventors

Kanagawa, Japan

Toshikazu Kaji