Photography – With data recording – Magnetically on film or film cassette
Reexamination Certificate
1998-06-10
2001-09-25
Gray, David M. (Department: 2851)
Photography
With data recording
Magnetically on film or film cassette
C396S390000
Reexamination Certificate
active
06295417
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an apparatus such as a camera or the like capable of using a film having a magnetic recording part.
2. Description of Related Art
There is disclosed in Japanese Laid-Open Patent Application No. HEI 4-68329 a camera having the function in which a magnetic signal is recorded by a magnetic head at each film frame exposed (used for taking a shot) and, in a case where the film cartridge is taken out from the camera before all frames of the film cartridge are exposed and is again loaded on the camera later, the leader of unexposed frames of the film is searched out and discriminated from exposed frames by detecting the presence or absence of the magnetic signal.
Further, a camera disclosed in Japanese Patent Application No. HEI 7-156713 is arranged to actuate a magnetic detecting means in a state of having no magnetic recording part, i.e., while a film is not thrust out from a film cartridge, and to decide whether the above function of re-loading a halfway-used film cartridge is performable or not, according to the amount of information (noise) detected by the magnetic detecting means.
Further, a camera disclosed in Japanese Patent Application No. HEI 8-199078 is arranged to have the function of re-loading a halfway-used film and to control an action of searching out the leader part of unexposed frames by judging the presence or absence of a magnetic reproduced signal according to its effective value.
However, none of the examples cited above states anything about the compatibility of detection of magnetic reproduced signals with detection of perforations of a film. More specifically, none of them discloses any arrangement in which the magnetic reproduced signals and the film perforations are detected by one control circuit such as a microprocessor.
BRIEF SUMMARY OF THE INVENTION
In accordance with one aspect of the invention, there is provided an apparatus, such as a camera, adapted for a film having a magnetic recording part, which comprises a detecting device which detects perforations of the film, a magnetic head which performs at least one of reading and writing of information from or into the magnetic recording part of the film, and a microprocessor which performs processing of a signal detected by the detecting device and processing of a signal read or to be written by the magnetic head, the microprocessor A/D-sampling the signal detected by the detecting device, so that processing actions both on the signal for the perforations of the film and the signal for the magnetic head can be appropriately performed by using the microprocessor in common for these signal processing actions.
The above and other aspects of the invention will become apparent from the following detailed description of a preferred embodiment thereof taken in connection with the accompanying drawings.
REFERENCES:
patent: 4996549 (1991-02-01), Yamaguchi
patent: 5521666 (1996-05-01), Kazami
patent: 5574520 (1996-11-01), Ishihara
patent: 5612757 (1997-03-01), Amano
patent: 5614969 (1997-03-01), Izukawa
patent: 5649253 (1997-07-01), Cocca
patent: 5727240 (1998-03-01), Mizumoto et al.
patent: 5732299 (1998-03-01), Yoshizawa et al.
patent: 5839008 (1998-11-01), Tanaka et al.
patent: 5845166 (1998-12-01), Fellegara et al.
Canon Kabushiki Kaisha
Gray David M.
Robin Blecker & Daley
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