Patent ID: 6011931
Filing Date: 2000-01-04
Classification: G03B,G11B

Abstract:
An apparatus for preventing magnetic recording errors in an advanced photo system camera using film having magnetic material on one side, comprising:film transport sensing means provided on the side of the film having magnetic material for detecting a perforation in a film and for generating an output signal for each detected perforation, wherein the film transport sensing means includes a first sensing unit for detecting a perforation in a leading end portion of the film and for generating a first sensing signal for indicating each detected perforation and a second sensing unit for detecting a perforation in a trailing end portion of the film and for generating a second sensing signal for indicating each detected perforation;control means for outputting a control signal and for determining whether noise has occurred in the transport sensing means output signal while the film is being advanced, and, when noise occurs in the transport sensing means output signal, the control means delaying the enablement of the control signal for a predetermined period of time, wherein the control means includes a means for determining whether a level of the second sensing signal has changed, said change being indicative of noise, a means for initializing counters when the level of the second sensing signal has changed, a means for determining whether a level of the first sensing signal has changed, and means for determining whether noise has occurred in the first sensing signal when the level of the first sensing signal has changed; andmagnetic recording means for magnetically recording the photographic data on the film when the control signal is enabled and preventing recording of photographic data on the film.