Film cassette with magnetic film leader
September 12, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2289740 2674009 Multiple film type motion picture projection Reproducing of interspersed motion-picture scenes and still shots Means for post-production film-making Photographic film unit System for controlling distinct devices in a theater Camera for use with film having sprocket holes and/or coded perforations Photographic film assemblage having a non-lighttight film withdrawal opening Film cassette and a photographing device using the same InventorApplicationNo. 07/242567 filed on 09/12/1988US Classes:396/210, EXPOSURE DATA FROM FILM ITSELF352/235, With leader352/236, With film-carried indicia352/78R, Magazines352/92, WITH FILM CARRIED CONTROL SIGNALS396/319, Magnetically on film or film cassette396/512Film cassette or cartridgeExaminersPrimary: Hix, L. T.Assistant: Brown, Brian W. Attorney, Agent or FirmInternational ClassesG03B 17/24 (20060101)G03B 17/30 (20060101) AbstractA film cassette contains a film spool which is rotatable in an unwinding direction to propel a filmstrip including an integral film leader out of the cassette and is rotatable in a winding direction to wind the filmstrip including its film leader back into the cassette. The film leader has a magnetic area on which alterable data can be magnetically written and read to indicate whether the filmstrip is completely exposed or is only partially exposed. Thus, when the film leader is wound into the cassette the data will be protected and when the film leader is propelled from the cassette the data will be made accessible to read and alter it. | |
