Magnetics-on-film image area recording head with film flattening emulsion side support
Patent 5519464 Issued on May 21, 1996. Estimated Expiration Date: 
November 30, 2014. 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.
November 30, 2014. 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 3157868 3218077 3648941 3682486 Tape pad for use in magnetic recording tape cassette Thin layered magnetic head Magnetic head Pressure pad, particularly for magnetic tapes Camera apparatus for magnetically recording on film Self-clocking encoding/decoding film information exchange system using dedicated magnetic tracks on film InventorsApplicationNo. 346995 filed on 11/30/1994US Classes:396/319, Magnetically on film or film cassette360/1, RECORDING ON OR REPRODUCING FROM AN ELEMENT OF DIVERSE UTILITY360/130.3Pressure elementExaminersPrimary: Mathews, A. A.Attorney, Agent or FirmInternational ClassesG03B 017/24G11B 005/48 AbstractMagnetic recording and/or reproducing heads particularly for use for recording and reading information on a magnetics-on-film (MOF) layer in the image area of photographic filmstrips exhibiting a cross-film curvature in cameras or other filmstrip handling apparatus. A magnetic record/reproduce multi-head array is formed of a plurality of magnetic head elements mounted to extend across the width of the filmstrip and across the filmstrip image frame area, each head element contacting the magnetic layer at a predetermined cross-film position in a film transport path. The surfaces of the head elements aligned to contact the filmstrip magnetic layer are burnished or lapped by an abrasive tape lapping of the head as a final contouring operation on the head to remove all edges that can scrape or scratch the magnetic surface of the filmstrip. An elongated, compliant backing support, e.g. a free wheeling roller, pad or brush, having a low friction contact surface, is positioned to bear against the filmstrip emulsion layer opposite to the multi-head array. Light pressure is applied through the backing support to conform the filmstrip magnetic layer to the magnetic head elements in the cross-film and film advance directions. | |
