Magnetics-on-film image area recording head with film flattening emulsion side support

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 5519464





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Magnetic 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.

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Patent Owner(s)

Patent OwnerAddressTotal Patents

International Classification(s)


Inventor Name Address # of filed Patents Total Citations
Brock, George W La Jolla, CA 30 341
Czarnecki, Wlodzimierz S Rancho Santa Fe, CA 10 88
Gandola, Kent R Carlsbad, CA 7 44

Cited Art Landscape

Patent Info (Count) # Cites Year
Other [Check patent profile for assignment information] (1)
* 4922361 Pressure pad, particularly for magnetic tapes 11 1988
* 4933780 Camera apparatus for magnetically recording on film 33 1988
* 4977419 Self-clocking encoding/decoding film information exchange system using dedicated magnetic tracks on film 92 1988
* 5034836 Magnetic head suspension apparatus for use with a photographic film 29 1989
* 5041933 Magnetic head suspension apparatus for use with a photographic film 18 1989
* 5006873 Implicit mid roll interrupt protection code for camera using dedicated magnetic tracks on film 36 1989
* 5025283 Magnetic recording on film of scene parameters and photofinishing process for use therewith 26 1990
* 5285324 Magnetic head-to-recording medium support apparatus 16 1991
* 5276472 Photographic film still camera system with audio recording 161 1991
* 5231438 Camera with interlock for cover piece and cartridge light shield 62 1991
* 5274522 Magnetic head-to-media backer device 21 1992
* 5285325 Web guiding device for use in a magnetic reading and/or recording apparatus 16 1992
* 5450149 Photographic camera and method for recording magnetic data on film 23 1994
* 4669016 Thin layered magnetic head 8 1985
* 4612593 Tape pad for use in magnetic recording tape cassette 3 1982
* 4910629 Magnetic head 8 1988
* 5307100 Magnetic recording/reproducing apparatus for a camera having pressure roller 45 1993
* 5344730 Method of recording information on a photographic film 42 1993
Hutchinson Technology Incorporated (1)
* 5282102 Gimbal for magnetic head suspension systems 37 1992
Canon Kabushiki Kaisha (2)
* 5146378 Multi-track head 8 1991
* 5321452 Magnetic head for a camera featuring multiple, varied-sized head portions 18 1992
* Cited By Examiner

Patent Citation Ranking

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Patent Info (Count) # Cites Year
* 5815756 Film positioning apparatus 1 1997
8958175 Tape head surface with non-uniform cross-width profile 0 2014
* 5828506 Magnetic head interface having a single narrow band of contact for longitudinal edge track record/reproduce on magnetics-on-film (MOF) 0 1996
* 6233407 Camera with magnetic roller recorder for repetitively recording information along magnetic track on filmstrip 0 1996
* 5671454 Head to film interface for photofinishing equipment 0 1996
* 5749006 Camera for recording images on a photographic film or on a magnetic tape 13 1997
6321040 System and method of scanning, viewing and writing information on a magnetic layer of photosensitive film 13 1998
* Cited By Examiner