Emulsion side backer support plate assembly for magnetics-on-film read/write head
February 13, 2015. 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 3747938 Read-write head back-up member Integral shield and bias element for magnetic tape cassettes Magnetic cassette tape record and play apparatus Magnetic recording tape cartridge Magnetic tape cassette Magnetic shielding spring Magnetic tape backing leaf spring assembly particularly for compact cassettes Cassette pressure pad improvement Tape cartridge InventorApplicationNo. 387668 filed on 02/13/1995US Classes:396/319, Magnetically on film or film cassette355/40Identifying, composing, or selectingExaminersPrimary: Blankenship, Howard B.Attorney, Agent or FirmInternational ClassG03B 017/24AbstractA magnetic read/write head and backer plate assembly particularly for use for recording and reading information on a magnetics-on-film (MOF) layer in the image area of photographic filmstrips. The backer plate assembly overcomes the loss of compliance of the MOF layer to a head gap when the filmstrip is wrapped about the contoured surface of the magnetic head sufficiently to exceed the bending moment of the filmstrip. A relatively movable backer plate has a support region that assumes the contoured surface shape on engagement with the filmstrip emulsion layer opposite to the magnetic head and is curved until restrained at its free ends and restrained at a location in the support region opposite to the head gap by a resilient pad to thereby restore compliance along the line of contact of the head gap. | |
