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As a result, the melt puddle covers a larger area of the drum, which in turn forms a larger area of ribbon. [9] PFC is commonly cast in a vacuum to avoid oxidation of the molten material, which would affect the quality of the resulting product. Ribbons up to 200 mm wide have been industrially achieved using PFC. [12]
Magnetic-tape tape recorders record sound by magnetizing particles of ferromagnetic material, typically iron oxide (rust), coated on thin ribbons of plastic tape (or, originally, fragile paper tape). The tape coating is magnetized by dragging it over the surface of a small recording head (typically the size of a sugar cube) which contains an ...
Voice coils wound with flattened wire, called ribbon-wire, provide a higher packing density in the magnetic gap than coils with round wire. Some coils are made with surface-sealed bobbin and collar materials so they may be immersed in a ferrofluid which assists in cooling the coil, by conducting heat away from the coil and into the magnet ...
Reel of magnetic audiotape A damaged cassette tape. Sticky-shed syndrome is a condition created by the deterioration of the binders in a magnetic tape, which hold the ferric oxide magnetizable coating to its plastic carrier, or which hold the thinner back-coating on the outside of the tape. [1] This deterioration renders the tape unusable. [2]
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Magnetic Abrasive Finishing refers to using 1 μm - 2 mm iron particles mixed with an abrasive to apply the machining force through manipulation of the particles with a magnetic field. The magnetic particle and abrasive mixture is commonly referred to the "magnetic brush" because it appears and behaves similar to a wire brush.
The ribbons and the substrate are electrically conductive so that the deflection of the ribbon can be controlled in an analog manner: When the voltage of the active ribbons is set to ground potential, all ribbons are undeflected, and the device acts as a mirror so the incident light returns along the same path. When a voltage is applied between ...
Magnetic-tape data storage is a system for storing digital information on magnetic tape using digital recording. Tape was an important medium for primary data storage in early computers, typically using large open reels of 7-track , later 9-track tape.