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Topic: Magnetic tape


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In the News (Fri 20 Oct 17)

  
  magnetic tape - Magnum Magnetics
Magnetic tape is a permanent flexible magnetic material available in strip and extrusion forms; standard or custom manufactured to satisfy specific processing requirements.
Magnetic tape is available with a variety of surfaces including adhesive.
Magnetic tape is used for fastening devices; displays; assembly devices; advertising specialties; hobbies; nameplates; printing; crafts; novelties; message boards; P.O.P. displays; instruction boards; exhibit booths; menu boards; craft displays; schedule boards; surface-mount signs; planning boards; floor signs; doodle boards; toys; games; bin markers; display boards; graphics; hand lettering; hot stamping; teaching aids; and reminders.
www.magnummagnetics.com /magnetic-tape.htm   (199 words)

  
  ANSDIT - The letter "M"
A magnetic storage in which data are magnetically recorded on the surface of a magnetic drum that rotates on its axis when in use.
The portion of magnetic tape that precedes the beginning-of-tape marker.
A magnetic storage in which data are magnetically recorded on the surface of a tape that moves longitudinally when in use.
www.ncits.org /tc_home/k5htm/m1.htm   (2158 words)

  
 Magnetic Tape Storage and Handling--What Can Go Wrong with Magnetic Media?
Magnetic tape consists of a thin layer capable of recording a magnetic signal supported by a thicker film backing.
Sticky tape and sticky shed are commonly used terms to describe the phenomenon associated with deterioration of the magnetic tape binder.
The strength of the signal recorded on a tape magnetically is directly related to the magnetic remanence of the pigment.
www.clir.org /pubs/reports/pub54/2what_wrong.html   (4108 words)

  
 Magnetic tape at sticketape.com
Magnetic tape with a clear acrylic adhesive is recommended for bonding to smooth surfaces.
Magnetic Tape - Clear Adhesive - 12.7mm x 30m JIT Ref: 4648
Magnetic tape with a white foam adhesive is recommended for uneven bonding surfaces.
www.sticketape.com /acatalog/Magnetic_Tape.html   (357 words)

  
 Magnetic Tape Drives
Magnetic tapes are used for video, audio storage and other formats or used in general purpose data storage in a computer.
The rate at which data is written or read to the tape drive is not deterministic, the Magnetic Tape usually has the difficulty to cope with a rate at which data goes on and off the tape and the rate at which data is supplied.
The Magnetic Tape is quite and can be used to wind an average of 1/3 the tape length to move from one arbitrary data block to another.
www.mediastoragedevices.com /magnetic-tape-drives.html   (592 words)

  
  Tape Recording
High fidelity tape recording requires a high frequency biasing signal to be applied to the tape head along with the signal to "stir" the magnetization of the tape and make sure each part of the signal has the same magnetic starting conditions for recording.
When a magnetized tape passes under the playback head of a tape recorder, the ferromagnetic material in the tape head is magnetized and that magnetic field penetrates a coil of wire which is wrapped around it.
Problem: The magnetization of the magnetic emulsion is proportional to the recorded signal while the induced voltage in the coil is proportional to the rate at which the magnetization in the coil changes.
hyperphysics.phy-astr.gsu.edu /hbase/audio/tape.html   (364 words)

  
  Magnetic tape - Wikipedia, the free encyclopedia
Magnetic tape is a non-volatile storage medium consisting of a magnetic coating on a thin plastic strip.
Magnetic tape was first invented for recording sound by Fritz Pfleumer in 1928 in Germany, based on the invention of magnetic wire recording by Valdemar Poulsen in 1898.
Most tape systems attempt to alleviate the intrinsic long latency, either using indexing, where a separate lookup table is maintained which gives the physical tape location for a given data block number, or by marking blocks with a tape mark that can be detected while winding the tape at high speed.
en.wikipedia.org /wiki/Magnetic_tape   (1115 words)

  
 MEII - Magnetic Tape Drive Technologies
Guiding the tape through the tape path and across the read/write head is one of the key technologies in any tape drive.
Most tape systems have servo tracks on tape or other means that indicate the precise position of the tape relative to the head.
Minute movements of the tape are detected and fed to a positioning system that moves the head to compensate for such tape movements.
www.mountainengineering.com /tech_bd.html   (1085 words)

  
 Compact audio cassette - Wikipedia, the free encyclopedia
Although there were other magnetic tape cartridge systems at the time, the Compact Cassette became dominant as a result of Philips' decision (in the face of pressure from Sony) to license the format free of charge.
By the late 1980s, thanks to such improvements in the electronics, the tape material and manufacturing techniques, as well as dramatic improvements to the precision of the cassette shell, tape heads and transport mechanics, sound fidelity on equipment from the top manufacturers far surpassed the levels originally expected of the medium.
Cassette equipment needs regular maintenance, as cassette tape is a magnetic medium which is in physical contact with the tape head and other metallic parts of the recorder/player mechanism.
en.wikipedia.org /wiki/Compact_audio_cassette   (3483 words)

  
 Search Results for "magnetic-tape"
A magnetic tape on which sound or visual images have been recorded.
A relatively wide magnetic tape used to record visual images and associated sound for subsequent playback or broadcasting.
A small flat case containing two reels and a length of magnetic tape that winds between them, often used in audio and video recorders and players and as a medium...
www.bartleby.com /cgi-bin/texis/webinator/sitesearch?FILTER=col61&x=10&y=12&query=magnetic-tape   (320 words)

  
 magnetictape
Stroke one of the tapes with the north pole of the magnet.
The magnetic field of the magnet is strong enough to magnetize the tape.
The south pole of the tape is attracted by the north pole of the magnet, and repelled by a south pole.
www.exo.net /~pauld/activities/magnetism/magnetictape.html   (855 words)

  
 JRF Magnetic Sciences: Tape Heads-An Introduction
Magnetic head design and manufacturing has become a science in tightening tolerances, extending performance capabilities and developing new products and materials, while attempting to meet the current production requirements at both the equipment manufacturing and end user (replacement) levels.
In practical theory, magnetic heads with edge relief slots are far less susceptible to uneven edge wear problems caused by variations in tape widths and the razor sharp edges generated in the tape slitting processes.
As tape passes over the heads with sufficient wrap and tension to insure intimate stable contact, the inevitable result is going to be head wear in one form or another.
www.jrfmagnetics.com /tapeheadintro.html   (2519 words)

  
 Magnetic Carriers
Magnetic media in the form of tapes on open reel or housed in cassettes and cartridges are the most widespread carriers for audio and video data and are widely used for the storage of large quantities of computer data.
Tape in a cassette is enclosed in a shell and the two ends of the tape are securely fixed to captive spools.
With all tape formats, it is most important to obtain an absolutely flat surface of the tape pack to prevent damage to the tape edges which serve as mechanical references in the replay of many high density formats.
www.ifla.org /VI/6/dswmedia/en/txt_magn.htm   (2969 words)

  
 History of Magnetic Tape   (Site not responding. Last check: )
Tape Catches On ABC's love affair with magnetic tape soon spread to the other networks, who planned to use it to facilitate the switch from standard to daylight savings time at the end of April 1948.
Tape moved from the control room to the recording studio, where it was to have a profound effect on all forms of music and on the nation's listening habits.
While 1948 was audio tape's big year, it was also the year when 3M engineer Bob Herr proposed the idea of recording pictures as well as sound by using a wide tape at a speed of 15ips past a rapidly-rotating head assembly.
www.tvhandbook.com /History/History_tape.htm   (4141 words)

  
 Magnetic Media - Tape Cartridges, Computer Tape, Colored Diskettes, CDs, Disk Packs and Alignment, Optical Disks, DLT ...
We handle a wide range of magnetic media from all manufacturers: magnetic tape, magneto optical disks, cartridges of various kinds, including DLT, CDs, colored floppy diskettes, disk packs and CE alignment, and DLT tape labels.
In fact, we probably have whatever you're looking for, whether it's tape cartridges or DLT libraries, DVD media, CDs (compact disks), DLT IV tape, magneto optical disks or 3M tape, 8mm blank media, DVD-R, 3480, 3490E, 3570, 3590, LTO, 9840, AIT, TK50, TK70 1/4 Cartridges, 4mm/8mm Cartridges.
If you don't see what you're looking for, just contact us and we'll let you know if we have it.
www.magnetic-computer-media.com   (170 words)

  
 What is tape? - a definition from Whatis.com - see also: cartridge, magnetic tape
The magnetic tape is housed in a plastic cartridge similar to that of an audio or video cassette.
Because the tapes, which are recorded by a device called a tape drive, are portable and inexpensive to purchase, tape is often used for backing up or archiving data.
A drawback of tape is that it can only be accessed by starting at the beginning and rolling through the tape until the desired data is located.
searchstorage.techtarget.com /sDefinition/0,,sid5_gci213091,00.html   (817 words)

  
 aldorjewelry.com Magnetic tape
Magnetic tape is a non-volatile storage medium consisting of a magnetic coating on a thin plastic strip.
Magnetic tape was first invented for recording sound by Fritz Pfleumer in 1928 in Germany, based on the invention of magnetic wire recording by Valdemar Poulsen in 1898.
Magnetic tape was first used to record computer data in 1951 on the Mauchly-Eckert UNIVAC I. The recording medium was a 1/2 inch (13 mm) wide thin band of nickel-plated bronze.
www.aldorjewelry.com /magnetic-tape.htm   (788 words)

  
 What is dual-layer magnetic tape? - a definition from Whatis.com - see also: dual-side magnetic tape
Dual-layer magnetic tape, also known as dual-side magnetic tape, is a high-density storage medium with a capacity more than 15 times that of conventional magnetic tape.
According to IBM, dual-layer magnetic tape in a linear tape open (LTO) cartridge could store the same amount of data as eight million books, in a format half the size of a single VHS cassette.
Dual-layer magnetic tape drives for consumer use are expected to be on the market by 2010.
whatis.techtarget.com /gDefinition/0,294236,sid9_gci1194226,00.html   (333 words)

  
 Magnetic Tape Recording
An electric current in a coil of wire produces a magnetic field similar to that of a bar magnet, and that field is much stronger if the coil has a ferromagnetic (iron-like) core.
Tape heads are made from rings of ferromagnetic material with a gap where the tape contacts it so the magnetic field can fringe out to magnetize the emulsion on the tape.
The recording medium for the tape recording process is typically made by embedding tiny magnetic oxide particles in a plastic binder on a polyester film tape.
hyperphysics.phy-astr.gsu.edu /hbase/audio/tape2.html   (338 words)

  
 Magnetic tape Summary
Magnetic tape is a non-volatile storage medium consisting of a magnetic coating on a thin plastic strip.
Magnetic tape was first invented for recording sound by Fritz Pfleumer in 1928 in Germany, based on the invention of magnetic wire recording by Valdemar Poulsen in 1898.
Magnetic tape was first used to record computer data in 1951 on the Eckert-Mauchly UNIVAC I.
www.bookrags.com /Magnetic_tape   (1820 words)

  
 Magnetic and Audio Tape Information
At Washington D.C., the earth's magnetic field is 0.571*10**(-4) Weber/m² with a dip of 71.2 degrees, that is 0.184*10**(-4) Weber/m² horizontal and 0.541*10**(-4) Weber/m² vertical.
Print-through (also called bleed-through) is the unintentional magnetic transfer of the recording on one layer of magnetic tape to the adjacent layers (either toward the center of the reel or toward the outer edge of the reel) during storage on a reel.
By playing the tape and then not rewinding, the tape is left "flat-wound," that is, the right edge of the tape lies in a plane and thus the surface of the tape is not unduly exposed to dirt or physical forces.
vsg.cape.com /~pbaum/magtape.htm   (2395 words)

  
 Magnetic tape
The three basic materials used to make magnetic tape are (1) the base material, (2) the coating of magnetic oxide particles, and (3) the glue to bind the oxide particles onto the base material.
A magnetic tape that is improperly wound on a reel.
Magnetic tape is manufactured to have a specified output signal level (plus or minus some degree of error).
www.tpub.com /neets/book23/97.htm   (1178 words)

  
 DRPAP002: Recovery of Damaged Magnetic Tape and Optical Disk Media
The tapes should not be allowed to remain in dirty or salty water for too long as the mud or salt water may contain components, such as organics or corrosives, which may degrade the tape.
Tapes can be kept in a sealed plastic bag with a wet towel or sponge to keep them from drying out; however, unless kept cool, these tapes may experience molding if not treated within a week or two.
If the tapes have been submerged for an extended period of time, or have been recovered from the sea floor, or have been allowed to dry out after recovery from the sea, it may be necessary to place the tapes in a mild hydrochloric acid solution to remove any calcium carbonate deposits on the tape.
www.uark.edu /staff/drp/drpap002.htm   (4004 words)

  
 Magnetic Tape   (Site not responding. Last check: )
When the tape is passed across the record head and it's domains are linearized, a certain number of domains will return back to their original state of random disorganization.
Because a tapes magnetic domains are naturally in a random state of disorganization (considered as zero potential) it requires a great deal of energy to cause them to shift into organized patterns.
Tape that is biased for one frequency can still be used on a machine with a different bias frequency but the result is a lower quality recording with diminished output.
www.ptme.com /et/audio/reference/recording/magnetic.htm   (1640 words)

  
 EMC targets magnetic tape storage market - The Boston Globe
For years, big companies have used magnetic tape for data backups, because tape is much cheaper than large banks of hard drives.
Now EMC Corp. of Hopkinton is going after the magnetic tape market with a new hard-drive array that it claims will provide a superior alternative.
But instead of storing files on tape reels or cartridges, the data will be stored on the same type of inexpensive hard drive used in desktop computers.
www.boston.com /business/globe/articles/2004/04/05/emc_targets_magnetic_tape_storage_market   (458 words)

  
 Magnetic Recording History Pictures   (Site not responding. Last check: )
The tape consisted of a foil of cellulose acetate as carrier material, coated with a lacquer of iron oxide as magnetic pigment and cellulose acetate as binder.
During the 1935 Radio Fair in Berlin the Magnetophone and the Magnetic Tape were presented to the public." [quotation and diagrams from Ritter, 1988, pp.
The tape used for this recording was an improved formulation based on (Fe3O4) Ferric Oxide rather than the original Carbonal Iron which was chemically less stable and had a poor dynamic range of under 30db.
history.acusd.edu /gen/recording/tape.html   (798 words)

  
 IBM Archives: Photo album: IBM 726 Magnetic tape reader/recorder
Magnetic tapes used with the 701 Data Processing System provided a high-speed method of introducing and recording greater masses of data than were possible through either cathode ray tube or drum storage.
The magnetic tape could read or write at a rate of 12,500 digits a second and had a capacity in excess of 2 million digits a tape.
The tape used by the 726 was an oxide-coated, non-metallic tape, approximately a half-inch wide.
www-03.ibm.com /ibm/history/exhibits/701/701_1415bx26.html   (271 words)

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