The Experts below are selected from a list of 153 Experts worldwide ranked by ideXlab platform
H. Osaki - One of the best experts on this subject based on the ideXlab platform.
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mechanisms of head clogging by particulate magnetic Tapes in helical scan video Tape Recorders
IEEE Transactions on Magnetics, 1994Co-Authors: H. Osaki, J Kurihara, T KanouAbstract:The head-clogging processes of video heads by particulate magnetic Tapes in helical scan video Tape Recorders were investigated by continuous microscopic observations of the rotating video heads using a stroboscope. It was found that most wear debris of typical Tapes is expelled out of the rubbing surface of a video head and piles up on non-contact area of the exit side of the head. The wear debris which forms an agglomerate contacts a Tape surface, and is deposited on the Tape surface. The following head picks it up on the rubbing surface (contact area) where the magnetic gap is located. A spacing loss occurs with a consequential decrease in reproduced voltage. >
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Wear mechanisms of Co-Cr sputter deposited magnetic Tapes in helical scan video Tape Recorders
IEEE Transactions on Magnetics, 1993Co-Authors: H. Osaki, H. Uchiyama, N. HondaAbstract:The wear mechanisms of Co-Cr sputter-deposited Tapes for perpendicular magnetic recording by rotary video heads in the still mode of video Tape Recorders were investigated by using two kinds of experimental apparatus. One is a rotary-head-type friction tester in which the surface of the rotating head can be observed continuously by a microscope with a stroboscope synchronized with the head rotation; the other is a scratch tester in which the scratched surface of a Tape specimen can be observed in situ through the transparent hemispheric slider. It was found that the wear debris of the Co-Cr layer transfers onto the head surface, forms the asperities on the head, and scars the Tape surface, with the increasing amount of head tracing. A carbon protective layer can prevent the Co-Cr layer from transferring onto the head and being subsequently scarred. However, the carbon protective layer may be peeled by the rotating head when the frictional force increases up to the interfacial shearing strength between the carbon layer and the Co-Cr layer.
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wear mechanism of particulate magnetic Tapes in helical scan video Tape Recorders
IEEE Transactions on Magnetics, 1992Co-Authors: H. Osaki, T Kanou, E Oyanagi, H Aonuma, J KuriharaAbstract:The wear process of particulate magnetic Tapes by rotary heads in video Tape Recorders was investigated. It was found that the plastic flow of the polymer binder in the top layer on the surface asperities (low swellings) of a magnetic layer of a Tape caused by head rubbing forms the smoothed surface. The increase in the real contact area on these surfaces asperities by smoothing creates a frictional force increase up to the shear strength of the asperities. When the frictional force exceeds that strength, the asperities are fractured by the shear stress. The wear debris from many fractured asperities gathers into large lumps and retransfers onto the Tape surface. The increased frictional force between a rotating head and retransferred lumps of wear debris with an increasing number of head traces causes a larger shear fracture inside a magnetic layer under the retransferred lumps. Wear debris from the scars made by large shear fracture, combined with retransferred lumps, scratches the Tape surface as a prow. >
P. Skritek - One of the best experts on this subject based on the ideXlab platform.
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ICASSP - Measurement of nonlinear distortions in Tape Recorders and electro-acoustic transducers applying T.I.M. test signals
ICASSP '82. IEEE International Conference on Acoustics Speech and Signal Processing, 1Co-Authors: P. SkritekAbstract:Measurement procedures for transient intermodulation distortions (TIM) have been extended and applied to magnetic Tape Recorders, high-frequency loudspeakers and microphones. The tests proved as a good measure for high-frequency compression distortions in Tape Recorders. Squarewave/ sine test signals can be used for unified VU-meter calibration in Tape Recorders and for specification of peak-power handling of high-frequency loudspeakers (tweeters). Thermally forced fluctuation in the sound pressure of tweeters is described.
J Kurihara - One of the best experts on this subject based on the ideXlab platform.
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mechanisms of head clogging by particulate magnetic Tapes in helical scan video Tape Recorders
IEEE Transactions on Magnetics, 1994Co-Authors: H. Osaki, J Kurihara, T KanouAbstract:The head-clogging processes of video heads by particulate magnetic Tapes in helical scan video Tape Recorders were investigated by continuous microscopic observations of the rotating video heads using a stroboscope. It was found that most wear debris of typical Tapes is expelled out of the rubbing surface of a video head and piles up on non-contact area of the exit side of the head. The wear debris which forms an agglomerate contacts a Tape surface, and is deposited on the Tape surface. The following head picks it up on the rubbing surface (contact area) where the magnetic gap is located. A spacing loss occurs with a consequential decrease in reproduced voltage. >
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wear mechanism of particulate magnetic Tapes in helical scan video Tape Recorders
IEEE Transactions on Magnetics, 1992Co-Authors: H. Osaki, T Kanou, E Oyanagi, H Aonuma, J KuriharaAbstract:The wear process of particulate magnetic Tapes by rotary heads in video Tape Recorders was investigated. It was found that the plastic flow of the polymer binder in the top layer on the surface asperities (low swellings) of a magnetic layer of a Tape caused by head rubbing forms the smoothed surface. The increase in the real contact area on these surfaces asperities by smoothing creates a frictional force increase up to the shear strength of the asperities. When the frictional force exceeds that strength, the asperities are fractured by the shear stress. The wear debris from many fractured asperities gathers into large lumps and retransfers onto the Tape surface. The increased frictional force between a rotating head and retransferred lumps of wear debris with an increasing number of head traces causes a larger shear fracture inside a magnetic layer under the retransferred lumps. Wear debris from the scars made by large shear fracture, combined with retransferred lumps, scratches the Tape surface as a prow. >
T Kanou - One of the best experts on this subject based on the ideXlab platform.
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mechanisms of head clogging by particulate magnetic Tapes in helical scan video Tape Recorders
IEEE Transactions on Magnetics, 1994Co-Authors: H. Osaki, J Kurihara, T KanouAbstract:The head-clogging processes of video heads by particulate magnetic Tapes in helical scan video Tape Recorders were investigated by continuous microscopic observations of the rotating video heads using a stroboscope. It was found that most wear debris of typical Tapes is expelled out of the rubbing surface of a video head and piles up on non-contact area of the exit side of the head. The wear debris which forms an agglomerate contacts a Tape surface, and is deposited on the Tape surface. The following head picks it up on the rubbing surface (contact area) where the magnetic gap is located. A spacing loss occurs with a consequential decrease in reproduced voltage. >
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wear mechanism of particulate magnetic Tapes in helical scan video Tape Recorders
IEEE Transactions on Magnetics, 1992Co-Authors: H. Osaki, T Kanou, E Oyanagi, H Aonuma, J KuriharaAbstract:The wear process of particulate magnetic Tapes by rotary heads in video Tape Recorders was investigated. It was found that the plastic flow of the polymer binder in the top layer on the surface asperities (low swellings) of a magnetic layer of a Tape caused by head rubbing forms the smoothed surface. The increase in the real contact area on these surfaces asperities by smoothing creates a frictional force increase up to the shear strength of the asperities. When the frictional force exceeds that strength, the asperities are fractured by the shear stress. The wear debris from many fractured asperities gathers into large lumps and retransfers onto the Tape surface. The increased frictional force between a rotating head and retransferred lumps of wear debris with an increasing number of head traces causes a larger shear fracture inside a magnetic layer under the retransferred lumps. Wear debris from the scars made by large shear fracture, combined with retransferred lumps, scratches the Tape surface as a prow. >
Y Mizoh - One of the best experts on this subject based on the ideXlab platform.
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wear of tribo elements of video Tape Recorders
Wear, 1996Co-Authors: Y MizohAbstract:The helical scan magnetic recording equipment, like the video Tape Recorders (VTR), consist of many tribo-elements. The wear of these tribo-elements is an essential problem affecting the reliability of the equipment. The rotating magnetic head in high-speed rubbing with the magnetic Tape needs a self-cleaning effect by mild wear. A simple trial of reducing the head wear often brings partial recession, friction polymer and brown stain. The summary of the current study of head wear is given by dividing it into the head factors, the Tape factors, the system factors and the atmosphere factors. The computational analysis of head contour change caused by wear is compared with the experimental results. The outline of the tribology of motor, capstan and Tape path in the VTR is introduced.
