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US 4,366,510 AGranted
Video signal recording and/or reproducing device
AssigneeSony Corporation
InventorsYuji Watanabe, Hiroyuki Hayashi
Life of this patent
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AssigneeSony Corporation
InventorsYuji Watanabe, Hiroyuki Hayashi
Estimating the term…
A magnetic recording and reproducing device including two video tape recording and reproducing portions each of which have tape systems including supply reels, rotatable head drum assemblies, a tape drive capstan, a take-up reel, and wherein said tapes can be driven in either the forward or reverse directions and normally are driven intermittently and alternately in the forward direction and subsequently alternately and intermittently in the reverse direction with means for providing a longitudinal control signal on said tapes in both the forward and reverse directions as well as means for recording slant video tracks alternately on the tapes during a time when a particular tape is stopped and with adjacent slant tracks on one tape being the odd fields, and the adjacent slant tracks on the other tape being even fields, and wherein between each recording in one direction is spaced a sufficient distance apart from the next recording so that intermittent recording can be placed therebetween when the direction of the tapes are reversed, and wherein the control tracks provide for synchronization of various functions of the machine.
A magnetic recording and reproducing device comprising two video tape recording and reproducing parts, each having a tape running system including a supply reel, a rotatable head drum assembly, a take-up reel, a capstan for moving said tape in either longitudinal direction of said tape, a control head in the tape path of each of said tapes over which at least one marginal edge of each of said tapes rides, each of said control heads having upper and lower recording/reproducing portions which are mounted opposite to the upper and lower portions of their respective associated tapes, means for transporting said tapes backward and forward in a selected time interval, means for recording control signals on each of said tapes during a recording control signal mode, means for recording in slant tracks video signals on each of said tapes during a video signal mode, said two tape recording and reproducing parts alternately operating so that one records and reproduces odd fields and the other records and reproduces even fields of the video signal, and said means for transporting said tapes alternately holding one tape stationary while the other tape is driven and during said selected time interval alternately driving said two video tapes in the forward direction for one half of said selected time interval and then alternately driving said two tapes in the backward direction for the remaining half of said selected time inverval, and switching means for switching between said recording control signal mode and said video signal mode.
A magnetic recording and reproducing device comprising two video tape recording and reproducing parts, each having a tape running system including a supply reel, a rotatable head drum assembly, a take-up reel, a capstan for moving said tape in either longitudinal direction of said tape, a control head in the tape path of each of said tapes over which at least one marginal edge of each of said tapes rides, each of said control heads having upper and lower recording/reproducing portions which are mounted opposite to the upper and lower portions of their respective associated tapes, a pair of accumulators between said first tape running system and said second tape running system, said accumulators being constructed to temporarily store and handle varying amounts of tape resulting from the intermittent advance of said tapes, means for transporting said tapes backward and forward in a selected time interval, means for recording control signals on each of said tapes during a recording control signal mode, means for recording in slant tracks video signals on each of said tapes during a video signal mode, said two video tape recording and reproducing parts alternately operating so that one records and reproduces odd fields and the other records and reproduces even fields of the video signal, and said means for transporting said tapes alternately holding one tape stationary while the other tape is driven and during said selected time interval alternately driving said two video tapes in the forward direction for one half of said selected time interval and then alternately driving said two tapes in the backward direction for the remaining half of said selected time interval, and switching means for switching between said recording control signal mode and said video signal mode.
Dependencies are inferred from the claim text.