Patent EP0107166A1 successfully refreshed from Google Patents.
EP0107166A1
Expired / Lapsed
EP
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Tape driving control apparatus
Assignee: Panasonic Holdings Corp
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Filing: 1983-10-18
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Granted: —
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Expires: 2003-10-18
Abstract
Abstract @ This invention is directed to a tape driving control apparatus wherein the leading end portion and its vicinity or the trailing end portion and its vicinity of the magnetic tape is detected when the magnetic tape is wound at a high speed around the reel on the winding side from the reel on the feed side by a pair of reel motors, and the tape speed is made lower in the leading end portion and its vicinity or in the trailing end portion and its vicinity, and is made higher in the tape central portion thereby to shorten the winding time and to render to reduce noises of the reel rotation.
Inventors
- 👤 Tadashi Yoshino
- 👤 Masayuki Mamei
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 04:46
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/18; G11B15/26; G11B15/32; G11B15/46; G11B15/48; G11B15/54
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
154 words
A tape driving control apparatus comprising a feed reel stand, a winding reel stand, revolution information detecting means for detecting the revolution information in accordance with the respective revolution numbers of the feed reel stand and the winding reel stand, a mixing circuit for adding, as voltages, the revolution information of said both revolution-information detecting means, a means for comparing the outputs of the mixing means with reference signals, a controlling means for controlling the revolution number of a winding reel motor driving said winding reel . stand in accordance with the comparison output, a tape-winding-diameter detecting means for detecting that at least the tape-winding-diameter of said winding reel is a given diameter or less with the use of the revolution information of said both revolution-information detecting means, and a speed varying means for varying either the output of said mixing circuit of the reference signal by the output of the tape-winding-diameter detecting means.
Claim 2
Dependent Claim
154 words
A tape driving control apparatus comprising a feed reel stand, a winding reel stand, revolution information detecting means for detecting the revolution information in accordance with the respective revolution numbers of the feed reel stand and the winding reel stand, a mixing circuit for adding, as voltages, the revolution information of said both revolution-information detecting means, a means for comparing the outputs of the mixing means with reference signals, a controlling means for controlling the revolution number of a winding reel motor driving said winding reel . stand in accordance with the comparison output, a tape-winding-diameter detecting means for detecting that at least the tape-winding-diameter of said winding reel is a given diameter or less with the use of the revolution information of said both revolution-information detecting means, and a speed varying means for varying either the output of said mixing circuit of the reference signal by the output of the tape-winding-diameter detecting means.
Claim 3
Dependent Claim
188 words
The tape driving control apparatus in accordance with Claim 1, wherein further comprises a tape comparing means, which compares the revolution information of said both revolution information detecting means to generate the inversion output when both of the revolution information are equal, and an up/down counter, which count up the output of said tape diameter comparing means before the inversion with the output of the revolution-information detecting means on the feed side (or on the winding side) as the input of the up/down counter, and counts down the output of said tape diameter comparing means after the inversion with the output of the revolution information detecting means on the winding side (or on the feed side) as the input of the up/down counter, the tape-winding-diameter detecting means being adapted to switch the reference signal value so that the number of the revolution of the reel motor on the winding side for driving the reel stand on the winding side may be increased in the periods of a first specific value (N1) during the count-up operation and of a second specific value (N 2 ) during the count-down operation.
Claim 4
Dependent Claim
65 words
The tape driving control apparatus in accordance with Claim 1, wherein there provides a reference signal which is adapted to be guided to a comparing circuit through a low-pass filter so that said reference signal for controlling in speed the number of the revolution of the -reel motor on the winding side driving a reel stand on the winding side may not be varied suddenly.
Claim 5
Dependent Claim
70 words
The tape driving control apparatus in accordance with Claim 1, wherein said tape-winding-diameter detecting means is composed of a detecting means for comparing the revolution information of both said revolution-information detecting means to produce the output when both said revolution information is more in difference than the predetermined value, and switches the mixing ratio of both the signals in said mixing circuit due to the output of the detecting means.
References Cited (Backward Citations)
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