US5087993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic recording and reproducing apparatus with adjustable capstan speed
Assignee: Canon Inc
•
Filing: 1990-04-23
•
Granted: 1992-02-11
•
Expires: 2010-04-23
Abstract
Abstract A magnetic recording and reproducing apparatus is arranged to be loaded with a supply reel and a take-up reel with a magnetic tape wound around them, to move the tape from the supply reel to the take-up reel by driving and rotating forward the two reels and a capstan with the tape pushed into contact with the capstan and to rewind the tape moving it from the take-up reel back to the supply reel by driving and rotating these reels and the capstan backward. The apparatus is provided with means for detecting the rotating speed of the supply reel in rewinding the tape; and control means for controlling and changing the rotation speed of the capstan according to the detected rotating speed of the supply reel during the process of rewinding the tape.
Inventors
- 👤 Junji Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:22
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/18; G11B15/46
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
127 words
A recording and reproducing apparatus comprising: (a) a supply reel and a take-up reel for supplying and taking up a tape; (b) reel driving means for driving said two reels; (c) a capstan; (d) capstan driving means for driving said capstan to transport the tape from said supply reel to said take-up reel in a forward tape transporting mode, and rewinding the tape from said take-up reel to said supply reel in a backward tape transporting mode; (e) detecting means for detecting the rotating speed of said supply reel in rewinding the magnetic tape; and (f) control means for controlling and varying the rotating speed of said capstan, during a tape rewinding mode, according to the rotating speed of said supply reel detected by said detecting means.
Claim 2
Dependent Claim
127 words
A recording and reproducing apparatus comprising: (a) a supply reel and a take-up reel for supplying and taking up a tape; (b) reel driving means for driving said two reels; (c) a capstan; (d) capstan driving means for driving said capstan to transport the tape from said supply reel to said take-up reel in a forward tape transporting mode, and rewinding the tape from said take-up reel to said supply reel in a backward tape transporting mode; (e) detecting means for detecting the rotating speed of said supply reel in rewinding the magnetic tape; and (f) control means for controlling and varying the rotating speed of said capstan, during a tape rewinding mode, according to the rotating speed of said supply reel detected by said detecting means.
Claim 3
Dependent Claim
14 words
An apparatus according to claim 1, wherein said detecting means includes a photo sensor.
Claim 4
Dependent Claim
13 words
An apparatus according to claim 1, wherein said control means includes a microcomputer.
Claim 5
Dependent Claim
79 words
A recording and/or reproducing apparatus comprising: (a) a supply reel and a take-up reel around which a tape is wound; (b) transport means for transporting the tape between said two reels; (c) detecting means for detecting a parameter which corresponds to the transport speed of the tape; and (d) control means for controlling and varying the transport speed of the tape transported by said transport means in a predetermined mode according to a detection output of said detecting means.
Claim 6
Dependent Claim
79 words
A recording and/or reproducing apparatus comprising: (a) a supply reel and a take-up reel around which a tape is wound; (b) transport means for transporting the tape between said two reels; (c) detecting means for detecting a parameter which corresponds to the transport speed of the tape; and (d) control means for controlling and varying the transport speed of the tape transported by said transport means in a predetermined mode according to a detection output of said detecting means.
Claim 7
Dependent Claim
13 words
An apparatus according to claim 4, wherein said transport means includes a capstan.
Claim 8
Dependent Claim
25 words
An apparatus according to claim 4, wherein said transport means includes driving means for driving at least one of said two reels and a capstan.
Claim 9
Dependent Claim
20 words
An apparatus according to claim 4, wherein said parameter relates to the rotating speed of one of said two reels.
Claim 10
Dependent Claim
24 words
An apparatus according to claim 4, wherein said parameter relates to the coil diameter of the tape coiled on one of said two reels.
Claim 11
Dependent Claim
25 words
An apparatus according to claim 4, wherein said parameter functionally relates to the winding force of one of said two reels exerted on the tape.
Claim 12
Dependent Claim
13 words
An apparatus according to claim 4, wherein said control means includes a microcomputer.
Claim 13
Dependent Claim
14 words
An apparatus according to claim 4, wherein said predetermined mode is a rewinding mode.
Claim 14
Dependent Claim
15 words
An apparatus according to claim 4, wherein said predetermined mode is a fast feeding mode.
Claim 15
Dependent Claim
117 words
A driving device comprising: a) a reel member around which a tape-shaped recording medium is wound; b) first driving means for transporting said tape-shaped recording medium; c) second driving means for winding said tape-shaped recording medium transported by said first driving means by rotating said reel member; d) detecting means for detecting a rotating state of said reel member; and e) control means capable of setting a first driving mode in which said first driving means is driven at a constant speed to transport said tape-shaped recording medium at a constant speed and a second driving mode in which the driving speed of said first driving means is varied according to an output of said detecting means.
Claim 16
Dependent Claim
117 words
A driving device comprising: a) a reel member around which a tape-shaped recording medium is wound; b) first driving means for transporting said tape-shaped recording medium; c) second driving means for winding said tape-shaped recording medium transported by said first driving means by rotating said reel member; d) detecting means for detecting a rotating state of said reel member; and e) control means capable of setting a first driving mode in which said first driving means is driven at a constant speed to transport said tape-shaped recording medium at a constant speed and a second driving mode in which the driving speed of said first driving means is varied according to an output of said detecting means.
Claim 17
Dependent Claim
28 words
A device according to claim 13, wherein, said tape-shaped recording medium is transported at a higher speed in said second driving mode than in said first driving mode.
Claim 18
Dependent Claim
58 words
A device according to claim 14, wherein said detecting means is arranged to detect the coil diameter of said tape-shaped recording medium wound around said reel member by detecting the rotating speed of said reel member, and wherein the driving speed of said first driving means is controlled and varied according to an output of said detecting means.
Claim 19
Dependent Claim
14 words
A device according to claim 15, wherein said first driving means includes a capstan.
Claim 20
Dependent Claim
26 words
A device according to claim 15, wherein said reel member is one of a pair of reel members around which said tape-shaped recording medium is wound.
References Cited (Backward Citations)
US4521815A
Cited
JPS6378359A
Cited
JPS6396762A
Cited
JPS63112851A
Cited
JPS63296450A
Cited
JPH01138645A
Cited
US4989112A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-02-10 | 1995-08-12 | 1996-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-02-10 | 1999-08-12 | 2000-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-02-10 | 2003-08-12 | 2004-02-11 | $7700.00 | Window Closed / Lapsed |