US4872154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for recording indicia for indicating presence or absence of error in medium after error checking and apparatus therefor
Assignee: Canon Inc
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Filing: 1987-09-17
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Granted: 1989-10-03
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Expires: 2007-09-17
Abstract
Abstract There is disclosed an information record method comprising the steps of recording information in one record area of an information record medium having a plurality of record areas, reproducing the recorded information and checking error thereof, and recording an indicia indicating absence of error at a portion of the record area in accordance with an error check result. An information record apparatus used for the above method comprises a device for recording information on an information record medium having a plurality of record areas, a device for moving the record device to a record area to which information is to be recorded, a device for reproducing the information recorded in the record area, a device for checking error based on the reproduced information, and a device for recording an indicia for indicating absence of error at a portion of the record area in accordance with error check result.
Inventors
- 👤 Wataru Sakagami
- 👤 Katsumi Iijima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:06
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/10; G11B20/18; G11B20/1883; G11B7/00; G11B7/002; G11B7/0033; G11B7/004
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
65 words
A method for recording information comprising the steps of: recording information in a first recording area of an information recording medium, the information recording medium having a plurality of recording areas; reproducing the recorded information and error-checking the reproduced information; and recording an indicia indicating absence of error at a portion of the first recording area in accordance with the result of the error-checking step.
Claim 2
Independent Claim
65 words
A method for recording information comprising the steps of: recording information in a first recording area of an information recording medium, the information recording medium having a plurality of recording areas; reproducing the recorded information and error-checking the reproduced information; and recording an indicia indicating absence of error at a portion of the first recording area in accordance with the result of the error-checking step.
Claim 3
Dependent Claim
43 words
A method for recording information according to claim 1, further comprising the step of detecting presence or absence of the indicia in the first recording area prior to recording of the information and selecting a different recording area when the indicia is detected.
Claim 4
Dependent Claim
51 words
A method for recording information according to claim 2, wherein said plurality of recording areas include a plurality of tracks arranged in parallel on the medium, and selecting a recording track which is two tracks ahead of a first recording track when the indicia is detected in the first recording track.
Claim 5
Dependent Claim
18 words
A method for recording information according to claim 1 wherein said indicia is in a form of line.
Claim 6
Dependent Claim
17 words
A method for recording information according to claim 1 wherein said indicia is a series of dots.
Claim 7
Dependent Claim
18 words
A method for recording information according to claim 1, wherein the medium is a card-like optical recording medium.
Claim 8
Dependent Claim
85 words
An information recording apparatus comprising: recording means for recording information on an information recording medium having a plurality of recording areas; drive means for driving said recording means to one of the recording areas; reproducing means for reproducing the information recorded in the recording area error check means for checking an error of the reproduced information; and indicia recording means for recording an indicia indicating absence of error at a portion of the recording area in accordance with an output of said error check means.
Claim 9
Dependent Claim
85 words
An information recording apparatus comprising: recording means for recording information on an information recording medium having a plurality of recording areas; drive means for driving said recording means to one of the recording areas; reproducing means for reproducing the information recorded in the recording area error check means for checking an error of the reproduced information; and indicia recording means for recording an indicia indicating absence of error at a portion of the recording area in accordance with an output of said error check means.
Claim 10
Dependent Claim
57 words
An information recording apparatus according to claim 7, further comprising detection means for detecting presence or absence of the indicia in the recording area prior to recording of the information, and control means for activating said drive means in accordance with the output of said indicia detection means to drive said recording means to other recording areas.
Claim 11
Dependent Claim
46 words
An information recording apparatus according to claim 7, wherein the medium is an optical recording medium, and said recording means is an optical head including a light source and an optical system for focusing a light emitted from said light source onto the optical recording medium.
Claim 12
Dependent Claim
25 words
An information recording apparatus according to claim 9, wherein said reproducing means is a photo-detector for serving a light reflected by the optical recording medium.
Claim 13
Dependent Claim
25 words
An information recording apparatus according to claim 9, wherein the medium is card-like and the recording areas are tracks arranged in parallel on the medium.
Claim 14
Dependent Claim
17 words
An information recording apparatus according to claim 9 wherein said drive means is a head drive motor.
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USPTO Annuity & Maintenance Windows
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|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-10-02 | 1993-04-03 | 1993-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-02 | 1997-04-03 | 1997-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-02 | 2001-04-03 | 2001-10-03 | $7700.00 | Window Closed / Lapsed |