US5270727A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for image formation
Assignee: Mitsubishi Paper Mills Ltd
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Filing: 1991-03-06
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Granted: 1993-12-14
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Expires: 2011-03-06
Abstract
Abstract A method for forming an image on a dye. The dye absorbing visible light of a first wavelength, but not visible light of a second wavelength. The dye is decolorized when visible light of the first and second wavelength irradiate the dye simultaneously. Decolorization will be effected only if visible light of the first wavelength and visible light of the second wavelength are simultaneously applied. The method utilizes lasers as the source of the visible light of the first and second wavelengths; thus insuring formation of high resolution images.
Inventors
- 👤 Kyonosuke Yamamoto
- 👤 Kazuo Yokoyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:20
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/28; B41M5/286; G; G03; G03C; G03C7/00; G03C7/02
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
94 words
A method for forming an image comprising the steps of: providing a dye which absorbs a first laser beam at a first wavelength and does not absorb a second laser beam at a second wavelength; and simultaneously irradiating said dye with said first laser beam of said first wavelength and said second laser beam of said second wavelength to decolorize said dye; and wherein said dye can only be decolorized when said first laser beam of said first wavelength and said second laser beam of said second wavelength are applied to said dye simultaneously.
Claim 2
Independent Claim
94 words
A method for forming an image comprising the steps of: providing a dye which absorbs a first laser beam at a first wavelength and does not absorb a second laser beam at a second wavelength; and simultaneously irradiating said dye with said first laser beam of said first wavelength and said second laser beam of said second wavelength to decolorize said dye; and wherein said dye can only be decolorized when said first laser beam of said first wavelength and said second laser beam of said second wavelength are applied to said dye simultaneously.
Claim 3
Dependent Claim
36 words
A method for forming an image as in claim 1, wherein said first laser beam of said first wavelength and said second laser beam at said second wavelength are supplied by first and second lasers respectively.
Claim 4
Dependent Claim
23 words
A method as in claim 2, wherein said first laser is an Ar + laser and said second laser is an excimer laser.
Claim 5
Independent Claim
92 words
A method for forming an image on a dye which absorbs a first laser beam at a first wavelength and does not absorb a second laser beam at a second wavelength, wherein said dye can only be decolorized when said first laser beam of said first wavelength and said second laser beam of said second wavelength are applied to said dye simultaneously, said method comprising the step of simultaneously irradiating said dye with a laser beam of said first wavelength and a laser beam of said second wavelength to decolorize said dye.
Claim 6
Independent Claim
92 words
A method for forming an image on a dye which absorbs a first laser beam at a first wavelength and does not absorb a second laser beam at a second wavelength, wherein said dye can only be decolorized when said first laser beam of said first wavelength and said second laser beam of said second wavelength are applied to said dye simultaneously, said method comprising the step of simultaneously irradiating said dye with a laser beam of said first wavelength and a laser beam of said second wavelength to decolorize said dye.
Claim 7
Independent Claim
122 words
A method for forming an image on a dye which absorbs a first laser beam at a first wavelength and does not absorb a second laser beam at a second wavelength, wherein said dye can only be decolorized when said first laser beam of said first wavelength and said second laser beam of said second wavelength are applied to said dye simultaneously, said method comprising the steps of: continuously irradiating said dye with one of said first laser beam of said first wavelength and said second laser beam of said second wavelength; and irradiating said dye with the other one of said first laser beam of said first wavelength and said second laser beam of said second wavelength to decolorize said dye.
Claim 8
Independent Claim
122 words
A method for forming an image on a dye which absorbs a first laser beam at a first wavelength and does not absorb a second laser beam at a second wavelength, wherein said dye can only be decolorized when said first laser beam of said first wavelength and said second laser beam of said second wavelength are applied to said dye simultaneously, said method comprising the steps of: continuously irradiating said dye with one of said first laser beam of said first wavelength and said second laser beam of said second wavelength; and irradiating said dye with the other one of said first laser beam of said first wavelength and said second laser beam of said second wavelength to decolorize said dye.
Claim 9
Dependent Claim
36 words
A method for forming an image as in claim 5, wherein said first laser beam of said first wavelength and said second laser beam of said second wavelength are supplied by first and second lasers respectively.
Claim 10
Dependent Claim
23 words
A method as in claim 6, wherein said first laser is an Ar + laser and said second laser is an excimer laser.
Claim 11
Independent Claim
91 words
A method for forming an image comprising the steps of: providing a dye which absorbs a first laser beam at a first wavelength and does not absorb a second laser beam at a second wavelength, said dye only being decolorized when said first laser beam of said first wavelength and said second laser beam of said second wavelength are applied to said dye simultaneously; and simultaneously irradiating said dye with said first laser beam of said first wavelength and said second laser beam of said second wavelength to decolorize said dye.
Claim 12
Independent Claim
91 words
A method for forming an image comprising the steps of: providing a dye which absorbs a first laser beam at a first wavelength and does not absorb a second laser beam at a second wavelength, said dye only being decolorized when said first laser beam of said first wavelength and said second laser beam of said second wavelength are applied to said dye simultaneously; and simultaneously irradiating said dye with said first laser beam of said first wavelength and said second laser beam of said second wavelength to decolorize said dye.
Claim 13
Dependent Claim
36 words
A method for forming an image as in claim 8, wherein said first laser beam of said first wavelength and said second laser beam of said second wavelength are supplied by first and second lasers respectively.
Claim 14
Dependent Claim
23 words
A method as in claim 9, wherein said first laser is an Ar + laser and said second laser is an excimer laser.
Claim 15
Independent Claim
85 words
A method for image formation which comprises the step of irradiating a portion of a dye layer provided on a support simultaneously and coincidently with a first laser beam having a wavelength range which the dye layer absorbs and a second laser beam having a wavelength range which the dye layer does not absorb to decolorize the portion of the dye layer, wherein irradiating the dye layer with only one of the first and second laser beams does not cause decolorization of the dye layer.
Claim 16
Independent Claim
85 words
A method for image formation which comprises the step of irradiating a portion of a dye layer provided on a support simultaneously and coincidently with a first laser beam having a wavelength range which the dye layer absorbs and a second laser beam having a wavelength range which the dye layer does not absorb to decolorize the portion of the dye layer, wherein irradiating the dye layer with only one of the first and second laser beams does not cause decolorization of the dye layer.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-12-13 | 1997-06-14 | 1997-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-12-13 | 2001-06-14 | 2001-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-12-13 | 2005-06-14 | 2005-12-14 | $7700.00 | Window Closed / Lapsed |