US5085970A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image forming method
Assignee: Fujifilm Corp
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Filing: 1990-09-13
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Granted: 1992-02-04
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Expires: 2010-09-13
Abstract
Abstract A method for forming an image is disclosed which comprises providing a photosensitive material comprising at least one light-sensitive layer and having a gamma value of not less than 10 and a capability of being handled under bright light, subjecting said light-sensitive layer image-wise exposure to light having substantially exclusive of wavelengths of 370 nm or shorter through originals, for example, a line original and a halftone original arranged in a superposed condition, followed by contrast development processing, whereby excellent quality of images, for example, letter images, can be obtained.
Inventors
- 👤 Kimitaka Kameoka
- 👤 Ken-ichi Kuwabara
- 👤 Toshiro Takahashi
- 👤 Shigenori Moriuchi
- 👤 Morio Yagihara
- 👤 Yoshio Inagaki
- 👤 Keiichi Adachi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:11
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/015; G03C1/06; G03C1/08; G03C1/76; G03C1/815; G03C5/00; G03C5/02
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
136 words
A method for forming an image, which comprises providing a photosensitive material comprising at least one light-sensitive silver halide emulsion layer and having a γ value greater than 10, the capability of being handled under bright light, and subjecting said light-sensitive layer to image-wise exposure to light substantially exclusive of wavelengths of 370 nm or shorter, said image-wise exposure to light being substantially exclusive of wavelengths of 370 nm or shorter is effected by a least one of positioning an optical filter for ultraviolet absorption between a light source and the photosensitive material and using a light source not having emission energy in a wavelength region below 370 nm, wherein a hydrazine derivative is contained in at least one of said light-sensitive silver halide emulsion layer or in another hydrophilic colloid layer of the photosensitive material.
Claim 2
Independent Claim
136 words
A method for forming an image, which comprises providing a photosensitive material comprising at least one light-sensitive silver halide emulsion layer and having a γ value greater than 10, the capability of being handled under bright light, and subjecting said light-sensitive layer to image-wise exposure to light substantially exclusive of wavelengths of 370 nm or shorter, said image-wise exposure to light being substantially exclusive of wavelengths of 370 nm or shorter is effected by a least one of positioning an optical filter for ultraviolet absorption between a light source and the photosensitive material and using a light source not having emission energy in a wavelength region below 370 nm, wherein a hydrazine derivative is contained in at least one of said light-sensitive silver halide emulsion layer or in another hydrophilic colloid layer of the photosensitive material.
Claim 3
Dependent Claim
59 words
A method as in claim 1, wherein said photosensitive material has a light-sensitive emulsion layer comprising a silver chloride emulsion or a silver chlorobromide emulsion having a chloride content of 80 mole % or more, and said emulsion contains a water-soluble rhodium salt in an amount of from 1×10 -7 to 1×10 -4 mole per mole of silver halide.
Claim 4
Dependent Claim
28 words
A method as in claim 1, wherein said imagewise exposure is effected by putting an optical filter for ultra-violet absorption between a light source and said photosensitive material.
Claim 5
Dependent Claim
59 words
A method as in claim 3, wherein said photosensitive material has a light-sensitive emulsion layer comprising a silver chloride emulsion or a silver chlorobromide emulsion having a chloride content of 80 mole % or more, and said emulsion contains a water-soluble rhodium salt in an amount of from 1×10 -7 to 1×10 -4 mole per mole of silver halide.
Claim 6
Dependent Claim
28 words
A method as in claim 1, wherein said imagewise exposure is effected by using a light source not having emission energy in a wavelength region below 370 nm.
Claim 7
Dependent Claim
59 words
A method as in claim 5, wherein said photosensitive material has a light-sensitive emulsion layer comprising a silver chloride emulsion or a silver chlorobromide emulsion having a chloride content of 80 mole % or more, and said emulsion contains a water-soluble rhodium salt in an amount of from 1×10 -7 to 1×10 -4 mole per mole of silver halide.
Claim 8
Dependent Claim
23 words
A method as in claim 1, wherein the grains of said silver halide emulsion are formed at a pH of 6 or less.
Claim 9
Dependent Claim
23 words
A method as in claim 2, wherein the grains of said silver halide emulsion are formed at a pH of 6 or less.
Claim 10
Dependent Claim
23 words
A method as in claim 1, wherein the grains of said silver halide emulsion are formed at a pH of 5 or less.
Claim 11
Dependent Claim
23 words
A method as in claim 2, wherein the grains of said silver halide emulsion are formed at a pH of 5 or less.
Claim 12
Independent Claim
113 words
A method for forming an image, which comprises providing a photosensitive material comprising at least one light-sensitive silver halide emulsion layer and an ultraviolet absorbent having an absorption peak in the wavelength region of from 300-400 nm in an amount which reduces the intrinsic sensitivity of the silver halide emulsion at a wavelength of 360 nm to 1/2 or less and having a γ value greater than 10, the capability of being handled under bright light, and subjecting said light-sensitive layer to image-wise exposure to light, wherein a hydrazine derivative is contained in at least one of said light-sensitive silver halide emulsion layer or in another hydrophilic colloid layer of the photosensitive material.
Claim 13
Independent Claim
113 words
A method for forming an image, which comprises providing a photosensitive material comprising at least one light-sensitive silver halide emulsion layer and an ultraviolet absorbent having an absorption peak in the wavelength region of from 300-400 nm in an amount which reduces the intrinsic sensitivity of the silver halide emulsion at a wavelength of 360 nm to 1/2 or less and having a γ value greater than 10, the capability of being handled under bright light, and subjecting said light-sensitive layer to image-wise exposure to light, wherein a hydrazine derivative is contained in at least one of said light-sensitive silver halide emulsion layer or in another hydrophilic colloid layer of the photosensitive material.
Claim 14
Dependent Claim
58 words
A method as in claim 11, wherein said photosensitive material has a light-sensitive emulsion layer comprising a silver chloride emulsion or a silver chlorobromide emulsion having a chloride content of 80 mole % or more, and said emulsion contains a water-soluble rhodium salt in an amount of from 1×10 -7 to 1×10 -4 mole of a silver halide.
References Cited (Backward Citations)
GB1274365A
Cited
US4168977A
Cited
US4362809A
Cited
US4416522A
Cited
US4452882A
Cited
GB2131190A
Cited
EP0138200B1
Cited
EP0164120A2
Cited
US4722884A
Cited
US4619892A
Cited
US4803149A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-02-03 | 1995-08-05 | 1996-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-02-03 | 1999-08-05 | 2000-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-02-03 | 2003-08-05 | 2004-02-04 | $7700.00 | Window Closed / Lapsed |