Patent US4897330A successfully refreshed from Google Patents.
US4897330A
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Image forming method
Assignee: Konica Minolta Inc
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Filing: 1987-12-09
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Granted: 1990-01-30
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Expires: 2007-12-09
Abstract
Abstract An image forming method wherein a latent image is formed by subjecting an image retainer having a photoconductive layer to a image exposure, a toner image is formed by developing the latent image with a toner, each the step of forming the latent image and the step of forming the toner image are repeated at least one time, and a plurality of toner images formed on the image retainer to a transfer material. At least one of the toner images is formed with a toner which has a spectral transmissivity as to substantially absorb a visible light but transmit a light having a wavelength of 750 nm or more. The latent image is formed by subjecting the image retainer bearing the toner image to an image exposure with a light containing a wavelength component of 750 nm or more.
Inventors
- 👤 Hisashi Shoji
- 👤 Satoshi Haneda
- 👤 Kunihisa Yoshino
- 👤 Yuki Okuyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:51
CPC Classifications
G; G03; G03G; G03G13/00; G03G13/01; Y; Y10; Y10S; Y10S430/00; Y10S430/001; Y10S430/101
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
124 words
An image forming method comprising: uniformly exposing an image retainer having a photoconductive layer, with a light containing a wavelength component of 750 nm or more; forming a latent image by subjecting the image retainer to charging and image exposure; forming a toner image by developing said latent image with a toner; repeating at least once each of the steps of forming said latent image and forming said toner image; and transferring a plurality of toner images formed on said image retainer to a transfer material; wherein at least one of said toner images is formed with a toner having a spectral transmissivity such as to substantially absorb a visible light but substantially transmit a light having a wavelength of 750 nm or more.
Claim 2
Dependent Claim
124 words
An image forming method comprising: uniformly exposing an image retainer having a photoconductive layer, with a light containing a wavelength component of 750 nm or more; forming a latent image by subjecting the image retainer to charging and image exposure; forming a toner image by developing said latent image with a toner; repeating at least once each of the steps of forming said latent image and forming said toner image; and transferring a plurality of toner images formed on said image retainer to a transfer material; wherein at least one of said toner images is formed with a toner having a spectral transmissivity such as to substantially absorb a visible light but substantially transmit a light having a wavelength of 750 nm or more.
Claim 3
Dependent Claim
131 words
An image forming method comprising: forming a latent image by subjecting an image retainer having a photoconductive layer to charging and image exposure; forming a toner image by developing said latent image with a toner; repeating at least once each of the steps of forming said latent image and forming said toner image; uniformly exposing said image retainer on which toner exists, through said toner with a light containing a wavelength component of 750 nm or more; and transferring a plurality of toner images formed on said image retainer to a transfer material; wherein at least one of said toner images is formed with a toner having a spectral transmissivity such as to substantially absorb a visible light but substantially transmit a light having a wavelength of 750 nm or more.
Claim 4
Dependent Claim
131 words
An image forming method comprising: forming a latent image by subjecting an image retainer having a photoconductive layer to charging and image exposure; forming a toner image by developing said latent image with a toner; repeating at least once each of the steps of forming said latent image and forming said toner image; uniformly exposing said image retainer on which toner exists, through said toner with a light containing a wavelength component of 750 nm or more; and transferring a plurality of toner images formed on said image retainer to a transfer material; wherein at least one of said toner images is formed with a toner having a spectral transmissivity such as to substantially absorb a visible light but substantially transmit a light having a wavelength of 750 nm or more.
Claim 5
Dependent Claim
24 words
An image forming method according to claim 1, wherein the light for the image exposure contains a wavelength component of 750 nm or more.
Claim 6
Dependent Claim
28 words
An image forming method according to claim 1, wherein the developments at the step of forming said toner image and said repeating step are of the reversal type.
Claim 7
Dependent Claim
28 words
An image forming method according to claim 2, wherein the developments at the step of forming said toner image and said repeating step are of the reversal type.
Claim 8
Dependent Claim
40 words
An image forming method according to claim 1, wherein said toner having such a spectral transmissivity as to substantially absorb a visible light but substantially transmit a light having a wavelength of 750 nm or more is the black toner.
Claim 9
Dependent Claim
34 words
An image forming method according to claim 1, wherein the plurality of toner images are formed with such a toner as to substantially transmit a light having a wavelength of 750 nm or more.
Claim 10
Dependent Claim
27 words
The method of claim 2 wherein said image retainer is uniformly exposed to said light containing wavelength component prior to the formation of said first latent image.
Claim 11
Dependent Claim
36 words
The method of claim 2 wherein said toner having a spectral transmissivity as to substantially absorb a visible light but substantially transmit a light having a wavelength of 750 nm or more is a black toner.
Claim 12
Dependent Claim
31 words
The method of claim 2 wherein said plurality of toner images are formed with toner through which a light having a wavelength of 750 nm or more can be substantially transmitted.
Claim 13
Dependent Claim
19 words
The method of claim 2 wherein light for image exposure contains a wavelength component of 750 nm or more.
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USPTO Annuity & Maintenance Windows
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| 3.5 Years (Year 4) | 1993-01-29 | 1993-07-31 | 1994-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-29 | 1997-07-31 | 1998-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-29 | 2001-07-31 | 2002-01-30 | $7700.00 | Window Closed / Lapsed |