US5515155A
Expired / Lapsed
US
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Method and apparatus for establishing exposure and developer set points for color image formation
Assignee: Xerox Corp
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Filing: 1995-06-07
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Granted: 1996-05-07
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Expires: 2015-06-07
Abstract
Abstract An apparatus for creating multiple color images is disclosed. The apparatus includes a charge retentive surface having a voltage saturation level, a plurality of imaging devices, and a plurality of developing devices. A first imaging device records a latent image on the charge retentive surface at a first exposure level. The latent image is then developed with a layer of toner particles by a first developing device. A second imaging device records a second latent image at a second exposure level. The second exposure level is a function of the voltage saturation level for the charge retentive surface and the maximum mass of the first layer of toner particles. A second developing device develops the second latent image with a second layer of toner particles and a third imaging device records a third latent image at a third exposure level. The third exposure level is a function of the voltage saturation level for the charge retentive surface, the maximum mass of the first layer of the toner particles, and the maximum mass of the second layer of the toner particles. A third developing device develops the third latent image with a third layer of toner particles.
Inventors
- 👤 Jeffrey J. Folkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:02
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/01; G03G15/0142; G03G15/0147; G03G15/0152; G03G15/0105; G03G15/011; G03G15/0163; G03G2215/00; G03G2215/01; G03G2215/0167; G03G2215/017
Claims Analysis
Total Claims: 39
Claim 1
Independent Claim
91 words
An apparatus for creating multiple color images, including: a charge retentive surface having a voltage saturation level; an imaging device which records a first latent image on said charge retentive surface; and a first developing device which develops the first latent image with a first layer of non-black toner particles, said imaging device recording a second latent image at a second exposure level with the second exposure level being a function of the voltage saturation level for said charge retentive surface and the first layer of non-black toner particles maximum mass.
Claim 2
Independent Claim
91 words
An apparatus for creating multiple color images, including: a charge retentive surface having a voltage saturation level; an imaging device which records a first latent image on said charge retentive surface; and a first developing device which develops the first latent image with a first layer of non-black toner particles, said imaging device recording a second latent image at a second exposure level with the second exposure level being a function of the voltage saturation level for said charge retentive surface and the first layer of non-black toner particles maximum mass.
Claim 3
Dependent Claim
32 words
An apparatus according to claim 1, wherein said imaging device includes: a first imaging device to record the first latent image; and a second imaging device to record the second latent image.
Claim 4
Dependent Claim
78 words
An apparatus according to claim 1, further including a second developing device which develops the second latent image with a second layer of non-black toner particles, said imaging device records a third latent image at a third exposure level with the third exposure level being a function of the voltage saturation level for said charge retentive surface, the first layer of the non-black toner particles maximum mass and the second layer of the non-black toner particles maximum mass.
Claim 5
Dependent Claim
26 words
An apparatus according to claim 3, further including a third developing device which develops the third latent image with a third payer of non-black toner particles.
Claim 6
Dependent Claim
47 words
An apparatus according to claim 1, wherein the voltage saturation level for said charge retentive surface is defined as an exposure level at which a voltage on said charge retentive surface is discharged by light exposure to 95 percent of the level for said charge retentive surface.
Claim 7
Dependent Claim
50 words
An apparatus according to claim 1, wherein the function for setting the second exposure value is defined as an exposure level greater than or equal to the voltage saturation level for said charge retentive surface divided by a fraction of light transmitted through the first nonblack toner layer maximum mass.
Claim 8
Dependent Claim
57 words
An apparatus according to claim 6, wherein the function for setting the third exposure value is defined as an exposure level greater than or equal to the saturation level for said charge retentive surface divided by a fraction of light transmitted through the first non-black toner layer maximum mass and the second non-black toner layer maximum mass.
Claim 9
Independent Claim
101 words
An apparatus for creating multiple color images including a charge retentive surface having an exposure response relationship according to: Exp.sub.pr (10%)/Exp.sub.pr (50%)>2.2 where: Exp pr (10%) represents a first exposure value to which said charge retentive surface is discharged to a percentage difference between the dark decay voltage of said charge retentive surface and the saturation voltage for said charge retentive surface; Exp pr (50%) represents a second exposure value to which said charge retentive surface is discharged to a percentage difference between the dark decay voltage of said charge retentive surface and the saturation voltage for said charge retentive surface.
Claim 10
Independent Claim
101 words
An apparatus for creating multiple color images including a charge retentive surface having an exposure response relationship according to: Exp.sub.pr (10%)/Exp.sub.pr (50%)>2.2 where: Exp pr (10%) represents a first exposure value to which said charge retentive surface is discharged to a percentage difference between the dark decay voltage of said charge retentive surface and the saturation voltage for said charge retentive surface; Exp pr (50%) represents a second exposure value to which said charge retentive surface is discharged to a percentage difference between the dark decay voltage of said charge retentive surface and the saturation voltage for said charge retentive surface.
Claim 11
Dependent Claim
16 words
An apparatus according to claim 1, further comprising means for pulse width modulating said imaging device.
Claim 12
Dependent Claim
89 words
An apparatus wherein said charge retentive surface moves in a process direction according to claim 1, wherein said imaging device forms a spot in a process direction having a minimum size according to: E(X.sub.ss /2)/E(0)>0.35 where: x ss represents a spacing between scan lines; E(x ss ) represents the imaging device exposure as a function of distance from the center of the spot for a single spot in a slow scan direction; and E(0) represents the imaging device exposure at zero distance from the center of the scan lines.
Claim 13
Dependent Claim
26 words
An apparatus according to claim 10, wherein said imaging device forms a spot in a process direction having a maximum size according to E(x ss /2)/E(0)<0.5.
Claim 14
Dependent Claim
60 words
An apparatus according to claim 10, wherein said imaging device forms a spot in a direction substantially perpendicular to the process direction having a maximum size according to E(x fs /2)/E(0)<0.5 where E(x fs ) represents the imaging device exposure as a function of distance from the center of the spot for a single spot in a fast scan direction.
Claim 15
Dependent Claim
50 words
An apparatus according to claim 1, wherein: said first developing device develops the first latent image with toner particles of a first color; and said second developing device develops the second latent image with toner particles of a second color with the first color being different from the second color.
Claim 16
Dependent Claim
19 words
An apparatus according to claim 13, wherein the first toner particles absorb less light than the second toner particles.
Claim 17
Dependent Claim
92 words
A printing machine for creating multiple color images including: a charge retentive surface having a voltage saturation level; an imaging device which records a first latent image on said charge retentive surface; and a first developing device which develops the first latent image with a first layer of non-black toner particles, said imaging device recording a second latent image at a second exposure level with the second exposure level being a function of the voltage saturation level for said charge retentive surface and the first layer of non-black toner particles maximum mass.
Claim 18
Dependent Claim
92 words
A printing machine for creating multiple color images including: a charge retentive surface having a voltage saturation level; an imaging device which records a first latent image on said charge retentive surface; and a first developing device which develops the first latent image with a first layer of non-black toner particles, said imaging device recording a second latent image at a second exposure level with the second exposure level being a function of the voltage saturation level for said charge retentive surface and the first layer of non-black toner particles maximum mass.
Claim 19
Dependent Claim
33 words
A printing machine according to claim 15, wherein said imaging device includes: a first imaging device to record the first latent image; and a second imaging device to record the second latent image.
Claim 20
Dependent Claim
79 words
A printing machine according to claim 15, further including a second developing device which develops the second latent image with a second layer of non-black toner particles, said imaging device records a third latent image at a third exposure level with the third exposure level being a function of the voltage saturation level for said charge retentive surface, the first layer of the non-black toner particles maximum mass and the second layer of the non-black toner particles maximum mass.
Claim 21
Dependent Claim
27 words
A printing machine according to claim 17, further including a third developing device which develops the third latent image with a third layer of non-black toner particles.
Claim 22
Dependent Claim
48 words
A printing machine according to claim 15, wherein the voltage saturation level for said charge retentive surface is defined as an exposure level at which a voltage on said charge retentive surface is discharged by light exposure to 95 percent of the level for said charge retentive surface.
Claim 23
Dependent Claim
51 words
A printing machine according to claim 15, wherein the function for setting the second exposure value is defined as an exposure level greater than or equal to the voltage saturation level for said charge retentive surface divided by a fraction of light transmitted through the first non-black toner layer maximum mass.
Claim 24
Dependent Claim
58 words
A printing machine according to claim 20, wherein the function for setting the third exposure value is defined as an exposure level greater than or equal to the saturation level for said charge retentive surface divided by a fraction of light transmitted through the first non-black toner layer maximum mass and the second non-black toner layer maximum mass.
Claim 25
Dependent Claim
102 words
A printing machine for creating multiple color images including a charge retentive surface having an exposure response relationship according to: Exp.sub.pr (10%)/Exp.sub.pr (50%)<2.2 where: Exp pr (10%) represents a first exposure value to which said charge retentive surface is discharged to a percentage difference between the dark decay voltage of said charge retentive surface and the saturation voltage for said charge retentive surface; Exp pr (50%) represents a second exposure value to which said charge retentive surface is discharged to a percentage difference between the dark decay voltage of said charge retentive surface and the saturation voltage for said charge retentive surface.
Claim 26
Dependent Claim
102 words
A printing machine for creating multiple color images including a charge retentive surface having an exposure response relationship according to: Exp.sub.pr (10%)/Exp.sub.pr (50%)<2.2 where: Exp pr (10%) represents a first exposure value to which said charge retentive surface is discharged to a percentage difference between the dark decay voltage of said charge retentive surface and the saturation voltage for said charge retentive surface; Exp pr (50%) represents a second exposure value to which said charge retentive surface is discharged to a percentage difference between the dark decay voltage of said charge retentive surface and the saturation voltage for said charge retentive surface.
Claim 27
Dependent Claim
17 words
A printing machine according to claim 15, further comprising means for pulse width modulating said imaging device.
Claim 28
Dependent Claim
90 words
A printing machine wherein said charge retentive surface moves in a process direction according to claim 15, wherein said imaging device forms a spot in a process direction having a minimum size according to: E(X.sub.ss /2)/E(0)>0.35 where: x ss represents a spacing between scan lines; E(x ss ) represents the imaging device exposure as a function of distance from the center of the spot for a single spot in a slow scan direction; and E(0) represents the imaging device exposure at zero distance from the center of the scan lines.
Claim 29
Dependent Claim
27 words
A printing machine according to claim 24, wherein said imaging device forms a spot in a process direction having a maximum size according to E(x ss /2)/E(0)<0.5.
Claim 30
Dependent Claim
62 words
A printing machine according to claim 24, wherein said imaging device forms a spot in a direction substantially perpendicular to the process direction having a maximum size according to E(x fs /2)/E(0) 0.5 where E(x fs ) represents the imaging device exposure as a function of distance from the center of the spot for a single spot in a fast scan direction.
Claim 31
Dependent Claim
51 words
A printing machine according to claim 15, wherein: said first developing device develops the first latent image with toner particles of a first color; and said second developing device develops the second latent image with toner particles of a second color with the first color being different from the second color.
Claim 32
Dependent Claim
20 words
A printing machine according to claim 27, wherein the first toner particles absorb less light than the second toner particles.
Claim 33
Independent Claim
77 words
A method of creating multiple color images, including: recording a first latent image on a charge retentive surface having a voltage saturation level; developing the first latent image with a first layer of non-black toner particles; and recording a second latent image at a second exposure level with the second exposure level being a function of the voltage saturation level for the charge retentive surface and the maximum mass of the first layer of non-black toner particles.
Claim 34
Independent Claim
77 words
A method of creating multiple color images, including: recording a first latent image on a charge retentive surface having a voltage saturation level; developing the first latent image with a first layer of non-black toner particles; and recording a second latent image at a second exposure level with the second exposure level being a function of the voltage saturation level for the charge retentive surface and the maximum mass of the first layer of non-black toner particles.
Claim 35
Dependent Claim
71 words
A method according to claim 29, further including: developing the second latent image with a second layer of nonblack toner particles;and recording a third latent image at a third exposure level with the third exposure level being a function of the voltage saturation level for the charge retentive surface and the mass of the first layer of non-black toner particles and the mass of the second layer of non-black toner particles.
Claim 36
Dependent Claim
20 words
A method according to claim 30, further including developing the third latent image with a third layer of toner particles.
Claim 37
Independent Claim
47 words
A method of setup for a multicolor printing including: depositing a first non-black toner layer on a surface; depositing a second non-black toner layer on the first non-black toner layer; and increasing the second non-black toner layer mass to form a composite color having a saturated hue.
Claim 38
Independent Claim
47 words
A method of setup for a multicolor printing including: depositing a first non-black toner layer on a surface; depositing a second non-black toner layer on the first non-black toner layer; and increasing the second non-black toner layer mass to form a composite color having a saturated hue.
Claim 39
Dependent Claim
43 words
A method according to claim 32, further including: depositing a third non-black toner layer on the first non-black toner layer and the second non-black toner layer; and increasing the third non-black toner layer mass to form a composite color having a saturated hue.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-05-07 | 1999-11-06 | 2000-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-05-07 | 2003-11-06 | 2004-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-05-07 | 2007-11-06 | 2008-05-07 | $7700.00 | Window Closed / Lapsed |