US4599285A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiplex image reproducing method
Assignee: Konica Minolta Inc
•
Filing: 1984-10-01
•
Granted: 1986-07-08
•
Expires: 2004-10-01
Abstract
Abstract A method of reproducing multiplex images wherein an electrostatic image is formed on an image retainer by using a common electrostatic image forming device, the electrostatic image formed on the image retainer is developed, the steps of the above are repeated to superpose a plurality of toner images on the image retainer, and the toner images is transferred on a recording paper by one step. The developings other than the first time developing are carried out in such a manner that the surface of a developer layer on a developer feeding carrier does not contact with the surface of the toner image on the image retainer.
Inventors
- 👤 Satoshi Haneda
- 👤 Hisashi Shoji
- 👤 Seiichiro Hiratsuka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:26
CPC Classifications
G; G03; G03G; G03G13/00; G03G13/01; G03G13/013; G03G13/0133
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
109 words
A method of reproducing multiplex images comprising the steps of forming an electrostatic image on an image retainer having thereon an electrostatic image retaining layer by using an electrostatic image forming means, developing the electrostatic image formed on the image retainer to form a toner image, said developing being carried out under such conditions that an oscillating electric field is applied between the image retainer and a developer feeding carrier to form a dielectric layer for retaining said electrostatic images, repeating the steps of the above to superpose a plurality of toner images on the image retainer, and transferring the toner images onto a recording paper in one step.
Claim 2
Independent Claim
109 words
A method of reproducing multiplex images comprising the steps of forming an electrostatic image on an image retainer having thereon an electrostatic image retaining layer by using an electrostatic image forming means, developing the electrostatic image formed on the image retainer to form a toner image, said developing being carried out under such conditions that an oscillating electric field is applied between the image retainer and a developer feeding carrier to form a dielectric layer for retaining said electrostatic images, repeating the steps of the above to superpose a plurality of toner images on the image retainer, and transferring the toner images onto a recording paper in one step.
Claim 3
Dependent Claim
52 words
The method of reproducing multiplex images according to claim 1, wherein the developings other than the first time developing are carried out in such a manner that the surface of a developer layer on a developer feeding carrier does not contact with the surface of the toner image on the image retainer.
Claim 4
Dependent Claim
51 words
The method of reproducing multiplex images according to claim 2, wherein the image exposure is a spot distribution exposure so that at least one portion of a spot of the preceding image exposure and at least one portion of a spot of the following image exposure are superposed with each other.
Claim 5
Dependent Claim
28 words
The method of reproducing multiplex images according to claim 3, wherein the spots of the preceding image exposure and the following image exposure can be varied in size.
Claim 6
Dependent Claim
112 words
In a method of reproducing multiplex images comprising the steps of forming an electrostatic image on an image retainer, developing the electrostatic image formed on the image retainer by using a developer consisting of a plurality of components, and repeating the steps of the above to superpose a plurality of toner images on the image retainer, the improvement characterized in that each developing step is carried out under a condition mentioned below: 0.2≦V.sub.AC /(d·f) {(V.sub.AC /d)-1500}/f≦1.0 where V AC is an amplitude (V) of AC component of developing bias, f is a frequency (Hz), and d is a gap (mm) between the image retainer and a developer feeding carrier for feeding developer.
Claim 7
Dependent Claim
112 words
In a method of reproducing multiplex images comprising the steps of forming an electrostatic image on an image retainer, developing the electrostatic image formed on the image retainer by using a developer consisting of a plurality of components, and repeating the steps of the above to superpose a plurality of toner images on the image retainer, the improvement characterized in that each developing step is carried out under a condition mentioned below: 0.2≦V.sub.AC /(d·f) {(V.sub.AC /d)-1500}/f≦1.0 where V AC is an amplitude (V) of AC component of developing bias, f is a frequency (Hz), and d is a gap (mm) between the image retainer and a developer feeding carrier for feeding developer.
Claim 8
Dependent Claim
42 words
The method of reproducing multiplex images according to claim 5, wherein the gap between the image retainer and the developer feeding carrier is kept larger than the thickness of a developer layer formed on the developer feeding carrier in each developing step.
Claim 9
Dependent Claim
33 words
The method of reproducing multiplex images according to claim 5, wherein the multiplex images are formed by using developers in order from the developer having a smaller obsolute value of mean charge quantity.
Claim 10
Dependent Claim
41 words
The method of reproducing multiplex images according to claim 5, wherein the multiplex images are formed by reducing successively the amplitude of AC component of electric field applied between the image retainer and the developer feeding carrier in each developing step.
Claim 11
Dependent Claim
41 words
The method of reproducing multiplex images according to claim 5, wherein the multiplex images are formed by increasing successively the frequency of AC component of electric field applied between the image retainer and the developer feeding carrier in each developing step.
Claim 12
Dependent Claim
105 words
In a method of reproducing multiplex images comprising the steps of forming an electrostatic image on an image retainer, developing the electrostatic image formed on the image retainer by using a one-component developer, and repeating the steps of the above to superpose a plurality of toner images on the image retainer, the improvement characterized in that each developing step is carried out under a condition mentioned below: 0.2≦V.sub.AC /(d·f)≦1.6 where V AC is an amplitude (V) of AC component of developing bias, f is a frequency (Hz), and d is a gap (mm) between the image retainer and a developer feeding carrier for feeding developer.
Claim 13
Dependent Claim
105 words
In a method of reproducing multiplex images comprising the steps of forming an electrostatic image on an image retainer, developing the electrostatic image formed on the image retainer by using a one-component developer, and repeating the steps of the above to superpose a plurality of toner images on the image retainer, the improvement characterized in that each developing step is carried out under a condition mentioned below: 0.2≦V.sub.AC /(d·f)≦1.6 where V AC is an amplitude (V) of AC component of developing bias, f is a frequency (Hz), and d is a gap (mm) between the image retainer and a developer feeding carrier for feeding developer.
Claim 14
Dependent Claim
42 words
The method of reproducing multiplex images according to claim 10, wherein the gap between the image retainer and the developer feeding carrier is kept larger than the thickness of a developer layer formed on the developer feeding carrier in each developing step.
Claim 15
Dependent Claim
33 words
The method of reproducing multiplex images according to claim 10, wherein the multiplex images are formed by using developers in order from the developer having a smaller obsolute value of mean charge quantity.
Claim 16
Dependent Claim
41 words
The method of reproducing multiplex images according to claim 10, wherein the multiplex images are formed by reducing successively the amplitude of AC component of electric field applied between the image retainer and the developer feeding carrier in each developing step.
Claim 17
Dependent Claim
41 words
The method of reproducing multiplex images according to claim 10, wherein the multiplex images are formed by increasing successively the frequency of AC component of electric field applied between the image retainer and the developer feeding carrier in each developing step.
Claim 18
Dependent Claim
25 words
The method of reproducing multiplex images according to claim 2, wherein the electrostatic image retaining member of the image retainer consists of a photosensitive member.
Claim 19
Dependent Claim
25 words
The method of reproducing multiplex images according to claim 2, wherein the electrostatic image retaining member of the image retainer consists of a dielectric member.
Claim 20
Independent Claim
117 words
A method of reproducing multiplex images comprising the steps of forming an electrostatic image on an image retainer having thereon an electrostatic image retaining layer by using a common electrostatic image forming means, developing the electrostatic image formed on the image retainer to form a toner image, repeating the steps of the above to superpose a plurality of toner images on the image retainer, and transferring the toner images on a recording paper by one step, the developing other than the first time developing being carried out in such a manner that the surface of a developer layer on a developer feeding carrier does not contact with the surface of the toner image on the image retainer.
Claim 21
Independent Claim
117 words
A method of reproducing multiplex images comprising the steps of forming an electrostatic image on an image retainer having thereon an electrostatic image retaining layer by using a common electrostatic image forming means, developing the electrostatic image formed on the image retainer to form a toner image, repeating the steps of the above to superpose a plurality of toner images on the image retainer, and transferring the toner images on a recording paper by one step, the developing other than the first time developing being carried out in such a manner that the surface of a developer layer on a developer feeding carrier does not contact with the surface of the toner image on the image retainer.
Claim 22
Dependent Claim
207 words
In a method of reproducing multiplex images comprising the steps of forming an electrostatic image on an image retainer, developing the electrostatic image formed on the image retainer by using a developer consisting of a plurality of components, and repeating the steps of the above to superpose a plurality of toner images on the image retainer, the improvement characterized in that each developing step is carried out under a condition mentioned below: 0.2≦V.sub.AC /(d·f) {(V.sub.AC /d)-1500}/f≦1.0 where V AC is an amplitude (V) of AC component of developing bias, f is a frequency (Hz), and d is a gap (mm) between the image retainer and a developer feeding carrier for feeding developer; that the gap between the image retainer and the developer feeding carrier is kept larger than the thickness of a developer layer formed on the developer feeding carrier in each developing step; that the multiplex images are fromed by reducing successively the amplitude of AC component of electric field applied between the image retainer and the developer feeding carrier in each developing step, and that the multiplex images are fromed by increasing successively the frequency of AC component of electric field applied between the image retainer and the developer feeding carrier in each developing step.
Claim 23
Dependent Claim
207 words
In a method of reproducing multiplex images comprising the steps of forming an electrostatic image on an image retainer, developing the electrostatic image formed on the image retainer by using a developer consisting of a plurality of components, and repeating the steps of the above to superpose a plurality of toner images on the image retainer, the improvement characterized in that each developing step is carried out under a condition mentioned below: 0.2≦V.sub.AC /(d·f) {(V.sub.AC /d)-1500}/f≦1.0 where V AC is an amplitude (V) of AC component of developing bias, f is a frequency (Hz), and d is a gap (mm) between the image retainer and a developer feeding carrier for feeding developer; that the gap between the image retainer and the developer feeding carrier is kept larger than the thickness of a developer layer formed on the developer feeding carrier in each developing step; that the multiplex images are fromed by reducing successively the amplitude of AC component of electric field applied between the image retainer and the developer feeding carrier in each developing step, and that the multiplex images are fromed by increasing successively the frequency of AC component of electric field applied between the image retainer and the developer feeding carrier in each developing step.
Claim 24
Dependent Claim
200 words
In a method of reproducing multiplex images comprising the steps of forming an electrostatic image on an image retainer, developing the electrostatic image formed on the image retainer by using a one-component developer, and repeating the steps of the above to superpose a plurality of toner images on the image retainer, the improvement characterized in that each developing step is carried out under a condition mentioned below: 0.2≦V.sub.AC /(d·f)≦1.6 where V AC is an amplitude (V) of AC component of developing bias, f is a frequency (Hz), and d is a gap (mm) between the image retainer and a developer feeding carrier for feeding developer; that the gap between the image retainer and the developer feeding carrier is kept larger than the thickness of a developer layer formed on the developer feeding carrier in each developing step; that the multiplex images are formed by reducing successively the amplitude of AC component of electric field applied between the image retainer and the developer feeding carrier in each developing step; and that the multiplex images are formed by increasing successively the frequency of AC component of electric field applied between the image retainer and the developer feeding carrier in each developing step.
Claim 25
Dependent Claim
200 words
In a method of reproducing multiplex images comprising the steps of forming an electrostatic image on an image retainer, developing the electrostatic image formed on the image retainer by using a one-component developer, and repeating the steps of the above to superpose a plurality of toner images on the image retainer, the improvement characterized in that each developing step is carried out under a condition mentioned below: 0.2≦V.sub.AC /(d·f)≦1.6 where V AC is an amplitude (V) of AC component of developing bias, f is a frequency (Hz), and d is a gap (mm) between the image retainer and a developer feeding carrier for feeding developer; that the gap between the image retainer and the developer feeding carrier is kept larger than the thickness of a developer layer formed on the developer feeding carrier in each developing step; that the multiplex images are formed by reducing successively the amplitude of AC component of electric field applied between the image retainer and the developer feeding carrier in each developing step; and that the multiplex images are formed by increasing successively the frequency of AC component of electric field applied between the image retainer and the developer feeding carrier in each developing step.
Claim 26
Independent Claim
79 words
A method of reproducing multiplex images comprising the steps of forming an electrostatic image on an image retainer having thereon an electrostatic image retaining layer by using an electrostatic image forming means, developing the electrostatic image formed on the image retainer to form a toner image, eliminating residual electric charges, repeating the steps of the above to superpose a plurality of toner images on the image retainer, and transferring the toner images on a recording paper by one step.
Claim 27
Independent Claim
79 words
A method of reproducing multiplex images comprising the steps of forming an electrostatic image on an image retainer having thereon an electrostatic image retaining layer by using an electrostatic image forming means, developing the electrostatic image formed on the image retainer to form a toner image, eliminating residual electric charges, repeating the steps of the above to superpose a plurality of toner images on the image retainer, and transferring the toner images on a recording paper by one step.
Claim 28
Dependent Claim
23 words
The method of reproducing multiplex images according to claim 2, wherein a two-component developer having a toner and an insulating carrier is used.
Claim 29
Dependent Claim
21 words
The method of reproducing multiplex images according to claim 2, wherein a one-component developer consisting of an insulating toner is used.
Claim 30
Dependent Claim
80 words
The method of reproducing multiplex images according to claim 2, wherein the image retainer consists of a photosensitive image retainer formed by laminating a photoconductive photosensitive layer and a transparent insulating layer on an electroconductive supporting member, in that order, and the electrostatic image for forming a toner image is formed by primary charging, secondary charging, image exposure simultaneous with the secondary charging and sequential uniform exposure, said primary charging dropping a potential of the electrostatic images substantially to zero.
Claim 31
Dependent Claim
108 words
The method of reproducing multiplex images according to claim 2, wherein the image retainer consists of a photosensitive image retainer formed by laminating a photoconductive photosensitive layer and a transparent insulating layer on an electroconductive supporting member, in that order, the electrostatic image for forming a first toner image is formed by primary charging, secondary charging and sequential image exposure, said primary charging dropping a potential of the electrostatic images substantially to zero, and then the electrostatic image for forming a second toner image is formed by primary charging, secondary charging, and sequential image exposure, said primary charging dropping a potential of the electrostatic images substantially to zero.
Claim 32
Dependent Claim
122 words
The method of reproducing multiplex images according to claim 2 wherein the image retainer consists of a photosensitive image retainer formed by laminating a photoconductive photosensitive layer and a transparent insulating layer on an electroconductive supporting member, in that order, the electrostatic image for forming a first toner image is formed by primary charging, secondary charging, image exposure simultaneous with the secondary charging and sequential uniform exposure, said primary charging dropping a potential of the electrostatic images substantially to zero, and then the electrostatic image for forming a second toner image is formed by primary charging, secondary charging, image exposure simultaneous with the secondary charging and sequential uniform exposure, said primary charging dropping a potential of the electrostatic images substantially to zero.
Claim 33
Dependent Claim
92 words
The method of reproducing multiplex images according to claim 2, wherein the image retainer consists of a photosensitive image retainer formed by laminating a photoconductive photosensitive layer and a transparent insulating layer, in that order, on an electroconductive supporting member, and the electrostatic image for forming a toner image is formed by uniform primary charging on said photosensitive image retainer in the first developing, uniform secondary charging in a polarity reverse to said primary charging and sequential image exposure, said primary charging dropping a potential of the electrostatic images substantially to 0.
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) | 1989-07-07 | 1990-01-06 | 1990-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-07 | 1994-01-06 | 1994-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-07 | 1998-01-06 | 1998-07-08 | $7700.00 | Window Closed / Lapsed |