US3853555A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of color imaging a layer of electrically photosensitive agglomerates
Assignee: Xerox Corp
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Filing: 1972-11-28
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Granted: 1974-12-10
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Expires: 1992-11-28
Abstract
Abstract A method for obtaining color separation wherein an electrically photosensitive imaging layer comprises a randomly mixed monolayer of a plurality of at least two different electrically photosensitive agglomerates. The imaging layer is placed between two members and subjected to a first electric field. Such field is then modified as by reducing, grounding or reversing the field. After such modification, the first field is substantially restored across the imaging layer prior to imagewise exposure of the imaging layer to electromagnetic radiation to which it is sensitive. The imaging layer is then exposed to appropriate electromagnetic radiation and the members separated. Upon separation of the members exposed, agglomerates of the mono-layer of plurality of agglomerates are independently removed from the mono-layer in imagewise configuration thereby forming a multicolor copy of the original image on one of the sheets.
Inventors
- 👤 G Reinis
- 👤 K Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:45
CPC Classifications
G; G03; G03G; G03G17/00; G03G17/08
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
223 words
A METHOD OF IMAGING COMPRISING: A. PROVIDING AN IMAGING MONO-LAYER SANDWICHED BETWEEN A DONOR AND A RECEIVER MEMBER, AT LEAST ONE OF SAID DONOR AND RECEIVER MEMBERS BEING AT LEAST PARTIALLY TRANSPARENT TO ELECTROMAGNETIC RADIATION TO WHICH SAID IMAGING LAYER IS SENSITIVE, SAID MONO-LAYER COMPRISING A PLURALITY OF RADOMLY MIXED ELECTRICALLY COLORS WITH CORRESPONDINGLY DIFOF AT LEAST TOW DIFFERENT COLORS WITH CORRESPONDINGLY DIFFERENT SPECTRAL SENSITIVITIES TO ELECTROMAGNETIC RADIATION, EACH INDIVIDUAL AGGLOMERATE OF SAID PLURALITY BEING REMOVABLE FROM SAID MONO-LAYER INDEPENDENTLY OF THE OTHER MONOLAYER AGGLOMERATES; B. MAINTAINING FIRST ELECTRICAL FIELD ACROSS SAID IMAGING LAYER; C. MODIFYING SAID FIRST ELECTRICAL FIELD WHEREIN SAID MODIFICATION INVOLVES REDUCING, GROUNDING OR REVERSING THE POTENTIAL ACROSS SAID IMAGING LAYER; D. SUBSTANTIALLY RESTORING SAID FIRST ELECTRICAL FIELD TO A CONSTANT POTENTIAL; E. EXPOSING SAID MONO-LAYER TO A PATTERN OF ELECTROMAGNETIC RADIATION TO WHICH AT LEAST ONE OF SAID AGGLOMERATES ARE SENSITIVE WHILE APPLYING SAID RESTORED ELECTRIC FIELD ACROSS SAID IMAGING MONO-LAYER, SAID ELECTRIC FIELD BEING HELD AT A SUBSTANTIALLY CONSTANT POTENTIAL DURING SAID EXPOSURE; AND F. DURING THE APPLICATION OF SAID RSTORES FIELD, SEPARATING SAID RECEIVER MEMBER FROM SAID DONOR MEMBER WHEREBY EXPOSED INDIVIDUAL AGGLOMERATES ARE REMOVED FROM SAID MONO-LAYER IN IMAGEWISE CONFIGURATION BY SELECTIVE ADHESION TO AT LEAST ONE OF SAID DONOR AND RECEIVER MEMBERS WHILE THE NON-EXPOSED INDIVIDUAL AGGLOMERATES ADHERE TO THE OTHER FORMING A COLORED IMAGE.
Claim 2
Independent Claim
223 words
A METHOD OF IMAGING COMPRISING: A. PROVIDING AN IMAGING MONO-LAYER SANDWICHED BETWEEN A DONOR AND A RECEIVER MEMBER, AT LEAST ONE OF SAID DONOR AND RECEIVER MEMBERS BEING AT LEAST PARTIALLY TRANSPARENT TO ELECTROMAGNETIC RADIATION TO WHICH SAID IMAGING LAYER IS SENSITIVE, SAID MONO-LAYER COMPRISING A PLURALITY OF RADOMLY MIXED ELECTRICALLY COLORS WITH CORRESPONDINGLY DIFOF AT LEAST TOW DIFFERENT COLORS WITH CORRESPONDINGLY DIFFERENT SPECTRAL SENSITIVITIES TO ELECTROMAGNETIC RADIATION, EACH INDIVIDUAL AGGLOMERATE OF SAID PLURALITY BEING REMOVABLE FROM SAID MONO-LAYER INDEPENDENTLY OF THE OTHER MONOLAYER AGGLOMERATES; B. MAINTAINING FIRST ELECTRICAL FIELD ACROSS SAID IMAGING LAYER; C. MODIFYING SAID FIRST ELECTRICAL FIELD WHEREIN SAID MODIFICATION INVOLVES REDUCING, GROUNDING OR REVERSING THE POTENTIAL ACROSS SAID IMAGING LAYER; D. SUBSTANTIALLY RESTORING SAID FIRST ELECTRICAL FIELD TO A CONSTANT POTENTIAL; E. EXPOSING SAID MONO-LAYER TO A PATTERN OF ELECTROMAGNETIC RADIATION TO WHICH AT LEAST ONE OF SAID AGGLOMERATES ARE SENSITIVE WHILE APPLYING SAID RESTORED ELECTRIC FIELD ACROSS SAID IMAGING MONO-LAYER, SAID ELECTRIC FIELD BEING HELD AT A SUBSTANTIALLY CONSTANT POTENTIAL DURING SAID EXPOSURE; AND F. DURING THE APPLICATION OF SAID RSTORES FIELD, SEPARATING SAID RECEIVER MEMBER FROM SAID DONOR MEMBER WHEREBY EXPOSED INDIVIDUAL AGGLOMERATES ARE REMOVED FROM SAID MONO-LAYER IN IMAGEWISE CONFIGURATION BY SELECTIVE ADHESION TO AT LEAST ONE OF SAID DONOR AND RECEIVER MEMBERS WHILE THE NON-EXPOSED INDIVIDUAL AGGLOMERATES ADHERE TO THE OTHER FORMING A COLORED IMAGE.
Claim 3
Dependent Claim
11 words
The method of claim 1 wherein said agglomerates are particle agglomerates.
Claim 4
Dependent Claim
11 words
The method of claim 1 wherein said agglomerates are particle-binder agglomerates.
Claim 5
Dependent Claim
19 words
The method of claim 1 wherein said agGlomerates have diameters ranging from about 0.1 micron to about 25 microns.
Claim 6
Dependent Claim
16 words
The method of claim 4 wherein said diameters are from about 3 to about 15 microns.
Claim 7
Dependent Claim
15 words
The method of claim 5 wherein said diameters are from about 5 to 10 microns.
Claim 8
Dependent Claim
15 words
The method of claim 1 wherein at least one of said members is electrically insulating.
Claim 9
Dependent Claim
26 words
The method of claim 7 wherein said electric field is caused by the induction of a static electrical charge into at least one of said members.
Claim 10
Dependent Claim
27 words
The method of claim 1 wherein said first electrical field is in the range of from about 2,000 volts per mil to about 7,000 volts per mil.
Claim 11
Dependent Claim
19 words
The method of claim 1 wherein said electric field is modified by reversing the potential across said imaging layer.
Claim 12
Dependent Claim
17 words
The method of claim 1 wherein the electrical field is modified by grounding said first electrical field.
Claim 13
Dependent Claim
16 words
The method of claim 1 wherein said field is modified by reducing said first electrical field.
Claim 14
Dependent Claim
14 words
The method of claim 1 wherein said electrically photosensitive material is an organic material.
Claim 15
Dependent Claim
12 words
The method of claim 13 wherein said organic material comprises metal-free phthalocyanine.
Claim 16
Dependent Claim
17 words
The method of claim 13 wherein said organic electrically photosensitive material is dispersed in an insulating binder.
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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) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |