US4656966A
Expired / Lapsed
US
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Method and apparatus for developing electrographic images uses molecular sieve zeolite
Assignee: Eastman Kodak Co
•
Filing: 1986-08-04
•
Granted: 1987-04-14
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Expires: 2006-08-04
Abstract
Abstract A method and apparatus for developing an electrostatic latent image on an electrographic element with a liquid developer by contacting the liquid developer with a molecular sieve zeolite.
Inventors
- 👤 Robert A. Guistina
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:47
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/10; G03G15/104
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
33 words
In a method of developing an electrostatic charge pattern on the surface of an electrographic element with a liquid developer, the improvement which comprises contacting the liquid developer with a molecular sieve zeolite.
Claim 2
Dependent Claim
33 words
In a method of developing an electrostatic charge pattern on the surface of an electrographic element with a liquid developer, the improvement which comprises contacting the liquid developer with a molecular sieve zeolite.
Claim 3
Dependent Claim
19 words
The method of claim 1 wherein the liquid developer is passed through a zone containing molecular sieve zeolite particles.
Claim 4
Dependent Claim
16 words
The method of claim 2 wherein the molecular sieve zeolite particles are restrained within the zone.
Claim 5
Dependent Claim
20 words
The method of claim 1 wherein the liquid developer is continuously passed through the zone containing molecular sieve zeolite particles.
Claim 6
Dependent Claim
20 words
The method of claim 1 wherein the liquid developer is intermittently passed through the zone containing molecular sieve zeolite particles.
Claim 7
Dependent Claim
25 words
The method of claim 1 wherein the molecular sieve zeolite is selected from the group consisting of Type A and Type X molecular sieve zeolites.
Claim 8
Dependent Claim
17 words
The method of claim 6 wherein the molecular sieve zeolite is a Type A molecular sieve zeolite.
Claim 9
Dependent Claim
17 words
The method of claim 6 wherein the molecular sieve zeolite is a Type X molecular sieve zeolite.
Claim 10
Dependent Claim
14 words
The method of claim 1 wherein the liquid developer comprises an insulating carrier liquid.
Claim 11
Dependent Claim
23 words
The method of claim 1 wherein the liquid developer includes an insulating carrier liquid, a binder, a colorant and a charge control agent.
Claim 12
Dependent Claim
28 words
The method of claim 1 wherein the liquid developer available for use in developing the electrostatic charge pattern is recirculated through a zone of molecular sieve zeolite particles.
Claim 13
Dependent Claim
18 words
The method of claim 1 wherein the molecular sieve zeolite particles are bonded agglomerates of 1000 to 5000μ.
Claim 14
Independent Claim
65 words
An apparatus for developing an electrostatic latent image on an electrographic element which comprises a sump for housing a quantity of liquid developer, an applicator head for applying the liquid developer to the surface of the electrographic element, a means for delivering the liquid developer from the sump to the applicator head and a means for contacting the liquid developer with a molecular sieve zeolite.
Claim 15
Independent Claim
65 words
An apparatus for developing an electrostatic latent image on an electrographic element which comprises a sump for housing a quantity of liquid developer, an applicator head for applying the liquid developer to the surface of the electrographic element, a means for delivering the liquid developer from the sump to the applicator head and a means for contacting the liquid developer with a molecular sieve zeolite.
Claim 16
Dependent Claim
33 words
The apparatus of claim 13 wherein the means for passing the liquid developer over a molecular sieve zeolite includes a pervious bag containing molecular sieve zeolite particles, said bag disposed within the sump.
Claim 17
Dependent Claim
35 words
The apparatus of claim 13 wherein the means for passing the liquid developer over a molecular sieve zeolite includes a liquid developer recirculation means at least a portion of which contains molecular sieve zeolite particles.
Claim 18
Dependent Claim
29 words
The apparatus of claim 13 wherein the means for contacting the liquid developer with a molecular sieve zeolite is located above the lowest level of the liquid development system.
Claim 19
Dependent Claim
27 words
The apparatus of claim 13 wherein the means for contacting the liquid developer with a molecular sieve zeolite is located substantially near the top of the sump.
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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) | 1990-04-13 | 1990-10-13 | 1991-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-13 | 1994-10-13 | 1995-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-13 | 1998-10-13 | 1999-04-14 | $7700.00 | Window Closed / Lapsed |