US3880689A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic developer containing an electroless plating sensitizer, and method of using same
Assignee: Eastman Kodak Co
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Filing: 1973-07-19
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Granted: 1975-04-29
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Expires: 1993-07-19
Abstract
Abstract An improved method of developing magnetic images comprises contacting such an image with a novel developer to develop a visible image. The developer includes a magnetically attractable toner and an electroless plating sensitizer per se or with a binder therefor. The developer image is then electrolessly plated so as to provide it with high density and contrast. Printing off of the developed image can occur before the electroless plating, the copy sheet image being intensified by electroless plating.
Inventors
- 👤 John H Rolker
- 👤 Bradley A Carson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:47
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/10; H05K3/18; H05K3/181; H05K3/182; C; C23; C23C; C23C18/00; C23C18/16; C23C18/18; C23C18/20; C23C18/28; C23C18/285; C23C18/30; G; G03; G03G; G03G9/00; G03G9/08; G03G9/083
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
111 words
AN IMPROVED METHOD OF DEVELOPING MAGNETIC IMAGES, SAID METHOD COMPRISING: CONTACTING A LATENT MAGNETIC IMAGE ON A MAGNETIC RECORD SURFACE WITH AN IMAGE DEVELOPER COMPRISING A MAGNETICALLY ATTRACTABLE TONER HAVING A MAGNETIC COMPONENT AND A NONMAGNETIC COMPONENT, SAID TONER BEING SENSITIZED WITH A METALLIC ELECTROLESS PLATING SENSITIZER COMPRISING A COMPOUND OF A METAL SELECTED FROM TIN AND METALS OF GROUP IB AND VIII OF THE PERIODIC TABLE AND MIXTURES THEREOF, CAPABLE OF BEING REDUCED TO AN ACTIVE METAL CONSTITUENT WHICH IS A CATALYST FOR ELECTROLESS PLATING, SAID CONTACTING BEING EFFECTED FOR A TIME SUFFICIENT TO DEVELOP SAID IMAGE, AND ELECTROLESSLY PLATING SAID DEVELOPED IMAGE TO PROVIDE IT WITH DENSITY AND CONTRAST.
Claim 2
Dependent Claim
111 words
AN IMPROVED METHOD OF DEVELOPING MAGNETIC IMAGES, SAID METHOD COMPRISING: CONTACTING A LATENT MAGNETIC IMAGE ON A MAGNETIC RECORD SURFACE WITH AN IMAGE DEVELOPER COMPRISING A MAGNETICALLY ATTRACTABLE TONER HAVING A MAGNETIC COMPONENT AND A NONMAGNETIC COMPONENT, SAID TONER BEING SENSITIZED WITH A METALLIC ELECTROLESS PLATING SENSITIZER COMPRISING A COMPOUND OF A METAL SELECTED FROM TIN AND METALS OF GROUP IB AND VIII OF THE PERIODIC TABLE AND MIXTURES THEREOF, CAPABLE OF BEING REDUCED TO AN ACTIVE METAL CONSTITUENT WHICH IS A CATALYST FOR ELECTROLESS PLATING, SAID CONTACTING BEING EFFECTED FOR A TIME SUFFICIENT TO DEVELOP SAID IMAGE, AND ELECTROLESSLY PLATING SAID DEVELOPED IMAGE TO PROVIDE IT WITH DENSITY AND CONTRAST.
Claim 3
Dependent Claim
32 words
The improved method of claim 1 wherein said metal is selected from the group consisting of tin, copper, silver, gold, iron, nickel, cobalt, ruthenium, rhodium, palladium, osmium, iridium, platinum and mixtures thereof.
Claim 4
Dependent Claim
11 words
The improved method of claim 2 wherein said metal is palladium.
Claim 5
Dependent Claim
12 words
The improved method of claim 3 wherein said sensitizer comprises palladium chloride.
Claim 6
Dependent Claim
12 words
The improved method of claim 3 wherein said sensitizer comprises palladium acetate.
Claim 7
Dependent Claim
86 words
The improved method of claim 1 including the steps of preparing said sensitized toner, said steps comprising: applying to unsensitized particles of said toner a combination comprising a metal compound capable of being reduced to its active metal constituent so as to form catalytic bonding sites for an electroless metal plating process, binder material comprising one or more polymers and/or polymer formers and a solvent for said binder material and metal compound, to coat said particle therewith; and separating said coated toner particles from said solvent.
Claim 8
Dependent Claim
32 words
The improved method of claim 6 wherein said metal is selected from the group consisting of tin, copper, silver, gold, iron, nickel, cobalt, ruthenium, rhodium, palladium, osmium, iridium, platinum, and mixtures thereof.
Claim 9
Dependent Claim
11 words
The improved method of claim 7 wherein said metal is palladium.
Claim 10
Dependent Claim
66 words
The improved method of claim 1 including the step of preparing said sensitized toner, said step comprising combining a metal compound capable of being reduced to its active metal constituent so as to form catalytic bonding sites for an electroless metal plating process, binder material comprising one or more polymers containing a magnetically attractable material and a solvent for said binder material and reducible metal compound.
Claim 11
Dependent Claim
37 words
The improved method of claim 9 including the step of preparing said binder material containing a magnetically attractable material, said step comprising reacting a precursor compound of said magnetically attractable metal with said one or more polymers.
Claim 12
Dependent Claim
22 words
The improved method of claim 9 including the steps of drying said binder material-reducible metal compound and forming toner sized particles therefrom.
Claim 13
Dependent Claim
32 words
The improved method of claim 9 wherein said metal is selected from the group consisting of tin, copper, silver, gold, iron, nickel, cobalt, ruthenium, rhodium, palladium, osmium, iridium, platinum, and mixtures thereof.
Claim 14
Dependent Claim
11 words
The improved method of claim 12 wherein said metal is palladium.
Claim 15
Independent Claim
133 words
A method of producing a fixed magnetic image, comprising the steps of: contacting a latent magnetic image on a magnetic record surface with an image developer comprising a magnetically attractable toner having a magnetic component and a nonmagnetic component, said toner being sensitized with a metallic electroless plating sensitizer comprising a compound of a metal selected from tin and metals of Group IB and VIII of the periodic table and mixtures thereof, capable of being reduced to an active metal constituent which is a catalyst for electroless plating, said contacting being effected for a time sufficient to develop said image, electrolessly plating said developed image to provide it with density and contrast, and printing off the developed image from the record surface onto a receiving surface prior to said step of electrolessly plating.
Claim 16
Independent Claim
133 words
A method of producing a fixed magnetic image, comprising the steps of: contacting a latent magnetic image on a magnetic record surface with an image developer comprising a magnetically attractable toner having a magnetic component and a nonmagnetic component, said toner being sensitized with a metallic electroless plating sensitizer comprising a compound of a metal selected from tin and metals of Group IB and VIII of the periodic table and mixtures thereof, capable of being reduced to an active metal constituent which is a catalyst for electroless plating, said contacting being effected for a time sufficient to develop said image, electrolessly plating said developed image to provide it with density and contrast, and printing off the developed image from the record surface onto a receiving surface prior to said step of electrolessly plating.
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) | 1978-04-28 | 1978-10-28 | 1979-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-28 | 1982-10-28 | 1983-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-28 | 1986-10-28 | 1987-04-29 | $7700.00 | Window Closed / Lapsed |