# US 5,345,254 A · Ink jet printing process

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- Number: US 5,345,254 A
- Document ID: US5345254A
- Status: Granted
- Kind: A
- Application number: 07/700,969
- Filed: 1991-05-16
- Granted: 1994-09-06
- Earliest claimed: 1991-05-16
- Assignees: Xerox Corporation
- Inventors: Raymond W. Wong; Marcel P. Breton; Melvin D. Croucher; James M. Duff; T. Edward Petroff; William Riske; Kerstin M. Henseleit
- Web page: https://patentgrep.com/patent/US5345254A

## CPC

- C09D 11/30: Inkjet printing inks
- C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D)

## Abstract

An ink jet printing process includes jetting an ink composition onto a substrate. The ink composition is an emulsion or suspension of an organic phase in a water phase, the organic phase including at least one of oil and wax.

## Claims

### Claim 1

An ink jet printing process for an ink jet printing system which supplies an informational signal pulse, comprising the steps of providing an ink composition comprising a suspension of wax particles having a melting temperature less than about 150.degree. C., and having an average particle diameter of about 0.01 micrometer to about 2 micrometers in a water phase and a colorant, said water phase present in an amount 50 to 99% by weight and jetting said ink composition onto a substrate in response to said informational signal pulse.

### Claim 2 (depends on 1)

The process of claim 1, wherein said wax particles include a plasticizer.

### Claim 3 (depends on 1)

The process of claim 1, wherein said water phase comprises a dye based ink vehicle.

### Claim 4 (depends on 1)

The process of claim 1, wherein said wax is colored with at least one of pigment and dye.

### Claim 5 (depends on 1)

The process of claim 1, wherein said wax is substantially free of colorant.

### Claim 6 (depends on 1)

The process of claim 1, wherein said wax has a melting temperature less than about 100.degree. C.

### Claim 7 (depends on 1)

The process of claim 1, wherein said wax particles are present in an amount from 0.5 to 50% by weight.

### Claim 8 (depends on 1)

The process of claim 1, wherein said wax particles are present in an amount from 1 to 20% by weight.

### Claim 9 (depends on 1)

The process of claim 1, wherein said water phase is present in an amount for 65 to 85% by weight.

### Claim 10

An ink jet printing process for an ink jet printing system which supplies an informational signal pulse, comprising the steps of providing an ink composition comprising wax particles having a melting temperature less than about 150.degree. C. and a diameter ranging from about 0.01 micron to about 2 microns, a water phase in an amount 50 to 99% by weight and a colorant and jetting said ink composition onto a substrate in response to an informational signal pulse.

### Claim 11 (depends on 10)

The process of claim 10, wherein said wax particles include a plasticizer.

### Claim 12 (depends on 10)

The process of claim 10, wherein said wax has a melting temperature less than about 100.degree..

### Claim 13 (depends on 10)

The process of claim 10, wherein said wax particles are present in an amount from 0.05 to 50% by weight.

### Claim 14 (depends on 10)

The process of claim 10, wherein said wax particles are present in an amount from 1 to 20% by weight.

### Claim 15 (depends on 10)

The process of claim 10, wherein said water phase is present in an amount from 65 to 85% by weight.

### Claim 16 (depends on 10)

The process of claim 10, wherein the step of jetting an ink composition comprises providing a vapor bubble in an ink filled channel to expel droplets from a nozzle.

### Claim 17 (depends on 10)

The process of claim 10, wherein the step of jetting an ink composition comprises producing a pressure pulse to expel droplets from a nozzle.

### Claim 18 (depends on 10)

The process of claim 10, additionally comprising heating said ink composition to fuse said wax particles.