Printer with liquid enhanced fixing system
View Patent ↗Printers are provided. One printer has an ink jet printer with an inkjet printhead to print an inkjet image on a receiver using an inkjet ink having a liquid with a boiling point a toner print engine to generate a toner image conforming to the ink jet image using toner particles with a glass transition temperature that is below the boiling point and to transfer the toner image into an unabsorbed volume of liquid ink of the inkjet image on the receiver and a fixing system having a first energy source to apply a first energy to the toner and the liquid sufficient to bring the liquid to the boiling point without bringing a heated surface into contact therewith. The toner particles are heated above the glass transition temperature by the combination of heat from the liquid and heating of the toner particles by the first energy.
1. A printer comprising:
an ink jet printer having an inkjet printhead to print an inkjet image on a receiver using an inkjet ink having a liquid with a boiling point;
a toner print engine to generate a toner image conforming to the ink jet image using toner particles with a glass transition temperature that is below the boiling point and to transfer the toner image into an unabsorbed volume of liquid ink of the inkjet image on the receiver; and
a fixing system having a first energy source to apply a first energy to the toner particles and the liquid sufficient to bring the liquid to the boiling point without bringing a heated surface into contact therewith;
wherein the toner particles are heated above the glass transition temperature by the combination of heat from the liquid and heating of the toner particles by the first energy source so the toner particles will cohesively bond to other toner particles and will adhesively bond to the receiver without requiring heating of the receiver to the glass transition temperature of the toner particles.
2. The printer of claim 1 , wherein the liquid has a specific heat that is less than a specific heat of the toner particles.
3. The printer of claim 1 , wherein an amount of energy required to heat the toner particles to the glass transition temperature with toner particles in the liquid is less than an amount of energy that would be required to heat the toner particles to the glass transition temperature if the toner particles were not transferred into an unabsorbed volume of liquid ink.
4. The printer of claim 1 , wherein an amount of first energy required to heat the toner particles to the glass transition temperature is sufficient to bring the liquid to the boiling point.
5. The printer of claim 1 , wherein the liquid conforms to a shape of the toner particles so as to provide a greater surface area of contact between the liquid and the toner particles than is provided between the receiver and the toner particles.
6. The printer of claim 1 , wherein toner particles in an unabsorbed volume of the liquid can be brought to a glass transition temperature at a faster rate than toner particles that are not in an unabsorbed volume of the liquid using an equivalent exposure to the first energy.
7. The printer of claim 1 , wherein the liquid is water or an alcohol.
8. The printer of claim 1 wherein the liquid is hydrophilic.
9. The printer of claim 1 , wherein the toner particles are sintered so that vapor pressure from the liquid can pass between toner particles so that the vapor pressure does not accumulate within the toner image.
10. The printer of claim 1 , wherein the first energy source comprises a radiant energy source.
11. The printer of claim 1 , wherein the first energy source is a source of at least one of infrared radiation, optical radiation, and radio frequency radiation.
12. The printer of claim 1 , wherein the first energy source is a source of a flow of a heated gas directed at toner and ink.