The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 06, 2007
Filed:
Nov. 25, 2003
Raymond W. Wong, Mississauga, CA;
Hadi K. Mahabadi, Mississauga, CA;
Paul F. Smith, Oakville, CA;
Sheau V. Kao, Oakville, CA;
Michael S. Hawkins, Cambridge, CA;
Caroline M. Turek, Hamilton, CA;
Raymond W. Wong, Mississauga, CA;
Hadi K. Mahabadi, Mississauga, CA;
Paul F. Smith, Oakville, CA;
Sheau V. Kao, Oakville, CA;
Michael S. Hawkins, Cambridge, CA;
Caroline M. Turek, Hamilton, CA;
Xerox Corporation, Stamford, CT (US);
Abstract
Disclosed is a process for preparing a phase change ink composition which comprises (a) a phase change ink carrier, said carrier comprising at least one nonpolar component and at least one polar component, and (b) pigment particles, said process comprising (1) selecting at least one of the polar carrier components to be a pigment particle dispersant; (2) admixing the pigment particles with the dispersant; (3) extruding the mixture of pigment particles and dispersant in an extruder at a temperature that is at or above about the peak crystallization temperature of the dispersant and below about the peak melting temperature of the dispersant, thereby forming a pigment dispersion; (4) subsequent to extrusion of the pigment dispersion, adding to the pigment dispersion any remaining polar components and the nonpolar component; and (5) subjecting the resulting mixture of pigment dispersion, polar component, and nonpolar component to high shear mixing to form an ink.