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:
Apr. 12, 2005
Filed:
Nov. 25, 2003
Stephan V. Drappel, Toronto, CA;
Marcel P. Breton, Mississauga, CA;
James D. Mayo, Mississauga, CA;
Raymond W. Wong, Mississauga, CA;
Christine E. Bedford, Burlington, CA;
Danielle C. Boils-boissier, Mississauga, CA;
Sandra J. Gardner, Oakville, CA;
Paul F. Smith, Oakville, CA;
Stephan V. Drappel, Toronto, CA;
Marcel P. Breton, Mississauga, CA;
James D. Mayo, Mississauga, CA;
Raymond W. Wong, Mississauga, CA;
Christine E. Bedford, Burlington, CA;
Danielle C. Boils-Boissier, Mississauga, CA;
Sandra J. Gardner, Oakville, CA;
Paul F. Smith, Oakville, CA;
Xerox Corporation, Stamford, CT (US);
Abstract
Phase change ink compositions comprising (a) an ink carrier comprising a monoamide and a tetra-amide, and (b) pigment particles having oxygen-containing functional groups on the surfaces thereof. Also, processes for preparing a phase change ink which comprise (a) melting a tetra-amide which is solid at about 25° C.; (b) admixing with the molten tetra-amide pigment particles having oxygen-containing functional groups on the surfaces thereof; (c) maintaining the mixture of pigment and tetra-amide at a temperature of at least about 100° C. and at a temperature of no more than about 200° C. for a period sufficient to enable the molten tetra-amide to wet the pigment particle surfaces; (d) subsequent to wetting of the pigment particle surfaces with the molten tetra-amide, adding to the mixture a monoamide; (e) subsequent to addition of the monoamide, subjecting the resulting mixture to high shear mixing; and (f) subsequent to subjecting the mixture to high shear mixing, optionally adding to the mixture additional ink ingredients.