Lexmark International, Inc.

Minerva Piffarerio

John Melvin Olson

Vincent Wen-Hwa Ting

Trent Duane Peter

George P Marshall

Bryan Patrick Livengood

Michael Thomas Moore

James Craig Minor

John Joseph Earley

Ronald James Whildin

Toner is rounded by vigorously mixing less than about 5 percent by weight of particulate silica to the total weight of a starting toner in a closed, recirculating air system. The starting toner contains at least about 4.5 percent by weight of the starting toner of a wax and additionally contains at least 5 percent by weight of the starting toner of a softening agent. The temperature during the mixing is no more than 13 degrees C. above the onset of the glass transition temperature of the starting toner. The final toner comprises rounded starting toner having particulate silica embedded during the mixing process.

Closed air circulation toner rounding

Toner particulates include a first resin comprising a cross-linked copolymer; a second resin comprising a non-cross-linked copolymer; and a wax comprising an ethylene propylene copolymer. The cross-linked copolymer is a copolymer other than the wax comprising an ethylene propylene copolymer and the non-cross-linked polymer is a copolymer other than the wax comprising an ethylene propylene copolymer.

Toner particulates comprising an ethylene propylene wax

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Erie, CO, United States of America

Minerva Piffarerio