Trent D Peter

US Patent:

7897318, Mar 1, 2011

Filed:

Nov 29, 2007

Appl. No.:

11/947177

Inventors:

Trent Duane Peter - Johnstown CO, US
Tao Yu - Louisville CO, US

Assignee:

Lexmark International, Inc. - Lexington KY

International Classification:

G03G 9/12

US Classification:

43013714

Abstract:

The present disclosure relates to a process for producing a toner particulate composition from aqueous dispersions containing aggregates of a polymer binder and other toner ingredients. An ionic surfactant may be used to form the dispersion along with an ionic polymer flocculent wherein the ionic polymer flocculent undergoes a molecular conformational change, which may be triggered by pH adjustment, leading to flocculation and particle growth.

US Patent:

8293443, Oct 23, 2012

Filed:

Oct 12, 2007

Appl. No.:

11/871245

Inventors:

Gary Allen Denton - Lexington KY, US
Joseph Edward Johnson - Lexington KY, US
John Melvin Olson - Boulder CO, US
Trent Peter - Johnstown CO, US
Cary Patterson Ravitz - Lexington KY, US
Tao Yu - Louisville CO, US

Assignee:

Lexmark International, Inc. - Lexington KY

International Classification:

G03G 9/09

US Classification:

4301089, 4301081, 4301082, 43010821, 43010823, 430 451, 399159

Abstract:

A toner formulation is disclosed comprising a binder and an IR absorbing black pigment at a concentration of 0. 25-2. 0% by weight, including one or more infrared transmissive pigments, wherein the infrared transmissive pigments are configured to provide a black color. Such toner formulation may provide a response to a toner patch sensor to indicate a mass per unit area of 0. 1-1. 5 mg/cmor a reflectance relative to a substrate to define a reflectance ratio that varies relative to L* values for the toner over the range L*=0-50 or a bulk reflectivity of greater than 6. 0% for a portion of the wavelength range of 850-2000 nanometers.

US Patent:

20050255401, Nov 17, 2005

Filed:

Jun 7, 2004

Appl. No.:

10/862871

Inventors:

John Earley - Boulder CO, US
George Marshall - Boulder CO, US
John Olson - Boulder CO, US
Trent Peter - Johnstown CO, US
Minerva Piffarerio - Erie CO, US
Vincent Ting - Boulder CO, US
Ronald Whildin - Boulder CO, US

International Classification:

G03G009/08

US Classification:

430137100, 430110300

Abstract:

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.

US Patent:

20080090167, Apr 17, 2008

Filed:

Oct 13, 2006

Appl. No.:

11/549251

Inventors:

Ligia Aura Bejat - Versailles KY, US
John Earley - Boulder CO, US
Rick Owen Jones - Berthoud CO, US
George Pharris Marshall - Denver CO, US
John Melvin Olson - Boulder CO, US
Trent Peter - Johnstown CO, US
Minerva Piffarerio - Erie CO, US
Vincent Wen-Hwa Ting - Boulder CO, US
Ronald James Whildin - Boulder CO, US

International Classification:

G03G 9/08

US Classification:

4301371

Abstract:

The present invention relates to a method for combining extra particulate additive with toner. The method includes mixing toner and extra particulate additive in a conical mixer having temperature control. The toner may contain polymeric material having a glass transition temperature (Tg) and the mixing may be carried out wherein the temperature of the mixture is maintained at a temperature less than Tg. The above method may also be applied to a toner formulation that has first undergone a rounding operation.

US Patent:

20190243265, Aug 8, 2019

Filed:

Apr 16, 2019

Appl. No.:

16/385332

Inventors:

- LEXINGTON KY, US
ANNA SARA MCLELAND - COLORADO SPRINGS CO, US
RAHEL BEKRU BOGALE - FIRESTONE CO, US
TRENT DUANE PETER - JOHNSTOWN CO, US

International Classification:

G03G 9/087
G03G 9/08
G03G 9/093

Abstract:

The present disclosure relates generally to a method to make a chemically prepared toner that employs a crash cooling process. In the crash cooling process, an amount of hot toner slurry is added to an external reactor holding an amount of chilled cooling water, wherein the temperature of the chilled cooling water in the external reactor is from about 8 C. to about 25 C. The amount of the chilled cooling water in the external reactor is about 10% to about 40% lower compared to the amount of the added hot toner slurry. Toner prepared using this crash cooling method is cooled at a rate of less than 0.8 C./min. Polyester toners and polyester core shell toners having a borax coupling agent between the toner core and toner shell made from this crash cooling processes using less water results in an improvement to the toner's print density and usage efficiency.

US Patent:

20190243266, Aug 8, 2019

Filed:

Apr 16, 2019

Appl. No.:

16/385343

Inventors:

- Lexington KY, US
Anna Sara McLeland - Colorado Springs CO, US
Rahel Berku Bogale - Firestone CO, US
Trent Duane Peter - Johnstown CO, US

International Classification:

G03G 9/087
G03G 9/08
G03G 9/093

Abstract:

The present disclosure relates generally to a method to make a chemically prepared toner that employs a crash cooling process. In the crash cooling process, an amount of hot toner slurry is added to an external reactor holding an amount of chilled cooling water, wherein the temperature of the chilled cooling water in the external reactor is from about 8 C. to about 25 C. The amount of the chilled cooling water in the external reactor is about 10% to about 40% lower compared to the amount of the added hot toner slurry. Toner prepared using this crash cooling method is cooled at a rate of less than 0.8 C./min. Polyester toners and polyester core shell toners having a borax coupling agent between the toner core and toner shell made from this crash cooling processes using less water results in an improvement to the toner's print density and usage efficiency.

US Patent:

20190243267, Aug 8, 2019

Filed:

Apr 16, 2019

Appl. No.:

16/385358

Inventors:

- LEXINGTON KY, US
ANNA SARA MCLELAND - COLORADO SPRINGS CO, US
RAHEL BEKRU BOGALE - FIRESTONE CO, US
TRENT DUANE PETER - JOHNSTOWN CO, US

International Classification:

G03G 9/087
G03G 9/08
G03G 9/093

Abstract:

The present disclosure relates generally to a method to make a chemically prepared toner that employs a crash cooling process. In the crash cooling process, an amount of hot toner slurry is added to an external reactor holding an amount of chilled cooling water, wherein the temperature of the chilled cooling water in the external reactor is from about 8 C. to about 25 C. The amount of the chilled cooling water in the external reactor is about 10% to about 40% lower compared to the amount of the added hot toner slurry. Toner prepared using this crash cooling method is cooled at a rate of less than 0.8 C./min. Polyester toners and polyester core shell toners having a borax coupling agent between the toner core and toner shell made from this crash cooling processes using less water results in an improvement to the toner's print density and usage efficiency.

US Patent:

20190227451, Jul 25, 2019

Filed:

Apr 3, 2019

Appl. No.:

16/373766

Inventors:

- LEXINGTON KY, US
RAHEL BEKRU BOGALE - FIRESTONE CO, US
TRENT DUANE PETER - JOHNSTOWN CO, US
BRIAN DAVID MUNSON - MEAD CO, US

International Classification:

G03G 9/087
G03G 9/08
G03G 9/093

Abstract:

The present disclosure relates generally to a method to make a chemically prepared toner that employs a crash cooling process. In particular, the crash cooling process involves the addition of a toner slurry having a temperature between 70 C. and 90 C. to an equivalent amount of cold water having a temperature between 5 C. and 20 C. Polyester and styrene acrylic toners as well as polyester core shell toners having a borax coupling agent between the toner core and toner shell made from this cooling process results in an improvement to the amount of toner waste, thereby achieving a higher toner usage efficiency for an electrophotographic printing system.