Patents by Inventor Anna Sara McLeland
Anna Sara McLeland has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10606182Abstract: 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, hot toner slurry is added to an external reactor containing a coolant comprised of previously cooled toner slurry in combination with cooled de-ionized water. The previously cooled toner slurry found in the coolant has the same toner composition as the incoming hot toner slurry. Also, the amount of the coolant in the external reactor is equivalent to the amount of incoming hot toner slurry. Polyester toners and polyester core shell toners having a borax coupling agent between the toner core and toner shell made from this crash cooling process results in an improvement to the toner performance especially a decrease in the overall toner usage.Type: GrantFiled: April 16, 2019Date of Patent: March 31, 2020Assignee: LEXMARK INTERNATIONAL, INC.Inventors: Kasturi Rangan Srinivasan, Anna Sara McLeland, Rahel Bekru Bogale
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Patent number: 10591834Abstract: 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.Type: GrantFiled: April 16, 2019Date of Patent: March 17, 2020Assignee: LEXMARK INTERNATIONAL, INC.Inventors: Kasturi Rangan Srinivasan, Anna Sara McLeland, Rahel Bekru Bogale, Trent Duane Peter
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Patent number: 10591832Abstract: 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, hot toner slurry is added to an external reactor containing a coolant comprised of previously cooled toner slurry in combination with cooled de-ionized water. The previously cooled toner slurry found in the coolant has the same toner composition as the incoming hot toner slurry. Also, the amount of the coolant in the external reactor is equivalent to the amount of incoming hot toner slurry. Polyester toners and polyester core shell toners having a borax coupling agent between the toner core and toner shell made from this crash cooling process results in an improvement to the toner performance especially a decrease in the overall toner usage.Type: GrantFiled: April 16, 2019Date of Patent: March 17, 2020Assignee: LEXMARK INTERNATIONAL, INC.Inventors: Kasturi Rangan Srinivasan, Anna Sara McLeland, Rahel Bekru Bogale
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Patent number: 10591831Abstract: 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, hot toner slurry is added to an external reactor containing a coolant comprised of previously cooled toner slurry in combination with cooled de-ionized water. The previously cooled toner slurry found in the coolant has the same toner composition as the incoming hot toner slurry. Also, the amount of the coolant in the external reactor is equivalent to the amount of incoming hot toner slurry. Polyester toners and polyester core shell toners having a borax coupling agent between the toner core and toner shell made from this crash cooling process results in an improvement to the toner performance especially a decrease in the overall toner usage.Type: GrantFiled: April 16, 2019Date of Patent: March 17, 2020Assignee: LEXMARK INTERNATIONAL, INC.Inventors: Kasturi Rangan Srinivasan, Anna Sara McLeland, Rahel Bekru Bogale
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Patent number: 10591835Abstract: 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.Type: GrantFiled: April 16, 2019Date of Patent: March 17, 2020Assignee: LEXMARK INTERNATIONAL, INC.Inventors: Kasturi Rangan Srinivasan, Anna Sara McLeland, Rahel Bekru Bogale, Trent Duane Peter
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Patent number: 10591833Abstract: 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.Type: GrantFiled: April 16, 2019Date of Patent: March 17, 2020Assignee: LEXMARK INTERNATIONAL, INC.Inventors: Kasturi Rangan Srinivasan, Anna Sara McLeland, Rahel Bekru Bogale, Trent Duane Peter
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Publication number: 20190243264Abstract: 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, hot toner slurry is added to an external reactor containing a coolant comprised of previously cooled toner slurry in combination with cooled de-ionized water. The previously cooled toner slurry found in the coolant has the same toner composition as the incoming hot toner slurry. Also, the amount of the coolant in the external reactor is equivalent to the amount of incoming hot toner slurry. Polyester toners and polyester core shell toners having a borax coupling agent between the toner core and toner shell made from this crash cooling process results in an improvement to the toner performance especially a decrease in the overall toner usage.Type: ApplicationFiled: April 16, 2019Publication date: August 8, 2019Inventors: KASTURI RANGAN SRINIVASAN, ANNA SARA MCLELAND, RAHEL BEKRU BOGALE
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Publication number: 20190243267Abstract: 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.Type: ApplicationFiled: April 16, 2019Publication date: August 8, 2019Inventors: KASTURI RANGAN SRINIVASAN, ANNA SARA MCLELAND, RAHEL BEKRU BOGALE, TRENT DUANE PETER
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Publication number: 20190243265Abstract: 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.Type: ApplicationFiled: April 16, 2019Publication date: August 8, 2019Inventors: KASTURI RANGAN SRINIVASAN, ANNA SARA MCLELAND, RAHEL BEKRU BOGALE, TRENT DUANE PETER
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Publication number: 20190243263Abstract: 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, hot toner slurry is added to an external reactor containing a coolant comprised of previously cooled toner slurry in combination with cooled de-ionized water. The previously cooled toner slurry found in the coolant has the same toner composition as the incoming hot toner slurry. Also, the amount of the coolant in the external reactor is equivalent to the amount of incoming hot toner slurry. Polyester toners and polyester core shell toners having a borax coupling agent between the toner core and toner shell made from this crash cooling process results in an improvement to the toner performance especially a decrease in the overall toner usage.Type: ApplicationFiled: April 16, 2019Publication date: August 8, 2019Inventors: KASTURI RANGAN SRINIVASAN, ANNA SARA MCLELAND, RAHEL BEKRU BOGALE
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Publication number: 20190243266Abstract: 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.Type: ApplicationFiled: April 16, 2019Publication date: August 8, 2019Inventors: Kasturi Rangan Srinivasan, Anna Sara McLeland, Rahel Berku Bogale, Trent Duane Peter
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Publication number: 20190243262Abstract: 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, hot toner slurry is added to an external reactor containing a coolant comprised of previously cooled toner slurry in combination with cooled de-ionized water. The previously cooled toner slurry found in the coolant has the same toner composition as the incoming hot toner slurry. Also, the amount of the coolant in the external reactor is equivalent to the amount of incoming hot toner slurry. Polyester toners and polyester core shell toners having a borax coupling agent between the toner core and toner shell made from this crash cooling process results in an improvement to the toner performance especially a decrease in the overall toner usage.Type: ApplicationFiled: April 16, 2019Publication date: August 8, 2019Inventors: KASTURI RANGAN SRINIVASAN, ANNA SARA MCLELAND, RAHEL BEKRU BOGALE