Abstract: A process including:
dispersing a first liquid developer concentrate comprising a resin, a colorant, and a liquid developer reconstitution compound, in a carrier liquid, into additional carrier liquid to form a second liquid developer;
depositing the second liquid developer onto a liquid receiver member to form a developer cake;
developing an image with the developer cake;
reclaiming undeveloped developer cake from the cake bearing liquid receiver member; and
redispersing the reclaimed undeveloped developer cake in the second developer liquid.
Type:
Grant
Filed:
February 28, 2000
Date of Patent:
November 9, 2004
Assignee:
Xerox Corporation
Inventors:
Weizhong Zhao, Thomas W. Smith, David H. Pan, William M. Prest, Jr., Samuel Kaplan
Abstract: An organic light emitting device (OLED) has a thick (100 to 250 nanometers) porphyrin buffer layer between the anode and the luminescent region. The thick porphyrin buffer layer in the OLED results in a small increase in device operating voltage, reduces the possibility of OLED shorting and can improve color purity in blue emitting OLEDs due to its significant optical absorption in the red range.
Type:
Grant
Filed:
July 29, 2002
Date of Patent:
November 2, 2004
Assignee:
Xerox Corporation
Inventors:
Hany Aziz, Zoran D. Popovic, Nan-Xing Hu, Ah-Mee Hor
Abstract: A latex used for the preparation of toner particles by emulsion aggregation is prepared, using a controlled addition of anionic surfactants, without the use of a nonionic surfactant. Such a process comprises preparing an aqueous phase using a limited amount of anionic surfactant; preparing an emulsion of monomers in water with additional anionic surfactant and without a nonionic surfactant; adding a portion of the emulsion to the aqueous phase to initiate seed polymerization, in the presence of an initiator, to form seed polymer; and adding the remaining monomer emulsion to the composition to complete polymerization to form a latex polymer.
Type:
Grant
Filed:
January 19, 2000
Date of Patent:
September 25, 2001
Assignee:
Xerox Corporation
Inventors:
Allan K. Chen, Chieh-Min Cheng, Tie Hwee Ng, George Liebermann