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2 results about "Xerography" patented technology
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Xerography or electrophotography is a dry photocopying technique. Its fundamental principle was invented by American physicist Chester Carlson and based on Hungarian physicist Pál Selényi's publications. Chester Carlson applied for and was awarded U.S. Patent 2,297,691 on October 6, 1942. The technique was originally called electrophotography. It was later renamed xerography—from the Greek roots ξηρός xeros, "dry" and -γραφία -graphia, "writing"—to emphasize that, unlike reproduction techniques then in use such as cyanotype, this process used no liquid chemicals.
Systems and methods of dry bioprinting with dry mixed biopolymers
Methods of laser printing include xerographic printing, printing via patterns of electrostatic charge, and / or laser printing onto a substrate with a dry mixed silk fibroin toner to produce a printed article. The dry mixed silk fibroin toner is formed by dry mixing a silk fibroin powder with a pigment powder and / or a dye powder. Laser printing can also be with a silk fibroin biotoner powder formed by mixing a silk fibroin powder and an enzyme solution, and optionally a pigment powder and / or a dye powder, to form a biotoner solution, wherein the biotoner solution is spray dried to form the silk fibroin biotoner powder. Laser printing cartridges may be loaded with a dry mixed silk fibroin toner or a silk fibroin biotoner powder.
Owner:TRUSTEES OF TUFTS COLLEGE