Abstract: One embodiment of the invention is directed to a data processing system that includes an electrical detection circuit to determine whether the electrical power is going from “on” to “off,” or changing from “off” to “on;” a peripheral device, including a processor to calculate the amount of electrical energy required for the peripheral device to perform a task; a task queue for the peripheral device that can be read to find a task if the electrical power is going from “on” to “off;” and a non-volatile memory, including a task queue to store data describing the task if insufficient electrical energy remains available to the peripheral device to complete the task.

Abstract: A method and apparatus to handle power supply failures to a peripheral device in a data processing system. One embodiment of the invention involves a method to handle a power failure during the performance of a task, wherein the peripheral device receives electrical power from a power supply, and the peripheral device is part of a data processing system that also contains a non-volatile memory. The method includes monitoring the power supply to determine whether the electrical power is going from “on” to “off,” or going from “off” to “on.

Abstract: One embodiment of the invention is directed to a data processing system that includes an electrical detection circuit to determine whether the electrical power is going from “on” to “off,” or changing from “off” to “on;” a peripheral device, including a processor to calculate the amount of electrical energy required for the peripheral device to perform a task; a task queue for the peripheral device that can be read to find a task if the electrical power is going from “on” to “off;” and a non-volatile memory, including a task queue to store data describing the task if insufficient electrical energy remains available to the peripheral device to complete the task.

Abstract: A system and method converts color data to gray data by allowing target values to be set for the color components and combinations of the color components to provide high quality gray data output.

Abstract: A system and method converts color data to gray data by allowing target values to be set for the color components and combinations of the color components to provide high quality gray data output.

Abstract: A matte laser printer produces a photographic like image on media by repeatedly fusing the toners deposited thereon. In a preferred embodiment, repeated fusing is accomplished by utilizing a duplexing path in the printer. In an alternate embodiment, a processing flow direction of the media is selectively reversed after fusing to enable multiple fusing operations. In either case, toner forming the image on the media is more fully fused, thereby reducing light scatter, such that a photographic like image is produced.

Abstract: Electrophotographic printers are provided with a roller type, sheet pretreatment device for providing successive sheets with substantially the same moisture content and, hence, substantially the same electrostatic properties.

Abstract: Electrophotographic printers are provided with a roller type, sheet pretreatment device for providing successive sheets with substantially the same moisture content and, hence, substantially the same electrostatic properties.

Abstract: A method and apparatus are presented in which gloss level is varied between individual elements printed on a single media sheet. The sheet of media is fed into a print engine with a first side of the sheet of media in position to be printed upon. A first element on the first side of the sheet of media is printed with a first gloss level finish. The sheet of media is circulated in a duplex media path so that the sheet of media is again fed into the print engine but with a second side of the sheet of media in position to be printed upon. The sheet of media is again circulated in the duplex media path so that the sheet of media is fed into the print engine with the first side of the sheet of media in position to be printed upon. A second element is printed on the first side of the sheet of media with a second gloss level finish.

Abstract: A matte laser printer produces a photographic like image on media by repeatedly fusing the toners deposited thereon. In a preferred embodiment, repeated fusing is accomplished by utilizing a duplexing path in the printer. In an alternate embodiment, a processing flow direction of the media is selectively reversed after fusing to enable multiple fusing operations. In either case, toner forming the image on the media is more fully fused, thereby reducing light scatter, such that a photographic like image is produced.

Abstract: A matte laser printer produces a photographic like image on media by repeatedly fusing the toners deposited thereon. In a preferred embodiment, repeated fusing is accomplished by utilizing a duplexing path in the printer. In an alternate embodiment, a processing flow direction of the media is selectively reversed after fusing to enable multiple fusing operations. In either case, toner forming the image on the media is more fully fused, thereby reducing light scatter, such that a photographic like image is produced.

Abstract: A color table calibration system produces multiple color samples for each target color point in a color table. Each sample is offset from the target color within the color space by a random amount that is equal to a fixed offset plus a random interval. In the preferred implementation, the fixed offset is equal to a distance approximately equal to the color excursion caused by noise and the random interval is constrained to not exceed the fixed offset. The color table calibration system prints a set of multiple samples for each color point. The color samples are measured using conventional measuring devices and then averaged. The color table calibration system uses the sample average to derive a calibrated color table. The pseudo random supersampling and averaging for each color point reduces errors introduced by mechanical and environmental variations.