Abstract:
An image forming apparatus in accordance with the invention includes a print engine with a photoreceptor, a laser exposure device for creating an image on the photoreceptor and one or more toning stations for toning the photoreceptor, after imaging. A system for enabling adjustment of the apparatus performance characteristics further includes a sensor for detecting characteristics of a toned image on the photoreceptor. A memory is provided for storing control parameters used to adjust operations of the printer; desired image characteristic parameters and previously measured image parameters. A processor is responsive to a performance assessment procedure for causing the print engine to create a toned test image on the photoreceptor. The processor then compares signals that are indicative of characteristic parameters of the toned test image with desired image characteristic parameters from the memory. Thereafter, in accordance with the comparison, the processor adjusts printer control parameters to bring the characteristics of the printed image closer to those which are dictated by the desired image characteristic parameters.
Abstract:
A consumable product such as a toner cartridge for a laser printer includes a messaging device connected thereto. The messaging device is adapted to receive a control signal from the printer or other host, the control signal being indicative of a use status for the consumable product, such as "toner low". The control signal produces a visual effect upon the messaging device such that a message or a change in message concerning the consumable product is indicated thereby. The message or change in message is, alternatively, indicative of an identifier for the consumable product. The messaging device is a resistive heater substrate having at least one layer of thermochromatic ink disposed thereon. In an alternate embodiment, the message or change in message is effected by a change in temperature upon the messaging device, rather than by a direct control signal. In another alternate embodiment, a fuse is connected to the messaging device for providing further information to the printer system.
Abstract:
An information collection system is used to improve the efficiency and accuracy of the collection of information for warranty database for printers. The system includes an information reading device attached to a computer system. Printer configuration and performance parameters which are to be collected are printed on a selftest page encoded as a bar code. In the preferred embodiment of the information collection system, the information reading device is a standard hand held bar code reader and the computer system is a portable computer. A windows based bar code reading utility is used to decode the data from the bar code reader. Information would be collected from the printer by printing a selftest page including the bar code, reading the bar code using the bar code reader, and storing the information decoded by the bar code reading utility on the hard disk drive of the computer system. At a later time, the data is transferred to the warranty database over a communications link such as a modem.
Abstract:
An apparatus and method for depositing toner on substantially the entire surface of the photoconductor to minimize print defects associated with surface contamination. This is accomplished by printing a background pattern along with the desired image. A light film of toner is deposited on the background areas of the photoconductor while a more dense film of toner is deposited on the image areas. The invention may be implemented by merging a background pattern, such as a uniform level of gray, with the print image data or by varying the charging conditions at photoconductive drum. In one implementation of the invention, a background pattern such as a uniform level of gray is printed by scanning the pattern onto the photoconductor as part of the imaging light exposure process. In a second implementation of the invention, the background gray is printed by adjusting the charging potential applied to photoconductor and/or the various roller bias voltages.
Abstract:
In one embodiment, enablement data, indicative of an enablement state of a functionality at a network-connected printer, is received from the printer. Fulfillment data, indicative of a fulfillment state of a condition to the enablement of the functionality at the printer, is received. It is determined whether the enablement data is consistent with the fulfillment data. Responsive to determining that the enablement data is inconsistent with the fulfillment data, a change instruction is sent to the printer over a network to cause a change in the enablement state to another state that is consistent with the fulfillment data.
Abstract:
A consumable having a memory device for storing information such as usage information to be used by a the original manufacturer or re-manufacturer. The memory device can also be used to provided software updates or patches for the microcomputers within an image forming or other office automation device.
Abstract:
In one embodiment, enablement data, indicative of an enablement state of a functionality at a network-connected printer, is received from the printer. Fulfillment data, indicative of a fulfillment state of a condition to the enablement of the functionality at the printer, is received. It is determined whether the enablement data is consistent with the fulfillment data. Responsive to determining that the enablement data is inconsistent with the fulfillment data, a change instruction is sent to the printer over a network to cause a change in the enablement state to another state that is consistent with the fulfillment data.
Abstract:
An anti-fraud pull tab system for removable protective barriers in print cartridges and other modular components used in printers, copiers and other image forming devices. The pull tab includes a pull ring and a use indicator. The use indicator blocks a substantial portion of the finger hole in the pull ring so that the use indicator is broken out, damaged or disfigured when the pull tab is used to remove the protective barrier. The disfigured pull tab indicates the protective barrier has been used, thus making it difficult for a counterfeiter to successfully re-use or reform the protective barrier and resell the cartridge as a new cartridge. In an alternative embodiment of the invention, a pull tab assembly includes a pull tab and an identifying tape. The tape secures the pull tab to the print cartridge. Affixed to the tape is a use indicator that will permanently adhere to the print cartridge when the identifying tape is removed from the cartridge. When a pull tab is unnecessary or undesirable, the identifying tape may be attached directly to the end of the protective barrier.