Abstract: The present invention is directed to an article, system and method for determining and/or selecting the location of a toner engaging member in a developing agent device such as a toner cartridge. The article, system and method may be applied to a printing device such as a laser printer.

Abstract: Described is an apparatus comprising a transimpedance amplifier to receive an input current from a photodiode and provide an output voltage at first and second differential output terminals. A receive signal strength indicator may generate a differential receive signal strength indication (RSSI) signal based, at least in part, upon a voltage across the first and second differential output terminals.

Abstract: A collapsible carrier for an animal comprising a base panel, the base panel having a first end and a second end and containing a floor surface wherein the floor surface includes upwardly extending sidewalls, first and second members end members hingedly attached to the upwardly extending sidewalls at the first and second ends of the base panel. Each of the end members have guideways wherein the base panel and the end members are configured to define an access opening to the base panel floor surface. A slidable door for closing the access opening is provided, wherein the slidable door comprises a leading and a trailing edge, the leading and trailing edge extending between the end members, including a portion that extends into the guideway of the end members.