Abstract: Embodiments include a bar for a chain saw that is equipped with one or more oil channels that run along the length of the bar. Each oil channel receives oil at a first end, which exits the oil channel at an oil exit aperture at a second end of the channel. The oil exit aperture of one of the channels is positioned along the side of a bar groove, through which runs the saw chain, proximate to the cutting area of the bar to lubricate the saw chain just prior to the cutting area. A second channel may have an oil exit aperture proximate to the nose of the bar, to lubricate a sprocket wheel in the nose of the bar.

Abstract: A method increases the ability of a controller in a printer to detect weak or missing inkjets in the printer. The method includes generating a test pattern having at least twice as much ink as a typical test pattern used to detect weak or missing inkjets. The increased ink appropriately stresses inkjets to facilitate detection of weak or missing inkjets and the test pattern is transferred to media and removed from the printer to preserve the capacity of a drum maintenance unit to store residual ink removed from an imaging drum or belt.

Abstract: A method and apparatus are provided for cleaning a first set and a second set of a staggered full-width array printhead assembly (SFWA) in an inkjet printer.