Abstract: In an electric airless sprayer (16), as the motor (14) temperature approaches allowable limits, several performance cutbacks can be used to prevent overheating. The preferred method is to gradually reduce the controlled pressure. If the temperature continues to rise, the control (20) switches to on/off or deadband control. If the temperature continues to rise in spite of these measures, the control (20) shuts the unit down.

Abstract: Sensors (18, 20 and 22) and an interactive display (12) are added to an airless gas powered line striping machine (10) to provide the operator with a variety of information about the operating parameters. In addition to the pressure sensor/transducer (14) required to control the pressure through a clutch, the system includes a sensor (reed switch in the preferred embodiment) (18) to count pump strokes or drive revolutions, a sensor (22) to monitor when the gun trigger is activated and a sensor (26) to monitor wheel rotation (hall effect sensor detecting pulses from gear mounted on wheel in the preferred embodiment). A digital display (12) is included to read out measured and calculated values.

Abstract: There are several components on the convertible gas/electric sprayer (12) that facilitate the easy electric motor/gas engine conversion and positioning of the pulley (18) to the drive belt (20) for loading and unloading. The pulley for the gas engine and the pulley for the electric motor have two features that help guide the drive belt (20) onto the pulley (18). The lead in angle (18A) on the front of the pulley (18) helps the belt (20) over the front of the pulley (18). The backstop lip (18C) on the rear of the pulleys prevents the belt (20) from overshooting the V-groove (18D). The fingers (22A) on the upper portion of the bracket hold the belt on the upper drive pulley during conversion and shape the belt to accept the drive pulley, and the rib (22B) on the bracket holds the belt in position to accept the pulley during loading.

Abstract: Packaging for an article or set of articles is provided by a back cardboard sheet (1b) and a front cardboard sheet (1a) sandwiched together. The front cardboard sheet (1a) has a central opening (4) provided therein and is attached to the back sheet (1b) about peripheral regions of the front sheet (1a). The front sheet (1a) remains unattached to the back sheet (1b) in the region surrounding the opening (4). A moulded plastics member (7) has a peripheral edge region (8) held between the unattached regions of the front and back sheets (1a,1b) and has a central portion (10) which projects through the opening (4) in the front sheet (1a) and which provides a housing for the article(s) to be packaged. A pair of perforated seams (5a,5b) extend from opposed edge regions of the front sheet (1a) to the central opening (4).