Spray device

[0028]FIGS. 1 and 2 show an exemplary embodiment of a spray device 100 of the present invention. Screw cap 12 is threaded onto body member 2 and holds nozzle tip 11 in place. Exit orifice 10 is visible on the front on spray device 100 as is flat-bottom slot 13. Solenoid 4 is mounted to the side of body 2 for actuating a valve element 16 inside of solenoid 4, to repeatedly interrupt a flow of liquid through the spray device and cause pulsed spraying.

[0029] The paths of the liquid and gas through the spray device are visible in the sectional views of FIG. 3 (showing a sectional view through line A-A of FIG. 1) and in FIG. 4 (showing a sectional view through line B-B of FIG. 3). A liquid enters the body member 2 through liquid supply conduit 1. Where the spray device is used for dampening a plate cylinder on a printing press, the liquid is typically a fountain solution of water that includes additives to reduce its surface tension. In other applications of the spray device, the liquid ma