Patent ID: 8215535
Filing Date: 2012-07-10
Classification: B05B,B23K,H05K

Abstract:
1. A system for jetting droplets of viscous medium onto a substrate, comprising: a jetting nozzle from which the droplets of viscous medium are jetted, wherein the jetting nozzle comprises a nozzle outlet facing the substrate, and wherein the interior of the jetting nozzle defines a nozzle space arranged to receive viscous medium to be jetted; a feeder for feeding viscous medium into said nozzle space of said jetting nozzle; an impacting device for impacting said viscous medium, thereby producing jetting of viscous medium from the nozzle space in the form of droplets through the nozzle outlet towards the substrate; and a control unit arranged for controlling said feeder, between each impact, to feed a controlled amount of said viscous medium into the nozzle space to adjust the volume of viscous medium in the nozzle space, such that the amount of said viscous medium fed into the nozzle space for the subsequent jetting of droplets is varied in dependence on a desired specific volume of each individual droplet to be jetted, wherein the volume of each individual droplet to be jetted is varied independent of a stroke length of the impacting device.