Method and apparatus for dispensing material in printer

一种用来把粘性材料印刷在预定位置上以便在基材上形成图案的印刷机(10)。印刷机(10)包括机座(12)；安装在机座(12)上的设备，该设备有为形成图案而安排的大量的孔眼；与机座耦合的支撑器械，该支撑器械在所述装置下方把基材支撑在印刷位置上；以及材料分配器。材料分配器具有容纳打算印到基材上的粘性材料的腔室(110)。腔室(110)有供被分配的粘性材料通过的分配孔。材料分配器与机座(12)耦合，被定位在所述装置上方，并且其结构和安排适合通过所述装置上的孔眼把粘性材料分配到基材上。材料分配器有回缩装置，该回缩装置在完成分配后阻止粘性材料从分配孔泄漏。 A printer for printing a viscous material at predetermined positions forming a pattern on a substrate. The printer includes a frame, a device, mounted to the frame, having a number of perforations arranged to form the pattern, a support apparatus, coupled to the frame, that supports the substrate in a printing position beneath the device, and a material dispenser. The material dispenser has a chamber to contain the viscous material to be printed on the substrate. The chamber has an opening through which the viscous material is dispensed. The material dispenser is coupled to the frame, positioned over the device, and constructed and arranged to dispense the viscous material through the perforations in the device and onto the substrate. The material dispenser has a retraction device that prevents leakage of the viscous material from the opening after dispensing is complete.