发明名称 |
METHOD AND APPARATUS FOR DISPENSING SMALL AMOUNTS OF LIQUID MATERIAL |
摘要 |
Apparatus and methods for dispensing droplets of liquid or viscous material are disclosed. A valve is opened to dispense a stream of the heated liquid or viscous material through an elongated orifice of a nozzle. The stream of material being dispensed from the elongated orifice is broken into droplets by rapidly closing the valve. Furthermore, a method for varying the height of a droplet of liquid or viscous material is disclosed by which two or more droplets combine to form a droplet of a desired height. A method for applying a plurality of droplets of material onto a substrate so that the droplets flow together to form a uniform film of desired thickness and shape is also disclosed. A second embodiment of the invention relates to dispensing apparatus with a heater assembly removably attached to the dispenser housing. Another modification of the invention relates to a modified seat assembly wherein the valve has three positions with respect to the valve seat and a modified nozzle assembly wherein the nozzle is constructed of a thin walled tube.
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申请公布号 |
WO9718054(A1) |
申请公布日期 |
1997.05.22 |
申请号 |
WO1996US18380 |
申请日期 |
1996.11.12 |
申请人 |
NORDSON CORPORATION |
发明人 |
SMITH, JAMES, C.;HOGAN, PATRICK, T.;SAIDMAN, LAURENCE, B. |
分类号 |
B05D1/26;B05C5/00;B05C5/02;B05C11/10;B05D3/00;B23K1/20;B23K3/00;B23K3/06;F16K1/32;G01F13/00;H05K3/34;(IPC1-7):B23K1/20 |
主分类号 |
B05D1/26 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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