Gas enclosure assembly and system
View Patent ↗The present teachings relate to various embodiments of an hermetically-sealed gas enclosure assembly and system that can be readily transportable and assemblable and provide for maintaining a minimum inert gas volume and maximal access to various devices and apparatuses enclosed therein. Various embodiments of an hermetically-sealed gas enclosure assembly and system of the present teachings can have a gas enclosure assembly constructed in a fashion that minimizes the internal volume of a gas enclosure assembly, and at the same time optimizes the working space to accommodate a variety of footprints of various OLED printing systems. Various embodiments of a gas enclosure assembly so constructed additionally provide ready access to the interior of a gas enclosure assembly from the exterior during processing and readily access to the interior for maintenance, while minimizing downtime.
1. A gas enclosure assembly and system comprising:
a gas enclosure assembly comprising a plurality of a frame member assembly, wherein the frame member assemblies are sealably joined to define an interior;
an inert gas atmosphere contained in the interior and comprising water and oxygen each at levels of 100 ppm or less; and
a pressurized inert gas recirculating system operably coupled to supply pressurized inert gas to one or more pneumatic devices disposed in the interior, the pressurized inert gas recirculating system comprising:
a compressor loop comprising an inlet in fluid communication with the interior, an outlet in fluid communication with the interior, a loop pathway including the inlet and the outlet, a compressor disposed along the loop pathway between the inlet and the outlet, and an accumulator disposed along the loop pathway between the compressor and the outlet, wherein the accumulator is configured to supply the pressurized inert gas to operate the one or more pneumatic devices disposed in the interior.
2. The gas enclosure assembly and system of claim 1 , further comprising:
a pressure-controlled bypass loop wherein a bypass loop inlet is in fluid communication with the compressor loop via a bypass inlet valve, and wherein a bypass outlet is in fluid communication with the compressor loop at a location between the bypass inlet valve and the compressor.
3. The gas enclosure assembly and system of claim 2 further comprising:
a blower loop comprising an inlet in fluid communication with the interior, an outlet in fluid communication with the interior, a loop pathway including the inlet and the outlet, and an adjustable valve disposed along the loop pathway between the blower and the outlet.
4. The gas enclosure assembly and system of claim 2 , wherein the compressor loop is configured to recirculate pressurized inert gas via the pressure-controlled bypass when a pressure of the inert gas atmosphere in the accumulator exceeds a pre-set threshold pressure.
5. The gas enclosure assembly and system of claim 4 , wherein the pre-set threshold pressure is from about 25 psig to about 200 psig.
6. The gas enclosure assembly and system of claim 1 , wherein the one or more pneumatic devices are chosen from a pneumatic robot, a substrate floatation table, an air bearing, an air bushing, a compressed gas tool, a pneumatic actuator, and combinations thereof.
7. The gas enclosure assembly and system of claim 1 , wherein a seal formed for each of the sealably joined frame member assemblies is a gasket seal.
8. The gas enclosure assembly and system of claim 7 , wherein the gasket seal is fabricated from a closed-cell polymer material.
9. The gas enclosure assembly and system of claim 1 , wherein each of the frame member assemblies comprises a frame member having a plurality of a panel section, wherein each panel section has a panel sealably installed into each panel section.
10. The gas enclosure assembly and system of claim 9 , wherein each panel is sealably installed into each panel section via a gasket seal.
11. The gas enclosure assembly and system of claim 10 , wherein the gasket seal is fabricated from a closed-cell polymer material.
12. The gas enclosure assembly and system of claim 1 , wherein the gas enclosure is hermetically sealed.
13. The gas enclosure assembly and system of claim 1 , wherein the inert gas atmosphere in the interior is maintained at an interior pressure above ambient pressure.
14. The gas enclosure assembly and system of claim 13 , wherein the interior pressure ranges from about 2 mbarg to about 8 mbarg.
15. The gas enclosure assembly and system of claim 13 , wherein the interior pressure is less than a pressure of the pressurized inert gas supply to the one or more pneumatic devices.
16. The gas enclosure assembly and system of claim 1 , wherein the inert gas atmosphere is inert to a flat panel display printing process.
17. The gas enclosure assembly and system of claim 16 , wherein the inert gas atmosphere is a nitrogen atmosphere.
18. The gas enclosure assembly and system of claim 1 , further comprising an inkjet printing apparatus disposed in the interior.
19. The gas enclosure assembly and system of claim 1 , further comprising a gas circulation and filtration system.
20. The gas enclosure assembly and system of claim 1 , further comprising
a printing apparatus disposed in the interior and configured to dispense material to a substrate.
21. The system of claim 20 , wherein the printing apparatus comprises:
at least one printhead;
a substrate support apparatus; and
a motion system configured to impart relative movement between the at least one printhead and the substrate.
22. The system of claim 21 , wherein the substrate support apparatus comprises a floatation table.
23. The system of claim 22 , wherein the outlet of the pressurized inert gas recirculating system is operably coupled to flow pressurized inert gas to the floatation table.
24. The system of claim 20 , wherein the inert gas atmosphere is a nitrogen atmosphere.
25. The system of claim 20 , wherein the interior is maintained at an interior pressure above ambient.
26. The system of claim 20 , wherein the printing apparatus is configured to dispense to the substrate an ink for flat panel display manufacturing.
27. The system of claim 20 , wherein the inert gas atmosphere is inert to a printing process performed via the printing apparatus.
28. The system of claim 20 , wherein the inert gas atmosphere is inert to a flat panel display manufacturing process.