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Browse Prior Art Database

Coating Solution Supply

IP.com Disclosure Number: IPCOM000076111D
Original Publication Date: 1972-Jan-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 2 page(s) / 27K

Publishing Venue

IBM

Related People

Terwilliger, HW: AUTHOR

Abstract

A coating solution supply tank 1, having a conical shape, is provided with outlet 2 in the vertex of the tank. Inserted into the throat of the outlet of the tank is thermocouple 4. The positioning of thermocouple 4 in the throat of outlet 2 allows an accurate temperature determination and thus temperature control, regardless of the quantity of material in the tank. Outlet 2 joins onto outlet header 7 which is, in turn, connected to a fountain supply connection having valve 5 and return bypass 6 having its respective valve. This allows either complete supply to the coating head fountain or a complete return, or any combination of the two.

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Coating Solution Supply

A coating solution supply tank 1, having a conical shape, is provided with outlet 2 in the vertex of the tank. Inserted into the throat of the outlet of the tank is thermocouple 4. The positioning of thermocouple 4 in the throat of outlet 2 allows an accurate temperature determination and thus temperature control, regardless of the quantity of material in the tank. Outlet 2 joins onto outlet header 7 which is, in turn, connected to a fountain supply connection having valve 5 and return bypass 6 having its respective valve. This allows either complete supply to the coating head fountain or a complete return, or any combination of the two.

The coating solution is fed by pump 3, which is of the positive displacement type. Since highly volatile solvents are used in many coating environments, the positive displacement pump does not form bubbles in the solution which are detrimental in the coating operation. Further, by control of the valves in the output line and the bypass, the amount of recirculation by the pump may be controlled which enhances the capability of maintaining a dispersion in its dispersed form.

An additional advantage of the conical holding tank 1 is that the volume-to- surface area ratio remains essentially constant during the drawing of the solution from the tank. This allows a more uniform control of temperature. The conical tank shape and the pump arrangement provides for easy cleaning the tank and related plumbing after us...