Direct feed extruder supply system

Details Direct feed extruder supply system Direct feed extruder supply system

2006-08-15

2006-08-15

Koch, George (Department: 1734)

Coating apparatus

Control means responsive to a randomly occurring sensed...

Responsive to attribute, absence or presence of work

C118S685000, C118S681000, C118S680000, C118S679000, C118S712000

Reexamination Certificate

active

07090726

ABSTRACT:
A pair of hoses connects directly from the feed pumps to the extruder without utilizing a PCV (pressure compensating valve). Each feed unit has automatic air pressure relief through a solenoid valve on top of the feed unit so that the unit does not stall at full static line pressure. When the dispense valve at the extruder is shut off, air pressure to the air motor is dumped. A pair of electric eyes is utilized—the first signals the pump (by providing pressurized air) to provide pressure while the second actually opens the extruder when the article to be coated comes into position. The first valve is located only a short distance ahead of the second valve so that the line pressure does not have a chance to exceed the dynamic pressure before the extruder opens.

REFERENCES:
patent: 5531233 (1996-07-01), Oglesby et al.
patent: 6299931 (2001-10-01), Leary et al.
patent: 6371174 (2002-04-01), Zook et al.
patent: 6379464 (2002-04-01), Martel
patent: 6770142 (2004-08-01), Estelle

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