Device for intermittent application of liquids such as adhesive

Details Device for intermittent application of liquids such as adhesive Device for intermittent application of liquids such as adhesive

1986-12-04

1988-05-17

McIntosh, John P.

Coating apparatus

Immersion or work-confined pool type

Work-confined pool

118704, B05C 502

Patent

active

047443308

ABSTRACT:
A device for intermittent application of liquids such as adhesive, in particular hot-melt adhesive, to material moved relatively to the device, comprises a reservoir for the liquid, an application nozzle which is preferably formed as slit nozzle or a plurality of adjacent application passages, a supply line from the reservoir to the nozzle, a needle valve provided shortly upstream from the nozzle, a means for interrupting the flow from the reservoir to the nozzle at desired intervals, a return line to the reservoir connected to the supply line upstream from the main valve and a second needle valve for shutting off the return line. The second needle valve is larger than the main valve and lies as preliminary valve in the supply line a small distance upstream from the main valve; both valves are controllable in adjustable time relationship with respect to each other.

REFERENCES:
patent: 3126574 (1964-03-01), Fox
patent: 4535719 (1985-08-01), Regan

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