Coater design for low flowrate coating applications

Details Coater design for low flowrate coating applications Coater design for low flowrate coating applications

1991-07-25

1994-08-02

Jones, W. Gary

Coating apparatus

Immersion or work-confined pool type

Work-confined pool

118410, 118412, 118415, 2395533, 2395903, B05L 318

Patent

active

053342470

ABSTRACT:
There are disclosed coaters that repeatedly and intermittently apply a uniform, thin coating of liquid onto a support at a rate that does not exceed the maximum swell rate of the support. Thus, developer liquid can be applied to photographic paper supports without leaving behind liquid effluent.
The coater features a delivery channel leading from a manifold chamber to a slit orifice, the channel being improved in that it contains a plurality of spaced-apart wall portions connecting the opposed flow surfaces of the delivery channel, that extend in a direction towards the slit orifice, and structure inside the orifice for coalescing the individual streams fed by these wall portions, into a continuous strip of liquid to be dispensed by the slit orifice.

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