Wire wound applicator for developing fluid on a lithographic...

Details Wire wound applicator for developing fluid on a lithographic... Wire wound applicator for developing fluid on a lithographic...

2005-06-14

2005-06-14

Rutledge, D. (Department: 2851)

Photography

Fluid-treating apparatus

Dark cabinet

C396S604000, C396S606000, C396S626000, C355S027000

Reexamination Certificate

active

06905266

ABSTRACT:
The invention relates to the application of a uniform film of a fluid to the surface of a flat workpiece as it is being conveyed through a workstation. The invention is specifically directed to the development of lithographic printing plates and comprises the application of the thin film of developer solution to each plate in a controlled manner using a wire-wound coating device and a unique manner of metering and feeding fresh fluid to the wire-wound device. Specifically, the fluid is gently fed onto the wire-wound device by simple volumetric displacement and overflow from the inside of a hollow tube onto the wire and the flow is controlled by sensing the beginning and end of each workpiece or plate. The hollow tube may be the wire-wound component or it may be a tube mounted above the wire-wound component. The spent developer is rinsed and sent to waste. According to the invention, only fresh developer solution is applied at a uniform film thickness, thereby achieving uniform image development.

REFERENCES:
patent: 4737810 (1988-04-01), Kobayashi et al.
patent: 5210005 (1993-05-01), Takekoshi et al.
patent: 5984539 (1999-11-01), Patton et al.
patent: 6423138 (2002-07-01), Piccinino et al.
patent: 2 163 151 (1973-05-01), None

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