Weather resistant signage and a process for fabrication thereof

Details Weather resistant signage and a process for fabrication thereof Weather resistant signage and a process for fabrication thereof

1998-09-21

2000-11-21

Hilten, John S.

Printing

Stenciling

Processes

40584, B41M 112, C09F 700

Patent

active

061487236

ABSTRACT:
A process of fabricating weather resistant signage by screen printing indicia on a UV-treated impregnated polyester protective film using a Cellosolve acetate-based ink. The resulting sign is extremely resistant to solar UV, thus preserving the indicia brightness and clarity for a very long period of time even under the most extreme conditions. The screen printing process of the preferred embodiment comprises the steps of first preparing a film image, then preparing a fabric mesh ranging from 125 to 230 mesh for black and white images and ranging from 355 to 425 mesh for halftone color images. The fabric mesh is attached to a stencil and the film image is attached to the stencil. The combination is placed into a vacuum frame for exposure to high intensity light, after which the stencil is washed with pressurized water, dried by fan, taped and touched up for pinholes or other blemishes. The ink used in the preferred embodiment comprises a clear base having Cellosolve acetate, SC-150 aromatic solvent, VITEL PE-200, VITEL PE-222 and VITEL PE-307 solvent-based coating resins, as well as thinner and resin and other ingredients. The preferred embodiment of the invention uses a unique substrate for the sign material. Generally, the substrate comprises a UV treated, impregnated polyester protective film.

REFERENCES:
patent: 2779269 (1957-01-01), Hill
patent: 3943105 (1976-03-01), Hermes
patent: 4415607 (1983-11-01), Denes et al.
patent: 4848348 (1989-07-01), Graighead
patent: 5215826 (1993-06-01), Shimanski et al.
patent: 5270507 (1993-12-01), Nakamura et al.
patent: 5854306 (1998-12-01), Mattesky et al.

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