Method and apparatus for producing aligned cholesteric liquid cr

Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor

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156269, 156324, 1563296, 156529, 264140, 264144, 264435, 264442, 264300, 4251742, 4251748R, 425223, 425315, 425446, B29C 7100, B29D 900

Patent

active

055994121

ABSTRACT:
In color printing, and in the fine arts, cholesteric liquid crystal (CLC) color inks are known to possess much higher color saturation and brightness than conventional pigment and dyed based inks. However, prior art CLC ink formulations are inconvenient because in the liquid phase they have to be confined in cells, and in the solid phase, they have to be applied at high temperature, and have to be aligned by some means to produce the optimum color. This invention solves the problem encountered in the CLC prior art, by making pre-aligned CLC platelets or flakes of appropriate thickness and size and mixing them in appropriate host fluids producing a novel CLC ink which can be applied at room temperature and without the need for alignment. The new pre-aligned room temperature CLC ink can be used as a substitute for conventional inks in almost all printing and plotting, and manual drawing and painting. Using the notch filter CLC platelets, the brightness is further enhanced. This invention teaches the CLC ink concepts, its applications and method of manufacturing.

REFERENCES:
patent: 3277519 (1966-10-01), Jones
patent: 3789225 (1974-01-01), Leder
patent: 4394498 (1983-07-01), Kastelic
patent: 4707080 (1987-11-01), Fergason
patent: 4859360 (1989-08-01), Suzuki et al.
patent: 5073219 (1991-12-01), McArdle et al.
patent: 5198148 (1993-03-01), Nakano
patent: 5227115 (1993-07-01), Harnischfeger

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