Retroreflective prism arrays with formed air spheres therein

Details Retroreflective prism arrays with formed air spheres therein Retroreflective prism arrays with formed air spheres therein

1995-05-19

1997-01-07

Phan, James

Optical: systems and elements

Signal reflector

3-corner retroreflective

359519, 359530, 156242, 156324, 428913, 264214, G02B 5124

Patent

active

055923305

ABSTRACT:
A method and apparatus for forming retroreflective sheeting with improved daytime whiteness performance is described in which air spheres are encapsulated into the prism structure when the prism base body is laminated to the prisms in a mold.

REFERENCES:
patent: 3124639 (1964-03-01), Kahn
patent: 3689346 (1972-09-01), Rowland
patent: 3772128 (1973-11-01), Kahn et al.
patent: 3829680 (1974-08-01), Jones
patent: 3935359 (1976-01-01), Rowland
patent: 3945722 (1976-03-01), Prueitt
patent: 4572622 (1986-02-01), Sterner
patent: 4701772 (1987-10-01), Anderson et al.
patent: 4796160 (1989-01-01), Kahn
patent: 5485311 (1996-01-01), McAllister

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