Retroreflective articles having microcubes, and tools and methods for forming microcubes - Patent Review 6015214

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Retroreflective articles having microcubes, and tools and methods for forming microcubes
United States Patent	6015214
Link to this page	http://www.wikipatents.com/6015214.html
Inventor(s)	Heenan; Sidney A. (Park Ridge, IL), Montalbano; Anthony J. (Barrington, IL), Coman; Liviu A. (Des Plaines, IL), Couzin; Dennis I. (Evanston, IL)
Abstract	A method for tooling a pattern of retroreflective microcubes, which pattern can be subdivided into smaller increments within which there are straight line tooling paths, none of which pass through an otherwise solid part of the incremental pattern. The tooling paths within the various increments need not be parallel to a common plane. Various adaptions of the method enable the tooling of a number of specific microcube shapes and for modifying such optical properties of the microcubes as entrance angularity, incidence angularity, orientation angularity, observation angularity, percent active aperture and retroreflectance. Specific techniques govern the pre-selection of cube parameters such as cube axis cant, cube apex decentration, and cube boundary proportions, which parameters can be adjusted independently of each other. Designs tooled by the method can have 100% active aperture at near zero degrees entrance angle. The method involves providing a plurality of plates of micro thickness, each plate having at least one end comprised of a material that can be tooled with polished surfaces by means of an appropriate tool, tooling on said end of each plate an increment of the pattern, and assembling the plates together in various ways to form a master. Retroreflective articles made by means of this technique are expected to provide superior performance when used in pavement markers, highway signs and other applications.

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Reference	Relevancy	Comments	Reference	Relevancy	Comments
5600484 Benson et al. Feb,1997	Your vote accepted [0 after 0 votes]		5122902 Benson Jun,1992	Your vote accepted [0 after 0 votes]
4938563 Nelson et al. Jul,1990	Your vote accepted [0 after 0 votes]		4895428 Nelson et al. Jan,1990	Your vote accepted [0 after 0 votes]
4833285 Okamoto et al. May,1989	Your vote accepted [0 after 0 votes]		4775219 Appledorn et al. Oct,1988	Your vote accepted [0 after 0 votes]
4633567 Montalbano Jan,1987	Your vote accepted [0 after 0 votes]		4588258 Hoopman May,1986	Your vote accepted [0 after 0 votes]
4486363 Pricone Dec,1984	Your vote accepted [0 after 0 votes]		4478769 Pricone et al. Oct,1984	Your vote accepted [0 after 0 votes]
4460449 Montalbano Jul,1984	Your vote accepted [0 after 0 votes]		4349598 White Sep,1982	Your vote accepted [0 after 0 votes]
4332847 Rowland Jun,1982	Your vote accepted [0 after 0 votes]		4244683 Rowland Jan,1981	Your vote accepted [0 after 0 votes]
4208090 Heenan Jun,1980	Your vote accepted [0 after 0 votes]		4095773 Lindner Jun,1978	Your vote accepted [0 after 0 votes]
4080280 Heasley Mar,1978	Your vote accepted [0 after 0 votes]		4073568 Heasley Feb,1978	Your vote accepted [0 after 0 votes]
4076383 Heasley Feb,1978	Your vote accepted [0 after 0 votes]		4066331 Lindner Jan,1978	Your vote accepted [0 after 0 votes]
3923378 Heenan Dec,1975	Your vote accepted [0 after 0 votes]		3922065 Schultz Nov,1975	Your vote accepted [0 after 0 votes]
3873184 Heenan Mar,1975	Your vote accepted [0 after 0 votes]		3833285 Heenan Sep,1974	Your vote accepted [0 after 0 votes]
3834789 Brudy Sep,1974	Your vote accepted [0 after 0 votes]		3830682 Rowland Aug,1974	Your vote accepted [0 after 0 votes]
3712706 Stamm Jan,1973	Your vote accepted [0 after 0 votes]		3689346 Rowland Sep,1972	Your vote accepted [0 after 0 votes]
3684348 Rowland Aug,1972	Your vote accepted [0 after 0 votes]		3541606 Heenan et al. Nov,1970	Your vote accepted [0 after 0 votes]
3417959 Schultz Dec,1968	Your vote accepted [0 after 0 votes]		3332327 Heenan Jul,1967	Your vote accepted [0 after 0 votes]
3069721 Arni et al. Dec,1962	Your vote accepted [0 after 0 votes]		2310790 Jungersen Feb,1943	Your vote accepted [0 after 0 votes]
2055298 Leray Sep,1936	Your vote accepted [0 after 0 votes]		1925096 Hunter Aug,1933	Your vote accepted [0 after 0 votes]
1591572 Stimson Jul,1926	Your vote accepted [0 after 0 votes]
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