Optical: systems and elements – Lens – With support
Reexamination Certificate
2006-04-18
2006-04-18
Schwartz, Jordan M. (Department: 2873)
Optical: systems and elements
Lens
With support
C359S611000, C359S827000
Reexamination Certificate
active
07031081
ABSTRACT:
An optical filters quick assembly support system or a “Matte Box” as it is known in the film industry, supporting plurality of no-tool, quick-change, snap-on, independently 360°-rotating filter-holder stages, allowing freedom of operation in the horizontal, vertical and rotational planes. A mount base ring having an internal circular coupling slot at one face for attaching the desired number of filter-holder stages serves as an initial receiving unit. The same mount ring having two slidable and lockable brackets for connecting a sunshade in an adjustable manner, assembled to it. Filter-holder stages consisting of a ring having the same internal circular coupling slot as the mount base ring at one face and one stationary and one spring-loaded filter-holder guide attached to the opposite face. The filter-holder guides having a corresponding to the coupling slot semi-circular sliding ribs for coupling with the mount base ring or any additional filter-holder stage.
REFERENCES:
patent: 4687312 (1987-08-01), Navarro
patent: 4901098 (1990-02-01), Salles
patent: 5349411 (1994-09-01), Beauviala
Schwartz Jordan M.
Stultz Jessica
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