US PATENT SUBCLASS 242 / 348.4
.~.~.~ Light occludent

Current as of: June, 1999
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242 /   HD   WINDING, TENSIONING, OR GUIDING

324  DF  UNWINDING AND REWINDING A MACHINE CONVERTIBLE INFORMATION CARRIER (E.G., MAGNETIC TAPE OR PHOTOGRAPHIC FILM) {13}
335  DF  .~ Cartridge system (i.e., cartridge work station or cartridge) {7}
348  DF  .~.~ Single coil cartridge (e.g., film magazine) {4}
348.4.~.~.~ Light occludent

DEFINITION

Classification: 242/348.4

Light occludent:

(under subclass 348) Subject matter wherein the cartridge is constructed in a particular manner to exclude unwanted light

into the cartridge interior, typically to avoid light exposure on photosensitive film.

SEE OR SEARCH THIS CLASS, SUBCLASS:

588.5, for light occludent structure in a coil holder.

SEE OR SEARCH CLASS

396, Photography, particularly

511+, and 589+ for light occludent structure in a camera or fluid treatment environment.