Abstract: Equipment (100) for coating photographic media (14), such as photographic film and paper, has an apparatus (10) for printing bar code indicia (12) on a moving photographic media and a printer means for printing human readable indicia (16) on the media. The printer (20a, 20b) moves into print position along a lateral edge (28) of the media (14) in response to input signals received from a controller (22) having computer readable medium for directing the printing and movements of the printer (20a, 20b).

Abstract: An apparatus (10) and method for reading bar codes (12) on a moving web (14) has a LED light source (16) that transmits a beam of light (18o) through the advancing web (14). A scanner (20) is arranged on a side of the web (14) opposite the light source (16) for detecting the characteristic light intensity levels corresponding to various optical densities of the web (14). Output signals from the scanner (20) are processed and manipulated for adjusting the light intensity levels of the light source (16) to within predetermined limits.

Abstract: An ink composition that is useful in ink jet printing contains a polymeric binder and a dye dissolved in a liquid medium containing water, certain organic liquids which function as a solvent for the binder and the dye, and certain other organic liquids which function as evaporation retardants. The ink composition is environmentally safe, has excellent shelf life, and exhibits excellent physical and chemical properties for use in ink jet printers.

Abstract: An emergency signalling unit which is designed to be carried on the person of a fireman or other worker to alert control personnel should the worker become endangered, and an alarm system which incorporates a plurality of such signalling units, each one worn by a different fireman, for providing an alarm at a central station and an indication of which fireman is in trouble, as well as a means of locating him. The emergency signalling unit includes a radio transmitter, a high intensity strobe lamp, and an audio frequency generator. The alarm system includes a plurality of the above-mentioned radio transmitters, each transmitting on a different carrier frequency, and a receiver at a central control station exterior to the burning building, which is equipped to identify the respective carrier signals and to provide a visual indication of which fireman is in trouble as well as an audible signal to alert control personnel to the existence of an alarm condition.