| 摘要 |
1,233,583. Selective printing. AMERICAN CYANAMID CO. 26 July, 1968 [23 Aug., 1967], No. 35891/68. Heading B6F. [Also in Divisions G4-G6] Printing photoluminescent compounds in selected positions.-A process of recording information comprises depositing code marks in several designated marking areas 1-16, the required symbol being represented by a variety of photoluminescent compounds which luminesce differently under ultraviolet radiation. The code for each symbol consisting of the varying combinations of the compounds and blank spots are distributed over the same number of marking areas as there are coding components. No marking area contains compounds of the same luminesce characteristics and where a single marking area has more than one kind of compound deposited in it this represents parts of separate symbols. Printing by jets of ink.-As shown in Fig. 2 a code symbol is represented by luminescent ink from jet orifices 33-38 each having a different ink α, #, &c. which are deposited in various combinations in response to signals. The jets are arranged at an angle to one another so deposits of different inks do not overlap. Printing by hammers.-As in Fig. 1, not shown hammers (21-26) strike and deposit ink in the requisite spaces. Operation; dual function of typewriter.-The symbols may be deposited as a result of incoming signals or from electrical contacts on the machine. The typewriter may at the same time type normal visual characters. Sensing.-The recorded information may be optically read by lenses 45-50, Fig. 4, in openings 39-44 arranged spacially in the same manner and sequence as the printing elements in Fig. 2. Filters 51-56 pass the light bands corresponding to the photoluminescent radiation from the inks α, #, &c. At the back of the filters detectors, or light pipes to more distant spread apart detectors are fitted. In a modification Fig. 5 not shown all the components may be read through one lens and barrel. The capacity of the process may be increased by making the detectors sensitive to different concentrations of the inks. Details of the inks are given. |
