| 摘要 |
<p>1,021,909. Selective printing. INTERNATIONAL BUSINESS MACHINES CORPORATION. Jan. 28, 1965 [Feb. 20, 1964], No. 3734/65. Heading B6F. [Also in Divisions B3 and B4] Documents 2 of paper, metal or ceramic are fed sequentially to a printing station 4 at which ink spots are selectively applied by means of electrodes 5 located near an electrically earthed rotating drum 6 immersed in a tank 7 containing ink, the electrodes being selectively energized with a voltage of about 3,000 volts by means of a keyboard 10. The documents are then fed to an error sensing station 13 connected to comparing means 15 where, for example, the keyed information stored in means 10a is compared with printed information sensed at the station 13. Following station 13, the documents are fed through a path 3c which overturns the documents as they are fed into an error correction station 17 at which the rear surface of the document is presented for spot printing to a row of electrodes 5a similar to electrodes 5. For each error sensed, a corresponding spot will be printed. From station 17, the documents are conveyed to a printing station 18 comprising 80 injection lasers 19 controlled by a power supply 21. Alternatively, a single laser source may be employed in combination with a deflection system.</p> |
