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Dual Quality Print Matrix Printer Disclosure Number: IPCOM000055560D
Original Publication Date: 1980-Aug-01
Included in the Prior Art Database: 2005-Feb-13

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Humphreys, FR Lisinski, JE Rex, DK [+details]


A tilting print head, such as the type disclosed in IBM Technical Disclosure Bulletin 20,5097 (May 1978), provides the ability to print a high quality character, such as shown in Fig. 1, by printing a series of dots in a normal fashion on s first pass across a record medium. Thereafter, the print head is tilted an amount so that dots are printed in the vertical alignment between the previously printed dots on a reverse pass back across the same line of the record medium. In addition, the speed of the print head is slowed down by approximately one-half so that the horizontal spacing between dots is overlapping. In this manner, a character of much higher quality is obtained than the conventional characters, such as shown in Fig. 2, for wire matrix printers.