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Multipass Print Technique Using Multiple Printer Tables Disclosure Number: IPCOM000039785D
Original Publication Date: 1987-Aug-01
Included in the Prior Art Database: 2005-Feb-01

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Heath, AW [+details]


A method is described to print complex documents requiring printwheel changes (equation printing). Equation printing has long been a problem when the printer has a limited character set. The problem can be summarized by recognizing that printers employing "daisy wheel technology" typically have 96 fully-formed characters which can be printed at any given time. Some accented vowels can be constructed yielding more that 96 actual characters, but for equation printing involving Greek symbols and readable text, the job will typically require two print wheels. The operator is often prompted to change print wheels many times during the printing of a single page, or the printer may not be able to prompt/stop at all, and the operator has no way to change print wheels mid job.