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Realtime Processing of Printer Setup Changes and Sheetfeed Requirements on an Impact Printer with Sheetfeed Attachment

IP.com Disclosure Number: IPCOM000048275D
Original Publication Date: 1982-Jan-01
Included in the Prior Art Database: 2005-Feb-08
Document File: 2 page(s) / 14K

Publishing Venue

IBM

Related People

Daniels, PR: AUTHOR [+3]

Abstract

In an impact printer having text formatting capability and a sheetfeed attachment, an echo capability is provided to notify the text formatter that a previously requested function is now ready for execution. This allows the formatter to initiate a function aind continue processing without regard to the timing of the execution of the requested function. By the use of this echo capability, a function can be requested which requires a knowledge of a particular machine configuration at a point when this knowledge is not available.

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Realtime Processing of Printer Setup Changes and Sheetfeed Requirements on an Impact Printer with Sheetfeed Attachment

In an impact printer having text formatting capability and a sheetfeed attachment, an echo capability is provided to notify the text formatter that a previously requested function is now ready for execution. This allows the formatter to initiate a function aind continue processing without regard to the timing of the execution of the requested function. By the use of this echo capability, a function can be requested which requires a knowledge of a particular machine configuration at a point when this knowledge is not available.

For example, in a text formatting system associated with an impact printer for converting a data stream from a host into direct printer control commands which are subsequentally transmitted to printer control software, the formatter also has the responsibility for formatting sheetfeed and eject commands and for causing the operator to be aware of setup changes, such as a feed type change. These operator intervention signals are posted to the operator via the printer indicators and displays and by an audible alarm.

Formatting of the sheetfeed/eject commands and posting of a paper feed type setup change or a manual load require that the software which performs these functions has knowledge of the feed type mounted on the printer at the time the operation is required. In the case of the feed/eject commands, the feed type must be known so that the correct commands are formatted. In the case of a setup change or manual load, knowledge of the feed type is required so that an intervention is not posted unnecessarily. For example, a host request for tractor feed should be ignored if tractor feed is already mounted. To do otherwise would cause operator annoyance in having to unnecessarily service the printer.

A mechanism is made available in the impact printer whereby the communications attachment system may determine the current paper feed type. This mechanism is the device ID. However, the device ID, if obtained by the text formatter at the time the feed/eject or setup/ manual load requirement is first detected, will describe the printer configuration at a point in time earlier than when the feed/eject or setup/manual load commands are actually required because the formatter is ahead of the printer mechanism in processing the input data stream. This implies that the feed type could be different it the time the commands are issued, thereby causing incorrect commands or unnecessary intervention.

To summarize the problem addressed by this approach, the software subsystem which i...