Browse Prior Art Database

Degraded Printer Operation

IP.com Disclosure Number: IPCOM000069887D
Original Publication Date: 1978-Jul-01
Included in the Prior Art Database: 2005-Feb-21

Publishing Venue

IBM

Related People

Authors:
Waddell, JM [+details]

Abstract

An ink jet printer includes a paper-carrying drum which receives paper to be printed upon from a paper source and supplies same to an output. A computerized control operates the motor M for rotating the paper drum at an appropriate rotational speed. An ink jet carriage traverses the axial length of the print area of the drum and carries an array of ink jet nozzles for printing graphics on the paper. Under certain situations, malfunctions can occur within the machine wherein printing quality can be substantially reduced. For example, the control may have a diagnostic procedure for printing errors out on the paper via the paper drum. To ensure accuracy, less than all of the nozzles in the array end are used to print the diagnostic report.