INKJET PRINTING APPARATUS

摘要

When one of first to third power supply circuits breaks down, a change-over switch performs switching of electrical connection such that drive voltage is allowed to be supplied from normal one of the first to third power supply circuits also to one of the inkjet heads connected to the breakdown power supply circuit. Consequently, the power supply circuits are partially sharable with a plurality of inkjet heads, causing no necessity of stopping the apparatus for replacing one breakdown power supply circuit. As a result, suppression in decrease of throughput of the apparatus is obtainable.

主权项

1. An inkjet printing apparatus for performing printing to a printing sheet through discharging ink droplets, the apparatus comprising:
at least three inkjet heads capable of discharging the ink droplets to the printing sheet simultaneously in response to inputted electric signals, and arranged orthogonal to a transport direction of the printing sheet; at least three power supply circuits configured to supply drive voltage to the inkjet heads respectively; and a change-over switch disposed between the inkjet heads and the power supply circuits and electrically connecting the power supply circuits to the inkjet heads respectively, and, when one of the power supply circuits breaks down, switching electrical connection such that the drive voltage is allowed to be supplied to the inkjet heads by electrically connecting the power supply circuits other than the breakdown power supply circuit to one of the inkjet heads corresponding to the breakdown power supply circuit.