Ink jet printer having exchangeable recording devices, a recover

Details Ink jet printer having exchangeable recording devices, a recover Ink jet printer having exchangeable recording devices, a recover

1996-02-21

1999-09-07

Nguyen, Matthew

Incremental printing of symbolic information

Ink jet

Ejector mechanism

347 86, B41J 2165

Patent

active

059494476

ABSTRACT:
An ink jet printing apparatus capable of exchangeably mounting a plurality of kinds of recording devices provided with discharging devices for discharging ink. The apparatus includes a recovery operation device for effecting a recovery operation for recovering a discharge condition of a recording head to be mounted to the apparatus, a timer for clocking an elapsed time from a predetermined operation, a discriminating device for discriminating a recording device to be mounted, a memory for memorizing data recording an elapsed time from a previous recovery operation for each of the plurality of kinds of recording devices, a calculating device for calculating an elapsed time of the recording device to be mounted from a previous recovery operation, based on an elapsed time clocked by the timer and data stored in the memory, a switch for switching between an operation state and a non-operation state of the apparatus, a back-up device for backing up the timer and the memory, even when the apparatus is not in operation, the back-up device also backing up the timer and the memory for a recording device, of the plurality of kinds of recording devices, not mounted to the apparatus, and a recovery control device for controlling the recovery operation by the recovery operation device by comparing the elapsed time from the previous recovery operation with a predetermined reference time for the recording device to be mounted.

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Abstract of Japanese Laid-Open Patent Application No. 04-250064, Jan. 1991.

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