Ink jet type image recording apparatus having ink purging and fl

Details Ink jet type image recording apparatus having ink purging and fl Ink jet type image recording apparatus having ink purging and fl

1996-03-04

1998-12-08

Wong, Peter S.

Incremental printing of symbolic information

Ink jet

Ejector mechanism

347 33, 347 30, B41J 2165

Patent

active

058477268

ABSTRACT:
An ink jet printer having a print head and connected to a host computer from which imaging data is transmitted to the printer. The printer has a purging mechanism for purging the print head. The host computer has a clock driven by a storage battery or an uninterruptible power supply. The host computer computes a period as a second period by subtracting a completion timing of the latest purging operation from a present time provided by the clock. The ink jet printer stores a first period starting at an electrical power supply timing with respect to the printer or at the operation timing of the purging mechanism after the electrical power supply. If no purging operation has been performed after the electrical power supply, the second period is compared with a predetermined period. If the second period is longer than the predetermined period, purging operation is performed. If purging operation has been performed after the electrical power supply, the first period is compared with the predetermined period. If the first period is longer than the predetermined period, the purging operation is again performed.

REFERENCES:
patent: 5341163 (1994-08-01), Hanabusa
patent: 5530461 (1996-06-01), Sakuma
patent: 5565898 (1996-10-01), Sakuma
patent: 5572242 (1996-11-01), Fuji et al.

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