Waste liquid quantity detecting method, waste liquid...

Details Waste liquid quantity detecting method, waste liquid... Waste liquid quantity detecting method, waste liquid...

2007-10-23

2007-10-23

Luu, Matthew (Department: 2861)

Incremental printing of symbolic information

Ink jet

Controller

C347S019000, C347S036000

Reexamination Certificate

active

10870502

ABSTRACT:
A device detects a quantity of waste liquid without using a special sensor by subtracting total use of liquid from total consumption of liquid and regarding the differential as the quantity of waste liquid. The device includes a first unit for accumulating liquid consumption for a period from the start of using a liquid container up to the present to obtain and store total consumption, a second unit for accumulating liquid quantity used for the operation by the operation unit for the period to obtain and store total use, a third unit for subtracting the total use from the total consumption to obtain the waste liquid quantity, a fourth unit for comparing the obtained waste liquid quantity with a predetermined upper limit on waste liquid quantity, and a fifth unit for informing that the waste liquid quantity exceeds the upper limit.

REFERENCES:
patent: 2002/0118236 (2002-08-01), Uetsuki
patent: 2003/0058297 (2003-03-01), Saruta
patent: 2755791 (1998-03-01), None

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