Fusable life indicator and identification device for an electrop

Details Fusable life indicator and identification device for an electrop Fusable life indicator and identification device for an electrop

1996-09-23

1998-05-26

Ramirez, Nestor R.

Electrophotography

Diagnostics

Consumable

399 27, G03G 2100

Patent

active

057582246

ABSTRACT:
A consumable product such as a toner cartridge for a laser printer includes a messaging device connected thereto. The messaging device is adapted to receive a control signal from the printer or other host, the control signal being indicative of a use status for the consumable product, such as "toner low". The control signal produces a visual effect upon the messaging device such that a message or a change in message concerning the consumable product is indicated thereby. The message or change in message is, alternatively, indicative of an identifier for the consumable product. The messaging device is a resistive heater substrate having at least one layer of thermochromatic ink disposed thereon. In an alternate embodiment, the message or change in message is effected by a change in temperature upon the messaging device, rather than by a direct control signal. In another alternate embodiment, a fuse is connected to the messaging device for providing further information to the printer system.

REFERENCES:
patent: 5202677 (1993-04-01), Parker et al.

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