US 11,112,720 B2 · Technique for transmitting signal indicating abnormality in image forming apparatus

Abstract

An image forming unit forms an image on a sheet. A first generation circuit generates, regarding a member involved in image formation in the image forming unit, a first signal relating to a first abnormality. A second generation circuit generates, regarding the member, a second signal that relates to a second abnormality different from the first abnormality, and whose feature in a time axis direction or a frequency axis direction is different from that of the first signal. A control circuit has a single port to which the first signal and the second signal are to be input. The control circuit identifies between the first signal and the second signal based on a feature of a signal input to the port.

Claims20

Dependent claims

An image forming apparatus comprising:

an image forming unit that forms an image on a sheet;
a first generation circuit that generates, regarding a member involved in image formation in the image forming unit, a first signal relating to a first abnormality;
a second generation circuit that generates, regarding the member, a second signal that relates to a second abnormality different from the first abnormality, and whose feature in a time axis direction or a frequency axis direction is different from that of the first signal;
and
a control circuit having a single port to which the first signal and the second signal are to be input,
wherein the control circuit is configured to identify between the first signal and the second signal based on a feature of a signal input to the port.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application

16/928,272Filed 14 Jul 2020

Priority

JP JP2019-13707925 Jul 2019

Published

US 2021/0026270 A128 Jan 2021

Granted

7 Sep 2021

Term ends

Not estimatedThe source records don’t support an estimate.

Classification6 codes

G03G 15/0258
For laying down a uniform charge, e.g. for sensitising; Corona discharge devices: provided with means for the maintenance of the charging…
G03G 15/5004
Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode…:…
G03G 15/0291
For laying down a uniform charge, e.g. for sensitising; Corona discharge devices: corona discharge devices, e.g. wires, pointed electrodes, means…
G03G 15/55
Apparatus for electrographic processes using a charge pattern: self-diagnostics; Malfunction or lifetime display

Technique for transmitting signal indicating abnormality in image forming apparatus

Life of this patent

Technique for transmitting signal indicating abnormality in image forming apparatus

Life of this patent

Abstract

Claims20