Abstract:
An inkjet head includes a back end part, a front end part, and a heating plate. The back end part includes an ink passage. The back end part is fed with ink and delivers the fed ink. The front end part is supplied with ink from the back end part. The front end part includes nozzles. The heating plate includes a heating element to produce heat by electricity. The heating plate is disposed between the back end part and the front end part. The heating plate conducts heat from the other side of plane so as to heat the front end part. The heating plate conducts heat from one side of plane so as to heat the back end part.
Abstract:
Provided is an ink-jet head including: a back end portion; a front end portion which ejects the ink; a heating plate which is arranged between the back end portion and the front end portion, and which heats the back end portion and the front end portion; and a temperature detection device which is provided on the heating plate, and which outputs a value in accordance with a temperature of the front end portion, the temperature detection device being held in direct contact with the front end portion.
Abstract:
An abnormality detection device for an image forming apparatus detects an abnormality in the image forming apparatus which includes a heating belt looped around a heating roller and a fixing roller. The abnormality detection device for an image forming apparatus includes: thermistors for detecting temperatures of one widthwise end portion and the other widthwise end portion of the heating belt; a temperature difference detection section for determining whether or not a temperature difference between the temperature of the one end portion and the temperature of the other end portion which are detected by the thermistors is greater than a predetermined value; and a judgment section for judging that an abnormality has occurred in the image forming apparatus when it is determined in the temperature difference detection section that the temperature difference is greater than the predetermined value.
Abstract:
An image forming apparatus has a power supply portion, an operation panel, a document set portion, a plurality of sensing portions including a document set sensing portion that outputs a document set signal at a first level if the document is set, and control portions. The control portions, at transition to the power saving mode, stores flag data if the document set signal is at the first level, and when the level of any of the status signals from the plurality of sensing portions changes while in the power saving mode, even if the level of the document set signal is the first level, if the flag data is stored, the control portion maintains the electric power supply to the operation panel as the electric power supply expected in the power saving mode.
Abstract:
An ink heating device (7) includes a heater circuit (91) including a heater (71) which heats ink and an auto-return type bimetal switch (92) which is provided between the heater (71) and a power source (A); a relay (5) provided between the bimetal switch (92) and the power source (A); and a controller (4) which opens or closes the relay (5) according to a state of the heater circuit (91).