Canon Finetech Inc.

Janome Sewing Machine Company Limited

Shingo Takada

Koji Terasawa

Kenichiro Hiruma

Michitaka Fukuda

Hideyuki Kitajima

A detection unit for detecting a data row of a press position and a load at the press position; an input/storage unit for inputting and storing a value serving as a reference for determining a bend point in a relation between the press position and the load at the press position; a data-row calculation unit for calculating a data row of a press position and a load at a constant distance interval based on the data row of the press position and the load detected; a slope calculation unit for calculating a slope of the load based on the press position and the load at the press position detected; and a bend-point determination unit for determining a point, at which the calculated slope of the load exceeds the value serving as the reference for determining the bend point, as the bend point are provided.

Electric press, bend-point detection method, and program

The objective of the present invention is to provide an ejection detection device with an inexpensive and simple structure that can appropriately detect conditions of nozzles, without the control of the quantity of liquid ejected from the nozzles being required. Therefore, for the ejection detection device of the present invention, a light-emitting unit emits light to a light-receiving unit in a direction in which a plurality of nozzles is arranged in a print head. The ejection detection device detects the condition of a nozzle to be detected, which ejects the liquid droplet. At this time, the emission intensity of the light-emitting unit or the responsivity of the light-receiving unit is controlled by the print head in accordance with the location of the nozzle to be detected.

Ejection detection device, ejection detection method, and printing apparatus

An image forming device capable of detecting the presence/absence of ink as well as whether an ink tank is mounted. A detachable ink tank on a carriage includes a prism C, and a reflective optical sensor detects the presence/absence of ink depending on the difference in refractive index between the two states, that is, filled with ink and empty. A reflector lever movable in response to the ink tank being mounted or not, is provided on the bottom of an ink tank holder The reflector lever has one end fixed on a lower part of the ink tank and the other end that is a free end consisting of a triangular reflector D. The reflector lever is normally urged upward by a resilient member A, and it will not direct the reflection toward the sensor in the absence of the ink tank whereas it is deformed in the presence/absence of the ink tank to direct the reflection toward the sensor As a result, the presence/absence of the ink tank is detected.

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Tokyo, Japan

Shingo Takada