摘要:
A liquid detecting container includes a cartridge case having a sending passage for sending out liquid, buffer chambers by the end of the sending passage, and a sensor unit disposed facing the buffer chambers. A sensor chip in the sensor unit includes a sensor cavity communicating with the buffer chambers, a vibration plate closing an opening side of the sensor cavity opposite to the side communicating with the buffer chambers, and a piezoelectric element disposed on the surface of the vibration plate opposite to the surface facing the sensor cavity; emits a vibration wave to the sensor cavity and the buffer chambers through the vibration plate, receives a reflected wave from the buffer chambers through the vibration plate, and then converts the reflected wave into an electrical signal. The compliance values of the buffer chambers are set ten times greater than the compliance value of the sensor cavity.
摘要:
A liquid detecting method of detecting liquid in a liquid container used on a liquid ejector by use of a liquid sensor. There are included a head cleaning step of performing a head cleaning operation after maintaining for a predetermined time or longer a state there is no flow of fluid into/from the cavity through the liquid supply port and liquid discharge port, and a detecting step of detecting a presence/absence of liquid by applying a drive signal to the piezoelectric device of the liquid sensor after the head cleaning process.
摘要:
A liquid detection device that is accommodated in a sensor accommodating portion formed in a liquid container containing a liquid therein and detects the liquid in the liquid container using a piezoelectric element, wherein, when a wavelength of a vibration wave to be emitted from the piezoelectric element is λ, a distance H from a rear surface of a vibration wave emitting surface of the piezoelectric element to a wall surface facing the rear surface is represented by Equation 1. (n×λ/2−λ/4−λ/8)≦H≦(n×λ/2−λ/4+λ/8) (Equation 1) (where n=1, 2, 3, . . . )
摘要:
A liquid detecting method of detecting liquid in a liquid container used on a liquid ejector by use of a liquid sensor. There are included a head cleaning step of performing a head cleaning operation after maintaining for a predetermined time or longer a state there is no flow of fluid into/from the cavity through the liquid supply port and liquid discharge port, and a detecting step of detecting a presence/absence of liquid by applying a drive signal to the piezoelectric device of the liquid sensor after the head cleaning process.
摘要:
The invention relates to a liquid sensor which can certainly judge the existence of liquid, and a liquid container including the sensor. A liquid sensor 60 in which a piezoelectric element having a piezoelectric layer 47 on both surfaces of which electrodes 46 and 49 are formed is used, and a bottom 43a of a cavity 43 for receiving liquid as a detection object is vibrated. The sensor 60 includes a vibration cavity forming base portion 40 in which the cavity 43 having the vibratable bottom 43a is formed, and a flow path forming base portion 50 laminated on the vibration cavity forming base portion 40. A liquid supply path 53 for supplying the liquid as the detection object to the cavity 43 and a liquid discharge path 54 for discharging the liquid as the detection object from the cavity 43 are formed in the flow path forming base portion 50.
摘要:
A resonance pulse is a voltage waveform substantially containing an expansion element for varying a voltage to expand a pressure chamber, an expansion sustaining element generated following with the expansion element, and sustaining a maximum voltage at a predetermined value, and a contraction element generated following with the expansion sustaining element, and varying the voltage to contract the pressure chamber. A time span from a front end of the expansion element to a front end of the contraction element is set as ½ of an inherent vibration cycle of ink in the pressure chamber.
摘要:
Provided is a liquid ejecting head, a liquid ejecting head unit, and a liquid ejecting apparatus are provided that can secure sufficient compliance in a manifold and prevent degradation in liquid dispensing characteristic. In the liquid ejecting head, a flow path plate including pressure chambers arranged in a row, a manifold plate including a manifold communicating with the pressure chambers, thus constituting a common liquid chamber, a compliance plate that seals the manifold, and a nozzle plate including a nozzle orifice communicating with the pressure chamber so as to eject a liquid, are stacked in this order. The compliance plate includes a flexible compliance portion formed in a region opposing the manifold, and the nozzle plate includes a through hole formed in a region opposing the compliance portion.
摘要:
The present invention relates to a use of Chinese medicine composition in preparation of medicine for secondary prevention of myocardial infarction. Said Chinese medicine composition is prepared from a formula comprising the crude drugs by the following weight percentages: Radix Astragali 22.2%˜66.8%, Radix Salviae Miltiorrhizae 11.6%˜33.4%, Radix Notoginseng 2.5%˜13.5%, and Lignum Dalbergiae Odoriferae 14.5%˜44.3%.
摘要:
An ejection pulse DP sequentially and continuously includes an expansion phase p1 where a voltage changes so as to cause a pressure chamber to expand, an expansion hold phase p2 where a potential at an end edge of the expansion phase is maintained for a predetermined time, a contraction phase where the voltage changes so as to cause the pressure chamber to contract, and a time t1 between a start edge and the end edge of the expansion phase and a time t2 between a start edge and an end edge of the contraction phase are specified in the following range, respectively: Tc/3≦t1≦Tc (A) Tc/3≦t2≦Tc (B).
摘要:
A liquid discharge apparatus includes a nozzle, a pressure chamber and a liquid supply portion that supplies the liquid to the pressure chamber. A discharge pulse generating unit generates a discharge pulse to discharge the liquid. The viscosity of the liquid is no less than 8 millipascal-seconds. The nozzle has a first portion with a discharge side that has an opening area smaller than that of a pressure chamber side and a second portion that communicates with an end portion of the discharge side. An opening area of the second portion is no greater than 1/9 of the opening area of the pressure chamber side. The discharge pulse has a decompression portion that decompresses the liquid to lead a meniscus in the second portion to the first portion and a compression portion that compresses the liquid to discharge the liquid before the meniscus returns to the second portion.