摘要:
An ink jet printing apparatus in which the ink jet print head is constructed to eliminate problems caused by air bubbles that can be present in fluid hot-melt ink. The apparatus head includes a heater to melt solid ink or lower the viscosity of high viscosity semi-solid ink and a plurality of ink jet nozzles corresponding to a series of piezoelectic vibrating elements that are positioned so that piezoelectric oscillations propel ink through the nozzles. The vibrators and nozzles are spaced so that if air bubbles are present in the melted ink the bubbles will be induced to travel away from the nozzles by piezoelectrically induced agitation so that they do not interfere with ink jet printing. The printer can include a vent hole to provide an exit for the bubbles. The vent hole can be selectively opened and closed.
摘要:
An ink jet printing apparatus in which the ink jet print head is constructed to eliminate problems caused by air bubbles that can be present in fluid hot-melt ink. The apparatus head includes a heater to melt solid ink or lower the viscosity of high viscosity semi-solid ink and a plurality of ink jet nozzles corresponding to a series of piezoelectric vibrating elements that are positioned so that piezoelectric oscillations propel ink through the nozzles. The vibrators and nozzles are spaced so that if air bubbles are present in the melted ink the bubbles will be induced to travel away from the nozzles by peizoelectrically induced agitation so that they do not interfere with ink jet printing.
摘要:
An ink jet recording apparatus and method having an ink jet head. The ink jet head includes a housing made of a material having a high coefficient of thermal conductivity, including at least one heat source, and arranged so as to confront a recording medium; an ink holding member arranged inside the housing, the ink holding member transmitting heat generated by the heat source to melt a solid-phase ink put into the housing for holding the molten ink by capillary action; a nozzle formed member being part of the ink holding member and having at least one nozzle orifice arranged so as to confront the recording medium; and a pressure generating member arranged within the ink holding member for generating a pressure which causes ink near the nozzle orifice to jet in the form of ink drops. The ink jet recording method is achieved by the apparatus thus constructed.
摘要:
An on-demand type ink jet print head including a drive assembly formed from a vibrating plate formed of a piezoelectric layer with an electrode layer on one surface and an electrically conductive, physically resilient layer on the opposite surface of the piezoelectric layer. The vibrating plate is secured to a base and has two opposing edges defining a free space therebetween. The vibrating plate is slit into a plurality of strips and these strips are cross-slit in the widthwise direction to form a row of reed pieces secured to each opposing edge of the base in a cantilever configuration and extending into the free space from each edge toward the reed pieces extending from the opposite edge with a space therebetween. The reed pieces are electrically and mechanically independent of each other and have negligible electrical and mechanical interference with each other. Selective application of an electric field to the piezoelectric layer causes the reed pieces to deflect and jet ink from the print head onto a recording medium.
摘要:
An ink jet recording apparatus and method having an ink jet head. The ink jet head includes a housing made of a material having a high coefficient of thermal conductivity, including at least one heat source, and arranged so as to confront a recording medium; an ink holding member arranged inside the housing, the ink holding member transmitting heat generated by the heat source to melt a solid-phase ink put into the housing for holding the molten ink by capillary action; a nozzle formed member being part of the ink holding member and having at least one nozzle orifice arranged so as to confront the recording medium; and a pressure generating member arranged within the ink holding member for generating a pressure which causes ink near the nozzle orifice to jet in the form of ink drops. The ink jet recording method is achieved by the apparatus thus constructed.
摘要:
To perform control so as to achieve a transmission power that satisfies a desired communication quality by an access method which a mobile station apparatus uses, in consideration of the frequency-selective diversity effect, when switching an access method to the one having a different frequency-selective diversity effect. In a wireless communication system in which a communication control apparatus and a communication terminal apparatus that are able to use a plurality of types of access methods perform wireless communication using any of the access methods, the communication control apparatus, when the necessity of changing the access method arises, determines the access method after change and notifies the communication terminal apparatus of switching the access method before change to the determined access method, and performs the transmission power control in accordance with communication characteristics of the determined access method.
摘要:
An encoding unit encodes an information bit sequence. An IDFT unit generates a spectrum from the signals of the information bit sequence. A clipping unit generates, when re-transmitting the information bit sequence, a transmission spectrum that differs from that of the previous transmission. An OFDM signal generation unit transmits the transmission spectrum.
摘要:
A mobile station apparatus includes a plurality of PAs (Power Amplifiers) and a plurality of antennas and transmission performances thereof is to be improved when transmission signals having peak powers different from one another are transmitted through the use of the respective antennas. A transmission apparatus includes a plurality of PAs and a plurality of antennas and transmits a signal having a high peak power, by means of determining a transmission signal to be transmitted through the use of each of the PAs based on the capability of each of the PAs, converting the transmission signal into a frequency signal by time-frequency conversion, dividing the frequency signal into a plurality of clusters, and allocating the clusters to bands non-contiguously. Furthermore, the transmission apparatus transmits a signal having a low peak power by means of allocating the frequency signal to continuous bands.
摘要:
The present invention reduces the amount of frequency resources required for uplink cooperative communication. There is provided a base station device that is applied to a communication system in which a plurality of base station devices establish cooperative communication with at least one mobile station device and includes a base station-to-base station communication section 220 and a control information determination section 216. The base station-to-base station communication section 220 communicates with another base station device when establishing cooperative communication. The control information determination section 216 allocates a band for communication use by the mobile station device in such a manner that a signal received cooperatively by another base station device and a signal received uncooperatively by another base station device overlap with each other at certain frequencies.
摘要:
A method for producing a solution containing at least an unsaturated carboxylic acid-modified vinyl alcohol polymer is characterized by reacting a vinyl alcohol polymer and an unsaturated carboxylic acid compound in the presence of an acid catalyst soluble in the reaction system or a solid acid catalyst, and a gas barrier film is obtained by using the same. An example thereof is a method for producing a solution (A) containing an unsaturated carboxylic acid-modified vinyl alcohol polymer (b), the method comprising following two steps of: (1) a reaction step in which the unsaturated carboxylic acid-modified vinyl alcohol polymer (b) is formed by reacting a vinyl alcohol polymer and an unsaturated carboxylic acid compound (a) in the presence of an acid catalyst soluble in the reaction system; and (2) an ion exchange step in which at least the acid catalyst of acidic compounds is removed by an anion exchange resin.