Abstract: An ink jet print head comprising: a diaphragm array including a group of bending curved partitions defining a multiplicity of orderly arranged ink channels, an upper end wall bridging between upper ends of partitions and a lower end wall bridging between lower ends of the partitions; an orifice board fixed to one surface of each of the upper and lower end walls of the diaphragm array and closing one mouth of each ink channel with a slight gap with respect to the individual partitions so as to allow the individual partitions to bend, the orifice board having a multiplicity of ink jet orifices communicating with the respective ink channels; a back board fixed to the other surface of each of the upper and lower end walls of the diaphragm array and closing the other mouth of each ink channel with a slight gap with respect to the individual partitions so as to allow the individual partitions to bend, the back board having a multiplicity of ink supply inlets through which ink is to be supplied to the respective ink

Abstract: A compatible thermal head includes multiple heat generating elements arranged in a row on a substrate, and multiple drive devices, selectively coupled to the heat generating elements, for driving a corresponding at least one of the heat generating elements. The quantity of drive devices is less than the quantity of heat generating elements. Also included in the thermal head are a strobe signal input device for receiving multiple external strobe signals as input, and a number-of-strobe-signals converting device, integral to the thermal head and coupled to the strobe signal input device, for converting the multiple external strobe signals received by the strobe signal input device into multiple internal strobe signals. The quantity of the internal strobe signals is greater than the quantity of the external strobe signals.

Abstract: A pair of holes are formed with a predetermined space therebetween on a long and narrow base plate. An adhesive is applied to the surface of the base plate. Head substrates each having a row of thermal resistors on the surface thereof are placed on the adhesive on the base plate such that the joint of the head substrates is positioned between the pair of holes of the base plate. The adhesive is hardened in the state in which the head substrates are pushed upward by a thruster(s) means inserted into a pair of holes while the base plate is supported from below and the head substrates is pressed from above. The base plate is bonded to a radiating plate by an adhesive only at the central portion. Thus, there is no difference in level at the joint of the head substrates, and even when the radiating plate expands due to heat, the base plate is not deformed.

Abstract: A thermal head has a reduced power capacity and an electronic apparatus incorporates that thermal head. Printing data is stored in a shift register while ON-data for one line is latched relative to each block in a heating element array. A microcomputer checks the magnitude of the number of ON-data in each block. If the number of ON-data is equal to or less than a given value, the microcomputer outputs a strobe signal to that block so that the heating elements therein will be batch-driven. If the number of ON-data exceeds the given level, the microcomputer outputs two or more strobe signals to that block which in turn is further divided into two blocks. The two or more divided blocks are sequentially driven. In order to change the batch-printing range depending on the printing rate, the power capacity can be reduced to the minimum level within the necessary limit.

Abstract: A method of producing a printing head provided in an ink jet printer for jetting ink particles onto paper. A piezoelectric block is formed with a plurality of aligned curved through channels to be filled with ink. Each channel is formed with an electrode on its internal walls. Then, positive and negative voltages are applied to a pair of electrodes conforming one partition wall so as to cause a polarization of the partition wall present between the channels. A front plate having orifices for jetting the ink and a back plate having ink supply path are mounted on the front and rear sides of the piezoelectric block.

Abstract: A composite printing device comprises a portable printer and a tape printer case removably engageable with the portable printer from below. The portable printer includes a bottom printing head, a pair of drive wheels and a pair of idle wheels. The tape printer case accommodates a tape roll for supplying a tape, a platen for guiding the tape, and a feed roller for feeding the tape from the tape roll. When the tape printer case is engaged with the portable printer, the printing head faces the tape guided by the platen while the drive wheel is operatively connected to the feed roller for rotationally driving the feed roller.

Abstract: A pair of holes are formed with a predetermined space therebetween on a long and narrow base plate. An adhesive is applied to the surface of the base plate. Head substrates each having a row of thermal resistors on the surface thereof are placed on the adhesive on the base plate such that the joint of the head substrates is positioned between the pair of holes of the base plate. The adhesive is hardened in the state in which the head substrates are pushed upward by thrusting means inserted into a pair of holes while the base plate is supported from below and the head substrates is pressed from above. The base plate is bonded to a radiating plate by an adhesive only at the central portion. Thus, there is no difference in level at the joint of the head substrates, and even when the radiating plate expands due to heat, the base plate is not deformed.