摘要:
A length of a melamine foamed block to be accommodated in an ink tank housing as measured in the longitudinal direction is dimensioned to be larger than a length of the ink tank housing as measured in the longitudinal direction. Thus, while the foamed block is accommodated in the ink tank housing, it is compressed in the direction orienting toward an ink feeding port from which ink is fed to a printing head, i.e., in the ink feeding direction. Consequently, the ink retaining force induced by the capillary force is not intensified in the compressing direction of the melamine foamed block, resulting in an ink feeding capability of the printing head being improved. On the contrary, the ink retaining force effective at a right angle relative to the compressing direction of the melamine foamed block is intensified.
摘要:
An ink container includes an ink absorbing material accommodating chamber for accommodating an ink absorbing material for retaining ink to be supplied to a recording head; an ink supply opening connectable with said recording head to supply the ink to the recording head from said accommodating chamber; an air vent portion for fluid communication between said accommodating chamber with ambience; wherein said air vent portion has an inside opening in fluid communication with an inside of said accommodating chamber, an outside opening open to the ambience, and a fluid communication path in fluid communication with said inside opening and outside opening; wherein said outside opening takes, when-said container is mounted on an apparatus with which it is usable, a position lower than that taken by said inside opening.
摘要:
An ink jet head comprises parts for holding liquid ink, the parts being sealed with a moisture-curing sealant composed mainly of an organic high polymer compound having an alkoxysilane moiety represented by Formula (1) in the molecule thereof: ##STR1## where X is hydrogen, methyl, ethyl, propyl or halogen; R is methyl, ethyl or propyl; and n is 1, 2 or 3.
摘要:
In a phase synchronization circuit including a digital phase comparator, a synchronism discrimination circuit, a charge pump circuit, a loop filter, a voltage controlled oscillator, and a frequency-division circuit, the charge pump circuit comprises a level comparator comparing the output voltage of the loop filter with a predetermined reference voltage, for outputting a level discrimination signal, a first AND circuit for outputting a logical product of an output UP of the phase comparator and the level discrimination signal, an inverter for outputting an inverted signal of an output DOWN of the phase comparator, and a second AND circuit for outputting a logical product of an output signal of the inverter and the level discrimination signal. A PMOS transistor is connected at its source to a voltage supply through a constant current source, and has its gate applied with an output signal of the AND circuit, and its drain connected to an input of the loop filter, and an NMOS transistor is connected at its drain to the input of the loop filter and has its gate applied with an output signal of the AND circuit and its source connected to ground through a constant current source.
摘要:
A process for preparing and packaging an ink jet cartridge in a package container is disclosed. The ink jet cartridge is filled with ink and has an outer frame, a discharge port for discharging the ink and an electrical connecting portion through which a recording signal is supplied to discharge the ink through the discharge port. The package container includes a recess member having a recess portion in which the ink jet cartridge is received, a cap member joined to the recess member to close the recess portion, and a rib for supporting the outer frame of the ink jet cartridge. The rib is provided on the recess member and/or the cap member, and supports the ink jet cartridge so that the discharge port and/or the electrical connecting portion are prevented from contacting the recess member and the cap member. The process includes the steps of providing the ink jet cartridge filled with ink, providing the package container, positioning the ink jet cartridge filled with ink in the recess member of the package container and closing the recess member in which the ink jet cartridge is positioned with the cap member.
摘要:
In order to detect a plurality of framing bit sequences for establishing synchronization at a receiver in a digital communications system, first and second counters are rapidly reset in order to establish the synchronization as early as possible. A comparator receives a bit stream transmitted and a desired bit sequence for use in detecting the framing bit, and compares the desired bit sequence with part of the bit stream and issues a coincidence signal in the event that the desired bit sequence coincides with the part of the bit stream. The first counter is coupled to receive the coincidence signal, and allows an output indicating the establishment of the synchronization to issue in the event that it reaches a predetermined number of correct coincidence signals. The second counter counts up the number of occurrences of the output of a clock counter, and resets itself and the first counter when reaching a predetermine number of occurrences of a pseudo-coincidence signal.
摘要:
A liquid ejection recording head comprises a supporting substrate having energy generating elements thereon, a lid member and a wall portion between the supporting substrate and the lid member. The wall portion includes a surrounding wall that forms a liquid chamber between the substrate and the lid member and an enclosing wall disposed around the surrounding wall that provides a gap between the surrounding and enclosing walls, which gap is in communication with the exterior of the head through an opening in the enclosing wall. The wall portion also includes a plurality of substantially similar, parallel wall members, a first plurality of which forms an array of flow paths from the liquid chamber to orifices for discharging liquid when the energy generating elements are actuated and a second plurality of which forms open channels not in communication with the liquid chamber but in communication with the exterior of the recording head. The wall portion enables a secure bond to be made with the lid member, since it presents sufficient contact area for bonding, while the open channels and gap prevent air from being trapped between the lid member and substrate during assembly of the head.
摘要:
An ink jet recording head has a liquid supply path communicating with a discharge port for discharging ink therethrough and energy generating means provided correspondingly to the liquid supply path and generating energy utilized to discharge the ink, charactrized in that the liquid supply path upstream of the energy generating means is filled with a filler, and an area in which the percentage of voids increases toward the upstream direction is provided in the upstream portion of the liquid supply path filled with the filler. In a preferred embodiment the filler comprises a plurality of glass balls having increasing diameters in the upstream direction. The use of such a filler increases the frequency response, droplet ejection speed and droplet diameter of the recording head.