摘要:
In a supply system which includes an ink container for reserving a predetermined amount of ink to be supplied to a printing head and which is configured such that ink is intermittently supplied to the container from an ink tank, there is provided a structure that fundamentally eliminates waste of ink associated with an operation of charging the container to apply a required negative pressure to the head. An ink containing body in which a negative pressure can be generated because of its elasticity is provided in the container. After the ink containing body is expanded to introduce ink into the same by depressurizing the interior of the container, the interior of the container is pressurized to contract the ink containing body, thereby returning a predetermined amount of ink to the tank. A negative pressure is thus generated in equilibrium with an ink meniscus holding ability of the head.
摘要:
In a structure which includes a second tank for reserving a predetermined amount of ink to be supplied to a printing head and in which a supply system is configured such that ink is intermittently supplied to the second tank from a first tank, a high charging efficiency to and shortened processing time for charging the second tank, and high overall usability of ink are achieved. In an orientation upon using the printing apparatus, a port of a channel located at the second tank side for supplying ink from the first tank to the second tank is arranged relatively high position and an outlet port for supplying ink from the second tank to the head is arranged relatively low position in relation to the direction of gravity, and a port of the channel located at the first tank side is arranged at the bottom of the first tank.
摘要:
An ink tank is formed having a generally rectangular parallelepiped shape, and air/fluid separating members having air pores are provided around at least the corner portions of the generally rectangular parallelepiped. The inner faces of wall members forming the outer faces of the generally rectangular parallelepiped are formed with an inclination of a predetermined angle as to the outer face of the wall member which it faces.
摘要:
The present invention provides an image forming apparatus for forming an image by discharging liquid from a recording head onto a recording medium, comprising a carriage to which the recording head and a sub-tank for storing the liquid to be supplied to the recording head are mounted and which can be shifted reciprocally, a main tank disposed out of the carriage and adapted to store the liquid, a liquid flow passage connected between the main tank and the sub-tank in order to supply the liquid from the main tank to the sub-tank, a flow passage opening/closing valve disposed in the liquid flow passage on the way and adapted to open and close the liquid flow passage, and control means for controlling opening/closing of the flow passage opening/closing valve in accordance with an image forming condition during image formation using the recording head.
摘要:
For eliminating waste of ink and achieving high charging efficiency with a reduced charging time where a printing head is equipped with a second tank for reserving a predetermined amount of ink and a supply system is configured to supply ink from a first tank to the second tank intermittently, the second tank is provided with a variable internal volume. The internal volume is varied to cause the second tank itself to function as an actuator for charging ink and performing a venting process. Specifically, the internal volume is forcibly reduced to cause a reverse flow of a gas residing in the second tank along with ink into the first tank, which makes it possible to generate of waste ink that is released to the outside. A normal charging operation can be completed simply by causing a change in the opposite direction (the direction of increasing the internal volume). Relatedly, the second tank may be provided with a member for holding ink and generating a negative pressure originating from an elastic force. With connection of the first tank and the member, the pressure in the second tank is reduced to cause the member to expand, thereby introducing ink into the same. This introduction is stopped by regulating the expansion with a displaceable unit which expands when the pressure is reduced. The regulation is performed at such a position that the negative pressure generated in the member by canceling regulation is in equilibrium with an ink meniscus-holding ability of the printing head.
摘要:
The present invention provides an apparatus having a carriage, in which, even when a toothed belt having a fine tooth pitch and low tooth height is used to drive the carriage, a jumping phenomenon of the toothed belt is positively prevented to thereby achieve stable scanning of the carriage without requiring a driving motor having a large capacity and an additional carriage position detecting device. A member for preventing the jumping of the toothed belt is disposed to create a predetermined gap with respect to a back surface of the toothed belt and is inclined with respect to the back surface by a predetermined angle at a position where the member is opposed to the back surface of a portion of the toothed belt to which the carriage is connected, in the vicinity of the driving pulley for the toothed belt connected to the carriage on which a head is mounted.
摘要:
The present invention relates to a recording apparatus which has a positioning means for manual sheet feeding for aligning a sheet feeding position, and a positioning means for auto sheet feeding provided on an auto sheet feeder for aligning the sheet feeding position, and a sheet fed from the auto sheet feeder does not abut against the positioning means for manual sheet feeding, when the auto sheet feeder is attached to the recording apparatus main body.
摘要:
An ink jet recording apparatus includes a movable carriage capable of moving as designed while carrying, hereon, a plurality of different recording heads for discharging ink to record characters and/or images and a plurality of different ink tanks for storing ink to be supplied to the recording heads, the recording heads and the ink tanks being changeable; a restoring unit capable of restoring the recording heads; a detection unit for determining the type of the recording head or the ink tank; and a control unit for causing the restoring unit to restore the recording head in a case where the detection unit has detected change of the recording head or the ink tank to the recording head or the ink tank of the same type, and inhibiting the restoring unit from restoring the recording head in a case where the detection unit has detected change to the recording head or the ink tank of a different type.
摘要:
The present invention provides a sheet supplying apparatus comprising a sheet stacking means for stacking a plurality of sheets, a sheet supply means for feeding out the sheets stacked on the sheet stacking means, a separation means for separating the sheets one by one by abutting the sheets against the separation means to cause elastic angular change in the sheet thereby to ride the sheet over the separation means, and a guide means having a guide surface for guiding the sheet separated by the separation means toward a downstream side, and wherein the sheet stacking means is provided at its downstream end with a projection which protrudes toward downstream sides of the separation means and of the guide surface of the guide means.
摘要:
A recording apparatus having an image reading operation capable of performing image reading by an image reading device for converting image information into electrical signals, and an image recording operation by a recording device for forming an image onto a recording medium is disclosed. The recording apparatus comprises a mounting unit capable of mounting both the image reading device and the recording device, a sensor for sensing which one of the image reading device and the recording device is mounted on the mounting unit, a quality preserving section for preserving the image quality in the recording operation, and a controller for controlling the reading operation by the image reading device, the recording operation by the recording device, and the quality preserving operations. The controller disenables the quality preserving operations by the quality preserving section, when the result sensed by the sensor indicates that the image reading device is mounted on the mounting unit.