摘要:
An ink jet recording apparatus for ejecting droplets of ink from a plurality of nozzles is provided. The recording apparatus comprises a nozzle plate having the plurality of nozzles and a pressure generator associated with each of the plurality of nozzles. The nozzles and said pressure generators are disposed in at least three groups and each of the groups are associated with a single color ink. The ink associated with one group of nozzles and pressure generators is lighter, and the ink associated with one group of nozzles and pressure generators is darker than the ink associated with the other groups of nozzles and pressure generators. The group of nozzles and pressure generators associated with the ink of the lightest color is situated furthest from the group of nozzles and pressure generators associated with the ink of the darkest color. The recording apparatus also comprises first reservoir means for storing ink formed between the nozzle plate and the pressure generating means having a first cross-sectional area, support means for supporting the pressure generating means and having a slit having a second cross-sectional area for supplying ink to the first reservoir means, and second reservoir means in fluid communication with the slit for storing ink having a third cross-sectional area wherein the first cross-sectional area is smaller than the second cross-sectional area and the second cross-sectional area is smaller than the third cross-sectional area for promoting capillary action in ejecting droplets of ink through the plurality of nozzles.
摘要:
A thermal ink jet recording apparatus includes at least a substrate having at least a plurality of heating elements disposed in rows in at least two groups. Each group consists of two rows of heating elements, one row arranged on either side of the ink supply portion, each of the groups of the heating elements being associated with a single color ink. At least one nozzle plate has a plurality of nozzles disposed on the substrate where at least one nozzle plate and the substrate define a space between the nozzle plate and the substrate in registration with each group of heating elements and corresponding group of nozzles associated with a single color ink. Means are provided for independently delivering ink of one color from the ink reservoir to each of the spaces, whereby printing can be independently effected in at least two colors of ink.
摘要:
A thermal ink jet recording apparatus includes a plurality of heating elements which serve as pressure generating members spaced apart from a plurality of nozzles. A reservoir, which stores ink prior to ejection through the nozzles, is formed between a nozzle plate and the pressure generating members and has a first cross-sectional area. A gap formed between a pair of substrates upon which the pressure generating members are disposed has a second cross-sectional area. An additional reservoir for storing ink is in fluid communication with the gap and has a third cross-sectional area. The first cross-sectional area is smaller than the second cross-sectional area and the second cross-sectional area is smaller than the third cross-sectional area for promoting capillary action in ejecting droplets of ink through the plurality of nozzles.
摘要:
A thermal ink jet recording apparatus includes at least a substrate having a gap disposed over an ink reservoir on a base in communication with an ink source. A film circuit of electrodes and heating elements is formed on each substrate. A nozzle plate covering the substrates has a lower step portion and a upper step portion. The upper step portion includes nozzles substantially directly above and corresponding to the plurality of heating elements. Ink which is used for this apparatus includes ionic or non-ionic surface active agents for increasing permeability of the ink on a recording medium.
摘要:
A recording medium carrier system of an image forming apparatus is constituted by independent units as a paper supply cassette, a paper feed unit, a transfer unit, a fixing unit, and a paper ejecting unit. An intermediate transfer unit in the transfer unit is provided with an intermediate transfer belt to which a toner image formed on a photoconductive drum is primarily transferred at a primary transfer position and which secondarily transfers the toner image on a recording medium at a secondary transfer position, and a driving roller for circulating the intermediate transfer belt. The primary transfer position is arranged close to the driving roller.
摘要:
A developing device includes: a developer bearing body for bearing liquid developer, the liquid developer bore by the developer bearing body being used by the developing device to develop a latent image bore by an image bearing body; a developer supplying member that has depressions in its surface and whose surface is pressed in contact with the developer bearing body for supplying the liquid developer retained in the depressions to the developer bearing body; and a restricting section for restricting the amount of the liquid developer on the developer supplying member, wherein the amount of the liquid developer, which is retained in the depressions and whose amount has been restricted by the restricting section, before being supplied to the developer bearing body is smaller than the volumetric capacity of the depressions that retain the liquid developer.
摘要:
In a color image forming apparatus, a looped belt member is stretched and circulated by at least a drive roller and a driven roller so as to have a tensed side and a slack side. Each of plural image supporting members supports a single color toner image thereon, and abuts onto the slack side of the belt member to define a transferring position at which the toner image is transferred onto either the belt member or a recording medium held by the belt member, while being rotated. A circumferential velocity of each image supporting member is determined so as to be higher than a circulation velocity of the belt member.
摘要:
A recording medium carrier system of an image forming apparatus is constituted by independent units as a paper supply cassette, a paper feed unit, a transfer unit, a fixing unit, and a paper ejecting unit. An intermediate transfer unit in the transfer unit is provided with an intermediate transfer belt to which a toner image formed on a photoconductive drum is primarily transferred at a primary transfer position and which secondarily transfers the toner image on a recording medium at a secondary transfer position, and a driving roller for circulating the intermediate transfer belt. The primary transfer position is arranged close to the driving roller.
摘要:
An image forming apparatus which is able to form either single or double sided copies on a recording medium while achieving an excellent image quality in either a matted or glossy finish. The image forming apparatus includes a fixing portion in which a first roller includes a first temperature and hardness for forming a matted image, whereas a second roller includes a higher temperature and hardness for forming a glossy image. Alternatively, or in addition, to different hardness and temperatures, the recording medium can be conveyed at a first speed to form a matted image, and a slower speed to form a glossy image. The image forming apparatus further includes an inverse and re-fixing sub-mode, which utilizes an inverting and returning passage, for reducing the curl in a recording medium, and thus also reducing the instances in which clogging takes place. The inverting and returning passage has a length sufficient to accommodate a plurality of recording mediums. Moreover, the image forming apparatus is provided with first and second discharge passages so that if one passage is clogged, the other can be used to discharge recording mediums. A switching means selects, based on detection sensors, through which discharge passage a recording medium is fed. The operations of the image forming apparatus are coordinated by a control unit.
摘要:
A first container is operable to accommodate a liquid toner, and provided with a window. A reflector is disposed in the first container. A light emitter is operable to emit light to the reflector through the window and the liquid toner. A light receiver is operable to receive the light reflected by the reflector through the liquid toner and the window. A detector is operable to detect a concentration of the liquid toner based on the light received by the light receiver.