摘要:
The present invention provides an ink jet printer which performs recording by causing a nozzle to discharge an ink drop onto a recording medium. The nozzle is connected to an ink channel in which aqueous ink is housed. The printer head can vary the dot size on the recording medium by changing the size of the drop that is discharged from the nozzle. The aqueous ink has a degree of surface tension change .DELTA.S that is expressed by the relation .DELTA.S=(S.sub.1 -S.sub.3)/ S.sub.2 of 0.3 or less, wherein S.sub.2 is the surface tension at 25.degree. C., and has a value of 20 to 50 dynes/cm, S.sub.1 is the surface tension at 5.degree. C., and S.sub.3 is the surface tension at 40.degree. C.
摘要:
The present invention relates to an ink for ink-jetting containing at least a coloring material, water soluble organic solvent and water, comprising:0.01-5.0% by weight of alkylene oxide adduct of acetylene glycol, represented by the formula (A): ##STR1## (in which R.sub.1 -R.sub.4, are respectively an lower alkyl group; l is an integer of 2 or 3; and m and n are respectively an integer of 1 or more);6.0-14.0% by weight of a compound selected from the group consisting of a polyalcohol having three hydroxy groups, alkylene glycols represented by the formula (B):HO(C.sub.x H.sub.2x O).sub.y H (B) (in which x and y is respectively an integer, provided that x is 2 or more and x and y have a relation of 2.ltoreq.X.times.y.ltoreq.6), and a mixture thereof;4.0-10.0% by weight of a lower alkyl ether of alkylene glycol represented by the formula (C):HO(C.sub.p H.sub.2p O).sub.q R (C) (in which R is a lower alkyl group, p and q is respectively an integer, provided that p is 2 or more and p and q have a relation of 2.ltoreq.p.times.q.ltoreq.6), or a mixture thereof,2.0-8.0% by weight of polyalkylene glycol having a molecular weight of 150-600; and water,% by weight being based on total weight of the ink.
摘要:
The present invention relates to an ink for ink-jetting, comprising: a coloring material, alkylene oxide adduct of acetylene glycol, water, and polyethyleneimine, alkali metal ethylenediaminetetraacetate or a mixture of NaOH with at least one compound selected from the group consisting of NaHCO.sub.3 and Na.sub.2 B.sub.4 O.sub.7.
摘要:
The present invention related to a toner used in a toner-jetting system wherein the toner is jettingly adhered to a recording medium in a direct manner, the toner having a specific aerated bulk density, a specific distribution of a particle size and/or a specific mean roundness.
摘要:
The present invention related to a toner used in a toner-jetting system wherein the toner is jettingly adhered to a recording medium in a direct manner, the toner having a specific angle of repose, a specific mean roundness and/or a specific distribution of a particle size.
摘要:
The fixing device of the present invention comprises a heating roller having an internal heating device; a flexible fixing belt wrapped around the exterior side of the heating roller and having a circumferential length longer than the circumferential length of the heating roller; and a pressure roller for pressing against the heating roller through the fixing belt, wherein a slack part of the fixing belt is formed on the downstream side from the pressure contact part between the heating roller and the pressure roller in the direction of transport of the recording medium, such that this slack part touches the exterior surface of the pressure roller.
摘要:
The present invention related to a toner used in a toner-jetting system wherein the toner is jettingly adhered to a recording medium in a direct manner, the toner having a specific cohesion degree, a specific distribution of a particle size and/or a specific mean roundness.
摘要:
The present invention relates to a toner used in a toner-jetting system wherein the toner is jettingly adhered to a recording medium in a direct manner, said toner satisfying a specific relationship between an average quantity of charge (x)(&mgr;C/g) and a distribution deviation of quantity of charge (y).
摘要:
Provided is a deposited-toner measuring apparatus capable of accurate detection of the amount of toner deposited on the toner carrying member, and an image forming apparatus equipped with the aforementioned measuring apparatus and capable of controlling the amount of toner deposited on the toner carrying member to a desired level so as to provide stable image quality at all times. A deposited-toner measuring apparatus that removes a toner layer in a part of the surface of the toner carrying member, detects change in the capacitance at the portion with a toner layer and the portion without such a toner layer, and detects the amount of the deposited toner based on the detection result of the said change in the capacitance.
摘要:
An image forming apparatus includes a fixing device for heating and pressing a toner image on a recording medium, a non-contact heating device arranged downstream of the fixing device for heating the toner image without coming into contact with the toner image, and a pressure contact device arranged downstream of the non-contact heating device and having a smooth surface. The pressure contact device has first and second arrangement states switched according to the kind of the recording medium. In the first arrangement state, the pressure contact device is arranged so as to make pressure contact with the toner image. In the second arrangement state, the pressure contact device is arranged so as not to make pressure contact with the toner image.