An ink temperature control apparatus having an enclosed heat conducting structure with ink circulating therein is provided in a ink jet printer. The temperature control apparatus includes a heating element attached to the structure and thermally engaged with the ink contained within the ink structure. A temperature sensing device is also located on the structure and is thermally engaged with the ink contained within the structure. A control system is provided to respond to the temperature sensin...

Upon one or both surfaces of an accelerating electrode having a center aperture is overlaid and fixed concentrically a disk member or members each having a center aperture tapered so as to converge toward the accelerating electrode. Unnecessary ink attached to the accelerating electrode may be sucked through the interface or interfaces between the disk member or members and the accelerating electrode under capillary action and ink attached to the disk members may readily flow toward the interfac...

A printing process includes printing a liquid ink onto a substrate surface. The ink includes a vehicle and a colorant dissolved in the ink. When the ink solidifies on the substrate the colorant, which is substantially insoluble in the solidified ink, migrates and locks to the surface to provide a substantially permanent readable color to the surface.

An improved ink suitable for ink jet printing comprising, a mixture of a colorant, an arylketoalkene stabilizing compound or a photoreactor, and a liquid vehicle, wherein the colorant is light-stable. When the photoreactor is combined with a wavelength-selective sensitizer to form a radiation transorber, the colorant is mutable upon exposure of the radiation transorber to specific, narrow bandwidth radiation. The colored composition may also contain a molecular includant having a chemical struct...

An improved ink suitable for ink jet printing comprising, a mixture of a colorant, an arylketoalkene stabilizing compound or a photoreactor, and a liquid vehicle, wherein the colorant is light-stable. When the photoreactor is combined with a wavelength-selective sensitizer to form a radiation transorber, the colorant is mutable upon exposure of the radiation transorber to specific, narrow bandwidth radiation. The colored composition may also contain a molecular includant having a chemical struct...

The present invention relates to an ink for ink-jet recording containing carbon black particles having a specific surface active hydrogen content, water, and polyethyleneimine or alkylene oxide adduct of acetylene glycol.

This invention relates to printing inks for use on coarse or other paper or liquid-permeable base material comprising a coloring agent and a varnish, said varnish having a PH below 7 consisting essentially of a solution in 20-100 parts by weight of a glycol solvent of (a) 100 parts by weight of acid resin plus up to 30 parts by weight of an adduct-forming acid for every 100 parts of base resin and having an acid number of at least 60 and (b) the water-soluble salt formed by reaction of the acidi...

An inker and form roller unit for a printing press includes a continuously rotating fountain roller for carrying ink from a reservoir. A combi-roller is in constant contact with a distribution roller to deliver ink to rollers of the printing press. The combi-roller and distribution roller are supported by a swivel lever that can pivot about the rotational axis of the distribution roller. The swivel lever carries a cam roller for contact with a control body having two or more sections, one of whi...

A watercolor ink contains a water-soluble dye, water, and at least one benzyl ether represented by the general formulas ##STR1## (wherein n.sub.1 stands for an integer of 3 to 15) and ##STR2## (wherein m stands for an integer of 1 to 15 and n.sub.2 for 0 or an integer of 1 to 14, providing that 1.ltoreq.m+n.sub.2 .ltoreq.15 is satisfied).

A composition of matter useful for printing at elevated temperatures comprising polyethylene, an ester of rosin and minor amounts of coloring matter.