Hewlett-packard Company

Imperial Chemical Industries Limited

Hewlett-packard Development Company, L.p.

Hewlett-packard Corporation

Imtech Technologies LLC

Suraj L Hindagolla

Charles L Thierheimer, Jr

John M Skene

Paul H McClelland

Ronald W Kenyon

Si-Ty Lam

David Greenwood

Howard H Taub

Nigel Hughes

Garold Eugene Radke

James S Aden

Glen A Hopkins

Norman E Pawlowski

Raymond J Adamic

Palitha Wickramanayake

Louis C Barinaga

Loren E Johnson

David J Halko

John Arthur deVos

Steven J Bares

Lisa M Pagh

There is disclosed an ink composition and a method of printing and using ink on substrate material comprising polyvinyl chloride with thermal inkjet, drop on demand piezo inkjet, or continuous inkjet by depositing ink comprising vinyl-penetrating solvent, colorant and non-aqueous carrier solvent, the ink being free from polymerizable resins and binders.

Ink composition for inkjet printing on substrate material comprising polyvinyl chloride

A production system includes a reaction chamber having an inlet and outlet, a gas collection chamber coupled with the reaction chamber and a regulator coupled to the gas collection chamber. The regulator controls the flow of reactant to the reaction chamber in response to the pressure in the gas collection chamber.

Regulated hydrogen production system

Selected portions of the orifice plate surfaces are formed to have wetting and non-wetting surface characteristics for minimizing the accumulation of residual ink on the outer surface of the plate and for enhancing the flow of supply ink to the orifices of the plate.

Orifice plate for an ink-jet pen

A dye which, in the free acid form, has the formula ##STR1## wherein W is COOH

Anionic dye

Inks for ink-jet printing have improved water resistance and smear resistance when they contain from about 2.5 to 25%, preferably from about 7.5% to about 12.5%, by weight, 2-pyrrolidone, N-(2-hydroxyethyl)-2-pyrrolidone, or mixtures thereof.

Smear resistant inks for ink-jet printers

A print which has superior waterfastness can be made on paper from an ink-jet printer using an ink comprising a water soluble dye, water with or without a water soluble organic solvent, and sufficient polyalkylene polyamine to provide the ink with a pH of at least 10. About 2 to 10% urea may be added to the ink to reduce crusting of the ink.

Waterfast ink formulations for thermal ink-jet using organic amines

Inks are provided comprising (a) at least two dyes corresponding to the formula ##STR1## wherein W is COOH,

Ink formulations by mixing anionic waterfast dyes containing two or more

Anionic dye having high water-fastness

Inks for ink-jet printing containing Direct Black 168 dye have improved water resistance when the sodium cations on the dye are replaced with cations selected from the group consisting of ammonium, polyfunctional, and volatile amine cations.

Waterfastness of DB-168 ink by cation substitution

Inks are provided comprising (a) a dye corresponding to the formula ##STR1## wherein W is COOH,

Waterfast ink formulations with a novel series of anionic dyes

Inks for ink-jet printing have improved smear resistance when they contain from about 15 to 50%, preferably from about 20% to about 30%, formamide.

Smear resistant inks for thermal ink-jet printers

A dye used in ink compositions for ink-jet printing comprises an aromatic dye molecule having attached to the backbone thereof from one to four polyhydroxyl-substituted groups having the formula selected from the group consisting of:

Growing community of inventors

Corvallis, OR, United States of America

Suraj L Hindagolla