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Howard Robert, Helinski Richard R, Menhennett Herbert E: A method of ink jet colour printing.. Howtek, July 16, 1986: EP0187352-A2 (164 worldwide citation)

Color printing characterized by high color density and color contrast is provided by jetting an ink composition composed of an optically clear, phase change base material and a primary subtractive color dye which is soluble in the base material onto the surface of a printing medium to form a multipl ...


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Howard Robert, Helinski Richard R, Menhennett Herbert E: Droplet ejector with control of fluid inlet to a reservoir. Howtek, August 14, 1985: GB2152877-A (1 worldwide citation)

A droplet ejector which is particularly useful as the driving head in a "dot-on-demand" ink jet printer selectively connects an ink supply (30) to an auxiliary reservoir (26) from which ink is expelled a droplet at a time in response to driving pulses. The connection is regulated to isolate the auxi ...


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Howard Robert, Helinski Richard R, Menhennett Herbert E: Impression polychrome au jet dencre, Ink jet color printing. Howtek, SMART & BIGGAR, May 9, 1989: CA1253681

D75-005 Abstract of the Disclosure Color printing characterized by high color densityand color contrast is provided by jetting an inkcomposition composed of an optically clear, phase changebase material and a primary subtractive color dye whichis soluble in the base material onto the surface of apri ...


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Howard Robert, Helinski Richard R, Larsen John R, Menhennett Herbert E: Mecanisme dalimentation en feuilles pour imprimante a organe de frappe tournant, Sheet-feed mechanism for rotary print head. Howtek, SMART & BIGGAR, January 10, 1989: CA1248488

Abstract of the Disclosure A sheet-feed mechanism (10) for a rotary print head(12) includes a track (16) that defines a paper path inthe form of a partial circular annulus. Belts (40 and42) carry tabs (36, 38, 72, and 74) that support thelower end of a paper sheet, and movement of the beltcauses the ...


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Peer Thomas R, Helinski Richard R, Lutz Carl D, Eno Philip A: Imprimante au jet dencre, Ink jet printer. Howtek, SMART & BIGGAR, July 4, 1989: CA1256742

Abstract of the Disclosure A rotary ink jet printer can print at high speed inblack and white as well as in color using hot-melt inks. The printer includes a rotary print wheel which supportsa plurality of ink jetters distributed around itsperiphery. The jetters are divided into color groupswith the ...


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Howard Robert, Helinski Richard R, Menhennett Herbert E: Ejecteur de gouttelettes. Howtek, July 19, 1985: FR2558076-A1

L'EJECTEUR DE GOUTTELETTES DE L'INVENTION COMPREND UN RESERVOIR 26 COMPORTANT UN ORIFICE D'ENTREE 24 POUR Y INTRODUIRE UN LIQUIDE ET UN ORIFICE DE SORTIE 18 POUR EJECTER DES GOUTTELETTES DE LIQUIDE DE CELUI-CI, UN PREMIER TRANSDUCTEUR 20 POUR EJECTER UNE GOUTTELETTE DE LIQUIDE PAR L'ORIFICE DE SORTI ...