Daniel G Rogers

US Patent:

6334678, Jan 1, 2002

Filed:

Sep 1, 1999

Appl. No.:

09/388206

Inventors:

Robert L. Daigneault - Longmeadow MA
Michael F. Koenig - Goshen NY
Otto Ondruska - Erie PA
Daniel R. Rogers - Erie PA
Jiyue Yang - Towaco NJ

Assignee:

International Paper Company - Purchase NY

International Classification:

B41J 201

US Classification:

347107, 347100, 347103

Abstract:

A method and an apparatus for applying chemical watermarks to a substrate, e. g. , paper, using a digital printer which prints ink in a dot matrix pattern. The ink may contain either a translucentizing agent or an opacifying agent. The printer is digitally controlled to print ink in accordance with a computer program corresponding to a desired pattern or image.

US Patent:

59166738, Jun 29, 1999

Filed:

Jul 31, 1997

Appl. No.:

8/904241

Inventors:

Mario Fryberg - Praroman, CH
Roland Kurzen - St. Antoni, CH
Klaus Haarmann - Marly, CH
Diane L. Blednick - Fairview PA
Daniel R. Rogers - Erie PA

Assignee:

Ilford AG - Fribourg

International Classification:

B41M 500

US Classification:

428328

Abstract:

A recording sheet for ink jet printing comprising a support having coated onto said support one or more layers receptive for aqueous inks, said coating comprising at least one film forming, hydrophilic polymer or a mixture of film forming hydrophilic polymers and imbedded in this film at least one trivalent salt of a metal of the Group IIIb series of the periodic table of elements or complexes which comprise trivalent ions of the metals of Group IIIb of the periodic table of the elements. In another embodiment the salts or complexes of Group IIIb elements are coated directly on the substrate surface without the presence of the film forming polymer.