RAYMOND R NADEAU
Broker in Natick, MA
License number
Massachusetts 9034635
Issued Date
Mar 16, 2000
Expiration Date
May 9, 2002
Type
Salesperson
Address
Address
Natick, MA 01760
Professional information
Electrostatic Lithographic Printing Process Utilizing Hydrophilizing Composition
US Patent:
3970455, Jul 20, 1976
Filed:
Jun 4, 1973
Appl. No.:
5/366953
Inventors:
Raymond R. Nadeau - Natick MA
John E. Wyman - Lexington MA
John E. Wyman - Lexington MA
Assignee:
Itek Corporation - Lexington MA
International Classification:
G03F 702, G03G 508
US Classification:
96 33
Abstract:
A lithographic printing plate is produced by the steps of forming a latent electrostatic image on a photoconductive zinc oxide insulating layer and developing this layer with a toner which forms an imagewise deposit on the recording layer. Applicants' invention relates to contacting the portions of the recording layer which are not covered with the hydrophobic deposit with a hydrophilizing composition (commonly called a conversion wash) comprising the reaction product of (1) phosphoric acid or one of the anions derived from such acid, (2) an organic amine compound, and (3) a hydrophilic metal cation, to form a reaction product with zinc ions from the zinc oxide which reaction product of zinc ions with said composition is substantially insoluble in said composition and is preferentially wetted by water thereby repelling lithographic inks. The plate produced by this process is especially useful for use on a lithographic offset press to produce multiple copies of an original.
Hydrophilizing Composition For Lithographic Printing Plates
US Patent:
4053319, Oct 11, 1977
Filed:
Aug 7, 1975
Appl. No.:
5/602863
Inventors:
Raymond R. Nadeau - Natick MA
John E. Wyman - Lexington MA
John E. Wyman - Lexington MA
Assignee:
Itek Corporation - Lexington MA
International Classification:
C09K 300, C09K 1134, C09K 1142
US Classification:
106 2
Abstract:
A lithographic printing plate is produced by the steps of forming a latent electrostatic image on a photoconductive zinc oxide insulating layer and developing this layer with a toner which forms an imagewise deposit on the recording layer. Applicants' invention relates to contacting the portions of the recording layer which are not covered with the hydrophobic deposit with a hydrophilizing composition (commonly called a conversion wash) comprising the reaction product of (1) phosphoric acid or one of the anions derived from such acid, (2) an organic amine compound, and (3) a hydrophilic metal cation, to form a reaction product with zinc ions from the zinc oxide which reaction product of zinc ions with said composition is substantially insoluble in said composition and is preferentially wetted by water thereby repelling lithographic inks. The plate produced by this process is especially useful for use on a lithographic offset press to produce multiple copies of an original.