David W Adkins

US Patent:

45350507, Aug 13, 1985

Filed:

Jul 18, 1983

Appl. No.:

6/514397

Inventors:

Paul C. Adair - Chillicothe OH
David G. Adkins - Chillicothe OH

Assignee:

The Mead Corporation - Dayton OH

International Classification:

G03C 140
G03C 168
G03C 1495

US Classification:

430138

Abstract:

An improved means for exposing and developing photosensitive sheets employing a microencapsulated radiation sensitive composition wherein a cover sheet is adhered to a layer of the microcapsules and following exposure the cover sheet is peeled away to rupture the microcapsules and develop the image. The cover sheet also reduces the oxygen concentration at the surface of the microcapsules and thereby enhances the sensitivity of the imaging sheet.

US Patent:

45783390, Mar 25, 1986

Filed:

Aug 23, 1984

Appl. No.:

6/643565

Inventors:

David G. Adkins - Chillicothe OH

Assignee:

The Mead Corporation - Dayton OH

International Classification:

G03C 168
G03C 554
G03C 700
B01J 1302

US Classification:

430138

Abstract:

A photosensitive transfer imaging system comprising an imaging sheet and a developer sheet; the imaging sheet incudes a photographic support, a layer of photosensitive microcapsules on one surface of the support wherein the microcapsules have a discrete capsule wall and contain a chromogenic material and a photosensitive composition such as a polyethylenically unsaturated compound and a photoinitiator; the developer sheet includes a support member and a layer of a developer composition such as a salicylic acid salt; the imaging sheet and/or the developer sheet additionally includes a plurality of microcapsules which contain an oil in which the chromogenic material is soluble; images are formed by image-wise exposing the imaging sheet to actinic radiation and rupturing the microcapsules in contact with the developer sheet whereupon the chromogenic material is image-wise transferred to the developer sheet.

US Patent:

45943702, Jun 10, 1986

Filed:

Mar 29, 1985

Appl. No.:

6/717930

Inventors:

David G. Adkins - Chillicothe OH

Assignee:

The Mead Corporation - Dayton OH

International Classification:

C08K 900

US Classification:

523208

Abstract:

A process for producing amine-formaldehyde microcapsules wherein the reaction of the amine and formaldehyde to form the microcapsule wall is carried out in the presence of a polyol as a systems modifier.