Eastman-kodak Company

Hal E Wright

Joseph Y Kaukeinen

Michael T Regan

Louis J Rossi

James A Van Allan

Martin A Berwick

Melvin S Bloom

Beth G Wright

Donald Saul Rimai

Douglas E Bugner

Joseph A Pavlisko

Kevin M Johnson

Tsang J Chen

William J Staudenmayer

John E Derimiggio

Muhammad Aslam

Ernest J Tamary

Stewart H Merrill

Marie B O'Regan

Frederick A Stahly

Joseph F Laukaitis

Ernest W Turnblom

Paul D VanderValk

Henry V Isaacson

Paul A Hartley

Carlton D Baxter

Henry V Ksaacson

The photoconductive element of the invention comprises an electrically conductive support and a photoconductive material capable of generating positive charge carriers when exposed to actinic radiation, the element having, situated between the support and the photoconductive material, an electrical barrier layer that restrains the injection of positive charge carriers from the conductive support, the barrier layer comprising a polyester ionomer. The method of the invention comprises coating on an electrically conductive support an aqueous dispersion of a polyester ionomer as a barrier layer, coating a charge generation layer over the barrier layer, and coating a p-type charge transport layer over the charge generation layer.

Photoconductive element having a barrier layer

A dry toner image is embedded in a thermoplastic layer on a receiving sheet by pressing a ferrotyping web against the image in the presence of sufficient heat to soften the layer. Preferably, the layer is preheated and the web and image are pressed together by a pair of hard rollers to a pressure in excess of 100 pounds per square inch. A curl preventing layer opposite thermoplastic layer does not offset on a backing roller because it has a melting point above the temperature of the process.

Toner fixing method and apparatus and image bearing receiving sheet

A temperature control device, for controlling, at a desired set point, the temperature of an environment or member being heated or being cooled, is particularly suitable for controlling the temperature of a heated electrostatographic fuser roller. The device includes a large tolerance, low precision temperature sensing element that is encapsulated in a compound that has a known and precise solid/liquid phase change melting or freezing point approximately at such a desired temperature set point. The device also includes a control unit which during a warmup or a cool-down period for the environment or member, for example, the heated fuser roller, repeatedly monitors the temperature of the encapsulated sensing element in order to detect the phase change point, for example, the melting point of the encapsulating compound. The phase change point, when so detected, is then utilized by the control unit to responsively self-calibrate the control device, thereby substantially increasing its overall precision in controlling the temperature of the environment or member.

Self-calibrating temperature control device for a heated fuser roller

Rolls with improved properties having an outer layer comprising cured fluoroelastomer containing pendant polydiorganosiloxane segments that are covalently bonded to the backbone of the fluoroelastomer. The outer layer provides a release surface that is abhesive to heat-softenable toner material.

Roll useful in electrostatography

Hydroxyaluminumphthalocyanine having reduced green absorption

A chloroaluminumphthalocyanine (CAP) colorant compound having peak absorption at about 640 nm and reduced absorption below the 640-nm peak are disclosed. CAP is useful as an electrically photosensitive compound in photoelectrophoretic imaging processes.

Chloroaluminumphthalocyanine exhibiting reduced green spectral absorption

Electrically photosensitive materials and elements comprising an electrically photosensitive polymeric compound of the structure: ##STR1## wherein: R.sub.1 and R.sub.3, which are the same or different, represent a substituted or unsubstituted alkyl group having from 1 to 18 carbon atoms or a substituted or unsubstituted aryl group;

Electrically photosensitive materials and elements for

The present invention provides novel composite electrically photosensitive particles. Each of said particle comprises a colorant and a polymeric binder comprising repeating units containing one or more structures selected from the classes consisting of triarylamines; p-aminotetraarylmethanes; 4,4'-bis(p-amino)triarylmethanes; 1,1-bis(p-aminoaryl)isobutanes; 1,1-bis(p-aminoaryl)cyclohexanes; N-alkyl-N,N-diarylamines; N,N-dialkyl-N-arylamines and heterocyclic nitrogen compounds having about 4 to 10 carbon atoms.

Composite electrically photosensitive particles for electrophoretic

In general, materials having the structure ##STR1## wherein A represents phenylene, napthylene, anthracenediyl, and dibenzothien-diyl;

Electrophoretic migration imaging process

Compounds selected from the group consisting of (a) aromatic amines having a p-alkyl, p-alkoxy or p-alkoxycarbonyl substituent on the aromatic group, (b) aromatic alkanes, isoalkanes and cycloalkanes, having at least two aromatic groups with at least one aromatic group having an amino substituent, (c) dialkylarylamines having a pyranylalkenyl, a quinolinylalkenyl or a arylazo substituent on the aryl group, (d) a julolidine and (e) a isobenzofuran are useful as sensitizers in electrophoretic migration imaging dispersions and processes.

Sensitizer for electrophoretic migration imaging dispersions

In general, materials having the structure ##STR1## wherein n equals 1 or 2;

Electrophoretic migration imaging dispersion

An improved electrophoretic migration imaging process is disclosed wherein the improvement comprises the use of electrically photosensitive particles containing a colorant having an absorption maximum greater than about 410 nm. and having the formula: ##STR1## wherein n represents 0 or 1; m represents 1 or 2; Ar represents an aromatic group; Z represents the nonmetallic atoms to complete an aromatic group; and each of R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 represents hydrogen, nitro, cyano, halogen, or one of various specified organo groups.

A multi-active photoconductive insulating element having at least two layers comprising an aggregate photoconductive layer in electrical contact with a photoconductor containing layer. The aggregate photoconductive layer comprises at least one compound having the structure: ##STR1## in which Ar represents a substituted or unsubstituted arylene group, wherein said substituent is an electron accepting or an electron withdrawing group;

Multi-active photoconductive elements

In general, materials having the structure ##STR1## WHEREIN N EQUALS 1 OR 2;

A multi-active photoconductive insulating element having at least two layers comprising an aggregate photoconductive layer in electrical contact with a photoconductor containing layer. The aggregate photoconductive layer comprises at least one compound having the structure: ##STR1## wherein A represents: ##STR2## in which R.sub.1, R.sub.2, R.sub.3, and R.sub.4, which may be the same or different, represent a substituted or unsubstituted alkyl group having from 1 to 18 carbon atoms or a substituted or unsubstituted aryl group; R.sub.5 and R.sub.6, which may be the same or different, represent an electron withdrawing group, phenyl or substituted phenyl; R.sub.7 and R.sub.8, which may be the same or different represent an electron withdrawing group or hydrogen except that when Ar is unsubstituted phenylene or unsubstituted anthrylene, R.sub.7 and R.sub.8 must be other than hydrogen; R.sub.11 is an electron withdrawing group; Ar represents a substituted or unsubstituted arylene group, wherein said substituent is an electron accepting or an electron withdrawing group.

Growing community of inventors

Rochester, NY, United States of America

Hal E Wright