Eastman-kodak Company

Brian H Johnston

Thomas Henry Whitesides

Narasimharao Dontula

Jared B Mooberry

Sundaram Krishnamurthy

Thomas M Smith

Paul R Buckland

Thomas E Gompf

Kenneth N Kilminster

Luba Kordovski

David C Vogel

A method is described for splicing together overlapping ends of first and second lengths of photographic film strips of common film strip width, comprising positioning a bonding element between an overlapping end of the first length of photographic film and a corresponding overlapped end of the second length of photographic film, and heating the bonding element to effect an adhesive bond between such film ends, wherein the bonding element comprises an induction heating receptive support and thermoplastic adhesive layers on each side of the support, and wherein the heating of the bonding element is performed by induction heating. The present invention allows for the preparation of photographic film splices, consisting of either homogeneous or dissimilar film bases, using a bonding element and induction heating to provide smooth yet strong splices. In particular, the invention enables successful splicing of acetate support (e.g., cellulose triacetate (CTA)) based films and polyester support (e.g., polyethylene terephthalate (PET)) based films either to themselves or each other. The invention provides a method of forming composite rolls of motion picture film containing different film bases as well as eliminating the need for emulsion skiving, and the use of toxic, flammable film cements when splicing CTA films.

Induction splicing of photographic film strips

The present invention provides an acetate ester compound of formula (III), ##STR1## a process for synthesizing compound (III), and a process for using that compound to prepare a pyrazolone compound, where the substituent definitions are as defined in the Summary of the Invention.

Acetate ester compounds

Electrostatographic toner materials are disclosed which contains a yellow pigment which is a metal coordination complex having the formula: ##STR1## wherein R is preferably hydrogen, or SO.sub.2 NHR.sup.2 (R.sup.2 being alkyl or aryl), Z is an electron withdrawing group, Z.sup.1 is preferably alkyl, aryl or N(R.sup.3).sub.2 (R.sup.3 being alkyl, aryl or hydrogen), Me is a coordinate metal ion and L is a ligand. These pigments are formulated with fusible polymeric binders to provide a toner which exhibits excellent triboelectric properties and improved yellow color and hue when utilized in the electrostatographic process to produce colored electrophotographic images.

Electrostatographic toner containing yellow pigment

Electrostatographic toner materials containing a cyan pigment which is a metal coordination complex of a substituted 6-heterocycloazo-3-pyridinol compound are disclosed. These pigments are formulated with fusible polymeric binders to provide a toner which exhibits excellent triboelectric properties and improved cyan color and hue when utilized in the electrostatographic process to produce colored electrophotographic images.

Electrostatographic toner containing cyan pigment

Electrostatographic toner materials containing a magenta pigment which is a metal coordination complex of a substituted 6-arylazo-3-pyridinol compound are disclosed. These pigments are formulated with fusible polymeric binders to provide a toner which exhibits excellent triboelectric properties and improved magenta color and hue when utilized in the electrostatographic process to produce colored electrophotographic images.

Electrostatographic toner containing magenta pigment

Novel pyrazolone photographic couplers contain in the coupling position a coupling-off group represented by the formula: ##STR1## wherein: L.sub.1 and L.sub.2 individually are unsubstituted or substituted methylene or ethylene;

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Rochester, NY, United States of America

Brian H Johnston