The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 29, 1994
Filed:
Sep. 29, 1992
Steven D Possanza, Penfield, NY (US);
Donald E Eaton, Walworth, NY (US);
Lawrence D Meston, Rush, NY (US);
Edgar P Lougheed, Byron, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
The present invention is a method to add dry gelatin to a photographic emulsion in either a liquid or a solid form. The dry gelatin is added by entraining the dry gelatin in air to form a gaseous mixture of dry gelatin in air and directing this mixture into the solid or liquid photographic emulsion. An air eductor is used to deliver the dry gelatin. When adding dry gelatin to a solution, the rate is determined by the solution viscosity and volume. When adding the dry gelatin to a solid emulsion, the dry gelatin rate is not as critical but uniform addition is still needed to interdisperse the dry gel with the emulsion pellets.