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:
Aug. 17, 1993
Filed:
Sep. 23, 1991
Tadashi Ishikuro, Kanagawa, JP;
Haruo Masuda, Shizuoka, JP;
Fuji Photo Film Co. Ltd., Kanagawa, JP;
Abstract
A magnetic layer is overlaid on the front surface of a substrate, and a backing layer is overlaid on the back surface of the substrate. The backing layer is formed by the application of a coating composition, which contains inorganic grains and a binder, to the back surface of the substrate. The coating composition is prepared from the steps of kneading a mixture of the inorganic grains and the binder, in which the weight ratio of the inorganic grains to the binder falls within the range of 100:10 to 100:30, in a two-shaft continuous kneading and mixing machine. A dilution kneading process is then carried out on a mixture of the kneaded mixture, which results from the kneading process, and an organic solvent in a two-shaft continuous kneading and mixing machine. Thereafter a dispersion process is carried out on the diluted mixture, which results from the dilution kneading process.