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:
Jan. 13, 1976
Filed:
Dec. 14, 1973
Nobuo Fukushima, Ibaragi, JA;
Masakazu Inoue, Ibaragi, JA;
Ryouzo Takai, Takatsuki, JA;
Kozo Hotta, Kokubunji, JA;
Sumitomo Chemical Company, Limited, Osaka, JA;
The Yomiuri Shimbun, Tokyo, JA;
Abstract
When a thermoplastic resin sheet such as polyethylene, polypropylene, polystyrene, ABS or polyvinyl chloride resin sheet which contains 0 - 80 % by weight of an inorganic filler and has a foaming ratio (a) of 1 or 1 < a .ltoreq. 4 and which satisfies the relation 130 .gtoreq. 20a + b .gtoreq. 30 (wherein 'a' is the foaming ratio and 'b' is amount of the inorganic filler) is pressed onto a matrix in such a manner that the thickness of said resin sheet before pressing is larger than the thickness of the convex portions of the resultant resin relief plate, thus obtained relief plate has excellent printability.