Method for preparing a plastic relief printing plate
Patent 3931762 Issued on January 13, 1976. Estimated Expiration Date: 
January 13, 1993. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
January 13, 1993. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesInventorsAssigneeApplicationNo. 05/424765 filed on 12/14/1973US Classes:101/401.1, Blanks and processes101/493, Resilient surface156/78, Foaming252/513, Iron group metal (iron, cobalt, nickel)252/519.33, The organic compound is a polymer264/220, Utilizing surface to be reproduced as an impression pattern264/321, Sponge-like or foamed work264/45.9, Including extrusion264/53, Liquid to gas phase change264/54, Chemical blowing521/91, Ingredient contains a silicon atom521/92Ingredient contains a metal atomExaminersPrimary: Whitby, Edward G.Attorney, Agent or FirmInternational ClassesB41C 3/00 (20060101)B41C 3/06 (20060101) B41N 1/12 (20060101) B41D 003/04 () Foreign Application Priority Data1972-12-18 JA 47-127452AbstractWhen 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 ≤ 4 and which satisfies the relation 130 ≥ 20a + b ≥ 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. | |
