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1. 发明授权

US3094620A Copy-sheet and method 失效
标题翻译：复印件和方法
公开(公告)号：US3094620A
公开(公告)日：1963-06-18
申请号：US7999161
申请日：1961-01-03
申请人： MINNESOTA MINING & MFG
发明人： REITTER JOHN L
IPC分类号： B41M5/32 , G03C1/498
CPC分类号： G03C1/4989 , B41M5/32
摘要： 997, 362. Thermographic copying material and process. MINNESOTA MINING & MANUFACTURING CO. Jan. 3,1962 [Jan. 3,1961], No. 10700/65. Divided out of 997,361. Heading G2C. A copy sheet or copysheet combination, which forms a visible image when heated but can be desensitized by exposure to ultra-violet radiation, contains (1) a normally solid organic salt of nickel, cobalt or copper and (2) N, N 1 -bis-furfuryl-dithiooxamide or N, N 1 -bis-carboxyamyl-dithiooxamide. Copies may be made by placing an original in contact with the copy sheet or combination, irradiating with infra-red while in contact, and subsequently desensitizing the copy by exposure to ultraviolet, or by exposing a copy sheet to ultra-violet through a transparent original bearing opaque markings, and subsequently heating to develop colour in the areas not so desensitized. The two reagents may be disposed in a single layer, in separate layers on a single carrier, or in separate layers on separate carriers. The reagent (1) may be nickel stearate or behenate. The reagents may be dispersed in a thin film of a resinous or polymeric film-forming binder in the form of a self-sustaining film, or as a coating on a backing of film, paper or the like. The Specification includes a list of suitable binders. The sheets may also include pigments, fillers, plasticizers, dyes, waxes and resins.

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