Chemical heat amplification in thermal transfer printing
Patent 4491432 Issued on January 1, 1985. Estimated Expiration Date: 
December 30, 2002. 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.
December 30, 2002. 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 References 1560885 2982619 3744611 Electrophoretical method for selectively reinking resistive ribbon thermal transfer printing ribbons Patent #: 4268368 InventorsApplicationNo. 06/454814 filed on 12/30/1982US Classes:400/241.1, Synthetic material347/199, Electroconductive recording means428/913, MATERIAL DESIGNED TO BE RESPONSIVE TO TEMPERATURE, LIGHT, MOISTURE, ETC.428/914TRANSFER OR DECALCOMANIAExaminersPrimary: Wright, Ernest T. Jr.Attorney, Agent or FirmInternational ClassesB41J 31/02 (20060101)B41J 31/00 (20060101) B41M 5/26 (20060101) AbstractChemical heat amplification is provided in thermal transfer printing, wherein some of the heat necessary for melting and transferring ink from a solid fusible layer in a ribbon to a receiving medium is provided by an exothermic reaction. This chemical reaction is due to an exothermic material that is located in the ink layer, or in another layer of the ink bearing ribbon. The exothermic reaction reduces the amount of the input power which must be applied either electrically or with electromagnetic waves. Examples of suitable exothermic materials are those which will provide heat within the operative temperature range of the ink, and include nonaromatic azo compounds, peroxides, and strained valence compounds, such as monomers, dimers, trimers, of the type which change their chemical bonding when they decompose to either a valence isomer or break into a number of molecular species.Other References
Field of SearchParticular ribbon material | |
