Electrophoretical method for selectively reinking resistive ribbon thermal transfer printing ribbons Patent #: 4268368
ApplicationNo. 06/454814 filed on 12/30/1982
US Classes:400/241.1, Synthetic material347/199, Electroconductive recording means428/913, MATERIAL DESIGNED TO BE RESPONSIVE TO TEMPERATURE, LIGHT, MOISTURE, ETC.428/914TRANSFER OR DECALCOMANIA
ExaminersPrimary: Wright, Ernest T. Jr.
Attorney, Agent or Firm
International 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.
Field of SearchParticular ribbon material