Improved Reflow Head Design
Original Publication Date: 1989-Sep-01
Included in the Prior Art Database: 2005-Jan-28
Reflow of the ink in certain types of printing and typing ribbon extends the life of the ribbon by distributing the ink from unprinted areas into the printed areas so the ribbon can be printed another time. During reflow the ribbon slides over a head with the ink side contacting a surface of the head which is heated. The reflow head conventionally is a cylindrical shell of copper around a cartridge heater. Attached to the shell is a thermocouple which is used to sense and control the head temperature. It is useful to think of the length of ribbon contact with the head as being divided into three zones. First is the heating zone in which the ribbon is brought up to the temperature of the head as a result of heat transfer from the head.