Thermal Printer Employing Heat Sink to Enhance Lift-Off Correction
Original Publication Date: 1983-Dec-01
Included in the Prior Art Database: 2005-Feb-08
A thermal printer 11 effects printing by injecting current into a conductive ribbon 13 from a printhead 15 having plural print electrodes mounted thereon. The injected current effects localized heating, causing ink on the surface 17 of the ribbon 13 to melt and transfer to a document 19. As printing occurs, the printhead is relatively moved with respect to the document 19, thus forming complete characters of printing. In order to remove previously printed characters, less current is injected into the ribbon 13, causing its ink surface 17 at the print point to tackify and bond to the ink on the document 19. It is necessary for the ribbon to thereafter cool in order that the previously printed ink might adhere to the ribbon and be removed from the document 19 upon separation of the ribbon 13 from the document 19.