Electrothermal printing apparatus.

摘要

An electrothermal printer uses heat-developable strip (16) which is held on a sector of rotating platen (12) by an endless loop (30) passing over two rollers (22,24). A stylus assembly (40) between the roller (22,24) can pass current via selected styli through parts of the loop (30). The loop (30) has an outer electrically conductive layer and an inner electrically conductive and resistive layer which is contacted by the styli and is locally heated by the current flow. The loop (30) and paper (16) are in contact and move in synchronism over a common path section, when heat generated in the loop (30) transfers to and heat-develops the paper.