This invention relates to an ink jet printing head comprising in combination a thermal head having a plurality of thermal dot elements, a guide member having a plurality of grooves corresponding to the thermal dot elements respectively and being in contact with the thermal head, and an ink supplying...http://www.google.com/patents/US4916468?utm_source=gb-gplus-sharePatent US4916468 - Movable ink jet thermal printing head to prevent ink stoppage
