A label printer includes a thermal print head assembly for printing pressure sensitive adhesive-backed labels spaced longitudinally on a web. The print head assembly includes a row of heater elements aligned transversely of the web path and movable toward and away from the web, the heater elements being...http://www.google.com.au/patents/US5978004?utm_source=gb-gplus-sharePatent US5978004 - Label printer with label edge sensor
