Label sensing mechanism with two optical sensors and different sensing modes for detecting label position, preprinted marks on label liners and preprinted marks on labels

摘要

A label sensing mechanism for a printer mechanism is provided. The label sensing mechanism may comprise a first optical sensor and a second optical sensor disposed opposite one another, each of the first optical sensor and the second optical sensor may comprise an emitter and a detector. The first optical sensor and the second optical sensor may be positioned on either side of a paper path along which label liner bearing labels to be printed travels. The first optical sensor and the second optical sensor may be operable together or separately in order to detect label position, preprinted marks on the label liner, and preprinted marks on the labels. A method for sensing labels using such a label sensing mechanism and a printer having such a label sensing mechanism are also provided.