Patent ID: 9296236
Filing Date: 2016-03-29
CPC Classification: B41J

Claim Text:
1. A printer apparatus, comprising: a paper conveyance path configured to convey a paper; a carrier configured to move in a direction orthogonal to a conveyance direction of the paper to be conveyed on the paper conveyance path; a dot matrix print head configured to include head pins arranged in the carrier; an ink ribbon cassette in which an ink ribbon is arranged; a photo sensor configured to be arranged at the external side of the movement direction of the carrier in the printing area of paper and at the downstream side in the paper conveyance direction of the dot matrix print head; a concentration detection pattern printing module configured to print a predetermined concentration detection pattern with the head pins; an exchange necessity determination section configured to determine an exchange necessity of the ink ribbon cassette according to a value that is obtained by detecting the printing created by the concentration detection pattern printing module through the photo sensor; and a font changing section configured to change the font to be used in the printing according to the determined result of the exchange necessity determination section.