Abstract: A printer provided with a printer controller and a printer engine, wherein the printer controller includes a user interface control unit with a function for grouping together parameters associated with the paper, overlay and so on and recording this group of parameters under a desired name.

Abstract: A printer system includes a plurality of printing mechanisms, a paper inversion mechanism that inverts a paper between the printing mechanisms, a paper buffer that adjusts a time lag in a synchronous operation, and a controller that receives print data from a host computer and synchronously operates the printing mechanisms to perform double-strike or double-sided printing. Preferably, the controller includes a unit that measures a length of a paper path extended between the printing mechanisms and enters a setup value to perform error recovery printing, an image buffer that stores an amount of data equivalent to a distance between an image transfer point and a fixing point, a pointer function that indicates locations of image data and of data in the image buffer, and a function that employs the pointer function to calculate a range and performs error recovery printing, when a malfunction has occurred and a paper is re-loaded.

Abstract: A printer provided with a printer controller and a printer engine, wherein the printer controller includes a user interface control unit with a function for grouping together parameters associated with the paper and recording this group of parameters under a desired name.