Patent ID: 8764138

Claim:
A Point of Sale (POS) printer, comprising: a paper tape roller configured to advance or retract a paper tape configured as a paper tape roll, the paper tape having a first side and a second side; a first print head configured to print on the first side of the paper tape; a second print head configured to print on the second side of the paper tape; and a controller configured to: control the first print head and the second print head to print a register receipt on the first side of the paper tape and advertising content on the second side of the paper tape; receive from a POS terminal or a POS computer an End of Transaction (EOT) signal and print instructions used to print the register receipt for a purchase transaction; delay printing the register receipt until expiration of a specified time after receipt by the POS printer of the EOT signal for the purchase transaction; receive second print instructions used to print: (i) the register receipt and (ii) the advertising content from a marketing computer during the delay; and print the register receipt on the first side of the paper tape and the advertising content on the second side of the paper tape based on the second print instructions from the marketing computer instead of the print instructions from the POS terminal or the POS computer.