Abstract: In order to reuse print sheets, a region on a printed sheet where old information is printed is detected and a region corresponding to the region where the old information is printed is identified as an erasing region. A pattern corresponding to the erasing region is printed on the erasing region with erasing ink or toner, which has a different color from a color of printing ink or toner, whereby the printed old information is erased. Then, new information is printed on the print sheet, from which the old information has been erased, by use of the printing ink or toner.

Abstract: In order to reuse print sheets, a region on a printed sheet where old information is printed is detected and a region corresponding to the region where the old information is printed is identified as an erasing region. A pattern corresponding to the erasing region is printed on the erasing region with erasing ink or toner, which has a different color from a color of printing ink or toner, whereby the printed old information is erased. Then, new information is printed on the print sheet, from which the old information has been erased, by use of the printing ink or toner.

Abstract: The present invention provides a process for automatically generating information including a purchase order for a depleted item after sensing that the amount of the item in stock is less than a pre-specified amount. The purchase order is created using a predetermined form and attached to an e-mail. The e-mail carries the purchase order to an approver if needed or, alternatively directly to a supplier. The function is carried out either by the machine that is using the item or by a separate computer in communication with the machine.