US 11,230,123 B2 · Printer for security paper

Abstract

A printer for security paper, such as a multifunction printer, a printer, a facsimile machine or a copier, is configured to perform a printing operation by distinguishing between security paper and normal paper. The printer for security paper includes: a security paper sensor disposed on a printing paper feeding path; and a control unit for comparing a first sensing value sensed by the security paper sensor when printing paper to be determined is not present near the security paper sensor with one or more second sensing values sensed by the security paper sensor for the corresponding printing paper on the feeding path, during the course of conveying the corresponding printing paper on the feeding path, determining printing paper as security paper when a comparison value is above a predefined reference value, and determining printing paper as normal paper when the comparison value is below the predefined reference value.

Claims8

Dependent claims

A printer for security paper, comprising:

a security paper sensor disposed on a printing paper feeding path;
a switch provided between a printer engine controller and a KCMY LED head or a laser scanner unit (LSU), for on/off switching a connection between the printer engine controller and the KCMY LED head or the laser scanner unit (LSU);
and
a controller for determining whether printing paper on the feed path is security paper or normal paper, based on sensing values from the security paper sensor, wherein when printing paper is determined as security paper, the controller turns on the switch to connect the KCMY LED head or the laser scanner unit (LSU) to the printer engine controller so that the printing operation proceeds, and when printing paper is determined as normal paper, the controller turns off the switch to disconnect the KCMY LED head or the laser scanner unit (LSU) to the printer engine controller so that the printing operation does not proceed.

1 more element

An apparatus separately installable in a printer including a plurality of sensors provided on a printing paper feeding path for determining a position of the printing paper on the feeding path, a KCMY LED head or a laser scanner unit (LSU) and a printer engine controller for receiving signals from the plurality of sensors and transmitting a printing data to the KCMY LED head or the laser scanner unit (LSU), comprising:

a switch provided between the printer engine controller and the KCMY LED head or the laser scanner unit (LSU), for on/off switching a connection between the printer engine controller and the KCMY LED head or the laser scanner unit (LSU);
and
a controller configured to control the switch, based on its judgment, wherein the controller turns on the switch to connect the KCMY LED head or the laser scanner unit (LSU) to the printer engine controller so that the printing operation proceeds, or the controller turns off the switch to disconnect the KCMY LED head or the laser scanner unit (LSU) to the printer engine controller so that the printing operation does not proceed.

Dependencies are inferred from the claim text.

Printer for security paper

Life of this patent

Printer for security paper

Life of this patent

Abstract

Claims8