Method and apparatus for discriminating printings
AssigneeRicoh Company, Ltd.
InventorsHisashi Shoji, Morio Onoe, Tadashi Saito, Takeshi Takemoto, Takashi Kimura
Life of this patent
Estimating the term…
Abstract
In a method and an apparatus for discriminating real securities from copies thereof produced by an electrophotographic copier using a toner, a heating member heated to a temperature above 50.degree. C. and below 250.degree. C. is brought into contact with a printing to see if an image on the printing changes or if any deposit is present on the heating member. Whether or not the image of the printing is formed by a toner whose major component is a thermoplastic resin, is determined on the basis of the result of the above decision.
Claims45
A method of determining whether or not an image printed on a printing is formed by a coloring agent whose major component is a thermoplastic resin, said method comprising the steps of:
- (a) heating said printing at a predetermined temperature;
- (b) detecting a change in said printing;
- and
- (c) determining, based on the detected change of said printing, whether or not the image of said printing is formed by said coloring material.
An apparatus for determining whether or not an image printed on a printing is formed by a coloring agent whose major component is a thermoplastic resin, said apparatus comprising:
- heating means for heating the printing at a predetermined temperature;
- detecting means for detecting a change in the printing heated by said heating means;
- and
- decision means for determining, based on the change in the printing, whether or not the image of the printing is formed by said coloring agent.
An apparatus for determining whether or not an image printed on a printing is formed by a coloring agent whose major component is a thermoplastic resin, said apparatus comprising:
- a portable casing;
- a heating member mounted on a surface of said casing;
- a control circuit built in said casing for controlling a surface temperature of said heating member to a predetermined temperature;
- a switch for selectively turning on or turning off power supply to said control circuit;
- and
- pressing means for pressing the printing against a surface of said heating member;
- wherein said pressing means presses the printing against the surface of said heating member to heat said printing to thereby determine at least one of a change in said printing and whether or not a deposit come off said printing and deposited on said heating member is present, and whether or not the image of said printing is formed by said coloring agent is determined on the basis of a result of the above decision.
An apparatus for determining whether or not an image printed on a printing is formed by a coloring agent whose major component is a thermoplastic resin, said apparatus comprising:
- a unit capable of being combined with a cash register or similar equipment;
- a heating member mounted on one surface of said unit;
- a control circuit built in said unit for controlling a surface temperature of said heating member to a predetermined temperature;
- a switch for selectively turning on or turning off power supply to said control circuit;
- and
- pressing means for pressing the printing against the surface of said heating member;
- wherein said pressing means presses the printing against the surface of said heating member to heat said printing to thereby determine at least one of a change in said printing and whether or not a deposit come off said printing and deposited on said heating member is present, and whether or not the image of said printing is formed by the coloring agent is determined on the basis of a result of the above decision.
An apparatus for determining whether or not an image printed on a printing is formed by a coloring agent whose major component is a thermoplastic resin, said apparatus comprising:
- a tubular portable casing;
- a heating member affixed to one end of said casing such that a surface of said heating member appears at said one end of said casing;
- a control circuit built in said casing for controlling a surface temperature of said heating member to a predetermined temperature;
- and
- a switch for selectively turning on or turning off power supply to said control circuit;
- wherein the printing is pressed against and heated by the surface of said heating member to thereby determine at least one of a change in said printing and whether or not a deposit come off said printing and deposited on said heating member is present, and whether or not the image of said printing is formed by the coloring agent is determined on the basis of a result of the above decision.
Dependencies are inferred from the claim text.