US 5,667,317 AGranted

Fluorescent security system for printed transaction records

AssigneeNCR Corporation

InventorYaoping Tan

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Abstract

A fluorescent security system for retail transactions which maximizes the printed character or image life of a combination visible/fluorescent inked printing ribbon while ensuring that the fluorescent security life of the combination visible/fluorescent inked printing ribbon will outlast the visible life for printed characters or images under normal lighting conditions. This fluorescent security system for transaction records consists of a fabric ribbon, a dual-roll foam reinker and an optical filter. The fabric ribbon is initially inked with fluorescent ink richer in visible color dye than a normal fluorescent ink to enhance the printed character or image life of the combination visible/fluorescent inked printing ribbon. A dual-roll foam reinker consisting of an inner roll and an outer roll positioned concentric to the inner roll is used to replenish ink depleted from the fabric ribbon during the printing process. The inner roll and the outer roll can have the same or different pore sizes.

A combination visible/fluorescent inked printing ribbon cassette for printing transaction records and other documents on printing equipment, said combination visible/fluorescent inked printing ribbon cassette comprising:

a printing ribbon cassette base of generally rectangular configuration having a bottom portion, a front portion, a rear portion, an inlet side portion, an outlet side portion, a continuous or endless printing ribbon storage cavity and an upstanding pin;
a wall extending upwardly from said bottom portion of said printing ribbon cassette base along said front portion, said rear portion, said inlet portion and said outlet portion;
an inlet guide extending outwardly from said front portion along said inlet side portion of said printing ribbon cassette;
an outlet guide extending outwardly from said front portion along said outlet side portion of said printing ribbon cassette;
a continuous or endless visible/fluorescent inked printing ribbon exiting from said printing ribbon cassette through said outlet guide, extending between said outlet guide and said inlet guide, and entering into said printing ribbon cassette through said inlet guide;
a printing ribbon drive gear mechanism for moving said continuous or endless visible/fluorescent inked printing ribbon from said inlet guide into said printing ribbon storage cavity in said printing ribbon cassette base;
a reinking device rotatably mounted on said upstanding pin on said printing ribbon cassette base, said reinking device including an inner cylindrical ink roll saturated with a first ink and an outer cylindrical ink roll saturated with a second ink, said outer cylindrical ink roll concentrically positioned around said inner cylindrical ink roll;
said first ink is richer in fluorescent dye or pigments than in visible color dye or pigments and said second ink is richer in visible color dye or pigments than in fluorescent dye or pigments;
and
said inner cylindrical ink roll and said outer cylindrical ink roll rotate in response to linear movement of said continuous or endless visible/fluorescent inked printing ribbon and said first and second inks are transferred from said outer cylindrical ink roll to said continuous or endless loop visible/fluorescent inked printing ribbon.

7 more elements

Abstract

Claims18