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US 6,641,691 B2Granted
Method of making a succession of irreversible thin film displays
AssigneeTimer Technologies, LLC
InventorsMark A. Shadle, David M. Good, Gerrit L. Verschuur, Chauncey T. Mitchell, Jr.
Life of this patent
Estimating the term…
Abstract
Display information is revealed from behind a metal film that can be cleared upon effective contact with a clearing agent. The metal film, while opaque, is generally less than 1000 Angstroms thick and can be cleared by exposure to innocuous agents including food or other household products.
Claims28
A method of making a succession of irreversible displays comprising the steps of:
- printing a graphics layer on an advancing web;
- covering successive portions of the graphics layer with a metal film;
- and
- applying a chemical clearing agent in a succession of patterns out of contact with portions of the metal film that overlie the graphics layer, the clearing agent being relatively movable into contact with the surface of the metal film for inducing a chemical reaction that clears the metal film and reveals the graphics layer.
1 more element
A method of making a succession of irreversible displays comprising the steps of:
- printing a graphics layer on an advancing web;
- covering successive portions of the graphics layer with a metal film;
- laminating another web to the advancing web;
- and
- forming a succession of openings in one of the webs in communication with the metal film for directing a chemical clearing agent through the opening into contact with the metal film, the clearing agent inducing a chemical reaction that clears the metal film and reveals the graphic layer.
2 more elements
A method of forming a succession of irreversible displays comprising the steps of:
- providing a print medium on an advancing web;
- covering successive portions of the print medium with a metal film;
- forming a succession of pathways for conducting a chemical clearing agent to the metal film;
- and
- separating successive portions of the advancing web into a succession of irreversible displays that can be activated by conducting clearing agent along the succession of pathways into contact with the metal film to induce a chemical reaction that clears the metal film and reveals portions of the print medium.
2 more elements
Dependencies are inferred from the claim text.