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US 4,656,469 AGranted
Activated work and method of forming same
OwnerEarl H. Oliver, Alfred E. Hall +1inventors
InventorsEarl H. Oliver, Alfred E. Hall, John L. Sigalos
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Abstract
The present invention relates to a novel and unique activated work such as a child's book or a greeting card having at least two turnable pages in juxtaposed relationship and which is formed having a portion thereof that is essentially invisible in a first state but visible in a second state. Electrical signals are coupled to the second portion for selectively and reversibly changing the second portion from the invisible to the visible state when the pages are moved from their juxtaposed relationship.
Claims15
An activated work comprising:
- a. at least two turnable, juxtaposed pages,
- b. at least one of said juxtaposed pages having a picture of a first scene on a side facing another page,
- c. a second scene added to and interposed with said first scene, said second scene comprising areas thereof which are formed of a material having variable electromagnetic radiation absorption characteristics and being essentially invisible in a first state and visible in an electrically changed second state,
- d. means on said work for producing an electrical signal when said one page is turned from its juxtaposed relationship with said other page, and
- e. means for coupling said electrical signal to said areas of said second scene only by turning said one page from its juxtaposed relationship with said other page such that said areas of said second scene are independently, distinctly and reversibly changed from said invisible state to said electrically changed visible state.
2 more elements
Dependencies are inferred from the claim text.