Glow-in-the-dark book

• US 5,695,218 A
• Filed: 05/12/1995
• Issued: 12/09/1997
• Est. Priority Date: 05/12/1995
• Status: Expired due to Term

• Current Assignee: Nicosia, Davide
• Original Assignee: Nicosia, Davide
• Inventors: Nicosia, Davide
• Primary Examiner(s): Fridie, Jr., Willmon
• Application Number:
  US08/437,416
• Time in Patent Office: 942 Days
• Field of Search: 281/51, 281/38, 40/542, 40/541, 40/544, 283/63.1, 283/92, 283/117, 283/95
• US Class Current: 281/38
• CPC Class Codes: B42D 1/008 Sheet materials

Abstract

A glow-in-the dark book which contains at least one composite predetermined sheet and phosphorescent material. The phosphorescent material has the ability to glow in the dark after the glow-in-the dark book is subjected to a light source. The glow-in-the dark book can glow in the dark after only a one step exposure process.

Claims

1. A glow-in-the-dark book comprising:

a) a plurality of sheets;

b) phosphorescent material disposed upon at least some of said sheets, wherein said phosphorescent material can be activated by radiant energy to glow in the dark;

c) each of said sheets with phosphorescent material having two sides and being substantially light-transmitting so as to permit said phosphorescent material to be activated by radiant energy received at either of said two sides; and

a holding device for holding said plurality of sheets together;

wherein said phosphorescent material on all of said sheets with phosphorescent material can be simultaneously activated, with said sheets held together by said holding device, by a single exposure of radiant energy.

2. A glow-in-the-dark book as in claim 1, wherein said holding device is a binding which holds said plurality of sheets together to form a book.

3. A glow-in-the-dark book as in claim 2,

wherein said phosphorescent material on each of said sheets is in the form of indicia which can be distinguished in the dark when activated, and

wherein said sheets are substantially translucent,

whereby said indicia on a given sheet within said book can be activated by radiant energy with said book closed, but cannot be distinguished unless said given sheet is exposed to view.

4. The glow-in-the-dark book of claim 1, wherein said at least one sheet is made of polyvinyl chloride.

5. The glow-in-the-dark book of claim 1, wherein said phosphorescent material comprises a matrix material which is water soluble.

6. The glow-in-the-dark book of claim 1, wherein said phosphorescent material comprises a matrix material which is self-expandable in water.

7. The glow-in-the-dark book of claim 1, wherein said phosphorescent material is in the form of indicia.

8. The glow-in-the-dark book of claim 7, wherein said indicia are selected from the group consisting of pictures, letters, numbers, images and artwork.

9. The glow-in-the-dark book of claim 6, wherein said phosphorescent material has a particle size in the range of 2 to 20 microns in diameter.

10. The glow-in-the-dark book of claim 9, wherein said phosphorescent material has a particle size between about 2 to about 20 microns dispersed in matrix material and the ratio of phosphorescent material to matrix material is in the range of 20:

1 to 60;

1.

11. The glow-in-the-dark book of claim 1, wherein said phosphorescent material is a phosphorescent zinc sulfide.

12. A glow-in-the-dark book as in claim 1, wherein said radiant energy is selected from the group consisting of incandescent light, daylight, and ultraviolet light.

13. A glow-in-the-dark book as in claim 1, wherein said phosphorescent material is disposed within said sheet.

14. A glow-in-the-dark book as in claim 13, wherein said phosphorescent material is disposed on a surface of said sheet.

15. A glow-in-the-dark book as in claim 1, wherein said phosphorescent material is disposed on a surface of said sheet.

16. A glow-in-the-dark book as in claim 1, wherein said sheet is substantially transparent.

17. A glow-in-the-dark book as in claim 1, wherein said sheet is substantially translucent.

18. A glow-in-the-dark book comprising:

a plurality of sheets, at least some of which having indicia thereon, said indicia comprising a phosphorescent material which can be activated by radiant energy to glow in the dark;

a holding device which holds said plurality of sheets together; and

said sheets being substantially open to radiant energy and being substantially light-transmitting so that all of said indicia can be activated simultaneously by a single exposure of radiant energy.

19. A glow-in-the-dark book as in claim 18,

wherein said indicia on each of said sheets can be distinguished in the dark when activated, and

wherein said sheets are substantially translucent,

whereby said indicia on any given one of said sheets can be activated by radiant energy while said sheets are held together, but cannot be distinguished unless said given sheet is exposed to view.