EP0261780A3 - Hidden image system - Google Patents

Hidden image system Download PDF

Info

Publication number
EP0261780A3
EP0261780A3 EP87306941A EP87306941A EP0261780A3 EP 0261780 A3 EP0261780 A3 EP 0261780A3 EP 87306941 A EP87306941 A EP 87306941A EP 87306941 A EP87306941 A EP 87306941A EP 0261780 A3 EP0261780 A3 EP 0261780A3
Authority
EP
European Patent Office
Prior art keywords
image system
hidden image
hidden
image
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP87306941A
Other versions
EP0261780A2 (en
Inventor
Keith E. Minnesota Mining And Relyea
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
3M Co
Original Assignee
Minnesota Mining and Manufacturing Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Minnesota Mining and Manufacturing Co filed Critical Minnesota Mining and Manufacturing Co
Publication of EP0261780A2 publication Critical patent/EP0261780A2/en
Publication of EP0261780A3 publication Critical patent/EP0261780A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63F—CARD, BOARD, OR ROULETTE GAMES; INDOOR GAMES USING SMALL MOVING PLAYING BODIES; VIDEO GAMES; GAMES NOT OTHERWISE PROVIDED FOR
    • A63F3/00—Board games; Raffle games
    • A63F3/06—Lottos or bingo games; Systems, apparatus or devices for checking such games
    • A63F3/065—Tickets or accessories for use therewith
    • A63F3/0685—Tickets or accessories for use therewith having a message becoming legible after a chemical reaction or physical action has taken place, e.g. applying pressure, heat treatment, spraying with a substance, breaking microcapsules

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Color Printing (AREA)
EP87306941A 1986-08-22 1987-08-05 Hidden image system Withdrawn EP0261780A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US89942486A 1986-08-22 1986-08-22
US899424 1986-08-22

Publications (2)

Publication Number Publication Date
EP0261780A2 EP0261780A2 (en) 1988-03-30
EP0261780A3 true EP0261780A3 (en) 1989-07-19

Family

ID=25410942

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87306941A Withdrawn EP0261780A3 (en) 1986-08-22 1987-08-05 Hidden image system

Country Status (2)

Country Link
EP (1) EP0261780A3 (en)
JP (1) JPS6353091A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5777145A (en) * 1980-10-28 1982-05-14 Usac Electronics Ind Co Ltd Manual feeding mechanism of sheet in printing apparatus
FR2624797B1 (en) * 1987-12-16 1992-03-06 Rebichon Pierre OBJECT SUCH AS A POSTCARD WITH A COLORFUL PRINT
US5261651A (en) * 1991-01-29 1993-11-16 Seiko Epson Corporation Feeding and delivery structure for cutform media in printer
CA2056283A1 (en) * 1991-11-27 1992-05-26 Jacqueline M. Saville Latent image ink
FR2735156A1 (en) * 1995-05-29 1996-12-13 Guyard Pierre Yves Alexandre R NEUTRALIZING WRITING AND PRINTING MEDIUM FOR TRANSPARENCY READING AND METHOD OF MANUFACTURING SAME

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3540914A (en) * 1967-01-30 1970-11-17 Ncr Co Pressure sensitive record sheets employing indole substituted pyromellitides
US3682673A (en) * 1970-04-08 1972-08-08 Minnesota Mining & Mfg Latent imaging or hidden entry system
DE2406911A1 (en) * 1974-02-14 1975-09-04 Pelikan Werke Wagner Guenther Learning aid using multiple choice answer system - with correctness of answer indicated using coated colour-reaction sheet
GB1520919A (en) * 1975-12-15 1978-08-09 Lindselius B A Method of making tickets or other valuable documents for preventing or rendering difficult their improper utilization
US4111462A (en) * 1975-07-15 1978-09-05 Minnesota Mining And Manufacturing Company Latent, sensitizing ink

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3540914A (en) * 1967-01-30 1970-11-17 Ncr Co Pressure sensitive record sheets employing indole substituted pyromellitides
US3682673A (en) * 1970-04-08 1972-08-08 Minnesota Mining & Mfg Latent imaging or hidden entry system
DE2406911A1 (en) * 1974-02-14 1975-09-04 Pelikan Werke Wagner Guenther Learning aid using multiple choice answer system - with correctness of answer indicated using coated colour-reaction sheet
US4111462A (en) * 1975-07-15 1978-09-05 Minnesota Mining And Manufacturing Company Latent, sensitizing ink
GB1520919A (en) * 1975-12-15 1978-08-09 Lindselius B A Method of making tickets or other valuable documents for preventing or rendering difficult their improper utilization

Also Published As

Publication number Publication date
EP0261780A2 (en) 1988-03-30
JPS6353091A (en) 1988-03-07

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Inventor name: RELYEA, KEITH E. MINNESOTA MINING AND