(19) |
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(11) |
EP 0 261 780 A3 |
(12) |
EUROPEAN PATENT APPLICATION |
(88) |
Date of publication A3: |
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19.07.1989 Bulletin 1989/29 |
(43) |
Date of publication A2: |
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30.03.1988 Bulletin 1988/13 |
(22) |
Date of filing: 05.08.1987 |
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(51) |
International Patent Classification (IPC)4: A63F 3/06 |
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(84) |
Designated Contracting States: |
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DE FR GB IT |
(30) |
Priority: |
22.08.1986 US 899424
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(71) |
Applicant: MINNESOTA MINING AND MANUFACTURING COMPANY |
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St. Paul,
Minnesota 55133-3427 (US) |
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(72) |
Inventor: |
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- Relyea, Keith E. Minnesota Mining and
St. Paul
Minnesota 55133-3427 (US)
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(74) |
Representative: Baillie, Iain Cameron et al |
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c/o Ladas & Parry
Altheimer Eck 2 80331 München 80331 München (DE) |
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Remarks: |
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The title of the invention has been amended (Guidelines for Examination in the EPO,
A-III, 7.3). |
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(57) A sheet is provided which upon abrasion of one surface will reveal a preprinted message
without removal of an opaque cover layer.