发明名称 |
TRANSPARENT OVERLAY FOR PROTECTING A DOCUMENT FROM TAMPERING |
摘要 |
A transparent overlay that can protect a document from tampering has a transparent cover sheet, a layer of hot-melt adhesive over one surface of the transparent cover sheet, and a polymeric image-receiving layer over the exposed face of said hot-melt adhesive layer. The transparent cover sheet can be a simple thermoplastic film but preferably is retroreflective sheeting which can bear a pattern or legend that is noticeable only when viewed retroreflectively. When the polymeric image-receiving layer is dye-receptive, it can be imaged by using a thermal printing head with a dye-donor element. A preferred polymeric image-receiving layer that is dye-receptive is chlorinated poly(vinylchloride). |
申请公布号 |
CA2023569(A1) |
申请公布日期 |
1991.03.20 |
申请号 |
CA19902023569 |
申请日期 |
1990.08.17 |
申请人 |
MINNESOTA MINING AND MANUFACTURING COMPANY |
发明人 |
FOSSUM, DOUGLAS K.;JONGEWAARD, SUSAN K.;MCCONVILLE, JOHN W. |
分类号 |
G03B27/62;B41M3/14;B41M5/52;B41M7/00;B42D15/00;B42D15/10;B44F1/12;G02B5/128 |
主分类号 |
G03B27/62 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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