发明名称 |
ENVELOPE FOR TRANSPARENCY |
摘要 |
An improved envelope for transparencies for overhead projectors comprising a substantially rectangular pocket made of a transparent sheet material, the pocket having two longitudinal side edges connected by shorter side edges, and being open at least along one side edge for insertion of a transparency, at least one opaque flap attached in a foldable manner along one of the side edges by means of a flexible adhesive tape, the tape comprising a flexible polyester backing having a thickness of from 5 to 15 micrometers, and coated on one surface of the backing is an adhesive layer, wherein the tape has a flexibility measurement of about 1.8 grams, and the flap is capable of remaining in the unfolded position on an overhead projector stage with minimal adhesive transfer at the operating temperature of the overhead projector. |
申请公布号 |
WO9423336(A1) |
申请公布日期 |
1994.10.13 |
申请号 |
WO1994US01982 |
申请日期 |
1994.02.22 |
申请人 |
MINNESOTA MINING AND MANUFACTURING COMPANY |
发明人 |
KIEHNE, DOUGLAS, A.;LUTHY, KENNETH, W.;QUAN, NANCY, N. |
分类号 |
C09J121/00;G03B21/132;G03B21/64;(IPC1-7):G03B21/132 |
主分类号 |
C09J121/00 |
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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