公开(公告)号：JPH07219186A

公开(公告)日：1995-08-18

申请号：JP13542594

申请日：1994-06-17

Applicant: BASF MAGNETICS GMBH

Inventor： HERUMUUTO SHIYUTAININGAA ,  PEETAA HAIRUMAN ,  GEERUHARUTO PURAZONITSUKU

IPC: G03G21/04 ,  B29D7/01 ,  B29D11/00 ,  B41M3/14 ,  B41M7/00 ,  B44F1/12 ,  C09J7/02 ,  C09J111/00 ,  C09J133/00 ,  C09J153/02 ,  G03C5/08 ,  G03C11/08

Abstract: PURPOSE: To make an anti-copy film only cover part of a document to be covered by making the size of the film smaller than the preset size of the document. CONSTITUTION: An anti-copy film is put on the entire or partial surface of a document 2 to be covered, comprises a transparent film material, and entirely or partially contains a film 3 in which opaque or reflecting sections 5 are regularly arranged in the thickness direction of the film material. Because of the opaque or reflecting sections 5, the film becomes opaque when the film is looked from the perpendicular direction 6 corresponding to the copying direction and transparent from an oblique direction corresponding to the direction 7 of the field of view like as the adjustable rolling-up blind. This anti-copy film is manufactured in a size smaller than the size of the document 2 so that the film can be used over a wide extent and can be handled easily. Therefore, a limited part, such as the column section, line section, address section, etc., of the document can be made uncopiable.