公开(公告)号：US5666191A

公开(公告)日：1997-09-09

申请号：US25764

申请日：1993-03-03

Applicant: Takanori Hasegawa ,  Noboru Inamine

Inventor： Takanori Hasegawa ,  Noboru Inamine

IPC: B41M3/14 ,  B41M7/00 ,  G03G21/04

CPC classification number: B41M7/00 ,  B41M3/14 ,  Y10S283/902

Abstract: A device for obliterating printed information on a sheet utilizes an information concealing printing unit for printing an information concealing pattern over a surface of a sheet carrying printed information. On printing the information concealing pattern over the surface of the sheet carrying the printed information, the printed information becomes unreadable. Various types of printing devices may be used and the printed information which is obliterated may be first recorded in electronic format for later retrieval.

Abstract translation: 用于在纸张上打印印刷信息的装置利用信息隐藏打印单元，用于在承载打印信息的纸张的表面上打印信息隐藏图案。 在将印刷信息的纸张的表面上印刷信息隐藏图案时，印刷信息变得不可读。 可以使用各种类型的打印装置，并且可以首先以电子格式记录被擦除的打印信息以供稍后检索。