METHOD OF MANUFACTURING COUNTERFEIT PREVENTION PAPER

Title:

METHOD OF MANUFACTURING COUNTERFEIT PREVENTION PAPER

Document Type and Number:

WIPO Patent Application WO/2000/073583

Kind Code:

A1

Abstract:

A method of manufacturing window opening thread-contained paper of which threads are exposed to intermittently formed window opening parts capable of using a device which has window opening parts with clear profile to which threads are assuredly exposed so that the threads are visible clearly and which is rather simple in structure, wherein a wet paper (1) with threads (T) buried in a paper layer is fitted closely and led to a center roll (3) with projections (2) disposed intermittently on the surface thereof at specified intervals and the surface of the wet paper on the projections is passed while being rubbed by an abrasively passing roll (4) so as to move fibers on the surface of the wet paper on the projections in order to form the exposed portion of the threads intermittently on the surface of the wet paper, and then the wet paper is dried using a normal method.

Inventors:

MURAKAMI TORU (JP)
SUYAMA MASAAKI (JP)

Application Number:

PCT/JP2000/003295

Publication Date:

December 07, 2000

Filing Date:

May 23, 2000

Export Citation:

Click for automatic bibliography generation Help

Assignee:

TOKUSHU PAPER MFG CO LTD (JP)
MURAKAMI TORU (JP)
SUYAMA MASAAKI (JP)

International Classes:

D21F11/00; G03G21/04; D21H21/40; D21H21/42; (IPC1-7): D21H21/42

Foreign References:

JPH06272200A	1994-09-27
EP0195887A2	1986-10-01

Other References: