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Current content: 157 337 350 patent documents

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219 431 new documents added

1 247 852 documents amended

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EP 1306484 A2 20030502 - TRACING PAPER

Title (en)

TRACING PAPER

Title (de)

PAUSPAPIER

Title (fr)

PAPIER CALQUE

Publication

EP 1306484 A2 20030502 (EN)

Application

EP 02257231 A 20021017

Priority

GB 0125605 A 20011025

Abstract (en)

A process for modifying natural tracing paper to reduce its susceptibility to cracking on folding comprises the step of treating the paper with an aqueous urea solution of a concentration of at least 40% by weight, preferably about 50% by weight. The treatment is preferably carried out at the size press or bath of the paper machine on which the tracing paper is produced. The urea solution may also contain a surface sizing agent. The resulting treated tracing paper is particularly suitable for the production of envelopes, or packaging for luxury products.

IPC 1-7

D21H 17/07

IPC 8 full level

D21H 27/06 (2006.01); D21H 17/07 (2006.01); D21C 9/00 (2006.01)

CPC (source: EP)

D21H 17/07 (2013.01)

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR

DOCDB simple family (publication)

EP 1306484 A2 20030502; EP 1306484 A3 20040929; GB 0125605 D0 20011219

DOCDB simple family (application)

EP 02257231 A 20021017; GB 0125605 A 20011025