EP 0367520 A3 19910814 - IMPROVEMENTS IN APPARATUS FOR FORMING WATERMARKS IN PAPER
Title (en)
IMPROVEMENTS IN APPARATUS FOR FORMING WATERMARKS IN PAPER
Publication
Application
Priority
GB 8825791 A 19881103
Abstract (en)
[origin: EP0367520A2] A paper machine having an endless foraminous element for engagement with a fibrous web during formation of the web into paper, said element having bonded thereto with flexible bonds, spaced flexible components each representing a surface configuration adapted to generate a watermark in said paper as a result of the engagement of said foraminous element with said web.
IPC 1-7
IPC 8 full level
D21F 1/44 (2006.01); D21H 21/26 (2006.01)
CPC (source: EP)
D21F 1/44 (2013.01)
Citation (search report)
- [Y] DE 620953 C 19351030 - WILMA DOROTHEA SCHUMACHER
- [YD] GB 1447933 A 19760902 - PORTALS LTD, et al
- [Y] DE 2007455 A1 19700910
- [Y] US 1616222 A 19270201 - HARRIGAN HERMAN R
- [Y] GB 1220070 A 19710120 - HOKKAI SEISHI KABUSHIKI KAISHA [JP]
- [A] GB 2149827 A 19850619 - MEAD CORP
- [A] US 1575518 A 19260302 - ALBERT ALLEN
- [A] CH 244613 A 19460930 - REINHARDT ERWIN [CH]
Designated contracting state (EPC)
BE DE ES FR GB IT
DOCDB simple family (publication)
EP 0367520 A2 19900509; EP 0367520 A3 19910814; CA 2002118 A1 19900503; FI 895204 A0 19891101; GB 8825791 D0 19881207; JP H02169791 A 19900629
DOCDB simple family (application)
EP 89311148 A 19891027; CA 2002118 A 19891102; FI 895204 A 19891101; GB 8825791 A 19881103; JP 28725789 A 19891102