EP 0066469 A1 19821208 - File reinforcements.
Title (en)
File reinforcements.
Title (de)
Blattverstärker.
Title (fr)
Renfort pour feuillets.
Publication
Application
Priority
GB 8116420 A 19810529
Abstract (en)
A file reinforcement used to reinforce the edges of a hole in a document is formed of sheet plastics material. The inner edge 12, which is aligned with the hole in the document, and the outer edge 11, which defines the periphery of the reinforcement, are both formed with an increased thickness compared to the remainder of the reinforcement. The increased thickness edges of the reinforcement are formed by the application of heat and high frequency welding radiation. This increased thickness provides added resistance to tearing where it is needed most. There is also disclosed a file reinforcement which is polygonal rather than the conventional circular shape, and the preferred shape is square.
IPC 1-7
IPC 8 full level
B42F 3/00 (2006.01)
CPC (source: EP)
B42F 3/00 (2013.01)
Citation (search report)
- [Y] GB 1601593 A 19811104 - MARCUS A
- [Y] FR 2091479 A5 19720114 - STEVENS A W J T TOOLS
- [A] FR 1079900 A
- [A] US 3315683 A 19670425 - RODRIGUEZ JOSE M, et al
- [A] US 3473195 A 19691021 - MORIN JOSEPH C
- [A] DE 2512573 A1 19760930 - SIEMENS AG
- [A] US 3925584 A 19751209 - SUZUKI NAGAYUKI, et al
Designated contracting state (EPC)
AT BE CH DE FR GB IT LU NL SE
DOCDB simple family (publication)
DOCDB simple family (application)
EP 82302787 A 19820528