EP 0037343 B1 19841003 - METHOD OF MANUFACTURING A PILE SUITABLE FOR FORMING AT LEAST ONE EXPANSIBLE FILE, AND MACHINE FOR EXECUTING THE METHOD
Title (en)
METHOD OF MANUFACTURING A PILE SUITABLE FOR FORMING AT LEAST ONE EXPANSIBLE FILE, AND MACHINE FOR EXECUTING THE METHOD
Publication
Application
Priority
FR 8007140 A 19800331
Abstract (en)
[origin: US4425111A] The invention concerns expanding files. A flat strip of flexible material (12) is progressively folded longitudinally to form a U-shaped channel. A length of the material equivalent to the developed width of a gusset is drawn forward. A precut partition with glued tabs (113) is placed at the rear of the drawn forward section of material. A fold is formed by pushing the three edges of the channel inwardly. This sequence of operations is repeated to form a multiplicity of pockets, comprising a plurality of parallel partitions joined along three edges to constitute respective filing pockets by the flexible material which is concertina-folded to constitute respective gussets. This multiplicity of pockets may be sectioned to provide separate expanding files. The invention comprises the manufacturing method and the machine for implementing same.
IPC 1-7
IPC 8 full level
B42F 7/00 (2006.01); B31B 45/00 (2006.01); B31B 50/00 (2017.01); B31D 5/04 (2006.01); B42F 7/08 (2006.01)
CPC (source: EP US)
B42F 7/08 (2013.01 - EP US); Y10S 493/918 (2013.01 - EP US); Y10S 493/94 (2013.01 - EP US); Y10S 493/947 (2013.01 - EP US)
Designated contracting state (EPC)
BE DE GB IT NL SE
DOCDB simple family (publication)
EP 0037343 A2 19811007; EP 0037343 A3 19811028; EP 0037343 B1 19841003; DE 3166406 D1 19841108; FR 2479099 A1 19811002; FR 2479099 B1 19860912; JP S56151546 A 19811124; JP S5953175 B2 19841224; US 4425111 A 19840110
DOCDB simple family (application)
EP 81400516 A 19810331; DE 3166406 T 19810331; FR 8007140 A 19800331; JP 4712681 A 19810330; US 24472681 A 19810317