EP 0222184 A1 19870520 - Stitched valve bag and procedure for making same.
Title (en)
Stitched valve bag and procedure for making same.
Title (de)
Genähter Ventilsack und Verfahren zu dessen Herstellung.
Title (fr)
Sac à valve cousu et son procédé de fabrication.
Publication
Application
Priority
FI 854058 A 19851017
Abstract (en)
The invention concerns a stitched valve bag and a procedure for manufacturing stitched valve bags from a material web run in tubular form. The valve bag (30) is provided at both ends with a stitched seam (38), and the bag (30) has in one corner a valve member (34') constituting a valve opening. In the longitudinal direction of the mantle part (31) of the bag (30) has at one end (32) at a distance from the corner of the bag been made an incision (36) longitudinal to the mantle (31). The portion between the incision (36) and the corner has been folded to become a valve member (34'), along a folding line (35) extending substantially from the bottom of the incision (36) obliquely to the margin of the mantle part (31). On the side beyond the incision (36) the bag end (32) has for improved strength been folded double before stitching said end of the bag.
IPC 1-7
IPC 8 full level
B65D 30/00 (2006.01); B65D 30/24 (2006.01)
CPC (source: EP)
B65D 31/142 (2013.01)
Citation (search report)
- [A] FR 971464 A 19510117
- [A] GB 1239054 A 19710714
- [A] GB 1588042 A 19810415 - SHOWA SEITAI MFG
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI LU NL SE
DOCDB simple family (publication)
EP 0222184 A1 19870520; EP 0222184 B1 19890510; AT E42938 T1 19890515; DE 3663245 D1 19890615; FI 71532 B 19861010; FI 71532 C 19870119; FI 854058 A0 19851017; SU 1449009 A3 19881230
DOCDB simple family (application)
EP 86114154 A 19861013; AT 86114154 T 19861013; DE 3663245 T 19861013; FI 854058 A 19851017; SU 4028438 A 19861016