EP 1046590 A1 20001025 - Gusseted bag
Title (en)
Gusseted bag
Title (de)
Seitenfaltenbeutel
Title (fr)
Sachet à soufflets
Publication
Application
Priority
EP 99303064 A 19990420
Abstract (en)
A method of forming a gusseted bag, in which a flattened tube with opposed side gussets is formed and the bottom of the tube is closed such that it will create four interior recesses between the closed bottom and trapped folded regions of said side gussets. An adhesive is selectably provided at appropriate parts (56,58,60,62) of the bag material prior to the formation of the flattened gusseted tube such that during or after the gusseting step, the surfaces defining at least parts of the four interior recesses of the bag become secured together so as effectively to close these recesses and prevent significant ingress of bag contents thereto. <IMAGE> <IMAGE>
The method involves folding the paper sheet containing the paper blank and applying paper glue at appropriate parts of the paper to form a partial tube. The partial tube is then passed between groups of creasing wheels which form the side gussets (14a,b). Each gusset forms two rough folds (22a-22d) and are secured by paper glue to the base part (28) of the bag so as to avoid the formation of internal recesses.
IPC 1-7
IPC 8 full level
B65D 30/20 (2006.01)
CPC (source: EP)
B65D 31/10 (2013.01)
Citation (applicant)
"Paper Sacks: A Users Guide", June 1995, ETAPS, EDINBURGH, GB
Citation (search report)
- [X] US 4526565 A 19850702 - HUMMEL JOHN E [US], et al
- [X] US 4691374 A 19870901 - WATKINS JAMES D [US], et al
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB IE IT LI NL PT SE
DOCDB simple family (publication)
DOCDB simple family (application)
EP 99303064 A 19990420