Apparatus for forming, filling and closing bags
US4129976A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 21, 1977 |
| Grant date | Dec 19, 1978 |
| Priority date | — |
| Expiry date | Sep 21, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S493/936
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An apparatus for forming, filling and closing bags has a hollow mandrel on which a hose is continuously formed from a sheet; two vertically reciprocating and horizontally oppositely movable shoes underneath the mandrel for cyclically pressing together a first hose portion and providing a transverse seam thereacross as the hose and the shoes move downwardly in unison; a folding device cyclically forming bottom flaps from a second hose portion at opposite sides of the hose at the lower end of the mandrel above the first hose portion; a clamping device for firmly grasping the hose at the second hose portion and backing the bottom flaps along the entire hose cross section as it pulls the hose downwardly from the mandrel while moving simultaneously downwardly with the shoes and while the hose part that terminates at the bottom flaps is being filled with goods by gravity; and a cutting device for cutting through the transverse seam when the shoes and the clamping device have pulled the hose to a predetermined low position for severing a previously filled hose portion as a separated, sealed bag from the upstream, still coherent hose.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.