Bag making machine and method
US4557713A · kind A · utility
8Cited by
10References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 16, 1984 |
| Grant date | Dec 10, 1985 |
| Priority date | — |
| Expiry date | Jan 16, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/1313
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Apparatus for making bags from a folded web of thermoplastic material includes a rotating drum to which the web is continuously applied. As the drum rotates through a given arc length, the web is tucked outwardly from the periphery of the drum in progressively deeper folds wherein the depth of tuck determines the width of the bag. A cam, controlling the depth of tuck is movable in a rectilinear radial direction for adjusting the depth of tuck, thereby controlling the bag width.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.