Method and apparatus for producing bags in two rows with subsequent stacking, especially for the production of bags from flattened blown thermoplastic foil
US6149565A · kind A · utility
20Cited by
10References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 24, 1998 |
| Grant date | Nov 21, 2000 |
| Priority date | — |
| Expiry date | Nov 24, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S493/926
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method of and an apparatus for producing stacks of bags where, instead of connecting the position of the foil web, a marking on the foil web is detected and used to correct the positions of the devices which operate on the web. These devices can include a cutter for removing a strip from the upper layer of the flattened blown tubular web, the punch for punching holes in the lower layer, and the device for infolding are among the devices controlled in response to the marking. The latter can be printed on the web as it is unrolled or formed during the extrusion or foil blowing process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.