Plastic big making apparatus
US6648808B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 13, 2001 |
| Grant date | Nov 18, 2003 |
| Priority date | — |
| Expiry date | Sep 14, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB26D7/1827
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
In an apparatus for making plastic bags from a web material comprising two or more layers of plastic film, the material is intermittently fed for a length along a longitudinal feeding path, to successively make plastic bags with wastes, each of the wastes having upstream and downstream edges. The apparatus includes partially cutting means disposed at a first station predetermined along the feeding path. The material is partially cut by the partially cutting means along the upstream and downstream edges of waste whenever intermittently fed and temporarily stopped. The apparatus further includes waste removing means disposed at a second station predetermined downstream of and at a distance from the first station. The waste reaches the second station when the material is intermittently fed again after partially cut by the partially cutting means. In addition, the apparatus includes discharge means disposed at a third station predetermined downstream of and at a distance from the second station. The material reaches the third station when intermittently fed again after partially cut by the partially cutting means. The material is pulled and torn by the discharge means from the downstre…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.