Method and apparatus for making bags
US10933604B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 20, 2018 |
| Grant date | Mar 2, 2021 |
| Priority date | — |
| Expiry date | Aug 29, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05F3/02
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A machine for making bags is disclosed and includes input, drum, and output sections. The drum section has at least one seal bar on a drum. The sections are mounted to side frames that are single metal plates. The frames are not coated after being formed and/or are comprised of at least one of galvanized steel, galvannealed steel, stainless steel or aluminum. The drum is comprised of first and second plates, and opposing third and fourth plates. The first plate is rotatable with respect to the second plate, and the third plate is rotatable with respect to the fourth plate. The distance from the seal bars to the center of the drum is responsive to the rotation of the plates. The first plate has a plurality of non-radial grooves, and the second plate has a plurality of radial slots, with fixtures in the slots and grooves. The fixtures are connected to seal bars. The non-radial grooves are curved and/or spiraled. The plates are comprised of zinc plated steel and/or are discs. The winder includes a rotatable turret with a center and surface wind position, and a center wind only position. When one spindle is in the center and surface wind position, the other spindle is in the center win…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.