Method and apparatus for making block bottom pillow top bags
US7490451B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 18, 2005 |
| Grant date | Feb 17, 2009 |
| Priority date | — |
| Expiry date | Jan 8, 2026 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D75/008
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Methods and apparatus for automated manufacture of block bottom pillow top bags. One method includes the following steps: (a) forming a web of bag making material into a tube; (b) joining respective confronting portions of the tube along a transverse line to form a first transverse zone of joinder having a length approximately equal to one half of a perimeter of the tube; (c) forming mutually opposing first and second gussets in the tube, the first and second gussets being separated from each other in the transverse direction by a minimum distance at a predetermined distance from the first transverse zone of joinder, (d) placing product in a portion of an interior volume of the tube disposed above the first transverse zone of joinder; (e) joining confronting portions of the tube along a transverse line to form a second transverse zone of joinder that fixes portions of the first and second gussets that are separated by the minimum distance; (f) cutting the web along a first transverse cut line located below the first transverse zone of joinder; and (g) cutting the web along a second transverse cut line located above the second transverse zone of joinder, the second transverse cut li…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.