V-Board folder for flexible plastic films
US4285686A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 5, 1979 |
| Grant date | Aug 25, 1981 |
| Priority date | — |
| Expiry date | Oct 5, 1999 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB31B70/36
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
Sheet folding means comprising a triangular frame structure having an apex over which a web of sheet material is passed for forming one or more folds therein, with a single fold forming a multi-ply web from a single web, and with multiple folds forming gussets within the web. In the device, continuous linear surfaces are provided for both defining the fold, and ultimately preserving the fold in the film moving across the folder structure. The folder includes a pair of mutually convergent arm members which converge toward an apex point adjacent to tip ends of the convergent arm members. First and second tip plates are provided for mounting upon the first and second converging arms respectively, with the tip plates each being polygons with linear edges, and being dimensioned so as to span the space between the converging arm means to form a selected apex point with the apex point being projected outwardly from the tip ends of the convergent arm members. When gussets are being formed, a gusset forming member having a pair of converging surfaces forming an apex is secured to the frame means and is adjustably disposed with the apex of the gusset forming member being positioned generally…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.