Method for the zigzag-like folding of a strip-like foil
US5689989A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 24, 1996 |
| Grant date | Nov 25, 1997 |
| Priority date | — |
| Expiry date | Apr 24, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2219/328
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The method for the zigzag-like folding of a strip-like foil includes the following steps in an advantageous embodiment: PA1 1. prepleating, whereby a zigzag-like or wave-shaped folding is effected in which the folded edges are formed in cross-section as arcs with a radius of curvature greater than about 1 mm; PA1 2. follow-up forming of each second folded edge in that a coining tool is used to influence the fold angle and to reduce the radius of curvature of the folded edge to a value smaller than 1 mm; PA1 3. follow-up forming of the remaining folded edges in the same manner as during the second step. The follow-up forming steps are executed with tumble pressing devices which respectively include a rotatable toothed roll and a coining tool. The coining tool is drivable by means of an eccentric device and is connected via a pendulum axle with a vertically displaceable slider. The coining tool, in cooperation with a respective tooth of the roll, reduces the radius of curvature of a folded edge and can additionally influence the associated fold angle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.