Device for the formation of a stack of flat articles, especially mail envelopes
US5224697A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 1992 |
| Grant date | Jul 6, 1993 |
| Priority date | — |
| Expiry date | Mar 31, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H2701/1916
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A device which forms a stack of flat articles such as envelopes is disclosed. A conveyor delivers flat articles to a movable carriage. The movable carriage includes a horizontal support and vertical support for aligning flat articles received. A stacking head supported on the movable carriage comprises four rotary rollers positioned at the vertices of a parallelogram. Two non-adjacent rollers are movable but maintained a fixed distance apart. The rollers support a belt which transfers received flat articles from the conveyor onto the horizontal and vertical supports. A strain-sensitive detector is coupled to the movable rollers for providing a signal to control carriage movement as the stack of accumulated flat articles increases.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.