On-edge stacker
US5201504A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 28, 1991 |
| Grant date | Apr 13, 1993 |
| Priority date | — |
| Expiry date | May 28, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H2513/40
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
An on-edge stacker for stacking envelopes comprises a transporter and diverter, an accumulator, a spider wheel for delivering diverted envelopes to a conveyor belt of the accumulator, and a propelling arrangement to a drive diverted envelopes to the spider wheel. The diverter includes a gate for intercepting and diverting envelopes from the transporter. The stacker includes a device for laterally offsetting envelopes. In one embodiment, the spider wheel is suspended in a free-floating manner against a spring load. The floating spider wheel displacement as a consequence of stack increase is sensed to energize the accumulator conveyor belt drive to reduce the displacement. The actuation of the envelope propelling arrangement is sychronized in correlation with the positions of spaces between legs of the spider wheel. In operation, a diverted envelope is aligned, selectively offset, and propelled into the spider wheel. The spider wheel deposits the envelope on-edge onto the conveyor belt and thusly stacks envelopes side-on-side in the accumulator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.