Stacker for flat material
US4261559A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 22, 1979 |
| Grant date | Apr 14, 1981 |
| Priority date | — |
| Expiry date | Jun 22, 1999 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H2701/1912
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A stacker apparatus for flat sheet material has a suction drum rotating on a stator. The suction drum grips the flat sheet material at one tangential position, arcuately moves it, and releases it on a stack at a second tangential position. The suction drum has a section containing a plurality of suction openings for gripping the sheet material. A plurality of peripheral suction channels on the stator communicate with the suction openings. The width of the suction channels decreases step-wise along their length so that the suction openings are initially in full communication with the channels, thereafter the suction openings are partially closed, and finally, selected ones of the suction openings are completely closed as the drum rotates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.