Apparatus for prefeeding sheets of paperboard products
US5205704A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 20, 1990 |
| Grant date | Apr 27, 1993 |
| Priority date | — |
| Expiry date | Aug 20, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H2701/1764
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An improved prefeeder assembly for shingling sheets of planar material in which a sheet stack is positioned on a prefeeder lift conveyor which lowers the sheet stack into a floor pit to incrementally elevate the sheet stack. A block pusher assembly sequentially pushes block segments to a conveyor assembly where a shingling assembly shingles the sheets. A bottom sheet removal assembly having an in-path diverter plate contacts and diverts only the bottom sheet of the bottom most block segment as this block segment is being shingled. As shingled sheets are discharged to other process equipment, a tamping assembly actuated by balloon cylinders serve to tamp the sheet edges for uniform restacking.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.