Sheet feeder for a printing machine
US4886261A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 25, 1988 |
| Grant date | Dec 12, 1989 |
| Priority date | — |
| Expiry date | Feb 25, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H9/04
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
Sheet feeder for a printing machine includes a receiving device adjustable in height for taking up a pile formed of individual sheets, a front stop for leading edges of the sheets, and at least one side stop for the side edges of the sheets at one side of the pile; alignment elements located at least at an upper end of the pile and exerting alignment forces on the pile towards the front and the side stops; a loosening device for neutralizing, at least partly, adherence of the upper sheets to one another; a conveying device for withdrawing the respective uppermost sheet from the pile and feeding it into the printing machine; and an additional sheet alignment device acting upon the surface of the respective uppermost sheet, at least until it is taken over by the conveying device, in a way that the alignment device exerts alignment forces upon the sheet towards at least one of the stops; the additional sheet alignment device being offset with respect to the conveying device towards respective trailing edges of the sheets.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.