Device in the delivery of sheet-fed rotary printing machine for exhibiting curl formation on the leading edge of a delivered sheet
US4702468A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 11, 1985 |
| Grant date | Oct 27, 1987 |
| Priority date | — |
| Expiry date | Oct 11, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H2801/21
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A delivery system of a sheet-fed rotary printing machine having a conveyor for transporting a sheet in a given travel direction to a location of the delivery system at which a stack of sheets is deposited, a device for inhibiting curl formation in a leading edge of the sheet includes a device for downwardly directing the sheet at the location at which the stack of sheets is deposited, and blowing units exclusively disposed at a location of the delivery system whereat, as viewed in the given travel direction of the sheet, a forward region of the stack of delivered sheets and a leading edge of the downwardly directed sheet are disposed, the blowing units having a respective device located at opposite sides of the forward region of the stack and at opposite edges of the sheet adjacent the leading edge thereof for directing a controlled air jet substantially parallel to the sheet, with one directional component in the travel direction of the sheet and another directional component towards the middle of the sheet, along the underside of the downwardly directed sheet in vicinity of the leading edge of the sheet tending to curl.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.