Printer with sheet feeder having registering station and suction conveyor
US4307661A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 18, 1979 |
| Grant date | Dec 29, 1981 |
| Priority date | — |
| Expiry date | Sep 18, 1999 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H9/08
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
To print on each of a number of sheets, the sheets are advanced, preferably in underlapped form, up to registering stops. When a sheet has been registered at the stops, suction is applied to an underlying conveyor, the stops are withdrawn and the sheet is advanced in steps to a printing station, the sheet being held in register by suction during this advancement. Printing takes place while the sheet is stationary and still held in register, between steps of movement. Suction may be switched on and off at the registering station by means of a movable perforated switch plate, the perforations of which are aligned, in a first position of the switch plate, with suction-conveying perforations in another plate or belt; in a second position of the switch plate its perforations are misaligned with the perforations in the other plate or belt, preventing the application of suction to an overlying sheet. A suction conveyor may also be used to convey a web from a first station at which an operation is performed thereon to a second station at which another operation is to be performed thereon in register with the first operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.