Apparatus and method for in-register feeding of sheets
US4591143A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 26, 1984 |
| Grant date | May 27, 1986 |
| Priority date | — |
| Expiry date | Mar 26, 2004 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H9/105
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An apparatus for in-register feeding a sheet into a sheet-processing machine by conveying the sheet in a given feed direction over a feed table includes front lays engageably by a leading edge of the sheet for aligning the leading edge of the sheet, a pair of said pull-type lays located in the feed table respectively on mutually opposite operator and drive sides of the feed table at a slight spacing from the front lays, both the side lays being movable in the plane of the feed table transversely to the given feed direction of the sheet, a device for driving at least one of the side lays, a device for positioning the sheet having at least one sensor for controlling a displacement stroke of the driven side lay, an air control device connected to a vacuum generator and to both of the side lays for controlling suction air flow to the side lays, at least one of the side lays having a device for applying suction to the sheet until static friction is assured preparatory to aligning a respective lateral edge of the sheet, and a method for carrying out the operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.