Device for adapting negative pressure in a suction belt feed table of a sheet feeder to varying operating conditions
US5697606A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 8, 1995 |
| Grant date | Dec 16, 1997 |
| Priority date | — |
| Expiry date | May 8, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H2801/21
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
Device for adapting negative pressure in a suction belt feed or supply table of a sheet feeder to operating conditions which vary during sheet conveyance, having at least one endless, revolvingly driven conveyor belt provided with suction openings, and a side alignment device for laterally aligning a respectively foremost sheet of a shingled or overlapping sheet stream, and at least one suction box disposed below a conveying plane, the suction box, in a sheet feeding direction, being subdivided into a plurality of chambers subjectible to negative pressure independently of one another, includes a conveyor belt, a plurality of suction chambers disposed in the conveying plane below the conveyor belt, a common suction union and a swivelable shutoff element for selectively connecting the suction chambers to the suction union.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.