Article positioning control apparatus
US5042223A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 15, 1990 |
| Grant date | Aug 27, 1991 |
| Priority date | — |
| Expiry date | Jun 15, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB43M3/04
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Apparatus for controlling the positioning of articles driven on a path comprises a first position detector mounted on the path upstream from a desired stop position for the articles on the path and a sensor for sensing displacement steps of the articles and triggered by the first position detector. The apparatus is characterized in that first detector is at a non-critical distance from the stop point, and in that it further includes a second position detector mounted at a distance which is known and referenced relative to the stop point, and means for deriving a stop-controlling parameter P during an initialization cycle using one of the articles driven along the path, on the basis of the number N of article displacement steps representing the known distance and on the basis of a number n of sensor steps measured between the article being detected by one of the two position detectors and then by the other. The invention is applicable to mail processing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.