Screw capper
US6519913B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 29, 2001 |
| Grant date | Feb 18, 2003 |
| Priority date | — |
| Expiry date | Oct 29, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB67B3/2093
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A screw capper includes a capping head which comprises a chuck for holding a cap, a motor for driving the chuck for rotation, a cam mechanism for elevating the chuck, and an air cylinder for imparting a load to the chuck. A load imparted by the air cylinder is controlled by a controller to be zero from the beginning of a screwing and tightening operation until an angle of rotation of the chuck exceeds a specific angle where the load is changed, and is controlled to a higher value upon detection of an angle of rotation of the chuck which exceeds the specific angle in the course of the screwing and tightening operation. The arrangement allows a reliable screwing and tightening to be achieved as compared with the prior art while preventing a damage to threads or the occurrence of a cocked cap.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.