Method for monitoring and controlling the weights of each layer of a multilayer tablet
US5322655A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 19, 1993 |
| Grant date | Jun 21, 1994 |
| Priority date | — |
| Expiry date | Feb 19, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2043/3618
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method for controlling and monitoring instrumentation for a multilayer tablet press mechanism is disclosed. The compression for each layer, other than the first, takes the measured variable or error from the previous layer control loop and applies a transformation to that variable or error. The resulting transformation is then used as a compensation to the subsequent layer control loop in the form of a modified set point, modified measure variable, modified error, or modified control output. Additionally, the variable or error resulting from the previous control loop is fed back into the controller for the previous control loop so that any adjustments necessary in the previous layer loop may be completed. The variable or error is also used to determine whether to accept or reject the tablet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.