System and method for weighing items such as mailpieces with varying accuracy
US6713689B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 9, 2002 |
| Grant date | Mar 30, 2004 |
| Priority date | — |
| Expiry date | Jul 9, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01G19/005
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and method for fast weighing of items such as mailpieces with variable accuracy. The method includes a scale method having a platform connected to a load cell that provides an output signal to an analog-to-digital converter. The resulting digital output signal is processed by a low pass filter and analyzed by a microprocessor to determine weights of items on the platform. The microprocessor also determines postage amounts of items on the platform. The microprocessor also determines postage amounts as functions of the weights and outputs these postage amounts to a postage meter. The microprocessor determines the weights as the average of a sequence of digital output signal values if the average id not closer than D to any weight break, where D is the difference between a maximum output value and a minimum output value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.