Air cushion inflation machine
US10131094B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 11, 2017 |
| Grant date | Nov 20, 2018 |
| Priority date | — |
| Expiry date | Apr 11, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F1/561
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An exemplary air cushion inflation machine includes: a first terminal connected to a direct current input; a second terminal; a reference resistor powered by the direct current input; an op-amp; and a transistor. The first terminal of the op-amp is connected to a variable voltage source and the second terminal of the op-amp is connected to the reference resistor. The transistor has a base connected to an output of the op-amp, an emitter connected to the reference resistor, and a collector connected to a first terminal of a sealing band apparatus having first and second terminals. A meltable material placed between the first and second terminals is melted by resistance of current flowing between the first and second terminals. The variable voltage source changes voltage based on a voltage drop measured across the first and second terminals by a voltage measurement device and the constant current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.