Moistening system for envelopes that reduces clogging caused by contaminants
US9643448B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 23, 2011 |
| Grant date | May 9, 2017 |
| Priority date | — |
| Expiry date | Feb 24, 2035 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05C11/105
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A moistening system that significantly reduces the problems caused by contaminants in the moistening fluid is provided. The catch basin of a moistening system is provided with a filter that reduces the amount of contaminants contained in the recycled moistening fluid. Additionally, the moistening fluid is buffered with an acid that acts to dissolve the paper filler and other soluble debris that may be introduced into the moistening fluid, thereby significantly decreasing any blinding of components of the moistening system that would otherwise reduce the flow rate of the moistening fluid through the system. These ensure that sufficient moistening fluid is applied to the envelope flaps, which results in consistent and complete sealing of the envelope flaps.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.