Pressure difference compensation membrane
US10518572B2 · kind B2 · utility
0Cited by
5References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 22, 2015 |
| Grant date | Dec 31, 2019 |
| Priority date | — |
| Expiry date | Aug 23, 2036 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB43K8/03
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A compensation membrane for compensating a pressure difference between the outside and the inside of a free ink reservoir of a pen or the equivalent, the membrane comprising a first portion having a first rigidity, and a second portion having a second rigidity, the first rigidity being less than the second rigidity. A pen or the equivalent comprising a free ink reservoir provided with such a compensation membrane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.