Pressure difference compensation membrane
US10994568B2 · kind B2 · utility
0Cited by
5References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 26, 2019 |
| Grant date | May 4, 2021 |
| Priority date | — |
| Expiry date | Nov 26, 2039 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB43K8/03
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A compensation membrane and a pen or the equivalent including a compensation membrane. The compensation membrane being configured for compensating a pressure difference between the outside and the inside of a free ink reservoir of a pen or the equivalent. The membrane including a first portion having a first rigidity and a second portion having a second rigidity, the first rigidity being less than the second rigidity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.