Pen and pen refill
US11472220B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 28, 2019 |
| Grant date | Oct 18, 2022 |
| Priority date | — |
| Expiry date | May 28, 2039 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA45D34/042
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A pen includes: an ink reservoir configured to store an ink; and a pen tip section including an ink application part configured to apply the ink to an ink application object. The ink application part of the pen tip section includes: a rigid tip made of a rigid material and having a hemispherical outer surface, an inner surface facing toward the ink reservoir, and a penetration part penetrating from the inner surface side to the outer surface side of the rigid tip; and at least one foam body filled in the penetration part at least on the side of the penetration part close to the outer surface side of the rigid tip, and provided with at least one air bubble formed to communicate from the outer surface side of the foam body to the inner surface side of the foam body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.