Pen tip structure
US4795286A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 24, 1986 |
| Grant date | Jan 3, 1989 |
| Priority date | — |
| Expiry date | Jan 24, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB43K1/08
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A pen tip structure comprises (1) an elongated stem which defines a cylindrical outer surface and a flat end surface, the flat end surface including one or more grooves which extend from the cylindrical outer surface radially inwardly towards a center point thereof, (2) a tube positioned around the elongated stem, the tube including inwardly-extending protrusions that form at least one longitudinal ink flow channel along the cylindrical outer surface of the elongated stem, and an end portion which is located beyond the flat end surface of the elongated stem, the end portion providing a mouth, and (3) a rotatable member positioned between the noted mouth and the flat end surface of the elongated stem, the rotatable member having a surface portion which extends beyond the mouth for conveying ink to a receiving surface and an opposite surface portion for receiving ink supplied thereto by capillary action. The longitudinal ink flow channel(s) supply ink to the groove(s) in the flat end surface of the elongated stem, the ink being reliably supplied to the surface of the rotatable member under all writing conditions by capillary action.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.