Writing implement having a capillary writing tip
US8177448B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 11, 2007 |
| Grant date | May 15, 2012 |
| Priority date | — |
| Expiry date | Jun 27, 2029 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB43K8/04
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A writing instrument that includes a barrel having a front end, a fluid reservoir compartment, and a longitudinal axis. The writing instrument further includes a head disposed at the front end of the barrel where the head has a front part with an opening and at least one rib having a peak; a capillary connector having a front portion, a main portion having a diameter, a rear portion having a diameter, and a radial shoulder, where the capillary connector extends from the front part of the head to the fluid reservoir compartment; and a ring substantially coaxial with the longitudinal axis and disposed at a distance from the opening in the front part of the head. At least one air passage is formed between the ring and the barrel and the at least on rib extends in a radial direction between the ring and the barrel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.