Writing instrument improved outer barrel and method of producing the outer barrel
US5984556A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 3, 1997 |
| Grant date | Nov 16, 1999 |
| Priority date | — |
| Expiry date | Jan 3, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB43K5/005
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A writing instrument is disclosed which includes a cartridge having a writing tip portion and a unique barrel having a generally elongated tubular configuration and an outer surface portion having a plurality of spiral shaped surface irregularities in the form of surface grooves which enhance the gripping of the barrel by the user. The barrel also includes a multisided inner opening which, combined with the outer grooved surface, provides a unique array of light transmission and diffusion which distorts the appearance of the cartridge and the barrel thus causing the barrel to have a translucent character. A method of producing barrel stock from which the barrels may be cut is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.