Double-chuck mechanical pencil
US6039485A · kind A · utility
4Cited by
11References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 11, 1998 |
| Grant date | Mar 21, 2000 |
| Priority date | — |
| Expiry date | May 11, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB43K21/22
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A double-chuck mechanical pencil has an outer tube, a tip fitting provided in the front of the outer tube, a tip chuck located at the tip of the tip fitting for holding a writing substance (e.g., a lead) and urged rearward in the axial directed, and a delivery chuck for delivering the lead. At least one of the tip chuck and the delivery chuck is formed of a synthetic resin material including polyoxymethylene.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.