Mechanical pencil
US4714365A · kind A · utility
12Cited by
6References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 14, 1986 |
| Grant date | Dec 22, 1987 |
| Priority date | — |
| Expiry date | Mar 14, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB43K21/033
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A mechanical pencil wherein a slider 11 in contact with a lead and an outer tube 1 with different frictional resistances other than a lead delivery mechanism for effecting lead-feed by general knocking operation are provided within the outer tube 1 or a fore means 2, whereby the end of a consumed lead 19 is pressed against or released from a surface of paper or the like to thereby project the lead 19 from a lead guide 12 by an amount corresponding to backward movement of the slider 11. The lead-feeding may be easily accomplished merely by pressing operation without changing the grip of the outer tube 1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.