Mechanical pencil equipped with lead-storing cartridge
US4619539A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 14, 1984 |
| Grant date | Oct 28, 1986 |
| Priority date | — |
| Expiry date | Aug 14, 2004 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB43K31/005
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A mechanical pencil is constructed of (a) a decorative barrel to be held by a user; (b) a lead-feeding mechanism disposed within the decorative barrel; (c) a lead guide connected to the lead-feeding mechanism; and (d) a lead-containing cartridge having an outer diameter substantially equal to the inner diameter of the decorative barrel and held detachably in the decorative barrel. The mechanical pencil according to the present invention can be continuously used by simply replacing a used-up cartridge with a fresh cartridge containing a plurality of writing leads. Thus, it is unnecessary, different from conventional mechanical pencils, to insert a fresh supply of writing leads one by one into the mechanical pencil. Since a user is not required to touch writing leads directly, his hands are not smeared.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.