Pencil device for plotting machine
US4540995A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 6, 1984 |
| Grant date | Sep 10, 1985 |
| Priority date | — |
| Expiry date | Apr 6, 2004 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB43L13/024
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A pencil device for a plotting machine comprises a housing (10) including a barrel (13) with a passage (13a) therethrough for receiving a lead (12) said passage having an exit for the lead at a forward end of said barrel; lead feeding means (11, 14, 15) located in said housing for containing spare leads and for continuously feeding the passage of said barrel with a lead; lead driving means (16, 17) for pressing the lead located in the passage against the recording medium during a writing operation; and means (36) for urging the forward end of the barrel in contact with the recording medium so that a consumed lead is replaced by a new lead without interrupting a trace being produced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.