Ball point pen with tubular ball holder
US5000605A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 29, 1989 |
| Grant date | Mar 19, 1991 |
| Priority date | — |
| Expiry date | Mar 29, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB43K1/08
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A ball point pen wherein the ball is held in the front end of a tubular metallic holder. The inner side of the holder is coated with a molded plastic lining which defines a centrally located ink supply channel extending all the way to the ball, one or more axially parallel groove-like capillary channels which communicate with the channel and also extend all the way to the ball, and a seat which is engaged by the confined portion of the peripheral surface of the ball when the pen is in used. The external surface of the holder is partially coated with a jacket which is a snug fit in the front end portion of the housing of the ball point pen and is integrally connected with the lining at one or more points. The lining and the holder, as well as the holder and the jacket, have complementary annular profiles to fix the holder in a desired axial position as soon as the material of the jacket and lining sets. An internal projection of the holder extends into the lining closely behind the seat to transmit forces from the ball to the holder, and an external projection of the jacket abuts the front end face of the housing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.