Writing implement
US6702498B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 28, 2002 |
| Grant date | Mar 9, 2004 |
| Priority date | — |
| Expiry date | May 28, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB43K8/04
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A writing implement having a feeder core for feeding ink in an ink tank to a pen tip and an ink collector in which a plurality of comb-tooth like elements formed with an air-liquid exchange groove are arranged at intervals in a feeder core axial direction. An ink holding plate is provided so as to face a rear end face of the ink collector in such a manner as to form a gap for holding the ink in the ink tank by way of the capillary phenomenon between the ink holding plate an the rear end face. A plurality of air exchange grooves in which ink flows and is discharged in an amount responding to a change in pressure in the ink tank into and from grooves between the comb-tooth like elements which are formed between an outer edge portion of the comb-tooth like element and a feeder core contact.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.