A handwriting or ink applying device includes a casing for holding a flexible ink container, the casing having a writing tip at a writing end thereof The rear end of the writing tip communicates with an L-shaped ink-containing chamber. The ink-containing chamber has a valve interposed between the ink...http://www.google.fr/patents/US6106180?utm_source=gb-gplus-shareBrevet US6106180 - Handwriting or ink applying device
