Abstract: A case for elongate articles, such as writing instruments, includes a base and a cover hinged to the base for movement between open and closed positions. The base carries an article holder for receiving and holding an article in the case. The cover carries or is adapted to carry a holder for receiving and holding a second article in the case and in a position laterally alongside the article held on the base when the case is closed.

Abstract: A modular lead advancing mechanism receivable as an integral unit in a mechanical pencil. The mechanism includes a lead feed for feeding a pencil lead out of a pencil, and a force transmitter for transmitting a force from an operating button on the pencil to operate the lead feed.

Abstract: A nib changing apparatus for a fountain pen includes a tubular container having an opening at each end. A pair of end closures are each adapted to fit onto the end of the container. The end closures each include a socket configured to receive and engage a fountain pen nib in order to retain the nib therein.

Abstract: A container for ink for a writing instrument including a reservoir for containing ink, an ink feed for connection to a writing tip of a writing instrument for conveying ink from the reservoir to the writing tip, and a valve between the reservoir and the ink feed. The valve is subjected on one side to pressure in the ink feed and is subjected on another side to atmospheric pressure. The valve opens when pressure in the ink feed falls sufficiently below the atmospheric pressure acting on the valve, thereby allowing ink to flow from the reservoir to the ink feed.