Abstract: A marking instrument in which the marking element is advanced and retracted by the action of a sliding member integral with a cantilever spring which employs detent means for releasably locking the slide member in forward or retracted position.

Abstract: A writing tip or nib for a reservoir pen is provided comprising a thin-walled hollow element (10), e.g. of metal, having an outwardly convex end wall portion (12) defining the writing surface of the tip, and several perforations (13) extending through the end wall portion for conducting ink directly to the writing surface from inside the tip. The perforations may be at least 8 in number and measure 50-200 microns across. The outer edges of the perforations are smoothly rounded at the writing surface and the perforations taper gradually inwardly from the writing surface.

Abstract: A reservoir pen in which flow of ink from a reservoir to a nib is controlled by a valve which is actuated by the deflection of the nib during use.

Abstract: A toothbrush system comprises a dispensing container for a number of exchangeable toothbrush heads engageable in turn with a common handle which can be firmly engaged with an individual head while the head is held in the container. The container is further provided with a special chamber adapted for receiving the head and disengaging the head from the handle.