Patent ID: 6200050
Filing Date: 2001-03-13
Classification: B43K

Abstract:
A pen having a retractable center stick and comprising:a) a hollow pen holder casing having an open end and a writing end, the hollow pen holder having a length;b) a center stick with a supply of ink located within the hollow pen holder casing and having a writing nib on a first end, a length of the center stick being greater than the length of the hollow pen holder such that a second end of the center stick extends out of the open end of the hollow pen holder;c) an engaging hole in the hollow pen holder;d) a locating hole in the hollow pen holder spaced from the engaging hole;e) a resilient element acting on the center stick;f) an upper cap attached to the hollow pen holder casing at the open end, the upper cap having a clip extending therefrom, the clip having a projection at a distal end thereof aligned with the locating hole; and,g) a key tube enclosing the second end of the center stick extending from the open end of the hollow pen holder, the key tube passing through the upper cap and having an elastic portion with a hook extending therefrom, whereby in a first position of the center stick, the hook engages the engaging hole when the writing nib is within the hollow pen holder casing, and exertion of a force on the key tube moves the center stick to a second position in which the writing nib is exposed outside of the writing end and the hook engages the locating hole, the hook being disengaged from the locating hole by moving the distal end of the clip such that the projection contacts the hook, whereby the center stick is returned to the first position by the resilient element, the length of the center stick being such that the center stick is buckled when in the second position.