Patent ID: 9452634
Filing Date: 2016-09-27
CPC Classification: B43K

Claim Text:
1. A writing instrument comprising: (a) a plurality of knuckles arranged in a longitudinal series; (b) a tube and scriber combination wherein the scriber comprises a colorant carrying cartridge, said combination extending through the knuckles, said combination's scriber being mounted within the tube and having a longitudinal scribing end; (c) first and second leaves, each leaf among the first and second leaves having proximal and distal ends, the first and second leaves being connected operatively to the knuckles for movement between closed and opened positions, the distal ends being adjacent each other upon movements of the first and second leaves to their closed positions, the distal ends being displaced circumferentially from each other upon movements of the first and second leaves toward their opened positions; and (d) a screw actuator assembly adapted for alternately longitudinally extending the tube and scriber combination with respect to the knuckles and for oppositely longitudinally retracting said combination, said assembly being connected operatively to the tube, wherein a first knuckle among the plurality of knuckles is fixedly attached to or formed wholly with the first leaf, wherein a second knuckle among the plurality of knuckles is fixedly attached to or formed wholly with the second leaf, and wherein the screw actuator assembly comprises first and second slide ridge and slide channel combinations, the second slide ridge and slide channel combination's slide channel being helical, and wherein the second slide ridge and slide channel combination is adapted for actuating the tube and scriber combination's longitudinal extension upon movement of the first and second leaves toward their opened positions, and is adapted for alternately actuating the tube and scriber combination's oppositely longitudinal retraction upon movement of the first and second leaves toward their closed positions.