Coating implements with material supply – Solid material for rubbing contact or support therefor – Including means to advance material
Patent
1978-12-27
1980-07-08
Yasko, John D.
Coating implements with material supply
Solid material for rubbing contact or support therefor
Including means to advance material
B43K 2116
Patent
active
042115000
ABSTRACT:
A tip-pushed type mechanical pencil permits a forward advance of a pencil lead by pressing the front end of the pencil against a writing surface and then releasing it. The mechanical pencil includes an outer cylinder in which an inner cylinder having a ferrule is fitted. The inner cylinder is normally urged by a first spring to cause the ferrule to project out of the front end of the outer cylinder. A control tube carrying a lead grasping packing is inserted within the inner cylinder. The control tube is urged toward the front end of the outer cylinder by a second spring. A chuck is received within the control tube, and is integrally connected with a lead passage tube which extends through the inner cylinder. The chuck cooperates with a chuck ring disposed within the control tube to grasp or release a lead. Both the chuck and the control tube are urged by a third spring in opposite directions. When the ferrule is pressed inward against the resilience of the first spring, the control tube retracts together with the inner cylinder, and when the force applied to the ferrule is released, the control tube moves toward the front end in delayed relationship with respect to the movement of the inner cylinder.
REFERENCES:
patent: 3850531 (1974-11-01), Ackermann
patent: 3892495 (1975-07-01), Narose et al.
patent: 4149813 (1979-04-01), Katz et al.
Adams Bruce L.
Burns Robert E.
Lobato Emmanuel J.
Pentel Kabushiki Kaisha
Yasko John D.
LandOfFree
Tip-pushed type mechanical pencil does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Tip-pushed type mechanical pencil, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tip-pushed type mechanical pencil will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-558662