Ball-point pen

Details Ball-point pen Ball-point pen

1996-02-14

1997-10-21

DeMille, Danton D.

Coating implements with material supply

Including ball, roller or endless-belt tool

With flow-regulator

401214, 401205, 401209, B43K 710

Patent

active

056789424

ABSTRACT:
A ball-point pen having a coupling, a tip at the distal end of the coupling, and a reservoir tube at the proximal end of the coupling. The tip may held in a tip holder, which, in turn, is coupled to the distal end of the coupling. A valve chamber is formed within the coupling with a ball seat having a guide hole therethrough on the rear portion of the valve chamber and projecting ridges on the front portion of the valve chamber. When the ball-point pen is positioned with its tip upward, a ball valve is brought into contact with the ball seat to close the guide hole and thereby prevent back flow of ink. When the ball-point pen is positioned with its tip downward, the guide hole is opened and the ball valve contacts the rear ends of the projecting ridges, so that ink flows into the tip through the guide hole, the valve chamber, and grooves formed between the ridges. A spring may be interposed in the inner hole of the tip with its proximal end held in place by the coupling. The distal end of the spring presses a writing point ball into contact with the ball-holding portion of the tip. A low-viscosity ink or an ink having shear thinning properties, i.e., statically a high viscosity which is decreased upon rotation of the ball during writing, is preferably used.

REFERENCES:
patent: 2969041 (1961-01-01), Arango
patent: 4311403 (1982-01-01), Liguori
patent: 4786198 (1988-11-01), Zgambo
patent: 5277510 (1994-01-01), Okamoto et al.

Affiliated with

Also associated with

Rating

Ball-point pen does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Ball-point pen, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ball-point pen will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1001706