Patent ID: 7080952

Claim:
A pen for use on electronically scanned cards and like uses where uniform width of the pen stroke is desirable comprising: (a) a pen body adapted to be grasped during use; (b) a reservoir in the pen body for containing ink; (c) a deformable tip in communication with said reservoir for receiving ink therefrom with said tip protruding from and end of the body; (d) a pocket in said tip for facilitating tip deformation during use; and (e) a scraping blade carried by the pen; (f) wherein the scraping blade is provided with rounded outer corners comprising means for avoiding the tearing of a card or ticket with which it is used; (g) a recess carried by the pen; wherein the recess is defined by angle surfaces, and wherein complementary angled surfaces define in portions of the blade that are carried in the recess; and wherein the angled surfaces of the blade comprise at least one reverse barb for gripping against the angled surfaces of the recess.