Patent ID: 8847930
Filing Date: 2014-09-30
Classification: B43K,G06F

Abstract:
1. An input device for a capacitive touch screen comprising: a rigid tubular shaft having a distal end and a proximal end along a longitudinal axis; an ink cartridge at least partially disposed within the tubular shaft and movable along the longitudinal axis between a stored position and an operating position, the ink cartridge having a writing tip that extends beyond the distal end of the tubular shaft at least when in the operating position; and a sleeve formed at least partially of conductive rubber, the sleeve having a first end that extends along the longitudinal axis beyond the writing tip of the ink cartridge when the ink cartridge is in the stored position, a second end that connects with the distal end of the tubular shaft, and a central hole formed in the first end through which the writing tip extends when the ink cartridge in the operating position; wherein when the ink cartridge is in the stored position, and when a pressure is applied to the first end of the sleeve such that the first end of the sleeve is pressed against a flat surface of the capacitive touch screen, the first end of the sleeve absorbs the pressure and conforms to the flat surface, forming a contact patch between the input device and the capacitive touch screen sufficient to facilitate electrical conduction from the input device to the capacitive touch screen.