B - Operations – Transporting – 43 – K
Patent
B - Operations, Transporting
43
K
207/28
B43K 29/12 (2006.01) B43K 29/087 (2006.01)
Patent
CA 1129814
ABSTRACT A writing pen with writing point of any type, in the holder or grip portion of which is incorporated a movable-ribbon ready reference device readable through a window. This device, pre- printed and capable of being written on by hand, is wound on a pair of spools which can be turned in both directions by means of a knob at the top end of the pen. The knob forms a single whole with a tubular body on the inner surface of which is formed a helical toothing engaged with two toothed pinion gears, each of which is keyed idly to a flexible shaft rotating solidly with one of the spools on which the ribbon-type ready reference device is wound. Forming a pair with each helical tooth pinion gear there is mounted, in an inverted position with respect to the other pair, a second butt pinion gear which is solid with the respective transmission shaft. Each helical tooth pinion gear if free to travel a short longitudinal distance on its own shaft and then to engage or disengage the second butt gear pinion, with the result that each rotation direction of the knob will be matched by an axial translation of the idle pinion gears and the locking of one of them, with the freeing of the other, in the butt pinion gear solid with the transmission shaft, with consequent moving of the ribbon in the same direction.
343772
Ridout & Maybee Llp
Tipografia S. Rocco Di Zuffellato Giuseppe
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