Original Publication Date: 1981-Jun-01
Included in the Prior Art Database: 2005-Feb-11
A print mechanism is shown in the drawing for impact inking of a paper surface. The mechanism includes a print hammer element 1 which is fixed at its left end. Print hammer 1 is raised up by the action of one of the four cams on rotating drum 2, thereby resulting in a downward tension on hammer 1. At the same time, an inner leaf section 3 of print hammer 1 is brought between a pair of outer leaves 4 of an electrostatic clamp. The two outer leaves 4 are stationary and in close proximity to inner leaf 3, such that the application of a suitable voltage to the electrostatic clamp will prevent the inner leaf 3 from being pulled downward by the spring tension of the print hammer element 1, and the print hammer is therefore cocked.