B - Operations – Transporting – 41 – J
Patent
B - Operations, Transporting
41
J
101/94.4
B41J 7/92 (2006.01) B41J 1/24 (2006.01) B41J 9/46 (2006.01) B41J 9/48 (2006.01)
Patent
CA 1153243
Impact Printer Hammer Flight Time and Velocity Sensing Means Abstract of the Disclosure In an impact printer including a print wheel having a plurality of selectable character type bearing elements for respectively printing a plurality of characters, said print wheel being rotatable for selectively positioning selected type elements in successive print positions, impact means impellable against the selected elements to drive said elements against the printing medium and means for impelling the impact means against said selected type element, the present invention provides the improvement com- prising means for sensing the flight time of the impelled impact means until impact by sensing varia- tions in velocity of said impact means and means responsive to said sensed flight time for controlling the impelling means to vary the flight time. In accordance with another aspect of the present apparatus, means are provided for detecting the coin- cident engagement of the impact means with a type element by also sensing the velocity of the impact means after the impact means has reached a predeter- mined coincident engagement position.
358589
Sweat Robert H. Jr.
Thornhill William J.
International Business Machines Corporation
Kerr Alexander
LandOfFree
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