B - Operations – Transporting – 41 – J
Patent
B - Operations, Transporting
41
J
197/63
B41J 1/00 (2006.01) B41J 9/38 (2006.01)
Patent
CA 1223837
ABSTRACT An electromagnetic printing hammer device including a permanent magnet having a pair of electromagnetic pole-faces spaced apart from each other by a gap. A hammering element formed of a permanent magnet at least in one portion thereof is located in the gap for movement in a plane parallel to the pole-faces. The hammering element exerts a force of impact on the back of a type as a thrust is applied thereto when a pulse current is passed through the electromagnet, the hammering element being supported for linear movement in a direction in which it exerts a force of impact. The invention enables the time during which the hammering element moves in reciprocatory movement to be shortened and allows the speed at which the hammering element responds to the magnetism to be increased. The advantages offered by the invention include improved performance testified to by an increased number of prints produced per unit time, and a minimized loss of the energy of impact attributable to the linear movement of the hammering element, thereby greatly increasing the practical value of the device. PAT 8752-1
463966
Borden Ladner Gervais Llp
Ricoh Company Ltd.
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