The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 01, 1993
Filed:
Jun. 21, 1991
Johann Stempfle, Pfaffenhofen, DE;
Mannesmann Aktiengesellschaft, Dusseldorf, DE;
Abstract
An electromagnetic drive (5) for longitudinal motions is in each case furnished for each print pin (3) in a matrix pin print head (1). Guide mouthpieces (9), movable back and forth or, respectively, up and down, are furnished for the generation of speed and letter-quality printing. A lifting magnet device (10) serves for two defined end positions of a magnet armature (11). In order to dispose the lifting magnet device (10) within the smallest possible space, i.e. as compact as possible, and in order to improve the switching frequency, the lifting magnet device (10) is altogether disposed and attached, respectively, in a region (15) immediately adjacent to the guide mouthpiece (9) and includes a magnet yoke (17) with two or several magnet poles (18, 19). An armature body (21) is movable back and forth or, respectively, up and down between the predetermined and coordinated distance (20) of two unlike magnet poles (18, 19) by switching on or switching off or by changing polarity of the switched on lifting magnet coil (22). The guide mouthpiece (9) is attached to the guided armature body (21).