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:
Jul. 25, 1995
Filed:
Jan. 21, 1994
Bernd Gugel, Ulm-Einsingen, DE;
Johann Stempfle, Pfaffenhofen, DE;
Mannesmann Aktiengesellschaft, Dusseldorf, DE;
Abstract
A matrix pin print head is set to a fixed distance (17) relative to a print counter support (2), where a recording substrate (3) rests on the print counter support (2). An ink ribbon (4) is guided in front of the print pins (5) between the matrix pin print head (1) and the recording substrate (3). Electromagnetic-coil pin drives (8, 9, 10) are coordinated jointly to the print pins (5) or individually to each print pin (5). Each print pin (5) can be moved within a stroke path (16) from a rearward withdrawn position (18) into a forward extended position (19) and back. In order to adjust the operating air gap (25) between a magnet yoke (9) and a clapper armature (10) during its operation, it is provided that the drive energy, fed of equal size in each case to each print pin (5), is changeable in each case in uniform amounts, i.e. by equal amounts, to enlarge or to decrease the drive energy fed to the respective print pin (5).