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:
Jan. 01, 1980
Filed:
Oct. 12, 1977
Applicant:
Inventor:
Ulrich Heider, Munich, DE;
Assignee:
Siemens Aktiengesellschaft, Berlin & Munich, DE;
Primary Examiner:
Int. Cl.
CPC ...
B41J / ;
U.S. Cl.
CPC ...
400568 ; 400904 ; 400 65 ; 400551 ; 400555 ;
Abstract
A device is disclosed for index and exponent impression printing in typewriters. An exponent or index switching key has associated with it an edge detector, and parallel thereto, a state detector. A time function element which triggers a gate circuit for the triggering of the drive motor for the roller is connected behind the edge detector. A rotational direction reversal switching device is connected behind the state detector. The device is useful in office typewriters, data printers or telex machines not equipped with their own exponent or index printing symbols.