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. 22, 1980
Filed:
Apr. 10, 1978
Toshimichi Ota, Tokyo, JP;
Oki Electric Industry Co., Ltd., Tokyo, JP;
Abstract
The present invention discloses a dot printer in which means are provided for detecting deterioration of dot print elements which print characters and so on and for detecting trouble caused by a print drive circuit. Print sensing elements are placed at a suitable point of a platen corresponding to a traverse range of dot print elements which are housed within a printing head and a mechanism for driving each dot print element is provided when said dot print elements move in front of the above-said print sensing elements sensing signal is generated when said dot print elements effect printing on the print sensing elements, to indicate the existence of trouble of the print drive circuit or dot print elements.