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:
Feb. 08, 1994
Filed:
Jul. 27, 1992
Applicant:
Inventors:
Assignee:
Kanzaki Paper Mfg. Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B41J / ;
U.S. Cl.
CPC ...
400234 ; 400218 ; 226195 ; 2421 / ;
Abstract
An object of the present invention is to provide a ribbon feeder to prevent a ribbon from slackening when a sheet is back-fed in a thermal printer. When a ribbon is fed from a ribbon feed roller, resistance is imparted to the rotation of the ribbon feed roller by a first spring. Further, resilient force is stored in a second spring by tension produced when the ribbon is fed from the ribbon feed roller. The ribbon tends to slacken when the sheet is back-fed, such slackening ribbon is rewound by reversely rotating the ribbon feed roller by the stored resilient force.