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:
Mar. 25, 1986
Filed:
May. 24, 1985
Hitachi, Ltd., Tokyo, JP;
Abstract
A pen changing apparatus for a plotter is disclosed. A plurality of pens are mounted on a carriage in alignment with the axial direction of a shaft which is provided on the carriage as the sliding axis thereof. A guide shaft is fixed onto the carriage in the same direction as the shaft. A sliding lever for pressing any of the plurality of pens is provided on the guide shaft such as to be movable in the axial direction of the guide shaft and rotatable around the guide shaft. A solenoid rotates the sliding lever so as to press down a desired pen at the position where the sliding lever is located in resistance to a pen lifting spring or restore the pen to its original position by the urging force of the pen lifting spring. Leaf springs position the sliding lever over the desired pen and retain the same when the sliding lever is moved and stoppers are provided approximately at both end portions of the travelling range of the carriage such as to stop the sliding lever alone at the position over the desired pen at the time of moving the carriage.