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:
Dec. 24, 1991
Filed:
Mar. 26, 1991
Makoto Shimizu, Tokyo, JP;
Hiroshi Konishi, Tokyo, JP;
Oki Electric Industry Co., Ltd., Tokyo, JP;
Abstract
An automatic head gap adjustment device for a printer has a plunger that protrudes beyond the print head toward the platen, a linear transducer that detects the amount by which the plunger is depressed, and a motor for widening and narrowing the head gap by moving the print head or platen. A controller drives the motor forward, narrowing the head gap, until the signal output by the transducer changes by a certain amount, then drives the motor in reverse for a fixed amount, widening the head gap, then preferably drives the motor forward again by a smaller fixed amount to take up play in the drive mechanism. This device adjusts the head gap accurately despite changes in ambient conditions.