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:
Nov. 02, 1993
Filed:
Sep. 30, 1992
Brother Kogyo Kabushiki Kaisha, Aichi, JP;
Abstract
A printer having an adjusting apparatus for adjusting a head gap between a print head and a print sheet supported on a platen, is disclosed. In such printer, at first, a carriage 1 mounting the print head 8 thereon is advanced to the print sheet 6 by eccentrically rotating a guide bar 3 passed through a slide hole 1a with a solidable lubricant therebetween through a step motor 12 until a ribbon mask 9 contacts to the print sheet 6. And a drive pulse number Nm, which is input to the step motor 12 until the ribbon mask 9 contacts to the print sheet 6 and corresponds to moving distance of the carriage 1 from a standard position O, is calculated. Further, a value Na (=N1-Nm) representing a drive pulse number for the step motor 12 corresponding to a thickness of the print sheet 6, is calculated. Here, the N1 is a drive pulse number necessary to advance the carriage 1 toward the platen 2 till the ribbon mask 9 contacts to the platen 2 in case that the print sheet 6 is not supported on the platen 2 and stored in a NVRAM 29. Next, it is judged whether the calculated Na is bigger than or equal to a NaO which is stored in a ROM 25 and corresponds to a drive pulse number for the step motor 12 necessary to obtain the optimum gap between the print head 8 and the print sheet 6 when the print sheet 6 with 0.4 mm thickness is utilized.