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. 29, 2016
Filed:
Apr. 14, 2010
Near-end of roll detecting apparatus for detecting near-end of roll of recording medium, and printer
Hiroyuki Tsugaru, Saitama, JP;
Gen Matsushima, Tokyo, JP;
Katsutoshi Mukaijima, Tokyo, JP;
Tetsuya Yamamoto, Tokyo, JP;
Hiroyuki Tsugaru, Saitama, JP;
Gen Matsushima, Tokyo, JP;
Katsutoshi Mukaijima, Tokyo, JP;
Tetsuya Yamamoto, Tokyo, JP;
Citizen Holdings Co., LTD., Tokyo, JP;
Citizen Systems Japan Co., LTD., Tokyo, JP;
Abstract
To improve precision in identifying the amount that remains of a recording medium, an apparatus includes a paper holder that supports an outer circumferential surface of a recording medium that is biased downward in a vertical direction by the weight of the recording medium, such that a position of a center of the recording medium moves on a straight-line trace, associated with consumption of the recording medium; and a light-reflecting sensor that is provided at a predetermined position at a side face of the paper holder and senses displacement per unit time at a position facing the predetermined position of the recording medium that is rotated by being pulled out of the paper holder, associated with the consumption of the recording medium, where based on the displacement sensed by the light-reflecting sensor, a radius of the recording medium at the time the light reflecting sensor senses the displacement is calculated.