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. 13, 2001
Filed:
Jan. 19, 1998
Yuji Kouchi, Nagano, JP;
Hisayuki Kobayashi, Nagano, JP;
Mimaki Engineering Co., Ltd., Nagano, JP;
Abstract
A cutting plotter equipped with a device for reading register marks for seal cutting capable of accurately reading the register marks printed on a seal material. The cutting plotter includes a head provided thereon with a light emitting element for emitting a predetermined amount of light toward a surface of the seal material and a light receiving element for detecting the amount of light reflected from the surface of the seal material. A difference between the amounts of reflected light detected by the light receiving element is calculated by a first calculation unit and then stored in a storage unit. A relative difference between the difference in the amounts of reflected light stored in the storage unit and a difference between the amounts of reflected light calculated by the first calculation unit is calculated by a second calculation unit. Also, a determination unit is arranged so as to determine whether or not the relative difference calculated by the second calculation unit is within a predetermined tolerance, to thereby determine whether or not the register marks are printed on the seal material.