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. 13, 2007
Filed:
Sep. 11, 2003
Osamu Okuda, Nakakoma-gun, JP;
Kazuo Kido, Kofu, JP;
Hideki Uchida, Nakakoma-gun, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
An origin detection method for a component placement head includes setting an axial origin for each elevation nut section, of the component placement head, by detecting a rotational angle of a drive section corresponding to the elevation nut section. The elevation nut sections are then individually moved down from the axial origin so that light emitted from a light-projecting section is received by a light-receiving section without being interrupted. Then, it is confirmed that the axial origin of each elevation nut section is an origin of elevation by detecting interruption of light, emitted from the light-projecting section, by the elevation nut section at a position corresponding to the elevation nut section having been lowered from the axial origin by a prescribed light interruption dimension.