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:
Jan. 02, 2001
Filed:
Aug. 21, 1998
Lars Tomas Ragnar Rosberg, Karlstad, SE;
Mats Ola Stark, Karlstad, SE;
Valmet-Karlstad AB, Karlstad, SE;
Abstract
A method for, without contact and with the aid of a measuring device, measuring in connection to an envelope surface of a measured object with respect to its cylindricity and/or its straightness relative to a straightness reference arranged parallel with the axis of rotation of the measured object, which measuring device besides said straightness reference comprises a measuring stand and a measuring carriage at which at least one measuring means is arranged, which measuring carriage is traversed along a support member parallel to said axis of rotation. According to the invention the measurement commences with a starting position for the measuring means relative the straightness reference and the measured object being determined, whereby a first measurement is performed for this starting position, after which the measuring means is moved to a further position along the support member while these new positions are continuously determined relative each other or said starting position, whereupon a measurement occurs. A laser beam is used as straightness reference, said laser beam being protected from external influence along at least a part of its length by a protective device. The invention also relates to a measuring device of the type described.