Length measuring apparatus

Geometrical instruments – Distance measuring – Scale reading position sensor

Reexamination Certificate

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Details

Other Related Categories

C033S702000

Type

Reexamination Certificate

Status

active

Patent number

07007397

Description

ABSTRACT:
A main scale is firmly bonded to a metal tape having a desired coefficient of linear expansion by a powerful adhesive. At the same time, the metal tape is fixed to a frame by a two-sided adhesive tape so as to be capable of expansion and contraction. A length measuring apparatus is provided, wherein a scale material which is unstable with respect to variations in temperature and humidity is stabilized, thereby achieving a desired coefficient of linear expansion.

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patent: 6766587 (2004-07-01), Kawada
patent: 6865820 (2005-03-01), Burgschat et al.
patent: 6904696 (2005-06-01), Boge et al.
patent: 2005/0108888 (2005-05-01), Burgschat et al.
patent: 05-269650 (1993-10-01), None

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