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Patent Searching and Data


Title:
IMAGE FORMING DEVICE AND PRESSURE INSPECTION METHOD INSIDE OF IMAGE FORMING DEVICE
Document Type and Number:
Japanese Patent JP2000243325
Kind Code:
A
Abstract:

To develop an inspection process using an easier method without inspecting an image forming device by actually displaying an image.

In an image forming device having an electron source having plural electron emitting elements 13 on a base board in an envelope 5, an image forming member (a face plate 4) oppositely arranged on the base board and a getter material 2 for maintaining a degree of vacuum in the envelope 5, a pressure detecting means 17 is arranged to detect pressure in the image forming device on the basis of a change in a surface color of the getter material 2.


Inventors:
TAKADA KAZUHIRO
Application Number:
JP4411599A
Publication Date:
September 08, 2000
Filing Date:
February 23, 1999
Export Citation:
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Assignee:
CANON KK
International Classes:
H01J9/42; G01L21/00; H01J29/94; H01J31/12; (IPC1-7): H01J31/12; G01L21/00; H01J9/42; H01J29/94
Attorney, Agent or Firm:
Keisuke Watanabe (1 person outside)