Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
LEAK TEST DEVICE
Document Type and Number:
Japanese Patent JPH01105438
Kind Code:
A
Abstract:

PURPOSE: To inspect the insulation strength of the frit seal section of a color cathode-ray tube with multiple inch sizes by making a band-shaped elastic body with a conductor.

CONSTITUTION: A band-shaped elastic body 2 fixed to a frame 1 at one end surrounds the frame 1 then goes to the outside through a slit-shaped opening and is fixed to a fixed plate 8 via a coil-shaped elastic body 4 and a coil-shaped shape memory alloy 5. A conductor 11 is stuck to the face of the band-shaped elastic body 2 facing to a frit seal section 23, and the conductor 11 is grounded via a leak detector not shown in the figure. When a cylinder 7 is driven and the frame 1 is lowered to the frit seal section 23 and hot air is blown out through a nozzle 9, the coil-shaped shape memory alloy 5 is shrunk and simultaneously pulls the band-shaped elastic body 2 via the coil-shaped elastic body 4, and the band-shaped elastic body 2 is brought into contact with the frit seal section 23 of a color cathode-ray tube 20. The insulation strength of the frit seal section of the color cathode-ray tube with multiple inch sizes can be thereby inspected.


Inventors:
ICHIMURA KAZUYOSHI
Application Number:
JP1987000261396
Publication Date:
April 21, 1989
Filing Date:
October 16, 1987
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
NEC CORP
International Classes:
G01R31/02; H01J9/42; (IPC1-7): G01R31/02; H01J9/42



 
Previous Patent: JPH01105437

Next Patent: JPH01105439