Browse Prior Art Database

Bonding Face Panels to Cathode Ray Tubes

IP.com Disclosure Number: IPCOM000115193D
Original Publication Date: 1995-Mar-01
Included in the Prior Art Database: 2005-Mar-30
Document File: 2 page(s) / 52K

Publishing Venue

IBM

Related People

Ball, M: AUTHOR

Abstract

In one method of bonding a face panel to a cathode ray tube, a measured volume of ultra violet light curable resin is dispensed onto the concave surface of the face panel. The CRT is accurately located above the face panel with its faceplate downwards and is lowered onto the facepanel. Resin is forced from the centre to the edges of the panel, thereby filling the gap between the CRT faceplate and the face panel.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 62% of the total text.

Bonding Face Panels to Cathode Ray Tubes

      In one method of bonding a face panel to a cathode ray tube, a
measured volume of ultra violet light curable resin is dispensed onto
the concave surface of the face panel.  The CRT is accurately located
above the face panel with its faceplate downwards and is lowered onto
the facepanel.  Resin is forced from the centre to the edges of the
panel, thereby filling the gap between the CRT faceplate and the face
panel.

      Flexible seals, meniscus detectors and a number of uv lamps,
typically 4, are used to partially cure the resin at the edges of the
panel thereby forming a seal.

      The process described here uses a single uv lamp and a mask to
form the seal at the edges of the panel (Figure).

PROCESS SEQUENCE
  1.  Cathode ray tube is accurately located in a fixture above the
       mask and uv light source as shown in the Figure.
  2.  A fixed measure of uv curable resin is dispensed into the
centre
       of the face panel.
  3.  UV lamp is powered on.
  4.  CRT is lowered onto face panel.  As this happens, the resin
flows
       from the centre to the edges of the panel, filling the gap
       between the CRT and the face panel.
  5.  As the resin flows towards the edge of the face panel, it flows
       out from the area that is shaded by the mask and into the area
       illuminated by uv light.  In this area the resin partially
cures
       forming a...