Browse Prior Art Database

Glassmaster Optical Align Machine

IP.com Disclosure Number: IPCOM000116066D
Original Publication Date: 1995-Jul-01
Included in the Prior Art Database: 2005-Mar-30
Document File: 2 page(s) / 62K

Publishing Venue

IBM

Related People

Haskell, R: AUTHOR [+4]

Abstract

Disclosed is a glassmaster optical align machine which is used to precisely align glassmasters of other artwork images to a Clamshell Expose Fixture (*).

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This is the abbreviated version, containing approximately 76% of the total text.

Glassmaster Optical Align Machine

      Disclosed is a glassmaster optical align machine which is  used
to precisely align glassmasters of other artwork images to a
Clamshell Expose Fixture (*).

      The machine consists of three cameras and monitors (Fig. 1)
that are positioned in such a fashion to enable them to view the
relationship between alignment bushings and targets on the
glassmaster or artwork.  This allows the machine operator to easily
adjust the relative position of the targets to the alignment bushings
before fixedly mounting the glassmaster to the frame.  A glassmaster
is placed onto an air bearing/vacuum plate (Fig. 2A) which provides a
cushion of air to permit positioning of the glass against three fixed
pins without damaging the artwork lines that were exposed onto the
glass surface.  Once in position against the pins the air is switched
to vacuum to hold the glass firmly against the positioning plate.  A
set of micrometers (Fig. 2B) is used to permit the operator to move
the positioning plate and the glass in the X, Y and Theta directions
such that the targets are precisely positioned over the alignment
bushings as viewed in the camera monitors.  Once the targets are
aligned the operator can now place the frame of the clamshell over
the glassmaster and position it to the artwork by locating the frame
with two pins that match the two precision bushings on the machine
(Fig. 2C).

      These bushings are precisely positioned with respect...