Browse Prior Art Database

Glassmaster Clamshell

IP.com Disclosure Number: IPCOM000108348D
Original Publication Date: 1992-May-01
Included in the Prior Art Database: 2005-Mar-22
Document File: 2 page(s) / 94K

Publishing Venue

IBM

Related People

Haskell, RS: AUTHOR [+4]

Abstract

Disclosed is a clamshell that is designed for use with either glass master artwork or film artwork.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 54% of the total text.

Glassmaster Clamshell

       Disclosed is a clamshell that is designed for use with
either glass    master artwork or film artwork.

      The design is such that artwork set-up is done prior to
installation in an expose machine.  This allows for prealignment of
the artwork in each frame and reduces machine set-up time by enabling
quick frame changes.

      Each clamshell contains two frames that holds an artwork image
either exposed directly onto the glass or as a film image mounted to
the glass (Fig. 1).  Each glass panel (A) is mounted to the frame (B)
by means of metallic tabs (C) which have a threaded portion extending
away from the glass.  The tabs are set in a precision locating
fixture and are cemented to the glass using UV curable adhesive.
Holes (D) are bored in the glass to permit the protrusion of product
alignment pins (E) that are precisely mounted to the frame and
protrude through the glass once it is mated to the frame.  Alignment
of the artwork image to the frame registration pins is accomplished
through the use of an optical alignment machine.  This machine
registers the frame on two fixed pins (F) and uses an X-Y-THETA axis
to position fiducials in the artwork image precisely in line with
precision bored bushings on the machine.  Once the artwork is aligned
to the frame, the glass is secured by means of washers and nuts which
are placed over the threaded extensions on the metallic tabs and
secured.

      Each artwork is now pre...