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New Test Prodecure for Platen Flatness Check at High Temperature

IP.com Disclosure Number: IPCOM000120165D
Original Publication Date: 1991-Mar-01
Included in the Prior Art Database: 2005-Apr-02
Document File: 1 page(s) / 47K

Publishing Venue

IBM

Related People

Loomis, JR: AUTHOR [+2]

Abstract

Disclosed is a new method for accurately checking the flatness of press platens at temperatures exceeding 700 degrees F. During the flatbed lamination cycle at the elevated temperatures the press platens expand and demonstrate irregular movement. This new test method enables one to measure the degree of platen non-planarity, and compare the results to the standard lead wire test run at room temperature.

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New Test Prodecure for Platen Flatness Check at High Temperature

      Disclosed is a new method for accurately checking the flatness
of press platens at temperatures exceeding 700 degrees F.  During the
flatbed lamination cycle at the elevated temperatures the press
platens expand and demonstrate irregular movement.  This new test
method enables one to measure the degree of platen non-planarity, and
compare the results to the standard lead wire test run at room
temperature.

      The test vehicle is comprised of 40 mils of skived Teflon (du
Pont) that is bonded to 1 oz. copper at low lamination pressures
(less than 100 psi).

      A schematic of the new test vehicle is given below:
                ______________________________10Z COPPER
                     SKIVED TEFLON    40 MILS
                ______________________________10Z COPPER

      The 40 mil skived Teflon material is then cut into 1 inch
squares for use as the ultimate test vehicle in determining press
flatness at the high temperatures required.  The Teflon squares are
placed between the platens to be measured spaced approximately 3
inches apart.  The press is brought up to the lamination conditions
of 1000 psi (based on the number of Teflon squares) and 730 degrees
F. for 15 minutes.  Under these lamination conditions, the Teflon
flows and conforms to the irregularities of the platens.

      The press is then cooled, and the Te...