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Browse Prior Art Database

Multiple-Part Card Cover Design

IP.com Disclosure Number: IPCOM000102554D
Original Publication Date: 1990-Dec-01
Included in the Prior Art Database: 2005-Mar-17
Document File: 4 page(s) / 115K

Publishing Venue

IBM

Related People

Freiheit, WJ: AUTHOR [+5]

Abstract

Typical designs for logic card covers used in some systems for logic card packaging are constructed of alloy die castings in two pieces--a base cover and a top cover (see Fig. 1)--creating a number of problems and concerns: 1. Complex, expensive tooling 2. Difficulty in holding critical tolerances 3. Expensive detail parts that are difficult to manufacture 4. The need to release a large number of similar parts that

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This is the abbreviated version, containing approximately 52% of the total text.

Multiple-Part Card Cover Design

       Typical designs for logic card covers used in some
systems for logic card packaging are constructed of alloy die
castings in two pieces--a base cover and a top cover (see Fig.
1)--creating a number of problems and concerns:
      1.  Complex, expensive tooling
      2.  Difficulty in holding critical tolerances
      3.  Expensive detail parts that are difficult to manufacture
 4.  The need to release a large number of similar parts that

      differ only slightly due to necessary size and other
          mechanical variations in the cards being covered

      Referring to Fig. 2, the original two-part cover set is broken
down into a multi-part construction that allows each individual part
to be simpler in design, easier, and less expensive to manufacture.
The concept also provides a "pool" of a limited number of generic
parts that can be combined into a multiplicity of final assemblies
handling a large number of logic card and device-mounting variations,
presents no additional assembly difficulty to the line operator, and
can easily be adapted to cover sets of any incremental width to allow
for future system growth. Construction for a double-width cover set
is used as an example in the figure; components/assemblies mounted
within the cover set are not shown for clarity.

      The design is comprised of two die cast rails 1, 2 to which are
fastened covers 3, 4, which can be made of a number of materials:
die castings, sheet metal, or plastic. Completing the assembly are
latching devices 5, which are similar or identical to those used in
t...