Browse Prior Art Database

Pallet Structure For Handling Modules of Various Sizes

IP.com Disclosure Number: IPCOM000085479D
Original Publication Date: 1976-Apr-01
Included in the Prior Art Database: 2005-Mar-02
Document File: 2 page(s) / 79K

Publishing Venue

IBM

Related People

Hardardt, AT: AUTHOR [+2]

Abstract

The primary function of the pallet is to retain modules in a fixed array for all module assembly and finishing operations. Because of the size variety of modules, a pallet having a common geometric form factor, standardizes the equipment's handling technique and reduces the physical handling of modules. This pallet design provides this requirement, and in addition, the integrated features necessary for module cleaning, solder reflow, locating, and storage. The pallet assembly illustrated in Fig. 2 is comprised of two thin stainless steel plates 1 and 2 each measuring 0.020" thick x 5.5" x 5.75". The plates are spaced apart in a parallel fashion, using annular spacers 3 to make up a hollow thin plate structure.

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Pallet Structure For Handling Modules of Various Sizes

The primary function of the pallet is to retain modules in a fixed array for all module assembly and finishing operations. Because of the size variety of modules, a pallet having a common geometric form factor, standardizes the equipment's handling technique and reduces the physical handling of modules. This pallet design provides this requirement, and in addition, the integrated features necessary for module cleaning, solder reflow, locating, and storage. The pallet assembly illustrated in Fig. 2 is comprised of two thin stainless steel plates 1 and 2 each measuring 0.020" thick x 5.5" x 5.75". The plates are spaced apart in a parallel fashion, using annular spacers 3 to make up a hollow thin plate structure. The principle involved here is the removal of material from regions of zero or low stress and the addition of material to regions of high-stress level.

The thin plate structure has a cross section of 0.125" and is placed at the base of the pallet assembly, avoiding contact with the module pins 4. This practice eliminates the need for complex clearance hole patterns and simplifies the fabrication technique. The modules 20 are supported on shoulders 22 of product support and locator pins 5. Pins 5 secure the plates and spacer in combination with retaining cap 10.

The exploded view of Fig. 1 shows the key elements comprising the pallet. The top and bottom plates 1 and 2 contain the same matrix of holes. This matrix is unique for each substrate size, as indicated in Figs. 3, 4 and 5. The t...