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The Use of a 1-X Folded Flex Scheme to Optimize Folding Alignment

IP.com Disclosure Number: IPCOM000009971D
Publication Date: 2002-Oct-02
Document File: 2 page(s) / 68K

Publishing Venue

The IP.com Prior Art Database

Abstract

Disclosed is a method to design an asymmetrical folded package so that a top-down camera system can see the bottom of the package and allow for more accurate folding.

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The Use of a 1-X Folded Flex Scheme to Optimize Folding Alignment

Disclosed is a method to design an asymmetrical folded package so that a top-down camera system can see the bottom of the package and allow for more accurate folding.

Background

Currently, packages are folded “flush”, because a vision system or human operator cannot see the bottom edge and know exactly when to stop the folding operation (see Figure 1). The current state of the art offers no way to determine the quality of the fold, or if the package was “over folded”.

General Description

The disclosed method designs a folded flex package so that the top edge does not fold flush with the bottom edge (see Figure 2). This allows a profile callout in assembly, which measures the bottom edge to top edge backoff. This allows for repeatable manufacturing and alignment.  To design, simply design the fold region to NOT be in the center of the unfolded substrate left to right.  Upon folding, simpling add a protrusion in the folding jig equal to the X (the difference between a “flush package and the “non flush” package.  This protrusion would not allow a “flush fold” and give a repeatable 1-X folded package.

Advantages

Top Edge

 
In addition to achieving an accurate fold, the disclosed method uses a geometrical callout (profile) to quantify this as a critical to function parameter (CTF) in assembly, thus reducing scrap and increasing yield.

       
   
   

Notice how top edge and bottom edge are folded until they are flu...