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Crop Tool for Circuit Board

IP.com Disclosure Number: IPCOM000118782D
Original Publication Date: 1997-Jul-01
Included in the Prior Art Database: 2005-Apr-01
Document File: 2 page(s) / 41K

Publishing Venue

IBM

Related People

French, W: AUTHOR [+2]

Abstract

It is desirable to remove handling edges from printed circuit boards cleanly without leaving any excess material which might cause the card to foul in the system unit or make the edge unsafe to handle. Typically, the handling edge and card are pre-routed so that the profile of the card is almost complete except for small pips which hold the handling edge in place across slots in supporting board material.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 83% of the total text.

Crop Tool for Circuit Board

      It is desirable to remove handling edges from printed circuit
boards cleanly without leaving any excess material which might cause
the card to foul in the system unit or make the edge unsafe to
handle.  Typically, the handling edge and card are pre-routed so that
the profile of the card is almost complete except for small pips
which hold the handling edge in place across slots in supporting
board material.

Methods of removing the handling edge are as follows:
  1.  Breaking off by hand:  this causes material to be left
       on the card and then fouls in the system unit or the
       card can delaminate resulting in scrapping cards.
  2.  Using cutters: commercially available cutters are difficult
       to get into the slot and normally leave on part of the pip
       after cutting.
  3.  A press tool can be used to cut out the card.  This is a
       reliable method to achieve a clean cut but is expensive
       for low volume.

      The Figure shows an improved crop tool for performing the
operation.  The improved tool fits into the slot, hooks over the pip,
and then shears it from the card.  The tool is designed to cut close
to the edge of the card; and hence, leave no material projecting
beyond the edge of the card.  It includes a fixed blade (1) and a
bottom pin (2).

      In operation, the fixed blade (1) fits into the slot (3) of the
Printed Circuit Board (PCB) and is th...