Re: Slide mounts

[P3D emdesher <emdesher@xxxxxxxxxxxxxxxxxxxx>]

On Fri, 5 Sep 1997, P3D Paul Talbot wrote:

> David W. Kesner wrote:
> 
> > The Spicer mounts fit perfectly in an EMDE aluminum
> > binder with one piece of glass (on the projection side).
> 
> I wonder if either the Spicer mounts or the EMDE binders have changed
> specs ever so slightly?  I have very recent examples of both, and my
> Spicer cardboard mounts do not fit in the EMDE binder without forcing
> them.  The cardboard mount is too tall, by a smidgen, before even using
> tape to seal the mount shut.  After forcing the cardboard mount in to
> the binder, the front and back sides of the mount bulge apart, the
> binder bends slightly in the same direction, and the top and bottom
> edges of the binder slant such that they are no longer perpendicular
> to the side edges.  Thus the mounted slide will not stand exactly
> vertical.  Do your Spicer mounts fit better than this in your EMDE
> binders?
> 
 
<snip>

The EMDE binder's specs have not changed; actually it would be nearly 
impossible to do so.  The aluminum foil is advanced in a two step 
fashion, and the internal dimensions are created when the foil is forced 
around the master die plate.  This die is in perfect condition, and I do 
have a spare master die plate.  If you examine my current production with 
pieces made decades before, they are identical in their internal (where 
you stuff the glass and mask into) dimensions.  What can vary a bit is 
the width of the bent foil around the edges, and that is something 
measured in 10,000's of a inch.  Spicer mounts being made out of paper stock 
can probably vary a tiny bit, and here's where I suspect the problem lies.  
Lest I get flamed, I would like to go on record that I too like these 
mounts, and have long felt that they were the best of their type.  But 
you must realize that, while I do admire the ingenuity of combining a 
Spicer mount and an EMDE binder, you are basically using a Chevy part to 
fix a Ford so it's possible to have some problems matching them up.  
That's the great advantage of using aluminum, in that dimensional 
accuracy can be maintained to very tight specs.  Unfortunately, there seems 
to be little buying interest in such items.  Dennis Sherwood  
emdesher@xxxxxxxxxxxx 


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