Re: Lead screws and mill dust

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Frank" <ftkalcevic@...> wrote:

>
> I've been experimenting with making my own bellows. There is an
> interesting patent, #6054194, (link below) which describes the optimal
> fold patterns for a bellows made from a single sheet of material. The
> patent shows how to minimise the shape distortion as the bellows
> expands and contracts. Once folded, it holds its shape very well.
>
> I've experimented with polypropylene sheet, as it has great "hinge"
> characteristics. I started with some document folders from my local
> office supplier to test different thickness of the plastic. I found
> the thinner the better. I CADed up the pattern, printed it, then lay
> the polypropylene over the sheet (the polypropylene I have is
> translucent). I then used a scriber to scratch the fold lines and
> fold the bellows.
>
> Only yesterday I found polypropylene sheet sold by my local art supply
> place - 1200x600x0.39mm sheets. Today I am planning to make a new tip
> for my soldering iron and a guide so I can melt the fold lines into
> the plastic instead of soldering. If that works, I will make the full
> bellows.
>
>
>
> patent link - http://patft.uspto.gov/netacgi/nph-Parser?
> Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-
> bool.html&r=1&f=G&l=50&co1=AND&d=PTXT&s1=6054194.PN.&OS=PN/6054194&RS=P
> N/6054194
>

heck of a time with the cut url can cut an paste.

here is a the above in a TUNYurl from tinyurl.com

http://tinyurl.com/y5jg9m