While the patent uses legal/technical language...what I got from what I
skimmed was that (subtly implied) the disk could be used over...to
reseal the bottle.  What good is a 1 time use cap?  You'd have to use
ALL the milk at one time then.  I think their point about it making a
tight seal...that would have to be broken to make it a bad seal...was to
drive home the effectiveness.  Does seem a bit hard to imagine reuse
tho.  So perhaps I am wrong.  ??  And thinking of those caps that Were
intended for reuse.

If it was a one-use cap - I doubt this cap was in use (successful) for
very long then...since it wouldn't be too practical.  And many folks
invented various types of such 'wafer like' lids for milks....with tabs,
etc.  

The patent says they prefer 'white wood' as the best material.  No where
is rubber (or ceramic) mentioned as a material for their disk.

>-----Original Message-----
>From: HISTORICAL ARCHAEOLOGY [mailto:[log in to unmask]] On 
>Behalf Of Bob Skiles
>Sent: Wednesday, September 12, 2007 1:33 PM
>To: [log in to unmask]
>Subject: Re: Weird disks - milk lids
>
>Carol,
>
>The Barnhart patented disk was designed to be destroyed upon 
>opening ... 
>read the specifications in their patent # 411368.
>
>http://www.google.com/patents?id=2SFlAAAAEBAJ&pg=PA43&dq=ininve
ntor:Barnhart&as_drrb_ap=q&as_minm_ap=1&as_miny_ap=2007&as_maxm_ap=1>&as
_maxy_ap=2007&as_drrb_is=b&as_minm_is=9&as_miny_is=1889&as_m
>axm_is=9&as_maxy_is=1889#PPA44,M1