Re: Need recommendations on security

"Mike Easter" <[email protected]> wrote in message
news:[email protected]...
| Frog Prince wrote:
| > "Mike Easter"
|
| >>>but if I don't bring back the Kerr Jars in a timely
| >>> fashion I'm put on 'allocation'.
|
| >> What are you going to be doing with *her* Mason jars and tops after
| >> you're done with the goodies inside anyway? ;-)
|
| I was wondering why you called Mason jars Kerr [altho' I've seen that
| name, including 'Kerr Mason'] and I call them mason.
|
| So I went looking around and found this history article.
|
| http://www.pickyourown.org/canningjars.htm  A Brief History of Common
| Home Canning Jars - Until 1858, canning jars used a glass jar, a tin
| flat lid, and sealing wax, which was not reusable and messy! - John L.
| Mason, invented the mason jar.- a glass container with a thread molded
| into its top and a zinc lid with a rubber ring.  The rubber created the
| seal, and the threaded lid maintained it.  - Clamped Glass-Lid Jars
| (Lightning Jars) - Atlas Jars - Ball Jars - Kerr Jars - Mr. Kerr later
| (1915) invented a smaller, flat metal disk with the same permanent
| composition gasket. The lid sealed on the top of a mason jar; a threaded
| metal ring held the lid down during the hot water processing. The jar we
| know today was born!
|
|
| I'm a big pressure cooker cooking dude/fan, but I don't do any pressure
| cooker canning.
|

Might be because there was no pressure needed for canning in a Kerr jar.
What suction created was  due to the heat expanding the content of the jar
which was sealed AFTER the jar and content were brought to thermal
equilibrium at the temp of boiling water.