A Mason jarnamed after John Landis Mason who first invented and patented it inis a molded glass jar used in home canning to preserve food. The jar's mouth has a screw thread on its outer perimeter to accept a metal ring or "band".

The band, when screwed down, presses a separate stamped tin-plated steel disc-shaped lid against the jar's rim. An integral rubber ring on the underside of the lid creates a hermetic seal. The bands and lids usually come with new jars, but they are also sold separately.

While the bands are reusable, the lids are intended for single-use when canning. Largely supplanted by other products and methods for commercial canning, such as tin cans and plastic containers, glass jars and metal lids are still commonly used in home canning.

Lightning fruit jarsanother type of Mason jar, were not as common as the screw-thread version, but they were popular for home canning in the late nineteenth and early twentieth centuries. They are also produced in a variety of volumes, including cup half-pintMisr Insurance Companyquartand half- gallon. Jarden Corporation, based in Boca Raton, Florida[1] retains the license to use the Ball and Kerr registered trademarks on home-canning products as a part of its branded consumables business.

In home canning, food is packed into the mason jar, leaving some empty "head space" between the level of food and the top of the jar. The lid is placed on top of the jar with the integral rubber seal resting on the rim. A band is screwed loosely over the lid, allowing air and steam to escape. The jar is heat sterilized in boiling water or steam and the lid is secured.

The jar is then allowed to cool to room temperature. Once cooled, the band is removed to prevent residual water between the jar threads and the lid from rusting the band.

If the jar seal is properly formed, internal vacuum will keep the lid tightly on the jar. The vacuum in a properly sealed mason Qt World Wide Company pulls the lid down Kerr Canning Company create a concave-shaped dome. An improper or failed seal or microbial growth will cause the dome to pop upward. French chef Nicolas Appert invented the method of preserving food by enclosing it in sealed containers. Among the earliest glass jars used for home canning were wax sealers, named in reference to the sealing wax that was poured into a channel around the lip to secure a tin lid.

This process, which was complicated and error-prone, became popular in the late s or early s and was commonly used to seal fruit jars from the early s until about The wax sealing process was largely the only one available until other sealing methods were developed, [5] and widely used into the early s.

It usually had a milk-glass liner, but some of the earliest lids may have had transparent glass liners. Patent No. Since they were made in such quantity and used for such long periods, many of them have survived to the present day.

Between andmany other patents were issued for Mason jar improvements and closures. Trademark no. The court acknowledged that Mason had invented the jar inbut he did not apply for a patent for an improved version of the fruit jar until In the meantime, several others had patented designs and Mason had known these jars were being produced and sold. The court ruled that Mason's delay in protecting his patent indicated he had abandoned his invention in the intervening years between and and had forfeited his patent.

The court's decision allowed other manufacturers to patent, produce, and sell glass jars for canning. The closure consists of a metal wire arrangement with a lever that applies leverage to a glass lid when pivoted downward against the side of the jar, clamping it down Kerr Canning Company a separate rubber O ring. While bail-type jars are widely available in the United States, they are generally marketed there exclusively for dry storage and only rarely used for home canning.

Within a short time he sold the patent rights to several individuals, including Henry Putnam and Karl Hutter. The stopper or lid was typically made from metal, porcelain, or ceramic, while a rubber gasket was used to seal the container.

Putnam modified de Quillfeldt's design so that the lid was secured by centering the wire bail between two raised dots or in a groove along the lid's center. Putnam's closure was patented U. PatentDe Quillfeldt used the term "Lightning" to refer to the sealing method, but the closure's popular use on fruit jars led to the name, Lightning fruit jar. The sealing surface on the jar was a "shelf" that supported the lower edge of the lid.

A rubber gasket between the shelf and the bottom surface of the lid formed a secure seal when the wire closure was tightened. Although Lightning jars were popular for home canning use from the early s to the early s, they were not as Schumacher Elevator Company Denver Iowa as screw-thread Mason jars. A new type of Mason jar known as a "bead" jar was introduced around to These continuous screw-thread jars were designed with a bead between the screw threads and the shoulder as a sealing surface.

It had several variations, including a square-shaped jar. The jar lid had a rubber or rubber-like sealing surface and was held in place by a separate metal band. This type of jar and closure, which first became popular in the late s and s, is still in use. The decline in Mason jar manufacturing in North America is due to several factors: the lack of U. These include: A those using a zinc cap and a rubber jar ring, and B those using a glass lid, wire bail, and rubber sealing ring.

These provide "no definitive way to determine if a vacuum seal is formed. This holiday was created by Unboxing the Bizarre. Antique canning jars are often sold through antique stores and auction sites such as eBay. A jar's age and rarity can be determined by the color, shape, mold and production marks of the glass, and the jar's closure. Mason jars usually have a proprietary brand embossed on the jar. Early jars embossed with "Mason's Patent November 28th " that date from the late s to early s closely match the illustrations of Mason's patents.

Mouth-blown or hand-blown jars embossed with a version of "Mason's Patent November 28th " were made about to and often had a ground lip as well. By semi-automatic machines manufactured the majority of these jars. Machine-made Mason jars that originated around have a sealing surface on a bead ledge below the threads. This type of jar dominated the market by the mid to late s. Manufacturers continued to make jars with the beaded seal after the mid-twentieth century.

Colored jars were considered better for canning because the color blocked some light from reaching the food, which helps to retain The Fig Tree Company and nutritional value longer. Mason jars with this particular color of glass may be attributed to Ball, since "virtually no other bottle or jar was made in that color. Rarer still are cobalt blue, black, and milk-glass jars. Some unscrupulous dealers will irradiate jars to Kerr Canning Company out colors not original to the jar.

From Wikipedia, the free encyclopedia. Molded glass jar used in home canning to preserve food. Main article: Home canning.

Food portal. South Florida Business Journal. Retrieved Jarden Corporation. Jars for Canning. Society for Historical Archaeology. National Inventors Hall of Fame. Ball James T. In Equity" in Samuel Blatchford Auburn, NY: Derby and Miller. General Closure Types". Brantley A Collector's Guide to Ball Jars.

In the company manufactured fifty-four percent of all the canning jars made in the United States. See Frederic A. Birmingham Ball Corporation: The First Century. Alltrista was renamed Jarden Corporation in See "Alltrista Corporation History".

Funding Universe. Canner's Corner: Enjoying Summer's Bounty. MP 2. National Day Calendar. October 6, Healthy Canning. Categories : Glass jars History of glass Canned food Food storage containers introductions.

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