USRE3781E - Improvement in fruit-jars - Google Patents

Description

PATENT OFFICE. l

THOMAS H. WHITNEY AND S. A. WHlTNEY, OF GLASSBOROUGH, NEW

JERSEY, ASSIGNEES OF JOHN FOOER. i

IMPROVEM ENT IN F RUlT-JARS.

Specification forming part of Letters Patent No. 55,581, dated June 12, 1866; Reissue No. 3,78l, dated December 28, 1869.

To all whom it may concern.-

` Be it known that JOHN FOCER, of Glassborough, in the county of Gloucester and State of New Jersey, did invent certain Improvements in Air-Tight Jars, of which the following is a specification.

This inventionl relates to air-tight jars in which fruits or vegetables are to be preserved; and the improvements consist, rst,in a ringot' thin metal having screw-threads adapted to similar` threads on the cover and on the neck of the jar; second, in the combination ofthe jar, cover, screw-threaded ring, and a gasket or packing-ring.

To enable those skilled in the art to make and use this invention, we will proceed to describe ts construction und operation.

`ln the annexed drawings, Figure 1 is a central vertical section of the upper part of an air-tightjar, showing theimprovernents. Fig. 2 is an elevation thereof'. Fig. 3 is a sectional plan on line l 2 of Fig. 1. y

The same letters are used in the designation of identical parts in all the igures.

A represents the neck of a jar, upon the exterior of which is formed a bead or screwthread,f, which vanishes on top in a shoulder, d. This shoulder is formed by an abrupt contraction ofthe neck for the purpose ot' receiving and supporting a gasket or packing-ring, O. The neck terminates in an annular flange, a, which forms the mouth of the jar.

B represents the cover, which has an annular Bange, b, fitting over the annular dange a of the jar. Screw-threads e, similar to those on the neck ot' the jar, are formed upon the exterior of the flange b, vanishing on top in a horizontally-projecting ange, h.

C represents a gasket or packin g-rin g, which may be of india-rubber or any other suitable material. It is to be slipped over the lan ge a. ot' the jar and supported upon the shoulder d thereof.

Dis a ring of thin metal. (Ordinary tinned plates will serve the desired purpose.) In this ring screw-threads are formed adapted to those.

on the cover and neck ot' the jar. This screwring is tirst applied to the cover by turning it on thersam'e until its upper edge reaches the projecting ange h thereof, after which the remaining portion of the screw-ring is applied to the neck of the jar by turning the cover around until the packin g-rin g C is so much compressed between the annular flange b of the cover and the shoulder d of the jar as to form a'perfectly air-tight joint.

As the screw-threads can be formed on the glass cover and jar during the process of making the same with but little trouble and expense, and as the ring can have its screwthreads readily formed by suitable rolling inachinery, it will be evident that my improved manner of herinetically closing preserve-jars possesses the advantage of simplicity and economy.

Should there be any slight inequalities in the screw-threaded portions of the cover and jar, they will not interfere with the proper adjustment of the ring and cover, inasmuch as the former is so thin as to readily yield to slight inequalities.

What we claim as the invention of the said JOHN FOCER, and desire to secure by Letters Patent, is v 1. The thin lnetahring D, having screwthreads adapted to similar threads on the cover.

B and neck A of a preserving-jar, all substantiall y as and for the purpose herein set forth.

2. The combination, with a preserve-jar the neck of which is constructed substantially as herein set forth, ot' the cover B, gasket O, and ring D, as and for the purpose specified.

1n testimony whereofwe have signed our names to this specitication Abefore two subscribing witnesses.

THOS. H. WHITNEY. S. A. WHITNEY. Witnesses:

S. W. WAEErcK, THos. ANNADOM.

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