US1880358A - Double-walled vacuum receptacle - Google Patents

Description

Oct. 4, 1932.

A. E. PAYSON ET AL DOUBLE WALLED VACUUM RECEPTACLE Filed July 24, 1929 2 Sheets-Sheet 'AuR/N E. PAY-SON MINER P. WETMORE INVENTOR5 ATTORNEY Oct. 4, 1932.

A. E. PAYSON ET AL 1,830,358

DOUBLE WALLED VACUUM RECEPTACLE Filed July 24, 1929 2 Sheets-Sheet 2 AUR/N E. PAYSo/V MINER P. WETMORE,

INVENTORS ATTORN EY Patented Oct. 4, 1932 AURIN E. rAYsoN AND MINER r. WETMORE, onNonwIoH, coNNEcrIGU'r DOUBLE-WALLED VACUUM RncErrAcnE- Application filed July 24,

This invention relates to glass jars and other receptacles of the so called vacuum type, and its object is to produce a novel jar 7 structure characterized by an inner lining of textile fabric, which protects the jar and prevents the shattering of glass in the event of breakage.

Vacuum jars of large size are being extensively used for storing and dispensing ice cream and other confections that must be kept at low temperature. The inside of these jars is usually cooled by means of dry ice, and the heat-insulation of the jars keeps the contents cold. The ordinary handling of these glass jars frequently subjects them to sudden shocks which sometimes break the inner glass wall, with the result that the glass flies violently in all directions almost as fine as powder. This shattered glass is liable to injure persons nearby, and such accidents have happened.

It is the purpose of our invention to provide avacuum jar structure that is absolute- 1y safe to handle, and we accomplish this by lining the inside wall of the jar with a textile fabric, which is preferably covered with an outer shell or coating of suitable material. In one embodiment of our idea, we use a cloth bag of linen, cheesecloth, silk, or the like, shaped approximately to the dimensions of the jar and glued to the glass wall in any practical way. Instead of a cloth bag, we may use ummed tape which is laid on in one or more layers. The textile lining is preferably sprayed with heavy varnish, lacquer, rubber or molten metal, to form a hard outer shell impervious to moisture and unaffected by the contents of the jar. The composite lining thus formed not only strengthens the jar and thereby prolongs its life, but also prevents shattering of the glass if the jar should break.

Two forms of our new jar structure are illustrated by way of example in the accompanying drawings, in which- Fig. 1 shows a sectional view of a doublewalled vacuum jar equipped with our new lining in which a cloth bag is used;

Fig. 2 is a fragmentary sectional detail on a grossly exaggerated scale to indicate the 1929. Serial no. 380,542.

adhesive mounting of the clothfand'the outer coating; p r r 5 Fig. 3 represents a vertical'section through a double-walled vacuum jar'pr'ovided with a liningof gummed tape, the section being taken on line 4-4 of Fig; 4:, 9 I Fig. I is a plan vi ewof Fig. 3; and

' Fig. 5 shows a fragmentary sectional'view on a grossly exaggerated scale to bring out certain 'detailsof the tape lining more clearly,

Referring to F igs; 1 arr-d2, a doublej walled vacuum-jar' lO comprises. outer and inner glass walls 12 and13- separated by an evacuated space'lgaccording to usual construction. This is ada 'oted tos'erve as a storing 5 and dispensing receptacle for foodstufls, par- V ticu larly ice cream and other confections that must be kept at low temperature. A cloth bag 15 of suitable fabric, suchas cheesecloth, linen, silk, and the like, is fixed to-the inner 7 wall 13 by an adhesive 16', which maybe glue, cement, a stickygum, varnish, other adhesive compounds that may be found practi cal. The cloth'linin g 15' is covered with a coating 17 of heavy varnish, lacquer, rubber, or sprayed metal, which constitutes outer protectiveshellj firmly retained in place by the cloth. In other words, the cloth linin --15 acts as a binder for the outer shellor coating 17, which is hard and substantially impervious" to moisture, easy to keep clean, and is not affected by the contents of the j ar. This compound lining is easily appliedto jars at very little expense, giving a receptacle that is safe to handle in commercial use and that lasts longer than unlined jars.

f In the modification cit-Figs.- 3-5, strips of gummed tape 18 are asted over the inner wall 12 in any practical Way to cover the wallcompletely. In thepresent instance, we have shown the tape applied vertically, but it may be put ofn ji'nhorizontal or diagonal layers, or infa combination of these different methods. For example, the vertical strips in Figs. 3 and 4 could be covered with horizontal or diagonal strips to provide a cloth lining of double thickness, as will be understood without additional illustration. The edges of agdj'acent stripsfmay ormay not overlap,

as, desired. Of course, there Will be some Among the metals that*may be used for spraying the outer shells 17 and 21 over the.

fabric linings 15 and 18 are copper, bronze, silver, gold, cadmium, aluminum, lead, zinc and others. This spraying of metal can be done by guns constructed for that purpose and available in the market. The sprayed surface 17 or 21 can be electroplated with compound which adheres to the tape and hardens to form a one-piece outer shell.

6. The method of treating a double-walled vacuum jar of glass which comprises covering the inner wall with a textile fabric which is glued in place, and covering said fabric with .a liquid or plastic compound which adheres to the fabric and hardens to form a one-piece outer shell.

' 7. 'A double-walled vacuum jar of glass covered insidewith a lining of gummed tape, the strips of tape being arranged radially across the bottom of the jar and thereby overlapping at the center to form a cushion of increased thickness.

. AURIN E. PAYSON.

MINER P. WETMORE;

chromium or a similar metal for additional strength, and at the same time to make the outer shellimpervious to corrosion. Should the jar become broken by an excessiveshock, the compound lining of a textile fabric backing and an outer homogeneous shell prevents shattering ofthe glass so that nobody can be injured. There is no danger of the outer wall 13 being broken,.because jars of thiskind are enclosed in a protective casing, usually of metal.

Although we have shown and described certain specific constructions, our invention is not limited to the details set forth. Changes and modifications may be made by others without departing from the scopeof the invention as defined.

claims.

We claim as our invention:

1. A double-walled vacuum, jar ofbreakable material provided inside with a lining of textile fabric which is covered with a hard outer shell composed of material applied 7 provided inside with a cloth lining stuck to the glass wall, said lining being covered with metal which forms a one-piece homogeneous outer shellfirmly adhering to the cloth. 3. A double-walled vacuum jar of glass provided inside with a lining of gummed tape which is covered with sprayed metal adapted to form a one-piece outer shell inti mately united with the tape.

4. The method of treating-a double-walled vacuum jar which comprises covering the inner wall with-a textile fabric, and spraying the fabric with molten metal which adheres to the fabric and hardens to form a one-piece metallic shell. 5. The method of treating a double-walled vacuum jar which comprises covering .the inner wall with adhesive tape, and spraying the tape covering with a liquid or plastic in p the appended

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