Improvements in Jar Closing Devices.
Year: 1899

page_text: Date of Application, 3rd Jan., 1899-Accepted, 18th Feb.,
1899
COMPLETE SPECIFICATION.
Improvements in Jar Closing Devices.
I, GEORGE WASHINGTON BURKHART, of 143, Griswold Street, in the City of
Detroit, State of Michigan, United States of America, Gentleman, do hereby
declare the nature of this invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement:-
:-
The invention consists in a jar closure and particularly in the construction of
a clamping band adapted to be contracted upon the cover and jar, which are
provided with oppositely tapering faces and the band being provided with corre-
sponding faces so that when it is contracted it will draw the cover onto the top
of the jar and make a tight joint.
The invention consists in the construction of this band of a single piece of sheet
metal with overlapping ends, which ends are connected by a link, the parts being
constructed and operating in the manner hereinafter set forth.
In the drawings, Fig. I is a perspective view of the top of a jar showing my
invention applied thereto.
Fig. 2 is a top plan of my clamping band, showing it open.
Fig. 3 is a perspective view of the link.
Fig. 4 is a vertical section through one side of the jar and cover illustrating
its construction.
A represents an ordinary fruit jar of which B is the cover fitted thereon, pre-
ferably outside of a flange C on the jar, which represents the "bust-off" flange
of the jar in manufacturing the cover, being provided with a downwardly extend-
ing flange D at its rear edge which rests on a packing E on the shoulder F around
the outer face of the top of the jar.
The under side of this shoulder is formed by the bevel face G and the top is
provided with an oppositely beveled face H, against which the lips I on opposite
edges of the clamping band J engage. It is obvious that the contracting of the
band about the top will draw the cover tightly upon the packing ring E.
This part of the structure I do not claim as my invention, as my invention relates
solely to the construction of the band itself.
Heretofore in the manufacture of such devices it has been found necessary to
use a lever which was connected at one end of the band and the fulcrum of which
was connected to the other end of the band. This necessitates a lever of some
considerable length and necessitates considerable thickness of the band at the
point where the lever is attached and adds considerably to the expense of the
device.
With my invention I form the tongue K at the outer end of the band and form
a bearing therein for one end of the link L, by simply bending the
end of the tongue around the ends of the link, which as shown in
Fig. 3 is U-shaped. This
saves any riveting at this point as would
be necessary in putting a fulcrum point in for the lover as hereto-
fore. provide on the inner end of the band the apertured ears M, and

page_text: I provide on the inner end of the link, the outwardly extending pins 0. These
pins may be engaged with the apertures in the ears M by pressing the two sides of
the link together, then inserting the end between the ears and allowing the legs to
separate by the tension of the spring link and entering the apertures, as shown
in Fig. 1 and 2. Thus I am enabled not only to dispense with the long lever
formerly required but also to dispense with any riveting, or similar labor in
getting the parts together, thereby greatly reducing the expense of manufacture
and simplifying the device.
The parts being thus constructed, the band is opened, as shown in Fig. 2,
engaged over the cover and then the operator presses on the outer end of the link i
and forces it into parallelism with the sides of the jar, as shown in Fig. 1, thereby
moving the link beyond the central line of strain between the pivotal point thereof
and locking it in position in the well known manner. To effect this I usually
find it necessary to curve the link slightly to conform to the side of the jar.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is:
The jar closure as herein shown and described.