Improvements in and connected with the Closing of Lever-lid Tins.
Year: 1897

page_text: Date of Application, 4th May, 1897-Accepted, 5th June, 1897
COMPLETE SPECIFICATION.
Improvements in and connected with the Closing of Lever-lid Tins.
I, WILLIAM WOOLNOUGH of 49, Belgrave Road, Ilford, Essex, Tinplate Worker,
do hereby declare the nature of this invention and in what manner the same is
to be performed, to be particularly described and ascertained in and by the following
statement:
My invention relates to improvements in or connected with the closing of
"lever-lid "tins, the object being to render same perfectly air-tight, so as to allow
petroleum, oils, syrups, spirits, or other substances to be carried in same with perfect
safety.
In carrying my invention into practical effect, the tin and lid is mainly of the
usual construction the top of the said tin being formed with a central opening around
which is a raised flange bearing all round in an outward direction, while the lid
which is furnished with a circumferential groove or recess passes over the aforesaid
circular flange, the edge of the lid being then forced or closely pressed under the
flange in such a manner as to firmly and securely retain it in position, it being
impossible for the lid to jolt or accidentally spring off, while it is readily removed
upon being levered up by any suitable device.
In order that my invention may be fully understood, I will now proceed to describe
sane with referenco to the accompanying drawings in which Fig. 1 is a side elevation
of a tin embodying this invention, and
Fig. 2 is a plan of same.
Fig. is a sectional view of the lid detached and drawn to an enlarged scale.
Fig. 4 is a similar view of the top of the tin.
Fig. 5 is a detail sectional view through the joint between lid and tin before
closing, and Fig. 6 is a similar view after the joint has been made or the lid closed
down in position.
Like letters of reference indicate corresponding parts throughout the views.
According to my invention the top a of the tin is furnished with a circular
opening in the usual manner surrounded by a raised flange spreading or extending
in an outward direction as shown. The lid is formed with a corresponding
circumferential recessed groove or channeled portion c designed to pass over the
aforesaid flange as shown (Fig. 5).
In order to form the joint which effectually closes the tin, the outer edge g of the
lid is pressed or forced closely under the flange fas shown in Fig. by means of
any suitable tool or device, by this means making a perfectly air-tight joint while
there is no chance or possibility of the lid becoming detached or sprung off by
jolting or shaking, but the lid can be quickly removed or levered off by applying
any suitable device such as a coin for instance under the ledge and prizing it up.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
1. The improvements in and connected with the closing of "lever-lid" tins
substantially as herein described and shown and for the purposes specified.
2. In lever lid tins and for the purpose of forming an air-tight joint, the use
of a flange such as extending or bearing in an outward direction in combination

page_text: with a lid having a grooved, recessed or channelled portion such as c, the edge g of
which is designed to be forced closely under the flange f, substantially as set forth.
F. G. CASSELL
(Of Cassell & Co.),
22, Glasshouse Street, Regent Street, London, W.,
Agent for the Applicant.