Improvements relating to the Fastening' of Covers' upon Soft Metal Tubes and the 'like.
Year: 1891

page_text: Date of Application, 13th July, 1891-Accepted, 15th Aug., 1891
חזהחו/
CDRCLRO MAX
Improvements relating to the Fastening' of Covers' upon Soft Metal
Tubes and the 'like.
I, JOHANNES PAUL of Alterwall 58, Hamburg in the Empire of Germany
Merchant 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 :-
This invention relates to the method or process of fastening covers upon tubes
or cans or the likerby which the cover is pressed upon the tube or can by means of
a revolving tool or die applied thereto and the object of the invention is to improve
the method or to improve the tool or die so that tubes or the like made of soft
metal or other easily bent material may be successfully provided with tightly closed
covers without danger of crushing the tubes or the like.
For this purpose the tube is pressed into-a-hollow cylindrical tool or die the
diameter of which is according to that of the tube so that the latter is not crushed.
This tool is supported in a suitable manner so that it may be revolved and is
provided with interior mechanism by which a cover plate or disc of soft metal or
other suitable material may be pressed upon and fastened on the tube. The tube
is made with an outwardly extending flange near its mouth of a small breadth
carrying at its outer edge a tubular wall so that the mouth of the tube is of larger
diameter than the main body of the tube and receives the cover which is made
with a circular upright wall around its edge and is fitted into the mouth so as to
rest upon the aforesaid flange after the tube has been filled. The standing edge of
the cover and the tubular wall around the flange, fitting one within the other, are
then folded together by the interior mechanism of the tool and the fold is pressed
down so as to tightly fasten the cover and press the latter down onto the contents
of the tube the latter having been previously sufficiently filled.
The accompanying drawings illustrate the tool by which this is effected and its
application to the covering of a tube.
Figs. 1 to 4. show the tool and tube in longitudinal section in successive
positions.
Fig. 5 is a cross section on the line x x Fig. 4.
Fig. 6 is an end view of the tube with cover placed therein previous to
fastening.
Fig. 7 is a similar view of the same after fastening.
A represents a tube or holder of soft metal such as thin sheet tin which has been
filled with material c to be enclosed therein up to above the level of the flange p.
d is the cover with the tubular wall d'around its edge, which is placed in the mouth
of the tube A and rests upon the contents or upon the flange p. B is the hollow
oylindrical tool which is supported in bearings L of any suitable nature and is
brought into rotation by any suitable gear forming no part of this invention. The
axis of the tool B may be placed vertically or horizontally or at any suitable
incline and the machinery may be arranged to thrust the tool upon the tube or the
latter into the tool. Within the tool B and one within the other slide the two
tubular drivers hi which are respectively thrust towards the mouth of the tool B
by the springs u ul and are held to revolve with the tool B by studs t t engaging
in slots in the tool B. The spring governing the driver h is weaker than
the spring u' and rests against tho flange at the end of the driver i. When the
tube A with cover d'fitted therein is thrust into the tool B the parts z and d¹ in
contact one with the other form substantially one flange and are thrust against the
end h¹ of the driver h made with a straight or hollowed bevel and are turned inwards
thereby the driver A retreating under the pressure. The comparative weakness of

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the spring it allows the driver to be thrust back beyond the end of the driver i
before the latter is compelled also to take part in the bar' ward movement. The
rapid revolution of the tool coupled with the pressure on the toe! or on the tube
and the shape of the drivers causes the edged to be rolled inwards and down-
wards towards the cover d'in the direction of the arrows in Fig. 3 so that the
edge-z d' is rolled up and pressed down upon the cover d.
When the pressure of the tube on the drivers his moyd, the latter are
returned to their original position as in Fig. 1 by the spriedu¹.
Having now. particularly described and ascertained the nature of this said inven-
tion and in what manner the same is to be performed. I declare, that what
I claim is :-
1) The method of fastening caps or covers upon tubular holders made of soft
metal or the like, consisting in placing the same within a sleeve-like tool whereby
the crushing of the holder is prevented during the fastening of the cover.
2) A tool consisting of a sleeve adapted to receive the holder and support the
same against crushing said sleeve containing sliding drivers h, i, two or more,
supported by springs and capable of sliding one within the other and adapted to
enter successively into action for the purpose described.
Dated this 12th dow of Lu 1801
HERBERT & Co.,
18, Buckingham Street, Strand, London, W.C., Agents to Applicant.