Improvements in Means for Heating Tins or Cans containing Preserved Food."
Year: 1897

page_text: Date of Application, 18th Sept., 1897-Accepted, 4th Dec., 1897
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COMPLETE SPECIFICATION.
Improvements in Means for Heating Tins or Cans containing
Preserved Food."
I, ALBERT. REHSE, of Wülfel, near. Hanover, in the German Empire, Manufacturer
of Preserved Meat and Vegetables, 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 :-
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This invention relates to apparatus for heating that class, of canned foods, which
need to be warmed before being eaten, such as ragouts for instance, and it has for its
object permanently to combine the canned article with a cheap, simple and effective,
heating appliance without altering the usual cylindrical form of the cans,
thus
enabling travellers and the like, provided with such cans to eat their contents in a
warm state without the aid of a wood fire or hot water... vote she tame numii; neg as
According to my invention, the can to be combined with a heating appliance is,
enclosed in a sheet metal case of the same form as, but, of somewhat larger dimensions
than,' the can itself, and the space, between the sides of the can and case is filled with
a liquid fuel such as alcohol, which may be held by absorption in cotton. It will be
readily understood that the user may, after having cut away either of the ends of the
outer case, take out the can, open it, place it on the edge of the sides of the case and
kindle the liquid fuel. I prefer, however, for the sake of convenience and for giving
free access to the air necessary for combustion, also to enclose in the said case a kind
of grate made of crossed and folded sheet metal strips, and intended to be placed,
after unfolding the same, in the opened case while the can containing the preserved
meat is placed upon the grate and thereby kept at a certain height above the upper
edge of the opened case.,
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As it may also be desirable that the flame should be protected from the wind and
always directed towards the bottom of the can, I provide a slotted or perforated sheet.
metal ring fitting into the case and, allowing of heightening, its sides by partially
pulling the said ring out. The holes or slots of the ring permit the inflow of the air,
so that the whole acts much like a Bunsen burner,
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I prefer to close the can and its case, by folding over the edges of the sides and ends
and introducing a strip of rubber into the folds for the purpose, of hermetically
sealing, a wire for the purpose of opening, the can and case, both, ends of the said
Site Projecting to the outside through a small hole. By gripping the longer end of
the wire with a cleft piece of wood and afterwards winding the wire round the wood,,
the sheet metal will be cut.
To enable my invention to be fully understood I will describe it by reference to the
accompanying drawing, in which:
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Figure 1 is a vertical section of a can enclosed in a case which also contains the
grate made of sheet metal strips and the slotted heightening ring, unt
The right hand half of figure 2,18,a. top.
top view of the outer case, the head of whic
is just being cut away by means of the wire, while the left hand half is a top view of
the can resting in the opened case and having the grate made from metal strips
folded round it;
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page_text: Figure 3 is a vertical section of the can resting on the grate, which is inserted in
the case, heightened by means of the slotted sheet metal ring;
Figure 4 represents, on an enlarged scale, a section of part of the head of the case
or of the can before being connected to the cylindrical portion:
Figure 5 is a similar view of the said cylindrical portion:
Figure 6 is a section showing the cylindrical portion or side having its flange
inserted in the groove of the head; and
Figure 7 is a sectional view illustrating the complete double fold enclosing the
opening wire and hermetic rubber strip.
a is the cylindrical portion of the can containing the preserved meat in a condition
which necessitates warming before being eaten. The two ends or heads b and b¹ of
the can are connected with the cylindrical portion by means of double folds drawn to
an enlarged scale for the sake of clearness. Suitable packing c, by preference
consisting of rubber and not shown in figures 1 and 3, is placed in the said double'"
folds. Figures 4 to 7 illustrate how the rubber packing c is placed in the corrugation
of the head band afterwards flattened when the flange of the cylindrical portion a of
the can is inserted in the groove and the double fold formed by the machine.
Besides the packing c a wire d is inserted in the groove of the upper head 6 of the
can, the said wire having both its ends and d², figure 1, protruding to the outside
through a small hole 62 in the head of the can. The longer protruding end d¹ of the
wire d serves for cutting away the head in the manner illustrated in the right hand
half of figure 2 when hereinafter referring to the sheet metal case enclosing the can
viz, by seizing the wire with a cleft piece of wood,' or with a key f having a hole f¹ and
afterwards rotating the wood or key so as to wind the wire d round the same, when
the wire cuts the sheet metal through as indicated at g.
The can b, a, b¹ is enclosed in a sheet metal case of similar shape but somewhat
larger dimensions whereby a free space or clearance is obtained within the case, round
the can ba b¹, this clearance obviously being smaller than it is shown in figure 1
where the double folds are drawn to an exaggerated scale. This clearance principally
consists of the space formed by the concave bottom 61 of the can and is intended to be
filled with a liquid fuel such as spirit, which may be taken up or absorbed by cotton.
The said case, similarly to the can, consists of a cylindrical portion A and two ends
or heads B and B¹ united by double folds containing rubber packing and the cutting
wire D with its ends D1 and D2 projecting through a hole B' in the head B.
Although the can ba b' may be placed, for heating it, upon the edge of the opened
case B A B in an eccentric position, I prefer to add a grate, by which the can is,
during the heating, raised above the said edge in order to admit air for supporting
combustion. This grate is formed of two crossed and riveted strips h, h of sheet
metal, which, before use are folded round the can, as shown in figures 1 and 2.
When a can of this kind is to be heated, the case B A B¹ must first have its head B
cut away in the manner illustrated by the right hand half of figure 2, when the can
will appear as shewn by the left hand half of figure 2. The user must then grasp the
crossed sheet metal strips h, h and by means thereof withdraw the can from its case.
The grate h, h must then be unfolded, taken off the can and placed in the case, as
shown in figure 3, the opened can placed upon the grate, and the liquid fuel contained
in the can lighted.
In order to prevent the flame from being diverted by the wind, I prefer to combine
the said case B A B¹ with means for protecting the flame without hindering the access
of the air, by means of which the half burnt gases evolved by the liquid fuel are wholly
burnt.
The said means consists of a slotted or perforated annular sheet metal screen k
fitting into the case B A B¹ and having two sheet metal lugs or flaps rivetted to
diametrically opposite points near its top edge. By means of the lugs or flaps k², the
ring can be drawn out from the case B A B₁ into the position shewn in figure 3, in
which position it will keep off the wind and allow the air to flow in through the slots k¹
as indicated by the arrows. Thus the annular slotted screen kacts much like a
Bunsen burner and produces an intense heat.

page_text: It is obvious that the screen k may be connected with the grate h, h by rivets so as
to admit of both parts being taken out from the case together with the can b a b¹.
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 :-
1. The combination with a can of preserved food, requiring to be heated before
being eaten, of a sheet metal case of the same shape and make as the can but
somewhat larger so as to contain the can and allow a small space between, the said
space being filled with liquid fuel, substantially as described.
2. The combination with a can of preserved food, requiring to be heated before
being eaten, of a sheet metal case of the same shape and make as the can but
somewhat larger so as to contain the can and allow a small space between, a grate
made of crossed strips of sheet-metal folded round the can, and a liquid fuel filling
the said space, substantially as described.
3. The combination with a can of preserved food, requiring to be heated before
being eaten, of a sheet metal case of the same shape and make as the can but
somewhat larger so as to contain the can and allow a small space between, a grate
made of crossed strips of sheet metal folded round the can, a perforated or slotted
sheet metal ring adapted to heighten the cylindrical sides of the case when opened
and a liquid fuel filling the free space between the sides of the case and the can,
substantially as described.
4. In a can provided with means, such as are described in claim 3, for heating the
contents thereof, the perforated or slotted heightening ring rivetted to the cross sheet
metal strips forming the grate, substantially as described.
5. Cans and cases, such as are claimed in claims 1, 2 and 3, having their cylindrical
sides connected with the ends or heads by means of double folds containing rubber
packing, a wire being also provided in one of the ends or heads, the ends of which
wire protrude through a small hole, substantially as described.
Dated the 19th
1007
G. F. REDFERN & Co.,
4, South Street, Finsbury, London. Agents for the Applicant.