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Патент USA US2110384

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March 8, 1938.
Filed Jan. 27,’ 1956
Il "
Mezruzn CR6 rzoZcia
‘a 7776
Patented Mar. s, 1938
Marvin 0t Reynolds‘, Chicago, Ill.
Application January 2'1, 1936, Serial No. 60,911
' 5 Claims. __(c1. 99-113)
of tank I0 generally cylindrical in construction,
My invention relates to the treatment of eggs
in preparation for ordinary use or for drying or
having a bottom II and a false bottom l2 to as
sure the delivery of material in the tank to a
canning the same. It relates more in particular
drain spout l3.
I to an improved process by means of which the
Slightly above the bottom I2 I provide a screen
14. This screen is supported in position by suit
able means such as shown in the drawing. A
ring I6 is brazed or welded to the side walls of
5 eggs are strained and other advantages secured
as will appear from the following description.
In the industries relating to the preparation
and use of products prepared from egg material,
which may be yolks, whites, :or mixed yolks and
10 whites, many different processes have been em
the tank. A ?anged ring I‘! is supported above
the ring l6. Cross members i 8 have .their ends
secured to the ?anged‘ portion of the ring I‘!
ployed. Experience has taught those skilled in
whereby to support the screen 14 in the manner
shown. The screen I4 has an annular ?ange l9
secured thereto, adapted to engage ‘on the out
side of vthe ?ange on the ring ll. In this man 15
ner a ?rm support isprovided for the screen l4
and it is readily removable for cleaning or the
like. A small ring 2| is attached to the screen
to facilitate its removal.
The tank is provided with a_hinged cover 22. 20
. At the top of the tank a ?ange 23 is provided be
acter of the egg product.
It has been suggested in the past to strain eggs tween which ?ange and the cover 22 a gasket 24
is compressed when the cover is clamped in posi
by pumping them continuously through a so
called line strainer or ?lter, a reciprocating pis-‘ tion. This produces a substantially air-tight
joint. A plurality of suitable locking members is
25 ton type of pump, or a rotary “Viking” type of
pump being utilized. While certain advantages ' provided. In the drawing I show pin 26 hinged
to the top of the tank and adapted to extend into
are obtainable by this method of treatment,
an edge recess of the cover 22. A wing nut 21
there are certain disadvantages inherent in the
is provided to vclamp the cover tightly against a
process and which cannot be overcome with such
washer or gasket. It is understood, of course, ~30
the artthat comparatively minor variations in
the treatment of egg products often have very
signi?cant and important results upon the char
acter of the ?nal egg product produced. For
example, the amount and character of agitation
to which egg materials are subjected in the
course of handling them, particularly whether or
not’ the agitation occurs in the presence of air,
20 often have an important bearing upon the char
that any, other quick opening cover attaching
Accordingly, the principal object of my inven
ticn is the provision of an improved process for _ means may be employed.
handling liquid egg material.
Near the top of the tank I connect a pipe 28
leading from a source of air supply under pres
sure ‘with a valve 29 for controlling the admis
Another object is the provision of an improved
v35 process for straining liquid egg products, par
ticularly liquid egg whites. 1
3| is connected by suitable means, to the top and .
bottom of the tank so that- at any time the
amount of egg material present in the tank can
Other objects and features of the invention
will be apparent from the consideration of the
following detailed ‘description taken with the
accompanying drawing wherein the single figure
be determined.
illustrates one general type of apparatus which
may be employed in accordance with my present
course, if desired be in the form of a glass panel
set directly into the side of the tank. In general, '
however, a sight glass of the type shown in the
ported in a tank or container by means of '?uid
7, ‘pressure, through a transversely disposed screen,
more in detail hereinafter.
In'the single ?gure I show a conventional type
The screen I4 may be of several different types
and may be either a woven mesh screen or a
' preferably circular or disk shaped, supported at
and improved functions which I shall describe
This sight glass 3| may, of 40
drawing is satisfactory. This is similar to the
usual water level tubes employed in steam boil 45
In general I accomplish the objects of my in
45 vention by forcing the liquid egg material sup
or near the bottom of the container. Preferably,
50 air or other gas pressure is employed to force
‘the egg material through the screen. By means
of this process I secure very de?nite advantages
sion of‘air to the top of the tank. A sight glass
perforated plate. For egg whites a mesh wire
screen having about; 40 meshes per inch produces 50
good results. For whole' eggs I may employ a
perforated plate containing 90 to 100, 11; inch
diameter, perforations per square inch.
Before describing the manner in which the
tank and screen ‘shown in the drawing are em
the straining action. The material which is being
use of this method causes a very much better
dispersion of the treating material throughout
the egg material and a more homogeneous and
uniform product is produced.
Ordinarily, treating materials of various kinds
8 to 10 per cent of salt as disclosed in Epstein
An additional advantage of the use of in
present method is that much less agitation of the
eggs takes place than in othersuggested screen
ing methods and less-air is emulsi?ed with the
are employed in the egg material such as about
incorporated with the egg material is not readily
passed through the screen until it is in a ?nely
divided or dissolved condition. Accordinsly, the
10 the product is frozen and maintained in a frozen
.condition in a warehouse until ready for use.
The screen employedin the bottom of the con
tainer, quickly builds up a mat which improves
ployed, I shall explain brie?y the manner in
which eggs are handled in conventional practice.
The eggs after candling are broken, the yolks
and whites separated, if a separate yolk or white
product is to be produced-,or the whole egg may
be employed if a mixed yolk and white product
is to be produced. The egg product is ordinarily
packed in a tinned metal can which holds 30
pounds of egg material. After packing in the can
Patent No. 1,730,879, or an'improving substance ‘egg material. I have found that with a large
batch of eggs present in the tank II, the relative.
such as those described in the recently'issued
patent to Harris et al. No. 2,026,631. These surface in contact with the air under pressure is
very small. Moreover, that surface is not broken added materials must be thoroughly mixed, dis
solved or dispersed inthe egg material. In addi- ' up and there is no opportunity of entrapping air
tion, particles of shells that ?nd their way into
the egg material, foreign matter which might be
introduced, and chalazae should be removed if a
good product is to-be produced.
One method that has been employed is to
pump the egg material continuously-through a
line'strainer to produce a homogeneous product
with substantially no hits ‘of shells and the like
present, and then to deliver the screened liquid
mechanically. The resultis quite surprising in
that even after comparatively long standing suf
ficient air is not introduced into the eggs to cause
any noticeable foaming after the release of pres
sure as, for example, when the eggs are delivered
to a standard can. In ordinary practice, how
ever, the eggs are in contact with air under pres-7
sure, of course, only a relatively short time.
The use of ‘a circular or disk like screen has
very great advantages in that it is easily removed
and very easily cleaned. While my present in
in the previously screened egg material. From vention does not lend itself to continuous opera
this mixing and treating tank the liquid egg ma -tion,.but rather requires “batch operation”, it
terial was withdrawn, weighed out in cans and offers advantages not possessed by methods sug
egg product to a mixingand treating tank where
the additional material added was incorporated
then delivered to the freezing room.
. gested for continuous operation.
This is partic- -
In the use of my present invention, I place ularly true since continuous operation is not sat
approximately’ 300 pounds of an egg material - isfactory'in any event when a de?nite amount of
which has not been previously treated, except addition substance'is to be introduced into the
possibly with a simple gravity strainer or over
_ The screen employed is disposed transversely of
a cascade, to remove any large pieces of shell
that may be present. This egg material is then the tank, as distinguished from ‘a line strainer, for
treated by the addition thereto of whatever example, which is disposed longitudinally of a
treating material is to be employed, for example conduit or container in which it is housed. The
8 to 10 per cent of ordinary sodium chloride. strainer which I employ has an effective ?ltering
For the purpose of mixing the sodium chloride, I surface either slightly less than, or not appre
may if desired utilize mixing arms in the tank Ill ciably greater than, the cross sectional area of the
itself or preliminary mixing of the salt and egg _ tank, although it may be made conicalor convex,
material may be done by hand. Instead of mix
or have‘some shape other than ?at, in order to
ing the treating material with the eggs in the
increase its strength, if desired.
tank “I, thetreating material may be added be
Where I refer to the use of air pressure it is
to be understood that‘ I wish toinclude
fore the egg material is'delivered to the tank III.
of any unobjectionable di?icultly water-soluble
This depends somewhat on the material being in
troduced and the most convenient arrangement gas, such as nitrogen, hydrogen, etc.,_ and the
which can be made available for introducing the . term “gas” is used in the claims to include either
egg material into the tank III. For example, the air or such a gas.
It will be understood, of course, that I employ
egg material may be‘ introduced ?rst'into a stor
age tank placed above the tank l0 so that the the term “pressure” in a relative sense; that is
to say, there should be a pressure differential be
egg material can be run by gravity from the stor
age tank into tank Ill.
tween the gas' (air)_ab_ove the eggs, and atthe
The egg material with the treating material
' Present which has been introduced either in the
tank It. or before delivery to tank i0 is now
discharge; Whether pressure above atmospheric
be employed above the‘ egg mass, a partial vacP
uum at the outlet, or a combination of the two,
forced out of the tank III by closing the cover 22 ‘ is of course immaterial.
and introducing air through the air line 28. Or
I have described my invention in
consid- ‘
dinarily not more than about 40 pounds‘ of air is 'erabledetail toassistthoseskilledintheartin
practicing the same, but I do not limit myself to
necessary above the egg material to have suf
?cient ?uid piston effect to expel the eggmaterial. the speci?c details‘ described, the invention being
One advantage is that the egg material may be
weighed out directly, the valve attached, to the
drain spout l3 being opened or closed at will.
During the time that the drain spout is closed
limited only by the scope of the claims.
. '
What‘I claim as new and desire to protect by
Letters Patent'of the United‘ States is: >
1. The method ofrtreating liquid egg material,
the pressure above the egg material remains stat
ic and no harm will result such as would take
place if a positive acting pump were being em
which comprises introducing the liquid .egg ma
ployed to force the egg material-through the
screen therein, closing the top of said tank, and f "_
presure into said tank 75‘
-75 screen.
terial into a relatively large capacity tank pro
vided with a relatively large area ?ne mesh
above the level of said egg material, whereby to
force‘ the said egg material through said screen.
comprises providing a container having a sub
tial area‘and thickness, and applying pressure
of a gas directly against the surface of said liquid
downwardly through said ?lter without foaming 10
and whereby strings, chalazae and foreign mat
ter are removed from the liquid egg meats and
stantial depth and. cross sectional area and hav
2; The method de?ned in claim 1, wherein ing a ?ne mesh ?lter substantially coextensive
egg modifying material is incorporated in said with the cross sectional area of said container
egg material while in said tank and before the in '_ and disposed near the bottom‘ of said container,
?lling said container with liquid egg meats to a
troducing of gas under pressure therein.
3. A method of treating liquid egg meats which substantial height above said ?lter, and then
comprises providing a body of said liquid egg applying pressure of a gas directly against the
surface of said liquid egg meats to force them
meats in a container, said body having substan
egg meats to force them through a ?ne wire ?lter
without foaming and whereby strings,v chalazae,
and foreign matter are removed from the liquid
15 egg meats and the latter are thinned out and
rendered homogeneous.
4. A method of treating liquid egg meats which
the latter are thinned‘ out and rendered homo
5. The method de?ned in claim 4, wherein the 15
liquid egg meats treated consist of egg'whites.
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