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Патент USA US2405903

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Aug. 13, i946;
’
P. s. PREMAS
i.
Ésmâßw
DOUGHNUT- FORMING MACHINE
Filed March 17, 1944
JN VEN TOR.
Patented Aug. 13, 1946
¿405.903
UNI TED 'STAT-IES PATE »N T 50 FFI CLE `
2,405,903
f DOUGHNUT-«FORMING NIAGHINE
l
Peter S..'Premas, Chicagoflll.
_Application March 17, 1944,. Serial'No.‘526,9`37
.6 Claims. (01.107452)
2
l‘vl'y invention relates to kitchen or restaurant
utensils employed for the shaping or `cutting of
dough or batter to form doughnuts and the like,
and one object of >the invention is to providea
machine for this pur-pose which is compact and
light enough to be held in one hand and operated
with the other,
A further object of the invention is to provide
Fig. 5 is a fragmental elevation or a modifican
tion,_ partly in section.
`Referring speciñcally to the drawing, the ma
chine is mainlyin the vform of aV receptacleor
hopper I0 for the vdough or batter I I from which
the doughnuts are formed. The receptacle is
preferably of .the cylindrical Vform shown, .al
though it may be square or `polygcnalin shape
withoutìprejudice toits use or operation. 'The
receptacle. is ¿reduced conically at the bottom, as
indicated at I2,_to terminate _with a throat I3 of
a machine of the above character which has a
relatively large capacity for a'hand utensil, >ena
bling-.asingle filling of dough to produce as many
as six dozen doughnuts.
Another object of the invention is to design the
relatively shallow ,cylindrical form.
.
The throat I3 4receives a bottom closure` on the
novel machine with means to remove and form -a
inside in .the form of.a disolllwhichmakes .a
sliding fit withthe wall of the ~throat and is re
inforced vin the center by upper and lower. plates
I5. .'I'he ,assembly'ofthe disc .and plates is made
ñxed amount of the doug-h or batter each time
the machine is operated,> so that .the size of the
doughnuts and the amount of dough required for
given .number of batch of them maybe ldeiî
nitely or accurately determined.
A still further object ofthe invention is to con
ñne the forming means to the center of the re
fast by riveting-fas indicated at .I6-,to the .lower
end of. a vertical rod 'I‘I located in the center of
The rod is supported by .a
20 the receptacle I6.
cross bar I8 spanning the top ofthe receptacle to
normally 'maintainthe disc I4 just inside the bot
ceptacle in which the dough is deposited, so .that
the lsurrounding portions -of the 'dough may-.be
tom of the throat .i3 .and lend the latter the form
of
a. c_up which contains an amount of dough suf
An additional object of the invention »is to in v25
íicient toform Íone doughnut, whatever 'its pre
clude a mechanism in the machine which'actsion
scribed size may be.
the principle of a plunger, with a special control
The cross bar I`8§is.supported _endwise .on cor
to form and dispense a 'doughnut everytime the
free to move or settle as each'doughnut is formed.
plunger is given a’downstroke.
An important object of the invention is to »de- "
sign the machine `for the easydetachment and
removal of its mechanism,v facilitating the thor
ough cleaning thereof as well asthe doughre
ceptacle to maintain the machine .in a highly
sanitary condition.
Another object of the invention is toconstruct
the machine with a minimum number of neces
sary and sturdy parts, whereby to render the
manufacture of the machine economical and ren
der it durable over along period of use.
with the above objects in View and-any others
which may suggest themselves from the descrip
tion to follow, a better understanding 'of the in
vention may be had -by reference to the accom
panying drawing, in which
Fig. 1 is a vertical section of thev machine in a
position preparatory to the formation of a dough
nut;
ner angle .brackets vIS secured at opposite. ,points
inside. the rim 26 ofrthe receptacle; and the .bar
is extended downwardly with .a. conical enlarge
mentr 2| at the center to Uform a slide bearing for
the. center rod I -I. The latter carries a fixed .col
lar' 22 as a stop relative tothe bearing, 2l inre
sponse to the` tension of a coil spring .23 carried
' by the part .of the rod which >projects above the
cross'bar I8, the spring bearing against. the .bot~
tom of ,an inverted. cap or cup 24 secured to 'the
upper end ofthe lrod bya cross pin >25. It is now
apparent thatthe center rodis. in its vtopmost
40 position, but that the rod maybe lowered byde
pressing the cup 211.
Means .are provided. accessory. to. thecenter rod
IlA toact~ on the dough .in la .direction toV form >the
45 doughnut. The main Yelement .ofsuch means isa
circular, plunger 26..slidably .centered on. .therod
I'I and of a diameter to be slidable in the .throat
I3 Whendepressed from thefull-line position of
Fie'. .l V.to that of.Fig..2. Theplunger is counter
Fig. 2 is a repetition of the central portionof
_in the bottom, asl indicated at.V 27! to. _denne
Fig. 1, indicating .an intermediate position of 50 `sunk
an internallyfbeveled .annular edge >28.
working parts by means'oi dotted lines and the
.The Yplunger Y2li ,is .supported .at the. lower >ends
final positionv thereof by >means of full lines;
of
a» pair ,of Vvertical rods î29 .located on opposite
Fig. 3 .is a top'plan view ,of Fig. 1,- on a reduced
sides .of _the >center` rod I1, .such lower ends l.being
scale;
'
_
screwed .intothe-top of theplunger .as indicated
Fig. 4 isa sectionion'the. line 4-45of. Fig.f1;. and 55 .at
30. `Thevrods29` also rise .slidably throughthe
2,405,903
3
cross bar I8 to the limit formed by ñxed collars
3| according to the positions of the rods in Fig. 1.
At a suitable height above the cross bar the rods
29 are reduced with flat inner sides as indicated
at 32 and further reduced to form terminal screws
33. A tie plate 34 is _perforated for the snug pas
sage of the screws 33, these receiving securing
nuts and washers 35, whereby to firmly secure the
rods to the tie plate. The latter is in turn secured 10
by a center screw 36 to the hub 31 of a cap or
hood 38 of a size suñicient to amply cover the
assembly of the rods 29.
'
The reduced portions 32 of the rods 29 receive
a slidable cross-plate 39, and carry compression.
springs 40 between the same and the tie plate 34
with the primary effect of keeping the cross-plate
seated against the shoulders at the bottoms of the
said reduced portions. Normally` the assembly
of the rods 29 may occupy the topmost position
indicated in Fig. l or a lower position within the
mass of dough Il without causing any change in
the same. However, when a doughnut is to be
4
brackets IS by a pair of split sleeves 42 which re
lease the brackets when slid inwardly to a suñi
cient extent. The cross bar and parts associated
with it may then be raised out of the receptacle,
incidentally leaving the interior thereof clear and
fully accessible for cleaning. The cross bar I8
carries integral strips 43 underneath. These are
of a thickness to tension the bottom ilanges of
the sleeves as they are backed od the angle
brackets, so that the sleeves hold snugly to the
cross bar while it is being handled.
It will be evident from the above description
l that I have provided a light and handy appliance
for the purpose stated. While it is suggestive
15 of a utensil, it contains a mechanism which gives
it the character of a machine, since the dough
feeding and forming actions are positive and
precise. The principle of the feed isolates a pre
scribed amount of the dough for each forming
operation, which factor makes it easy to deter
mine the quantity oi the ñlling for a desired
number of the resulting product. The appliance
need be not'much larger than the common iiour
formed the action of the machine is instituted bv
sifter for use in the home or in lunch rooms.
downward pressure on the cap 38 with one hand
However, where a greater capacity is desired,
while a handle M projecting from the side of the 25 such as inbusy restaurants or plant lunch rooms,
the receptacle may be suspended or otherwise
independently supported. ln such event it is
to hold the disc I4 as a bottom for the receptaclel
preferable to extend the plunger tie plate 34 with
throat I3 despite the pressure induced by the
a side lever d4, as in Fig. 5, and substitute a hook
descent of the plunger 25, since part of this pres 30 45 for the handle III, the illustration suggesting
sure is transmitted or dissipated sidewise in the
that the lever has been pulled down close to the
dough mass. However, when the plunger reaches
hook. Further, the forming unit of the plunger
mechanism positively and uniformly dispenses
the entrance of the throat, as indicated by dotted
the dough charge to the full annular doughnut
lines in Fig’. 2, the knife-like rim 28 of the plunger
cuts the dough in the throat off from the sur~ 35 formation, cutting the same oiî cleanly. Finally,
rounding mass, confining such dough to the
the novel appliance is an article of few parts,
is easy to operate, and is quickly separable for
chamber formed by the plunger 26. the disc I ¿l
and the wall of the throat. Now, the continued
cleaning access and facility. ‘
While I have described the invention along
_down pressure of the plunger is transmitted to
the disc, which is thus forced to gradually drop
speciñc lines, various minor changes or refine
out of the throat, allowing a ring of dough to es
ments may be made therein without departing
cape from the latter marginally. AS the plunger
from its principle, and I desire to consider such
is further depressed'tomeet the disc, as seen in
changes and reñnements as coming within the
Fig. 2, the entire charge of dough is forced from
scope and spirit of the appended claims.
the said chamber, swelling the surrounding dough
I claim:
ring to the desired size of the doughnut indicated
l. A `doughnut forming machine comprising a
by dotted lines in the same ligure.
receptacle for the doughnut dough and having
While the downstroke imposed on the plunger
a bottom discharge throat, a closure disc in the
2B is free until the cross-plate 39 reaches the cup 50 lower end of the throat, a plunger in the re
24 at the top of the center rod I1, such cross
ceptacle designed to be slidable in the throat and
plate'recedes upwardly along the plunger rods 23
normally adapted to engage the dough in the
as the cap or hood 38 is pressed down further,
receptacle at a point spaced above the throat,
compressing> the springs 4B. As the plunger ap
means to depress the plunger into the latter to
preaches bottom, the cross-plate 39 bears on the 55 the extent of coníining the dough in said throat,
cup 24 to compress Vthe spring 23 within the same,
other means actuated by the action of the plunger
so that ultimately all the springs are closely com
tolower said disc from the throat before the
pressed and the cup 24 is about to meet the cross
plunger enters the same to cause the conñned
bar I8 and stop the further movement of the
doughy to issue about said lower end in a surN
mechanism, so that the same appears as in Fig. 2.
60 rounding mass, said plunger being further de~
The knife edge 28 of the plunger also acts with
pressible to lower said disc further and meet the
respect to the disc I4, securing a clean-cut inner
same, the outer bottom edge of the plunger con
edge for the formed doughnut. The flexibility oí
tacting the edge of the disc, and said bottom
the disc makes it adaptable to possible slight de
edge being beveled to substantial sharpness to
viations in the level or alinernent of the plunger,
cut said mass cleanly from the disc.
whereby to secure full marginal contact with the
2. A doughnut forming machine comprising a
receptacle is held with the other hand.
Primarily, the spring 23 is of suilicient strength
knifeedge 28 thereof.
receptacle for the doughnut dough and having
While the mechanism described above is> of
a bottom discharge throat, a closure disc inthe
open construction, it is conceivable that after its . lower end of the throat, a plunger in the recep
use bits of dough or deposits of ñour may cling
tacle designed to be slidable in the throat and
to or tend to clog some of the parts. The mech 70 normally in spaced position above the same,
anism is therefore made to be removable as a
means to depress the plunger into the throat,
unit from the receptacle, so that it may be placed
other means actuated by the action of the plunger
under a hot water faucet or otherwise thoroughly
to lower said disc from the throat, said depress~
cleaned.
The mechanism is only carried by the - ~ ing means comprising a support in the mouth'oí
cross bar I8; and the latter is held to the angle 75
2,405,903
the receptacle, bearings carried by the support,
6
rod in a downward path of said plunger depress
a pair of laterally-spaced rods rising from the
ing means, and a spring between the abutment
plunger through the bearings, a headpiece join
and said support to resist the lowering of the
ing the upper ends of the rods, a cross-plate
disc.
slidable on the rods and seating on stops formed 5
4. A doughnut forming machine comprising a
in the same, compression springs coiled on the
receptacle for the doughnut dough having a
rods between the headpiece and the cross-plate,
bottom discharge throat, a closure disc in the
and an abutment on the support in the descend
lower end of the throat, a rod secured to said
ing path of the cross-plate when the headpiece is
and extending axially of the receptacle,
depressed to a partial extent, the springs yield 10 adisc
support carried by said receptacle adjacent to
ing to the further depression of the headpiece.
the upper end thereof, a cap having a spring,
3. A doughnut forming machine comprising a
said cap secured to said rod and said spring rest
receptacle for the doughnut dough and having
ing on said support resiliently mounting the up~
a bottom discharge throat, a closure disc in the
lower end of the throat, a plunger in the recep 15 per end of said rod, a plunger slidable in the
throat and having an actuating head, said head
tacle designed to be siidable in the throat and
being normally out of contact with and spaced
normally in spaced position above the same,
above said cap.
means to depress the plunger into the throat,
5. The structure of claim 4, the bottom of said
other means actuated by the action of the plunger
plunger being countersunk and having an in
to lower said disc from the throat, said other 20 ternally bevelled edge.
means comprising a rod rising from the disc, a
6. The structure of claim 4, the actuating head
support in the mouth of the receptacle and hav
of said plunger comprising a spring-pressed cross
ing a bearing for the upward passage of the rod,
bar engageable with said spring cap.
an abutment carried by the upper end of the
PETER S. PREMAS.
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