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Патент USA US2410453

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y E. s. MiLLs
Filed March `14,l 1944
2 Sheets-Sh'eet l
E. s. MIL-Ls
` 2,410,453
Filed March 14, 1944
2 Sheets-Sheet 2
Patented Nov. 5, 1946
sra'rss rAfrs
Earl S. Mills, Eugene,` Oreg.
ApplicationlMarch 14, 1944i, _Serial No. 526,459
3 Claims.
y This invention relates to new and useful im
provements in denture packing and more partic
ularly to an adjustable device for exerting pack
ing pressure on dental'ilasks to the end that the
same can be closed and secured preparatory to
heat processing.
An important object of _the invention is to pro
vide a device of the character stated which will
exert suflicient pressure on a denture contain
ing flask to permit proper closing of the ilask
without breaking the invested model or invest
Other important objects and advantages of the
invention will become apparent to the reader of
the following description.
In the drawings:
Figure 1 represents a fragmentary side eleva
tional view with parts broken away and in sec
Figure 2 is a side elevational view of the ma
Figure 3 is a horizontal section taken on the
(Cl. 18~5.7)
Numeral 26 generally refers to a clamp >in
whichV a denture flask' ZI may be placed. This
clamp 26' consists of a bottom U-.shaped section
22 having its upstanding portions apertured to
receive eyes 23 at the lower ends of eye-bolts 24
which are disposed upwardly through slots in
the ends of a bridge plate 25. Wing nuts 26 are
provided for the upper threaded ends of the eye-_
bolts 24.
It can be seen, that a ilask 2 l is first set upon
the clamp section 22 after which the bolts 24
are disposed through the slots in the bridge plate
26 and the wing nuts 26 secured down upon this
bridge member 26 for preliminarily holding the
15 flask closed.
A slot 2l’ is provided in one side wall of the
shell 5 land through this extends an elongated
foot lever 28 fulcrumed as at 29 and having a
hook formation 66 at its inner end. This hook
formation is preferably bifurcated and straddles
the lower T-structure 3| of a rod 32, the latter
line 3*3 of Figure l.
being threadably disposed into a cross pin 34
Figure ¿l is a top plan view of the clamp.
journaled in bars as at 34a on the bottom of a
Figure 5 is a fragmentary side elevational View 25 frame-like connector 33. This allows for adjust
of the connector.
ment of the rod to regulate the force of a spring
Figure 5 is a side elevational view of the clamp
46, thus allowing for a variation of pressure on
with a portion broken awa .
the nask 2i. The coiled tension spring 35 eX
Referring to the drawings wherein like numer
tends from the bottom of the connector 33 to
als designate like parts, it can be seen that nu 30 connect to an anchor on the inside of the shell
meral S’denotes a two-part vertically disposed
5, this for the purpose of drawing the connector
shell having an inverted U-shaped frame 6 se
downwardly. At the top of the shell 5 is a pres
cured at its upper portion by securing elements 'I.
sure plate 36, the end portions of which are re
This shell 5 may be secured by a bracket 8 and
cessed to straddle the side portions of the frame
securing element 9 and by any other attaching 35 6. The frame 26 with its held denture iiask rests
means found suitable, to a bench or other sup
upon this pressure plate.
Numeral 37 denotes a rod secured by a nut or
A pressure plate i6 is slidable in the frame 6,
nuts 38 at its lower er1-d to the frame co-nnector
the ends being recessed to permit straddling of
33 and said rod 3l extends to the pressure plate
the side portions orf the frame 6 as is apparent 40 36. Interpos'ed between the connector 33 and
in Figures l and 2.
the pressure plate 36 is lthe coiled compression
A slide member I I is vertically slidable through
spring 46. It will be observed that the lower
the top of the frame 6 and through a ñxed par
portion of the rod Slis slidable through an open
tition i2 in close spaced proximity to the top of
ing in the connector 33.
the frame 6. The top of this slide member II
A shaft ¿il is provided in the lower portion of
has a knob I3 and interposed between this knob
the shell 5 and has a notched detent 62 capable
and the top of the frame 6 is a coiled compression
of engaging the hook end 36 of the lever 28 to
spring It. One side of the slide member I l has
hold the same when depressed. A spring «i3 is 1
ratchet teeth I5 with which a slidable detent I5
provided for urging the detent ¿I2 against the
is engageable, this detent being slidably disposed
hook end of the lever 28. At the outer end of
through the upper portion of one side of the
the shaft 6I is a short arm ¿i4 Ato which is con
frame 6 where it is provided with a linger hook
nected the lower end of rod 65, said rods ex
Il. This detent I6 has a spring I8 for holding
tending through a vguide 46 and having a hand
the same against the teeth I5. The lower end
knob 4l.
of the slide member I I is connected to an up 55
It can now be seen, that with the parts as
standing flange I9 on the pressure plate IU.
shown in Figure 1, a, flask placed in the clamp
plate downwardly against the denture ñask into
different set locked positions, and treadle-opera
20 may be set upon the pressure plate 36 and
the plate IU pushed down against the same by
tive self-locking means for exerting yielding pres
the slide member Il and held in this position by
sure upwardly against the lower plate.
the detent i6.
2. In a denture packing machine, apair of upper
The lever28 may now be forced downwardly by
and lower vertically slidable pressure plates, a
the operator’s foot and to be held in depressed
denture flask holder interposed between said
position by the detent 42. Depression of the lever
plates and yieldable under pressure against the
28 forces the connector 33 upwardly in opposi
same, manipulative means to move the upper
tion to the spring 35. Upward movement of the
connector 33 compresses the spring 4U against 10 plate downwardly into diiîerent set posi-tions
against said holder, and treadle-operative means
the pressure plate 36 and thereby yieldingly
_clamps the clamp 20 between said plates 36 and Y for subsequently exerting yielding pressure up
wardly against the lower plate.
3. In a denture packing machine, a pair of
When it is desired that pressure be released, a
slight pressure on the lever 28 and actuation of 15 upper and lower vertically slidable pressure
the control rod 45 to displace the detent 42 will _
permit return of the parts to normal position.
While the foregoing specification sets forth the
invention in speciñc terms, it is to be understood
_ plates, a denture flask holder interposed between
said plates and yieldable under pressure against
the same, manipulative means to move the upper
plate downwardly into different set positions
that numerous changes in the shape, size and 20 against said holder, and treadle-operative means
for subsequently exerting yielding pressure up
materials may be resortedrto without departing
wardly against the lower plate comprising a
from the spirit and scope of the invention as
treadle-forming lever vertically swingable and
claimed hereinafter.
Having described the invention, what is claimed
as new is:
1. In a denture packing machine, a pair of
vertically slidable upper and lower pressure plates,
spaced apart to receive a denture flask therebe
tween, manipulative means to slide the upper
having a short lever arm, a rod movable up
25 wardly by said arm, a vertically slidable connec
tor between said rod and lower plate, operative
by said rod, and a coil spring interposed between
said connector and lower plate.
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