y E. s. MiLLs _ ì 2,410,453 DEN-TURB PACKING - Filed March `14,l 1944 I L 2 Sheets-Sh'eet l E. s. MIL-Ls ` ` 2,410,453 DENTURE PACKING Filed March 14, 1944 2 Sheets-Sheet 2 Patented Nov. 5, 1946 2,410,453 sra'rss rAfrs 2,410,453 orrics DENTURE PACKING Earl S. Mills, Eugene,` Oreg. ApplicationlMarch 14, 1944i, _Serial No. 526,459 1 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 ment. 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 tion. Figure 2 is a side elevational view of the ma chine. . Figure 3 is a horizontal section taken on the (Cl. 18~5.7) 2 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. port. 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 2,410,453 3 4 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. y Il). 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. EARL S. MILLS.